1a41a177e4
This makes the transition between shadow splits less noticeable, specially when the expensive Blend Splits property is disabled.
2018 lines
67 KiB
GLSL
2018 lines
67 KiB
GLSL
#[vertex]
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#version 450
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#VERSION_DEFINES
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#include "scene_forward_clustered_inc.glsl"
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#define SHADER_IS_SRGB false
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/* INPUT ATTRIBS */
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layout(location = 0) in vec3 vertex_attrib;
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//only for pure render depth when normal is not used
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#ifdef NORMAL_USED
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layout(location = 1) in vec3 normal_attrib;
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#endif
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#if defined(TANGENT_USED) || defined(NORMAL_MAP_USED) || defined(LIGHT_ANISOTROPY_USED)
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layout(location = 2) in vec4 tangent_attrib;
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#endif
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#if defined(COLOR_USED)
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layout(location = 3) in vec4 color_attrib;
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#endif
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#ifdef UV_USED
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layout(location = 4) in vec2 uv_attrib;
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#endif
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#if defined(UV2_USED) || defined(USE_LIGHTMAP) || defined(MODE_RENDER_MATERIAL)
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layout(location = 5) in vec2 uv2_attrib;
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#endif
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#if defined(CUSTOM0_USED)
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layout(location = 6) in vec4 custom0_attrib;
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#endif
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#if defined(CUSTOM1_USED)
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layout(location = 7) in vec4 custom1_attrib;
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#endif
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#if defined(CUSTOM2_USED)
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layout(location = 8) in vec4 custom2_attrib;
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#endif
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#if defined(CUSTOM3_USED)
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layout(location = 9) in vec4 custom3_attrib;
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#endif
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#if defined(BONES_USED) || defined(USE_PARTICLE_TRAILS)
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layout(location = 10) in uvec4 bone_attrib;
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#endif
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#if defined(WEIGHTS_USED) || defined(USE_PARTICLE_TRAILS)
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layout(location = 11) in vec4 weight_attrib;
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#endif
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/* Varyings */
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layout(location = 0) out vec3 vertex_interp;
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#ifdef NORMAL_USED
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layout(location = 1) out vec3 normal_interp;
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#endif
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#if defined(COLOR_USED)
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layout(location = 2) out vec4 color_interp;
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#endif
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#ifdef UV_USED
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layout(location = 3) out vec2 uv_interp;
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#endif
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#if defined(UV2_USED) || defined(USE_LIGHTMAP)
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layout(location = 4) out vec2 uv2_interp;
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#endif
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#if defined(TANGENT_USED) || defined(NORMAL_MAP_USED) || defined(LIGHT_ANISOTROPY_USED)
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layout(location = 5) out vec3 tangent_interp;
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layout(location = 6) out vec3 binormal_interp;
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#endif
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#ifdef MATERIAL_UNIFORMS_USED
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layout(set = MATERIAL_UNIFORM_SET, binding = 0, std140) uniform MaterialUniforms{
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#MATERIAL_UNIFORMS
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} material;
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#endif
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#ifdef MODE_DUAL_PARABOLOID
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layout(location = 8) out float dp_clip;
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#endif
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layout(location = 9) out flat uint instance_index_interp;
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#ifdef USE_MULTIVIEW
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#ifdef has_VK_KHR_multiview
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#define ViewIndex gl_ViewIndex
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#else // has_VK_KHR_multiview
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// !BAS! This needs to become an input once we implement our fallback!
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#define ViewIndex 0
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#endif // has_VK_KHR_multiview
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#else // USE_MULTIVIEW
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// Set to zero, not supported in non stereo
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#define ViewIndex 0
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#endif //USE_MULTIVIEW
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invariant gl_Position;
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#GLOBALS
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void main() {
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vec4 instance_custom = vec4(0.0);
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#if defined(COLOR_USED)
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color_interp = color_attrib;
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#endif
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uint instance_index = draw_call.instance_index;
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bool is_multimesh = bool(instances.data[instance_index].flags & INSTANCE_FLAGS_MULTIMESH);
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if (!is_multimesh) {
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instance_index += gl_InstanceIndex;
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}
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instance_index_interp = instance_index;
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mat4 model_matrix = instances.data[instance_index].transform;
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mat3 model_normal_matrix;
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if (bool(instances.data[instance_index].flags & INSTANCE_FLAGS_NON_UNIFORM_SCALE)) {
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model_normal_matrix = transpose(inverse(mat3(model_matrix)));
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} else {
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model_normal_matrix = mat3(model_matrix);
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}
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if (is_multimesh) {
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//multimesh, instances are for it
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mat4 matrix;
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#ifdef USE_PARTICLE_TRAILS
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uint trail_size = (instances.data[instance_index].flags >> INSTANCE_FLAGS_PARTICLE_TRAIL_SHIFT) & INSTANCE_FLAGS_PARTICLE_TRAIL_MASK;
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uint stride = 3 + 1 + 1; //particles always uses this format
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uint offset = trail_size * stride * gl_InstanceIndex;
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#ifdef COLOR_USED
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vec4 pcolor;
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#endif
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{
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uint boffset = offset + bone_attrib.x * stride;
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matrix = mat4(transforms.data[boffset + 0], transforms.data[boffset + 1], transforms.data[boffset + 2], vec4(0.0, 0.0, 0.0, 1.0)) * weight_attrib.x;
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#ifdef COLOR_USED
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pcolor = transforms.data[boffset + 3] * weight_attrib.x;
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#endif
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}
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if (weight_attrib.y > 0.001) {
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uint boffset = offset + bone_attrib.y * stride;
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matrix += mat4(transforms.data[boffset + 0], transforms.data[boffset + 1], transforms.data[boffset + 2], vec4(0.0, 0.0, 0.0, 1.0)) * weight_attrib.y;
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#ifdef COLOR_USED
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pcolor += transforms.data[boffset + 3] * weight_attrib.y;
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#endif
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}
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if (weight_attrib.z > 0.001) {
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uint boffset = offset + bone_attrib.z * stride;
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matrix += mat4(transforms.data[boffset + 0], transforms.data[boffset + 1], transforms.data[boffset + 2], vec4(0.0, 0.0, 0.0, 1.0)) * weight_attrib.z;
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#ifdef COLOR_USED
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pcolor += transforms.data[boffset + 3] * weight_attrib.z;
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#endif
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}
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if (weight_attrib.w > 0.001) {
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uint boffset = offset + bone_attrib.w * stride;
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matrix += mat4(transforms.data[boffset + 0], transforms.data[boffset + 1], transforms.data[boffset + 2], vec4(0.0, 0.0, 0.0, 1.0)) * weight_attrib.w;
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#ifdef COLOR_USED
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pcolor += transforms.data[boffset + 3] * weight_attrib.w;
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#endif
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}
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instance_custom = transforms.data[offset + 4];
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#ifdef COLOR_USED
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color_interp *= pcolor;
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#endif
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#else
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uint stride = 0;
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{
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//TODO implement a small lookup table for the stride
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if (bool(instances.data[instance_index].flags & INSTANCE_FLAGS_MULTIMESH_FORMAT_2D)) {
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stride += 2;
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} else {
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stride += 3;
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}
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if (bool(instances.data[instance_index].flags & INSTANCE_FLAGS_MULTIMESH_HAS_COLOR)) {
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stride += 1;
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}
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if (bool(instances.data[instance_index].flags & INSTANCE_FLAGS_MULTIMESH_HAS_CUSTOM_DATA)) {
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stride += 1;
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}
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}
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uint offset = stride * gl_InstanceIndex;
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if (bool(instances.data[instance_index].flags & INSTANCE_FLAGS_MULTIMESH_FORMAT_2D)) {
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matrix = mat4(transforms.data[offset + 0], transforms.data[offset + 1], vec4(0.0, 0.0, 1.0, 0.0), vec4(0.0, 0.0, 0.0, 1.0));
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offset += 2;
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} else {
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matrix = mat4(transforms.data[offset + 0], transforms.data[offset + 1], transforms.data[offset + 2], vec4(0.0, 0.0, 0.0, 1.0));
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offset += 3;
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}
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if (bool(instances.data[instance_index].flags & INSTANCE_FLAGS_MULTIMESH_HAS_COLOR)) {
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#ifdef COLOR_USED
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color_interp *= transforms.data[offset];
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#endif
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offset += 1;
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}
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if (bool(instances.data[instance_index].flags & INSTANCE_FLAGS_MULTIMESH_HAS_CUSTOM_DATA)) {
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instance_custom = transforms.data[offset];
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}
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#endif
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//transpose
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matrix = transpose(matrix);
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model_matrix = model_matrix * matrix;
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model_normal_matrix = model_normal_matrix * mat3(matrix);
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}
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vec3 vertex = vertex_attrib;
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#ifdef NORMAL_USED
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vec3 normal = normal_attrib * 2.0 - 1.0;
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#endif
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#if defined(TANGENT_USED) || defined(NORMAL_MAP_USED) || defined(LIGHT_ANISOTROPY_USED)
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vec3 tangent = tangent_attrib.xyz * 2.0 - 1.0;
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float binormalf = tangent_attrib.a * 2.0 - 1.0;
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vec3 binormal = normalize(cross(normal, tangent) * binormalf);
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#endif
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#ifdef UV_USED
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uv_interp = uv_attrib;
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#endif
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#if defined(UV2_USED) || defined(USE_LIGHTMAP)
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uv2_interp = uv2_attrib;
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#endif
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#ifdef OVERRIDE_POSITION
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vec4 position;
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#endif
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#ifdef USE_MULTIVIEW
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mat4 projection_matrix = scene_data.projection_matrix_view[ViewIndex];
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mat4 inv_projection_matrix = scene_data.inv_projection_matrix_view[ViewIndex];
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#else
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mat4 projection_matrix = scene_data.projection_matrix;
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mat4 inv_projection_matrix = scene_data.inv_projection_matrix;
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#endif //USE_MULTIVIEW
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//using world coordinates
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#if !defined(SKIP_TRANSFORM_USED) && defined(VERTEX_WORLD_COORDS_USED)
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vertex = (model_matrix * vec4(vertex, 1.0)).xyz;
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#ifdef NORMAL_USED
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normal = model_normal_matrix * normal;
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#endif
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#if defined(TANGENT_USED) || defined(NORMAL_MAP_USED) || defined(LIGHT_ANISOTROPY_USED)
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tangent = model_normal_matrix * tangent;
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binormal = model_normal_matrix * binormal;
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#endif
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#endif
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float roughness = 1.0;
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mat4 modelview = scene_data.view_matrix * model_matrix;
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mat3 modelview_normal = mat3(scene_data.view_matrix) * model_normal_matrix;
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{
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#CODE : VERTEX
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}
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// using local coordinates (default)
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#if !defined(SKIP_TRANSFORM_USED) && !defined(VERTEX_WORLD_COORDS_USED)
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vertex = (modelview * vec4(vertex, 1.0)).xyz;
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#ifdef NORMAL_USED
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normal = modelview_normal * normal;
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#endif
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#endif
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#if defined(TANGENT_USED) || defined(NORMAL_MAP_USED) || defined(LIGHT_ANISOTROPY_USED)
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binormal = modelview_normal * binormal;
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tangent = modelview_normal * tangent;
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#endif
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//using world coordinates
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#if !defined(SKIP_TRANSFORM_USED) && defined(VERTEX_WORLD_COORDS_USED)
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vertex = (scene_data.view_matrix * vec4(vertex, 1.0)).xyz;
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#ifdef NORMAL_USED
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normal = (scene_data.view_matrix * vec4(normal, 0.0)).xyz;
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#endif
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#if defined(TANGENT_USED) || defined(NORMAL_MAP_USED) || defined(LIGHT_ANISOTROPY_USED)
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binormal = (scene_data.view_matrix * vec4(binormal, 0.0)).xyz;
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tangent = (scene_data.view_matrix * vec4(tangent, 0.0)).xyz;
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#endif
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#endif
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vertex_interp = vertex;
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#ifdef NORMAL_USED
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normal_interp = normal;
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#endif
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#if defined(TANGENT_USED) || defined(NORMAL_MAP_USED) || defined(LIGHT_ANISOTROPY_USED)
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tangent_interp = tangent;
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binormal_interp = binormal;
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#endif
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#ifdef MODE_RENDER_DEPTH
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#ifdef MODE_DUAL_PARABOLOID
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vertex_interp.z *= scene_data.dual_paraboloid_side;
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dp_clip = vertex_interp.z; //this attempts to avoid noise caused by objects sent to the other parabolloid side due to bias
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//for dual paraboloid shadow mapping, this is the fastest but least correct way, as it curves straight edges
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vec3 vtx = vertex_interp;
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float distance = length(vtx);
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vtx = normalize(vtx);
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vtx.xy /= 1.0 - vtx.z;
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vtx.z = (distance / scene_data.z_far);
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vtx.z = vtx.z * 2.0 - 1.0;
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vertex_interp = vtx;
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#endif
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#endif //MODE_RENDER_DEPTH
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#ifdef OVERRIDE_POSITION
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gl_Position = position;
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#else
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gl_Position = projection_matrix * vec4(vertex_interp, 1.0);
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#endif
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#ifdef MODE_RENDER_DEPTH
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if (scene_data.pancake_shadows) {
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if (gl_Position.z <= 0.00001) {
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gl_Position.z = 0.00001;
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}
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}
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#endif
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#ifdef MODE_RENDER_MATERIAL
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if (scene_data.material_uv2_mode) {
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vec2 uv_offset = unpackHalf2x16(draw_call.uv_offset);
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gl_Position.xy = (uv2_attrib.xy + uv_offset) * 2.0 - 1.0;
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gl_Position.z = 0.00001;
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gl_Position.w = 1.0;
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}
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#endif
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}
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#[fragment]
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#version 450
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#VERSION_DEFINES
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#define SHADER_IS_SRGB false
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/* Specialization Constants (Toggles) */
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layout(constant_id = 0) const bool sc_use_forward_gi = false;
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layout(constant_id = 1) const bool sc_use_light_projector = false;
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layout(constant_id = 2) const bool sc_use_light_soft_shadows = false;
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layout(constant_id = 3) const bool sc_use_directional_soft_shadows = false;
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/* Specialization Constants (Values) */
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layout(constant_id = 6) const uint sc_soft_shadow_samples = 4;
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layout(constant_id = 7) const uint sc_penumbra_shadow_samples = 4;
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layout(constant_id = 8) const uint sc_directional_soft_shadow_samples = 4;
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layout(constant_id = 9) const uint sc_directional_penumbra_shadow_samples = 4;
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layout(constant_id = 10) const bool sc_decal_use_mipmaps = true;
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layout(constant_id = 11) const bool sc_projector_use_mipmaps = true;
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// not used in clustered renderer but we share some code with the mobile renderer that requires this.
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const float sc_luminance_multiplier = 1.0;
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#include "scene_forward_clustered_inc.glsl"
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/* Varyings */
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layout(location = 0) in vec3 vertex_interp;
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#ifdef NORMAL_USED
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layout(location = 1) in vec3 normal_interp;
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#endif
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#if defined(COLOR_USED)
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layout(location = 2) in vec4 color_interp;
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#endif
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#ifdef UV_USED
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layout(location = 3) in vec2 uv_interp;
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#endif
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#if defined(UV2_USED) || defined(USE_LIGHTMAP)
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layout(location = 4) in vec2 uv2_interp;
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#endif
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#if defined(TANGENT_USED) || defined(NORMAL_MAP_USED) || defined(LIGHT_ANISOTROPY_USED)
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layout(location = 5) in vec3 tangent_interp;
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layout(location = 6) in vec3 binormal_interp;
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#endif
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#ifdef MODE_DUAL_PARABOLOID
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layout(location = 8) in float dp_clip;
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#endif
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layout(location = 9) in flat uint instance_index_interp;
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#ifdef USE_MULTIVIEW
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#ifdef has_VK_KHR_multiview
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#define ViewIndex gl_ViewIndex
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#else // has_VK_KHR_multiview
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// !BAS! This needs to become an input once we implement our fallback!
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#define ViewIndex 0
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#endif // has_VK_KHR_multiview
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#else // USE_MULTIVIEW
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// Set to zero, not supported in non stereo
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#define ViewIndex 0
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#endif //USE_MULTIVIEW
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//defines to keep compatibility with vertex
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#define model_matrix instances.data[draw_call.instance_index].transform
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#ifdef USE_MULTIVIEW
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#define projection_matrix scene_data.projection_matrix_view[ViewIndex]
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#define inv_projection_matrix scene_data.inv_projection_matrix_view[ViewIndex]
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#else
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#define projection_matrix scene_data.projection_matrix
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#define inv_projection_matrix scene_data.inv_projection_matrix
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#endif
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#if defined(ENABLE_SSS) && defined(ENABLE_TRANSMITTANCE)
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//both required for transmittance to be enabled
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#define LIGHT_TRANSMITTANCE_USED
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#endif
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#ifdef MATERIAL_UNIFORMS_USED
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layout(set = MATERIAL_UNIFORM_SET, binding = 0, std140) uniform MaterialUniforms{
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#MATERIAL_UNIFORMS
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} material;
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#endif
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#GLOBALS
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#ifdef MODE_RENDER_DEPTH
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#ifdef MODE_RENDER_MATERIAL
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layout(location = 0) out vec4 albedo_output_buffer;
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layout(location = 1) out vec4 normal_output_buffer;
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layout(location = 2) out vec4 orm_output_buffer;
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layout(location = 3) out vec4 emission_output_buffer;
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layout(location = 4) out float depth_output_buffer;
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#endif // MODE_RENDER_MATERIAL
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#ifdef MODE_RENDER_NORMAL_ROUGHNESS
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layout(location = 0) out vec4 normal_roughness_output_buffer;
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#ifdef MODE_RENDER_VOXEL_GI
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layout(location = 1) out uvec2 voxel_gi_buffer;
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#endif
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#endif //MODE_RENDER_NORMAL
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#else // RENDER DEPTH
|
|
|
|
#ifdef MODE_SEPARATE_SPECULAR
|
|
|
|
layout(location = 0) out vec4 diffuse_buffer; //diffuse (rgb) and roughness
|
|
layout(location = 1) out vec4 specular_buffer; //specular and SSS (subsurface scatter)
|
|
#else
|
|
|
|
layout(location = 0) out vec4 frag_color;
|
|
#endif // MODE_SEPARATE_SPECULAR
|
|
|
|
#endif // RENDER DEPTH
|
|
|
|
#include "scene_forward_aa_inc.glsl"
|
|
|
|
#if !defined(MODE_RENDER_DEPTH) && !defined(MODE_UNSHADED)
|
|
|
|
// Default to SPECULAR_SCHLICK_GGX.
|
|
#if !defined(SPECULAR_DISABLED) && !defined(SPECULAR_SCHLICK_GGX) && !defined(SPECULAR_TOON)
|
|
#define SPECULAR_SCHLICK_GGX
|
|
#endif
|
|
|
|
#include "scene_forward_lights_inc.glsl"
|
|
|
|
#include "scene_forward_gi_inc.glsl"
|
|
|
|
#endif //!defined(MODE_RENDER_DEPTH) && !defined(MODE_UNSHADED)
|
|
|
|
#ifndef MODE_RENDER_DEPTH
|
|
|
|
vec4 volumetric_fog_process(vec2 screen_uv, float z) {
|
|
vec3 fog_pos = vec3(screen_uv, z * scene_data.volumetric_fog_inv_length);
|
|
if (fog_pos.z < 0.0) {
|
|
return vec4(0.0);
|
|
} else if (fog_pos.z < 1.0) {
|
|
fog_pos.z = pow(fog_pos.z, scene_data.volumetric_fog_detail_spread);
|
|
}
|
|
|
|
return texture(sampler3D(volumetric_fog_texture, material_samplers[SAMPLER_LINEAR_CLAMP]), fog_pos);
|
|
}
|
|
|
|
vec4 fog_process(vec3 vertex) {
|
|
vec3 fog_color = scene_data.fog_light_color;
|
|
|
|
if (scene_data.fog_aerial_perspective > 0.0) {
|
|
vec3 sky_fog_color = vec3(0.0);
|
|
vec3 cube_view = scene_data.radiance_inverse_xform * vertex;
|
|
// mip_level always reads from the second mipmap and higher so the fog is always slightly blurred
|
|
float mip_level = mix(1.0 / MAX_ROUGHNESS_LOD, 1.0, 1.0 - (abs(vertex.z) - scene_data.z_near) / (scene_data.z_far - scene_data.z_near));
|
|
#ifdef USE_RADIANCE_CUBEMAP_ARRAY
|
|
float lod, blend;
|
|
blend = modf(mip_level * MAX_ROUGHNESS_LOD, lod);
|
|
sky_fog_color = texture(samplerCubeArray(radiance_cubemap, material_samplers[SAMPLER_LINEAR_WITH_MIPMAPS_CLAMP]), vec4(cube_view, lod)).rgb;
|
|
sky_fog_color = mix(sky_fog_color, texture(samplerCubeArray(radiance_cubemap, material_samplers[SAMPLER_LINEAR_WITH_MIPMAPS_CLAMP]), vec4(cube_view, lod + 1)).rgb, blend);
|
|
#else
|
|
sky_fog_color = textureLod(samplerCube(radiance_cubemap, material_samplers[SAMPLER_LINEAR_WITH_MIPMAPS_CLAMP]), cube_view, mip_level * MAX_ROUGHNESS_LOD).rgb;
|
|
#endif //USE_RADIANCE_CUBEMAP_ARRAY
|
|
fog_color = mix(fog_color, sky_fog_color, scene_data.fog_aerial_perspective);
|
|
}
|
|
|
|
if (scene_data.fog_sun_scatter > 0.001) {
|
|
vec4 sun_scatter = vec4(0.0);
|
|
float sun_total = 0.0;
|
|
vec3 view = normalize(vertex);
|
|
|
|
for (uint i = 0; i < scene_data.directional_light_count; i++) {
|
|
vec3 light_color = directional_lights.data[i].color * directional_lights.data[i].energy;
|
|
float light_amount = pow(max(dot(view, directional_lights.data[i].direction), 0.0), 8.0);
|
|
fog_color += light_color * light_amount * scene_data.fog_sun_scatter;
|
|
}
|
|
}
|
|
|
|
float fog_amount = 1.0 - exp(min(0.0, -length(vertex) * scene_data.fog_density));
|
|
|
|
if (abs(scene_data.fog_height_density) >= 0.0001) {
|
|
float y = (scene_data.inv_view_matrix * vec4(vertex, 1.0)).y;
|
|
|
|
float y_dist = y - scene_data.fog_height;
|
|
|
|
float vfog_amount = 1.0 - exp(min(0.0, y_dist * scene_data.fog_height_density));
|
|
|
|
fog_amount = max(vfog_amount, fog_amount);
|
|
}
|
|
|
|
return vec4(fog_color, fog_amount);
|
|
}
|
|
|
|
void cluster_get_item_range(uint p_offset, out uint item_min, out uint item_max, out uint item_from, out uint item_to) {
|
|
uint item_min_max = cluster_buffer.data[p_offset];
|
|
item_min = item_min_max & 0xFFFF;
|
|
item_max = item_min_max >> 16;
|
|
|
|
item_from = item_min >> 5;
|
|
item_to = (item_max == 0) ? 0 : ((item_max - 1) >> 5) + 1; //side effect of how it is stored, as item_max 0 means no elements
|
|
}
|
|
|
|
uint cluster_get_range_clip_mask(uint i, uint z_min, uint z_max) {
|
|
int local_min = clamp(int(z_min) - int(i) * 32, 0, 31);
|
|
int mask_width = min(int(z_max) - int(z_min), 32 - local_min);
|
|
return bitfieldInsert(uint(0), uint(0xFFFFFFFF), local_min, mask_width);
|
|
}
|
|
|
|
#endif //!MODE_RENDER DEPTH
|
|
|
|
void main() {
|
|
#ifdef MODE_DUAL_PARABOLOID
|
|
|
|
if (dp_clip > 0.0)
|
|
discard;
|
|
#endif
|
|
|
|
uint instance_index = instance_index_interp;
|
|
|
|
//lay out everything, whatever is unused is optimized away anyway
|
|
vec3 vertex = vertex_interp;
|
|
vec3 view = -normalize(vertex_interp);
|
|
vec3 albedo = vec3(1.0);
|
|
vec3 backlight = vec3(0.0);
|
|
vec4 transmittance_color = vec4(0.0, 0.0, 0.0, 1.0);
|
|
float transmittance_depth = 0.0;
|
|
float transmittance_boost = 0.0;
|
|
float metallic = 0.0;
|
|
float specular = 0.5;
|
|
vec3 emission = vec3(0.0);
|
|
float roughness = 1.0;
|
|
float rim = 0.0;
|
|
float rim_tint = 0.0;
|
|
float clearcoat = 0.0;
|
|
float clearcoat_roughness = 0.0;
|
|
float anisotropy = 0.0;
|
|
vec2 anisotropy_flow = vec2(1.0, 0.0);
|
|
vec4 fog = vec4(0.0);
|
|
#if defined(CUSTOM_RADIANCE_USED)
|
|
vec4 custom_radiance = vec4(0.0);
|
|
#endif
|
|
#if defined(CUSTOM_IRRADIANCE_USED)
|
|
vec4 custom_irradiance = vec4(0.0);
|
|
#endif
|
|
|
|
float ao = 1.0;
|
|
float ao_light_affect = 0.0;
|
|
|
|
float alpha = float(instances.data[instance_index].flags >> INSTANCE_FLAGS_FADE_SHIFT) / float(255.0);
|
|
|
|
#if defined(TANGENT_USED) || defined(NORMAL_MAP_USED) || defined(LIGHT_ANISOTROPY_USED)
|
|
vec3 binormal = normalize(binormal_interp);
|
|
vec3 tangent = normalize(tangent_interp);
|
|
#else
|
|
vec3 binormal = vec3(0.0);
|
|
vec3 tangent = vec3(0.0);
|
|
#endif
|
|
|
|
#ifdef NORMAL_USED
|
|
vec3 normal = normalize(normal_interp);
|
|
|
|
#if defined(DO_SIDE_CHECK)
|
|
if (!gl_FrontFacing) {
|
|
normal = -normal;
|
|
}
|
|
#endif
|
|
|
|
#endif //NORMAL_USED
|
|
|
|
#ifdef UV_USED
|
|
vec2 uv = uv_interp;
|
|
#endif
|
|
|
|
#if defined(UV2_USED) || defined(USE_LIGHTMAP)
|
|
vec2 uv2 = uv2_interp;
|
|
#endif
|
|
|
|
#if defined(COLOR_USED)
|
|
vec4 color = color_interp;
|
|
#endif
|
|
|
|
#if defined(NORMAL_MAP_USED)
|
|
|
|
vec3 normal_map = vec3(0.5);
|
|
#endif
|
|
|
|
float normal_map_depth = 1.0;
|
|
|
|
vec2 screen_uv = gl_FragCoord.xy * scene_data.screen_pixel_size + scene_data.screen_pixel_size * 0.5; //account for center
|
|
|
|
float sss_strength = 0.0;
|
|
|
|
#ifdef ALPHA_SCISSOR_USED
|
|
float alpha_scissor_threshold = 1.0;
|
|
#endif // ALPHA_SCISSOR_USED
|
|
|
|
#ifdef ALPHA_HASH_USED
|
|
float alpha_hash_scale = 1.0;
|
|
#endif // ALPHA_HASH_USED
|
|
|
|
#ifdef ALPHA_ANTIALIASING_EDGE_USED
|
|
float alpha_antialiasing_edge = 0.0;
|
|
vec2 alpha_texture_coordinate = vec2(0.0, 0.0);
|
|
#endif // ALPHA_ANTIALIASING_EDGE_USED
|
|
|
|
{
|
|
#CODE : FRAGMENT
|
|
}
|
|
|
|
#ifdef LIGHT_TRANSMITTANCE_USED
|
|
transmittance_color.a *= sss_strength;
|
|
#endif
|
|
|
|
#ifndef USE_SHADOW_TO_OPACITY
|
|
|
|
#ifdef ALPHA_SCISSOR_USED
|
|
if (alpha < alpha_scissor_threshold) {
|
|
discard;
|
|
}
|
|
#endif // ALPHA_SCISSOR_USED
|
|
|
|
// alpha hash can be used in unison with alpha antialiasing
|
|
#ifdef ALPHA_HASH_USED
|
|
if (alpha < compute_alpha_hash_threshold(vertex, alpha_hash_scale)) {
|
|
discard;
|
|
}
|
|
#endif // ALPHA_HASH_USED
|
|
|
|
// If we are not edge antialiasing, we need to remove the output alpha channel from scissor and hash
|
|
#if (defined(ALPHA_SCISSOR_USED) || defined(ALPHA_HASH_USED)) && !defined(ALPHA_ANTIALIASING_EDGE_USED)
|
|
alpha = 1.0;
|
|
#endif
|
|
|
|
#ifdef ALPHA_ANTIALIASING_EDGE_USED
|
|
// If alpha scissor is used, we must further the edge threshold, otherwise we won't get any edge feather
|
|
#ifdef ALPHA_SCISSOR_USED
|
|
alpha_antialiasing_edge = clamp(alpha_scissor_threshold + alpha_antialiasing_edge, 0.0, 1.0);
|
|
#endif
|
|
alpha = compute_alpha_antialiasing_edge(alpha, alpha_texture_coordinate, alpha_antialiasing_edge);
|
|
#endif // ALPHA_ANTIALIASING_EDGE_USED
|
|
|
|
#ifdef USE_OPAQUE_PREPASS
|
|
if (alpha < scene_data.opaque_prepass_threshold) {
|
|
discard;
|
|
}
|
|
#endif // USE_OPAQUE_PREPASS
|
|
|
|
#endif // !USE_SHADOW_TO_OPACITY
|
|
|
|
#ifdef NORMAL_MAP_USED
|
|
|
|
normal_map.xy = normal_map.xy * 2.0 - 1.0;
|
|
normal_map.z = sqrt(max(0.0, 1.0 - dot(normal_map.xy, normal_map.xy))); //always ignore Z, as it can be RG packed, Z may be pos/neg, etc.
|
|
|
|
normal = normalize(mix(normal, tangent * normal_map.x + binormal * normal_map.y + normal * normal_map.z, normal_map_depth));
|
|
|
|
#endif
|
|
|
|
#ifdef LIGHT_ANISOTROPY_USED
|
|
|
|
if (anisotropy > 0.01) {
|
|
//rotation matrix
|
|
mat3 rot = mat3(tangent, binormal, normal);
|
|
//make local to space
|
|
tangent = normalize(rot * vec3(anisotropy_flow.x, anisotropy_flow.y, 0.0));
|
|
binormal = normalize(rot * vec3(-anisotropy_flow.y, anisotropy_flow.x, 0.0));
|
|
}
|
|
|
|
#endif
|
|
|
|
#ifdef ENABLE_CLIP_ALPHA
|
|
if (albedo.a < 0.99) {
|
|
//used for doublepass and shadowmapping
|
|
discard;
|
|
}
|
|
#endif
|
|
|
|
/////////////////////// FOG //////////////////////
|
|
#ifndef MODE_RENDER_DEPTH
|
|
|
|
#ifndef CUSTOM_FOG_USED
|
|
// fog must be processed as early as possible and then packed.
|
|
// to maximize VGPR usage
|
|
// Draw "fixed" fog before volumetric fog to ensure volumetric fog can appear in front of the sky.
|
|
|
|
if (scene_data.fog_enabled) {
|
|
fog = fog_process(vertex);
|
|
}
|
|
|
|
if (scene_data.volumetric_fog_enabled) {
|
|
vec4 volumetric_fog = volumetric_fog_process(screen_uv, -vertex.z);
|
|
if (scene_data.fog_enabled) {
|
|
//must use the full blending equation here to blend fogs
|
|
vec4 res;
|
|
float sa = 1.0 - volumetric_fog.a;
|
|
res.a = fog.a * sa + volumetric_fog.a;
|
|
if (res.a == 0.0) {
|
|
res.rgb = vec3(0.0);
|
|
} else {
|
|
res.rgb = (fog.rgb * fog.a * sa + volumetric_fog.rgb * volumetric_fog.a) / res.a;
|
|
}
|
|
fog = res;
|
|
} else {
|
|
fog = volumetric_fog;
|
|
}
|
|
}
|
|
#endif //!CUSTOM_FOG_USED
|
|
|
|
uint fog_rg = packHalf2x16(fog.rg);
|
|
uint fog_ba = packHalf2x16(fog.ba);
|
|
|
|
#endif //!MODE_RENDER_DEPTH
|
|
|
|
/////////////////////// DECALS ////////////////////////////////
|
|
|
|
#ifndef MODE_RENDER_DEPTH
|
|
|
|
uvec2 cluster_pos = uvec2(gl_FragCoord.xy) >> scene_data.cluster_shift;
|
|
uint cluster_offset = (scene_data.cluster_width * cluster_pos.y + cluster_pos.x) * (scene_data.max_cluster_element_count_div_32 + 32);
|
|
|
|
uint cluster_z = uint(clamp((-vertex.z / scene_data.z_far) * 32.0, 0.0, 31.0));
|
|
|
|
//used for interpolating anything cluster related
|
|
vec3 vertex_ddx = dFdx(vertex);
|
|
vec3 vertex_ddy = dFdy(vertex);
|
|
|
|
{ // process decals
|
|
|
|
uint cluster_decal_offset = cluster_offset + scene_data.cluster_type_size * 2;
|
|
|
|
uint item_min;
|
|
uint item_max;
|
|
uint item_from;
|
|
uint item_to;
|
|
|
|
cluster_get_item_range(cluster_decal_offset + scene_data.max_cluster_element_count_div_32 + cluster_z, item_min, item_max, item_from, item_to);
|
|
|
|
#ifdef USE_SUBGROUPS
|
|
item_from = subgroupBroadcastFirst(subgroupMin(item_from));
|
|
item_to = subgroupBroadcastFirst(subgroupMax(item_to));
|
|
#endif
|
|
|
|
for (uint i = item_from; i < item_to; i++) {
|
|
uint mask = cluster_buffer.data[cluster_decal_offset + i];
|
|
mask &= cluster_get_range_clip_mask(i, item_min, item_max);
|
|
#ifdef USE_SUBGROUPS
|
|
uint merged_mask = subgroupBroadcastFirst(subgroupOr(mask));
|
|
#else
|
|
uint merged_mask = mask;
|
|
#endif
|
|
|
|
while (merged_mask != 0) {
|
|
uint bit = findMSB(merged_mask);
|
|
merged_mask &= ~(1 << bit);
|
|
#ifdef USE_SUBGROUPS
|
|
if (((1 << bit) & mask) == 0) { //do not process if not originally here
|
|
continue;
|
|
}
|
|
#endif
|
|
uint decal_index = 32 * i + bit;
|
|
|
|
if (!bool(decals.data[decal_index].mask & instances.data[instance_index].layer_mask)) {
|
|
continue; //not masked
|
|
}
|
|
|
|
vec3 uv_local = (decals.data[decal_index].xform * vec4(vertex, 1.0)).xyz;
|
|
if (any(lessThan(uv_local, vec3(0.0, -1.0, 0.0))) || any(greaterThan(uv_local, vec3(1.0)))) {
|
|
continue; //out of decal
|
|
}
|
|
|
|
float fade = pow(1.0 - (uv_local.y > 0.0 ? uv_local.y : -uv_local.y), uv_local.y > 0.0 ? decals.data[decal_index].upper_fade : decals.data[decal_index].lower_fade);
|
|
|
|
if (decals.data[decal_index].normal_fade > 0.0) {
|
|
fade *= smoothstep(decals.data[decal_index].normal_fade, 1.0, dot(normal_interp, decals.data[decal_index].normal) * 0.5 + 0.5);
|
|
}
|
|
|
|
//we need ddx/ddy for mipmaps, so simulate them
|
|
vec2 ddx = (decals.data[decal_index].xform * vec4(vertex_ddx, 0.0)).xz;
|
|
vec2 ddy = (decals.data[decal_index].xform * vec4(vertex_ddy, 0.0)).xz;
|
|
|
|
if (decals.data[decal_index].albedo_rect != vec4(0.0)) {
|
|
//has albedo
|
|
vec4 decal_albedo;
|
|
if (sc_decal_use_mipmaps) {
|
|
decal_albedo = textureGrad(sampler2D(decal_atlas_srgb, decal_sampler), uv_local.xz * decals.data[decal_index].albedo_rect.zw + decals.data[decal_index].albedo_rect.xy, ddx * decals.data[decal_index].albedo_rect.zw, ddy * decals.data[decal_index].albedo_rect.zw);
|
|
} else {
|
|
decal_albedo = textureLod(sampler2D(decal_atlas_srgb, decal_sampler), uv_local.xz * decals.data[decal_index].albedo_rect.zw + decals.data[decal_index].albedo_rect.xy, 0.0);
|
|
}
|
|
decal_albedo *= decals.data[decal_index].modulate;
|
|
decal_albedo.a *= fade;
|
|
albedo = mix(albedo, decal_albedo.rgb, decal_albedo.a * decals.data[decal_index].albedo_mix);
|
|
|
|
if (decals.data[decal_index].normal_rect != vec4(0.0)) {
|
|
vec3 decal_normal;
|
|
if (sc_decal_use_mipmaps) {
|
|
decal_normal = textureGrad(sampler2D(decal_atlas, decal_sampler), uv_local.xz * decals.data[decal_index].normal_rect.zw + decals.data[decal_index].normal_rect.xy, ddx * decals.data[decal_index].normal_rect.zw, ddy * decals.data[decal_index].normal_rect.zw).xyz;
|
|
} else {
|
|
decal_normal = textureLod(sampler2D(decal_atlas, decal_sampler), uv_local.xz * decals.data[decal_index].normal_rect.zw + decals.data[decal_index].normal_rect.xy, 0.0).xyz;
|
|
}
|
|
decal_normal.xy = decal_normal.xy * vec2(2.0, -2.0) - vec2(1.0, -1.0); //users prefer flipped y normal maps in most authoring software
|
|
decal_normal.z = sqrt(max(0.0, 1.0 - dot(decal_normal.xy, decal_normal.xy)));
|
|
//convert to view space, use xzy because y is up
|
|
decal_normal = (decals.data[decal_index].normal_xform * decal_normal.xzy).xyz;
|
|
|
|
normal = normalize(mix(normal, decal_normal, decal_albedo.a));
|
|
}
|
|
|
|
if (decals.data[decal_index].orm_rect != vec4(0.0)) {
|
|
vec3 decal_orm;
|
|
if (sc_decal_use_mipmaps) {
|
|
decal_orm = textureGrad(sampler2D(decal_atlas, decal_sampler), uv_local.xz * decals.data[decal_index].orm_rect.zw + decals.data[decal_index].orm_rect.xy, ddx * decals.data[decal_index].orm_rect.zw, ddy * decals.data[decal_index].orm_rect.zw).xyz;
|
|
} else {
|
|
decal_orm = textureLod(sampler2D(decal_atlas, decal_sampler), uv_local.xz * decals.data[decal_index].orm_rect.zw + decals.data[decal_index].orm_rect.xy, 0.0).xyz;
|
|
}
|
|
ao = mix(ao, decal_orm.r, decal_albedo.a);
|
|
roughness = mix(roughness, decal_orm.g, decal_albedo.a);
|
|
metallic = mix(metallic, decal_orm.b, decal_albedo.a);
|
|
}
|
|
}
|
|
|
|
if (decals.data[decal_index].emission_rect != vec4(0.0)) {
|
|
//emission is additive, so its independent from albedo
|
|
if (sc_decal_use_mipmaps) {
|
|
emission += textureGrad(sampler2D(decal_atlas_srgb, decal_sampler), uv_local.xz * decals.data[decal_index].emission_rect.zw + decals.data[decal_index].emission_rect.xy, ddx * decals.data[decal_index].emission_rect.zw, ddy * decals.data[decal_index].emission_rect.zw).xyz * decals.data[decal_index].emission_energy * fade;
|
|
} else {
|
|
emission += textureLod(sampler2D(decal_atlas_srgb, decal_sampler), uv_local.xz * decals.data[decal_index].emission_rect.zw + decals.data[decal_index].emission_rect.xy, 0.0).xyz * decals.data[decal_index].emission_energy * fade;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
//pack albedo until needed again, saves 2 VGPRs in the meantime
|
|
|
|
#endif //not render depth
|
|
/////////////////////// LIGHTING //////////////////////////////
|
|
|
|
#ifdef NORMAL_USED
|
|
if (scene_data.roughness_limiter_enabled) {
|
|
//https://www.jp.square-enix.com/tech/library/pdf/ImprovedGeometricSpecularAA.pdf
|
|
float roughness2 = roughness * roughness;
|
|
vec3 dndu = dFdx(normal), dndv = dFdy(normal);
|
|
float variance = scene_data.roughness_limiter_amount * (dot(dndu, dndu) + dot(dndv, dndv));
|
|
float kernelRoughness2 = min(2.0 * variance, scene_data.roughness_limiter_limit); //limit effect
|
|
float filteredRoughness2 = min(1.0, roughness2 + kernelRoughness2);
|
|
roughness = sqrt(filteredRoughness2);
|
|
}
|
|
#endif
|
|
//apply energy conservation
|
|
|
|
vec3 specular_light = vec3(0.0, 0.0, 0.0);
|
|
vec3 diffuse_light = vec3(0.0, 0.0, 0.0);
|
|
vec3 ambient_light = vec3(0.0, 0.0, 0.0);
|
|
|
|
#if !defined(MODE_RENDER_DEPTH) && !defined(MODE_UNSHADED)
|
|
|
|
if (scene_data.use_reflection_cubemap) {
|
|
#ifdef LIGHT_ANISOTROPY_USED
|
|
// https://google.github.io/filament/Filament.html#lighting/imagebasedlights/anisotropy
|
|
vec3 anisotropic_direction = anisotropy >= 0.0 ? binormal : tangent;
|
|
vec3 anisotropic_tangent = cross(anisotropic_direction, view);
|
|
vec3 anisotropic_normal = cross(anisotropic_tangent, anisotropic_direction);
|
|
vec3 bent_normal = normalize(mix(normal, anisotropic_normal, abs(anisotropy) * clamp(5.0 * roughness, 0.0, 1.0)));
|
|
vec3 ref_vec = reflect(-view, bent_normal);
|
|
#else
|
|
vec3 ref_vec = reflect(-view, normal);
|
|
#endif
|
|
|
|
float horizon = min(1.0 + dot(ref_vec, normal), 1.0);
|
|
ref_vec = scene_data.radiance_inverse_xform * ref_vec;
|
|
#ifdef USE_RADIANCE_CUBEMAP_ARRAY
|
|
|
|
float lod, blend;
|
|
blend = modf(roughness * MAX_ROUGHNESS_LOD, lod);
|
|
specular_light = texture(samplerCubeArray(radiance_cubemap, material_samplers[SAMPLER_LINEAR_WITH_MIPMAPS_CLAMP]), vec4(ref_vec, lod)).rgb;
|
|
specular_light = mix(specular_light, texture(samplerCubeArray(radiance_cubemap, material_samplers[SAMPLER_LINEAR_WITH_MIPMAPS_CLAMP]), vec4(ref_vec, lod + 1)).rgb, blend);
|
|
|
|
#else
|
|
specular_light = textureLod(samplerCube(radiance_cubemap, material_samplers[SAMPLER_LINEAR_WITH_MIPMAPS_CLAMP]), ref_vec, roughness * MAX_ROUGHNESS_LOD).rgb;
|
|
|
|
#endif //USE_RADIANCE_CUBEMAP_ARRAY
|
|
specular_light *= horizon * horizon;
|
|
specular_light *= scene_data.ambient_light_color_energy.a;
|
|
}
|
|
|
|
#if defined(CUSTOM_RADIANCE_USED)
|
|
specular_light = mix(specular_light, custom_radiance.rgb, custom_radiance.a);
|
|
#endif
|
|
|
|
#ifndef USE_LIGHTMAP
|
|
//lightmap overrides everything
|
|
if (scene_data.use_ambient_light) {
|
|
ambient_light = scene_data.ambient_light_color_energy.rgb;
|
|
|
|
if (scene_data.use_ambient_cubemap) {
|
|
vec3 ambient_dir = scene_data.radiance_inverse_xform * normal;
|
|
#ifdef USE_RADIANCE_CUBEMAP_ARRAY
|
|
vec3 cubemap_ambient = texture(samplerCubeArray(radiance_cubemap, material_samplers[SAMPLER_LINEAR_WITH_MIPMAPS_CLAMP]), vec4(ambient_dir, MAX_ROUGHNESS_LOD)).rgb;
|
|
#else
|
|
vec3 cubemap_ambient = textureLod(samplerCube(radiance_cubemap, material_samplers[SAMPLER_LINEAR_WITH_MIPMAPS_CLAMP]), ambient_dir, MAX_ROUGHNESS_LOD).rgb;
|
|
#endif //USE_RADIANCE_CUBEMAP_ARRAY
|
|
|
|
ambient_light = mix(ambient_light, cubemap_ambient * scene_data.ambient_light_color_energy.a, scene_data.ambient_color_sky_mix);
|
|
}
|
|
}
|
|
#endif // USE_LIGHTMAP
|
|
#if defined(CUSTOM_IRRADIANCE_USED)
|
|
ambient_light = mix(ambient_light, custom_irradiance.rgb, custom_irradiance.a);
|
|
#endif
|
|
|
|
#ifdef LIGHT_CLEARCOAT_USED
|
|
|
|
if (scene_data.use_reflection_cubemap) {
|
|
vec3 n = normalize(normal_interp); // We want to use geometric normal, not normal_map
|
|
float NoV = max(dot(n, view), 0.0001);
|
|
vec3 ref_vec = reflect(-view, n);
|
|
// The clear coat layer assumes an IOR of 1.5 (4% reflectance)
|
|
float Fc = clearcoat * (0.04 + 0.96 * SchlickFresnel(NoV));
|
|
float attenuation = 1.0 - Fc;
|
|
ambient_light *= attenuation;
|
|
specular_light *= attenuation;
|
|
|
|
float horizon = min(1.0 + dot(ref_vec, normal), 1.0);
|
|
ref_vec = scene_data.radiance_inverse_xform * ref_vec;
|
|
float roughness_lod = mix(0.001, 0.1, clearcoat_roughness) * MAX_ROUGHNESS_LOD;
|
|
#ifdef USE_RADIANCE_CUBEMAP_ARRAY
|
|
|
|
float lod, blend;
|
|
blend = modf(roughness_lod, lod);
|
|
vec3 clearcoat_light = texture(samplerCubeArray(radiance_cubemap, material_samplers[SAMPLER_LINEAR_WITH_MIPMAPS_CLAMP]), vec4(ref_vec, lod)).rgb;
|
|
clearcoat_light = mix(clearcoat_light, texture(samplerCubeArray(radiance_cubemap, material_samplers[SAMPLER_LINEAR_WITH_MIPMAPS_CLAMP]), vec4(ref_vec, lod + 1)).rgb, blend);
|
|
|
|
#else
|
|
vec3 clearcoat_light = textureLod(samplerCube(radiance_cubemap, material_samplers[SAMPLER_LINEAR_WITH_MIPMAPS_CLAMP]), ref_vec, roughness_lod).rgb;
|
|
|
|
#endif //USE_RADIANCE_CUBEMAP_ARRAY
|
|
specular_light += clearcoat_light * horizon * horizon * Fc * scene_data.ambient_light_color_energy.a;
|
|
}
|
|
#endif
|
|
#endif //!defined(MODE_RENDER_DEPTH) && !defined(MODE_UNSHADED)
|
|
|
|
//radiance
|
|
|
|
/// GI ///
|
|
#if !defined(MODE_RENDER_DEPTH) && !defined(MODE_UNSHADED)
|
|
|
|
#ifdef USE_LIGHTMAP
|
|
|
|
//lightmap
|
|
if (bool(instances.data[instance_index].flags & INSTANCE_FLAGS_USE_LIGHTMAP_CAPTURE)) { //has lightmap capture
|
|
uint index = instances.data[instance_index].gi_offset;
|
|
|
|
vec3 wnormal = mat3(scene_data.inv_view_matrix) * normal;
|
|
const float c1 = 0.429043;
|
|
const float c2 = 0.511664;
|
|
const float c3 = 0.743125;
|
|
const float c4 = 0.886227;
|
|
const float c5 = 0.247708;
|
|
ambient_light += (c1 * lightmap_captures.data[index].sh[8].rgb * (wnormal.x * wnormal.x - wnormal.y * wnormal.y) +
|
|
c3 * lightmap_captures.data[index].sh[6].rgb * wnormal.z * wnormal.z +
|
|
c4 * lightmap_captures.data[index].sh[0].rgb -
|
|
c5 * lightmap_captures.data[index].sh[6].rgb +
|
|
2.0 * c1 * lightmap_captures.data[index].sh[4].rgb * wnormal.x * wnormal.y +
|
|
2.0 * c1 * lightmap_captures.data[index].sh[7].rgb * wnormal.x * wnormal.z +
|
|
2.0 * c1 * lightmap_captures.data[index].sh[5].rgb * wnormal.y * wnormal.z +
|
|
2.0 * c2 * lightmap_captures.data[index].sh[3].rgb * wnormal.x +
|
|
2.0 * c2 * lightmap_captures.data[index].sh[1].rgb * wnormal.y +
|
|
2.0 * c2 * lightmap_captures.data[index].sh[2].rgb * wnormal.z);
|
|
|
|
} else if (bool(instances.data[instance_index].flags & INSTANCE_FLAGS_USE_LIGHTMAP)) { // has actual lightmap
|
|
bool uses_sh = bool(instances.data[instance_index].flags & INSTANCE_FLAGS_USE_SH_LIGHTMAP);
|
|
uint ofs = instances.data[instance_index].gi_offset & 0xFFFF;
|
|
vec3 uvw;
|
|
uvw.xy = uv2 * instances.data[instance_index].lightmap_uv_scale.zw + instances.data[instance_index].lightmap_uv_scale.xy;
|
|
uvw.z = float((instances.data[instance_index].gi_offset >> 16) & 0xFFFF);
|
|
|
|
if (uses_sh) {
|
|
uvw.z *= 4.0; //SH textures use 4 times more data
|
|
vec3 lm_light_l0 = textureLod(sampler2DArray(lightmap_textures[ofs], material_samplers[SAMPLER_LINEAR_CLAMP]), uvw + vec3(0.0, 0.0, 0.0), 0.0).rgb;
|
|
vec3 lm_light_l1n1 = textureLod(sampler2DArray(lightmap_textures[ofs], material_samplers[SAMPLER_LINEAR_CLAMP]), uvw + vec3(0.0, 0.0, 1.0), 0.0).rgb;
|
|
vec3 lm_light_l1_0 = textureLod(sampler2DArray(lightmap_textures[ofs], material_samplers[SAMPLER_LINEAR_CLAMP]), uvw + vec3(0.0, 0.0, 2.0), 0.0).rgb;
|
|
vec3 lm_light_l1p1 = textureLod(sampler2DArray(lightmap_textures[ofs], material_samplers[SAMPLER_LINEAR_CLAMP]), uvw + vec3(0.0, 0.0, 3.0), 0.0).rgb;
|
|
|
|
uint idx = instances.data[instance_index].gi_offset >> 20;
|
|
vec3 n = normalize(lightmaps.data[idx].normal_xform * normal);
|
|
|
|
ambient_light += lm_light_l0 * 0.282095f;
|
|
ambient_light += lm_light_l1n1 * 0.32573 * n.y;
|
|
ambient_light += lm_light_l1_0 * 0.32573 * n.z;
|
|
ambient_light += lm_light_l1p1 * 0.32573 * n.x;
|
|
if (metallic > 0.01) { // since the more direct bounced light is lost, we can kind of fake it with this trick
|
|
vec3 r = reflect(normalize(-vertex), normal);
|
|
specular_light += lm_light_l1n1 * 0.32573 * r.y;
|
|
specular_light += lm_light_l1_0 * 0.32573 * r.z;
|
|
specular_light += lm_light_l1p1 * 0.32573 * r.x;
|
|
}
|
|
|
|
} else {
|
|
ambient_light += textureLod(sampler2DArray(lightmap_textures[ofs], material_samplers[SAMPLER_LINEAR_CLAMP]), uvw, 0.0).rgb;
|
|
}
|
|
}
|
|
#else
|
|
|
|
if (sc_use_forward_gi && bool(instances.data[instance_index].flags & INSTANCE_FLAGS_USE_SDFGI)) { //has lightmap capture
|
|
|
|
//make vertex orientation the world one, but still align to camera
|
|
vec3 cam_pos = mat3(scene_data.inv_view_matrix) * vertex;
|
|
vec3 cam_normal = mat3(scene_data.inv_view_matrix) * normal;
|
|
vec3 cam_reflection = mat3(scene_data.inv_view_matrix) * reflect(-view, normal);
|
|
|
|
//apply y-mult
|
|
cam_pos.y *= sdfgi.y_mult;
|
|
cam_normal.y *= sdfgi.y_mult;
|
|
cam_normal = normalize(cam_normal);
|
|
cam_reflection.y *= sdfgi.y_mult;
|
|
cam_normal = normalize(cam_normal);
|
|
cam_reflection = normalize(cam_reflection);
|
|
|
|
vec4 light_accum = vec4(0.0);
|
|
float weight_accum = 0.0;
|
|
|
|
vec4 light_blend_accum = vec4(0.0);
|
|
float weight_blend_accum = 0.0;
|
|
|
|
float blend = -1.0;
|
|
|
|
// helper constants, compute once
|
|
|
|
uint cascade = 0xFFFFFFFF;
|
|
vec3 cascade_pos;
|
|
vec3 cascade_normal;
|
|
|
|
for (uint i = 0; i < sdfgi.max_cascades; i++) {
|
|
cascade_pos = (cam_pos - sdfgi.cascades[i].position) * sdfgi.cascades[i].to_probe;
|
|
|
|
if (any(lessThan(cascade_pos, vec3(0.0))) || any(greaterThanEqual(cascade_pos, sdfgi.cascade_probe_size))) {
|
|
continue; //skip cascade
|
|
}
|
|
|
|
cascade = i;
|
|
break;
|
|
}
|
|
|
|
if (cascade < SDFGI_MAX_CASCADES) {
|
|
bool use_specular = true;
|
|
float blend;
|
|
vec3 diffuse, specular;
|
|
sdfgi_process(cascade, cascade_pos, cam_pos, cam_normal, cam_reflection, use_specular, roughness, diffuse, specular, blend);
|
|
|
|
if (blend > 0.0) {
|
|
//blend
|
|
if (cascade == sdfgi.max_cascades - 1) {
|
|
diffuse = mix(diffuse, ambient_light, blend);
|
|
if (use_specular) {
|
|
specular = mix(specular, specular_light, blend);
|
|
}
|
|
} else {
|
|
vec3 diffuse2, specular2;
|
|
float blend2;
|
|
cascade_pos = (cam_pos - sdfgi.cascades[cascade + 1].position) * sdfgi.cascades[cascade + 1].to_probe;
|
|
sdfgi_process(cascade + 1, cascade_pos, cam_pos, cam_normal, cam_reflection, use_specular, roughness, diffuse2, specular2, blend2);
|
|
diffuse = mix(diffuse, diffuse2, blend);
|
|
if (use_specular) {
|
|
specular = mix(specular, specular2, blend);
|
|
}
|
|
}
|
|
}
|
|
|
|
ambient_light = diffuse;
|
|
if (use_specular) {
|
|
specular_light = specular;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (sc_use_forward_gi && bool(instances.data[instance_index].flags & INSTANCE_FLAGS_USE_VOXEL_GI)) { // process voxel_gi_instances
|
|
|
|
uint index1 = instances.data[instance_index].gi_offset & 0xFFFF;
|
|
vec3 ref_vec = normalize(reflect(normalize(vertex), normal));
|
|
//find arbitrary tangent and bitangent, then build a matrix
|
|
vec3 v0 = abs(normal.z) < 0.999 ? vec3(0.0, 0.0, 1.0) : vec3(0.0, 1.0, 0.0);
|
|
vec3 tangent = normalize(cross(v0, normal));
|
|
vec3 bitangent = normalize(cross(tangent, normal));
|
|
mat3 normal_mat = mat3(tangent, bitangent, normal);
|
|
|
|
vec4 amb_accum = vec4(0.0);
|
|
vec4 spec_accum = vec4(0.0);
|
|
voxel_gi_compute(index1, vertex, normal, ref_vec, normal_mat, roughness * roughness, ambient_light, specular_light, spec_accum, amb_accum);
|
|
|
|
uint index2 = instances.data[instance_index].gi_offset >> 16;
|
|
|
|
if (index2 != 0xFFFF) {
|
|
voxel_gi_compute(index2, vertex, normal, ref_vec, normal_mat, roughness * roughness, ambient_light, specular_light, spec_accum, amb_accum);
|
|
}
|
|
|
|
if (amb_accum.a > 0.0) {
|
|
amb_accum.rgb /= amb_accum.a;
|
|
}
|
|
|
|
if (spec_accum.a > 0.0) {
|
|
spec_accum.rgb /= spec_accum.a;
|
|
}
|
|
|
|
specular_light = spec_accum.rgb;
|
|
ambient_light = amb_accum.rgb;
|
|
}
|
|
|
|
if (!sc_use_forward_gi && bool(instances.data[instance_index].flags & INSTANCE_FLAGS_USE_GI_BUFFERS)) { //use GI buffers
|
|
|
|
vec2 coord;
|
|
|
|
if (scene_data.gi_upscale_for_msaa) {
|
|
vec2 base_coord = screen_uv;
|
|
vec2 closest_coord = base_coord;
|
|
float closest_ang = dot(normal, textureLod(sampler2D(normal_roughness_buffer, material_samplers[SAMPLER_LINEAR_CLAMP]), base_coord, 0.0).xyz * 2.0 - 1.0);
|
|
|
|
for (int i = 0; i < 4; i++) {
|
|
const vec2 neighbours[4] = vec2[](vec2(-1, 0), vec2(1, 0), vec2(0, -1), vec2(0, 1));
|
|
vec2 neighbour_coord = base_coord + neighbours[i] * scene_data.screen_pixel_size;
|
|
float neighbour_ang = dot(normal, textureLod(sampler2D(normal_roughness_buffer, material_samplers[SAMPLER_LINEAR_CLAMP]), neighbour_coord, 0.0).xyz * 2.0 - 1.0);
|
|
if (neighbour_ang > closest_ang) {
|
|
closest_ang = neighbour_ang;
|
|
closest_coord = neighbour_coord;
|
|
}
|
|
}
|
|
|
|
coord = closest_coord;
|
|
|
|
} else {
|
|
coord = screen_uv;
|
|
}
|
|
|
|
vec4 buffer_ambient = textureLod(sampler2D(ambient_buffer, material_samplers[SAMPLER_LINEAR_CLAMP]), coord, 0.0);
|
|
vec4 buffer_reflection = textureLod(sampler2D(reflection_buffer, material_samplers[SAMPLER_LINEAR_CLAMP]), coord, 0.0);
|
|
|
|
ambient_light = mix(ambient_light, buffer_ambient.rgb, buffer_ambient.a);
|
|
specular_light = mix(specular_light, buffer_reflection.rgb, buffer_reflection.a);
|
|
}
|
|
#endif // !USE_LIGHTMAP
|
|
|
|
if (bool(scene_data.ss_effects_flags & SCREEN_SPACE_EFFECTS_FLAGS_USE_SSAO)) {
|
|
float ssao = texture(sampler2D(ao_buffer, material_samplers[SAMPLER_LINEAR_CLAMP]), screen_uv).r;
|
|
ao = min(ao, ssao);
|
|
ao_light_affect = mix(ao_light_affect, max(ao_light_affect, scene_data.ssao_light_affect), scene_data.ssao_ao_affect);
|
|
}
|
|
|
|
{ // process reflections
|
|
|
|
vec4 reflection_accum = vec4(0.0, 0.0, 0.0, 0.0);
|
|
vec4 ambient_accum = vec4(0.0, 0.0, 0.0, 0.0);
|
|
|
|
uint cluster_reflection_offset = cluster_offset + scene_data.cluster_type_size * 3;
|
|
|
|
uint item_min;
|
|
uint item_max;
|
|
uint item_from;
|
|
uint item_to;
|
|
|
|
cluster_get_item_range(cluster_reflection_offset + scene_data.max_cluster_element_count_div_32 + cluster_z, item_min, item_max, item_from, item_to);
|
|
|
|
#ifdef USE_SUBGROUPS
|
|
item_from = subgroupBroadcastFirst(subgroupMin(item_from));
|
|
item_to = subgroupBroadcastFirst(subgroupMax(item_to));
|
|
#endif
|
|
|
|
for (uint i = item_from; i < item_to; i++) {
|
|
uint mask = cluster_buffer.data[cluster_reflection_offset + i];
|
|
mask &= cluster_get_range_clip_mask(i, item_min, item_max);
|
|
#ifdef USE_SUBGROUPS
|
|
uint merged_mask = subgroupBroadcastFirst(subgroupOr(mask));
|
|
#else
|
|
uint merged_mask = mask;
|
|
#endif
|
|
|
|
while (merged_mask != 0) {
|
|
uint bit = findMSB(merged_mask);
|
|
merged_mask &= ~(1 << bit);
|
|
#ifdef USE_SUBGROUPS
|
|
if (((1 << bit) & mask) == 0) { //do not process if not originally here
|
|
continue;
|
|
}
|
|
#endif
|
|
uint reflection_index = 32 * i + bit;
|
|
|
|
if (!bool(reflections.data[reflection_index].mask & instances.data[instance_index].layer_mask)) {
|
|
continue; //not masked
|
|
}
|
|
#ifdef LIGHT_ANISOTROPY_USED
|
|
// https://google.github.io/filament/Filament.html#lighting/imagebasedlights/anisotropy
|
|
vec3 anisotropic_direction = anisotropy >= 0.0 ? binormal : tangent;
|
|
vec3 anisotropic_tangent = cross(anisotropic_direction, view);
|
|
vec3 anisotropic_normal = cross(anisotropic_tangent, anisotropic_direction);
|
|
vec3 bent_normal = normalize(mix(normal, anisotropic_normal, abs(anisotropy) * clamp(5.0 * roughness, 0.0, 1.0)));
|
|
#else
|
|
vec3 bent_normal = normal;
|
|
#endif
|
|
reflection_process(reflection_index, vertex, bent_normal, roughness, ambient_light, specular_light, ambient_accum, reflection_accum);
|
|
}
|
|
}
|
|
|
|
if (reflection_accum.a > 0.0) {
|
|
specular_light = reflection_accum.rgb / reflection_accum.a;
|
|
}
|
|
|
|
#if !defined(USE_LIGHTMAP)
|
|
if (ambient_accum.a > 0.0) {
|
|
ambient_light = ambient_accum.rgb / ambient_accum.a;
|
|
}
|
|
#endif
|
|
}
|
|
|
|
//finalize ambient light here
|
|
ambient_light *= albedo.rgb;
|
|
ambient_light *= ao;
|
|
|
|
// convert ao to direct light ao
|
|
ao = mix(1.0, ao, ao_light_affect);
|
|
|
|
if (bool(scene_data.ss_effects_flags & SCREEN_SPACE_EFFECTS_FLAGS_USE_SSIL)) {
|
|
vec4 ssil = textureLod(sampler2D(ssil_buffer, material_samplers[SAMPLER_LINEAR_CLAMP]), screen_uv, 0.0);
|
|
ambient_light *= 1.0 - ssil.a;
|
|
ambient_light += ssil.rgb * albedo.rgb;
|
|
}
|
|
|
|
//this saves some VGPRs
|
|
vec3 f0 = F0(metallic, specular, albedo);
|
|
|
|
{
|
|
#if defined(DIFFUSE_TOON)
|
|
//simplify for toon, as
|
|
specular_light *= specular * metallic * albedo * 2.0;
|
|
#else
|
|
|
|
// scales the specular reflections, needs to be computed before lighting happens,
|
|
// but after environment, GI, and reflection probes are added
|
|
// Environment brdf approximation (Lazarov 2013)
|
|
// see https://www.unrealengine.com/en-US/blog/physically-based-shading-on-mobile
|
|
const vec4 c0 = vec4(-1.0, -0.0275, -0.572, 0.022);
|
|
const vec4 c1 = vec4(1.0, 0.0425, 1.04, -0.04);
|
|
vec4 r = roughness * c0 + c1;
|
|
float ndotv = clamp(dot(normal, view), 0.0, 1.0);
|
|
float a004 = min(r.x * r.x, exp2(-9.28 * ndotv)) * r.x + r.y;
|
|
vec2 env = vec2(-1.04, 1.04) * a004 + r.zw;
|
|
|
|
specular_light *= env.x * f0 + env.y;
|
|
#endif
|
|
}
|
|
|
|
#endif //GI !defined(MODE_RENDER_DEPTH) && !defined(MODE_UNSHADED)
|
|
|
|
#if !defined(MODE_RENDER_DEPTH)
|
|
//this saves some VGPRs
|
|
uint orms = packUnorm4x8(vec4(ao, roughness, metallic, specular));
|
|
#endif
|
|
|
|
// LIGHTING
|
|
#if !defined(MODE_RENDER_DEPTH) && !defined(MODE_UNSHADED)
|
|
|
|
{ // Directional light.
|
|
|
|
// Do shadow and lighting in two passes to reduce register pressure.
|
|
#ifndef SHADOWS_DISABLED
|
|
uint shadow0 = 0;
|
|
uint shadow1 = 0;
|
|
|
|
for (uint i = 0; i < 8; i++) {
|
|
if (i >= scene_data.directional_light_count) {
|
|
break;
|
|
}
|
|
|
|
if (!bool(directional_lights.data[i].mask & instances.data[instance_index].layer_mask)) {
|
|
continue; //not masked
|
|
}
|
|
|
|
if (directional_lights.data[i].bake_mode == LIGHT_BAKE_STATIC && bool(instances.data[instance_index].flags & INSTANCE_FLAGS_USE_LIGHTMAP)) {
|
|
continue; // Statically baked light and object uses lightmap, skip
|
|
}
|
|
|
|
float shadow = 1.0;
|
|
|
|
if (directional_lights.data[i].shadow_enabled) {
|
|
float depth_z = -vertex.z;
|
|
vec3 light_dir = directional_lights.data[i].direction;
|
|
vec3 base_normal_bias = normalize(normal_interp) * (1.0 - max(0.0, dot(light_dir, -normalize(normal_interp))));
|
|
|
|
#define BIAS_FUNC(m_var, m_idx) \
|
|
m_var.xyz += light_dir * directional_lights.data[i].shadow_bias[m_idx]; \
|
|
vec3 normal_bias = base_normal_bias * directional_lights.data[i].shadow_normal_bias[m_idx]; \
|
|
normal_bias -= light_dir * dot(light_dir, normal_bias); \
|
|
m_var.xyz += normal_bias;
|
|
|
|
//version with soft shadows, more expensive
|
|
if (sc_use_directional_soft_shadows && directional_lights.data[i].softshadow_angle > 0) {
|
|
uint blend_count = 0;
|
|
const uint blend_max = directional_lights.data[i].blend_splits ? 2 : 1;
|
|
|
|
if (depth_z < directional_lights.data[i].shadow_split_offsets.x) {
|
|
vec4 v = vec4(vertex, 1.0);
|
|
|
|
BIAS_FUNC(v, 0)
|
|
|
|
vec4 pssm_coord = (directional_lights.data[i].shadow_matrix1 * v);
|
|
pssm_coord /= pssm_coord.w;
|
|
|
|
float range_pos = dot(directional_lights.data[i].direction, v.xyz);
|
|
float range_begin = directional_lights.data[i].shadow_range_begin.x;
|
|
float test_radius = (range_pos - range_begin) * directional_lights.data[i].softshadow_angle;
|
|
vec2 tex_scale = directional_lights.data[i].uv_scale1 * test_radius;
|
|
shadow = sample_directional_soft_shadow(directional_shadow_atlas, pssm_coord.xyz, tex_scale * directional_lights.data[i].soft_shadow_scale);
|
|
blend_count++;
|
|
}
|
|
|
|
if (blend_count < blend_max && depth_z < directional_lights.data[i].shadow_split_offsets.y) {
|
|
vec4 v = vec4(vertex, 1.0);
|
|
|
|
BIAS_FUNC(v, 1)
|
|
|
|
vec4 pssm_coord = (directional_lights.data[i].shadow_matrix2 * v);
|
|
pssm_coord /= pssm_coord.w;
|
|
|
|
float range_pos = dot(directional_lights.data[i].direction, v.xyz);
|
|
float range_begin = directional_lights.data[i].shadow_range_begin.y;
|
|
float test_radius = (range_pos - range_begin) * directional_lights.data[i].softshadow_angle;
|
|
vec2 tex_scale = directional_lights.data[i].uv_scale2 * test_radius;
|
|
float s = sample_directional_soft_shadow(directional_shadow_atlas, pssm_coord.xyz, tex_scale * directional_lights.data[i].soft_shadow_scale);
|
|
|
|
if (blend_count == 0) {
|
|
shadow = s;
|
|
} else {
|
|
//blend
|
|
float blend = smoothstep(0.0, directional_lights.data[i].shadow_split_offsets.x, depth_z);
|
|
shadow = mix(shadow, s, blend);
|
|
}
|
|
|
|
blend_count++;
|
|
}
|
|
|
|
if (blend_count < blend_max && depth_z < directional_lights.data[i].shadow_split_offsets.z) {
|
|
vec4 v = vec4(vertex, 1.0);
|
|
|
|
BIAS_FUNC(v, 2)
|
|
|
|
vec4 pssm_coord = (directional_lights.data[i].shadow_matrix3 * v);
|
|
pssm_coord /= pssm_coord.w;
|
|
|
|
float range_pos = dot(directional_lights.data[i].direction, v.xyz);
|
|
float range_begin = directional_lights.data[i].shadow_range_begin.z;
|
|
float test_radius = (range_pos - range_begin) * directional_lights.data[i].softshadow_angle;
|
|
vec2 tex_scale = directional_lights.data[i].uv_scale3 * test_radius;
|
|
float s = sample_directional_soft_shadow(directional_shadow_atlas, pssm_coord.xyz, tex_scale * directional_lights.data[i].soft_shadow_scale);
|
|
|
|
if (blend_count == 0) {
|
|
shadow = s;
|
|
} else {
|
|
//blend
|
|
float blend = smoothstep(directional_lights.data[i].shadow_split_offsets.x, directional_lights.data[i].shadow_split_offsets.y, depth_z);
|
|
shadow = mix(shadow, s, blend);
|
|
}
|
|
|
|
blend_count++;
|
|
}
|
|
|
|
if (blend_count < blend_max) {
|
|
vec4 v = vec4(vertex, 1.0);
|
|
|
|
BIAS_FUNC(v, 3)
|
|
|
|
vec4 pssm_coord = (directional_lights.data[i].shadow_matrix4 * v);
|
|
pssm_coord /= pssm_coord.w;
|
|
|
|
float range_pos = dot(directional_lights.data[i].direction, v.xyz);
|
|
float range_begin = directional_lights.data[i].shadow_range_begin.w;
|
|
float test_radius = (range_pos - range_begin) * directional_lights.data[i].softshadow_angle;
|
|
vec2 tex_scale = directional_lights.data[i].uv_scale4 * test_radius;
|
|
float s = sample_directional_soft_shadow(directional_shadow_atlas, pssm_coord.xyz, tex_scale * directional_lights.data[i].soft_shadow_scale);
|
|
|
|
if (blend_count == 0) {
|
|
shadow = s;
|
|
} else {
|
|
//blend
|
|
float blend = smoothstep(directional_lights.data[i].shadow_split_offsets.y, directional_lights.data[i].shadow_split_offsets.z, depth_z);
|
|
shadow = mix(shadow, s, blend);
|
|
}
|
|
}
|
|
|
|
} else { //no soft shadows
|
|
|
|
vec4 pssm_coord;
|
|
float blur_factor;
|
|
|
|
if (depth_z < directional_lights.data[i].shadow_split_offsets.x) {
|
|
vec4 v = vec4(vertex, 1.0);
|
|
|
|
BIAS_FUNC(v, 0)
|
|
|
|
pssm_coord = (directional_lights.data[i].shadow_matrix1 * v);
|
|
blur_factor = 1.0;
|
|
} else if (depth_z < directional_lights.data[i].shadow_split_offsets.y) {
|
|
vec4 v = vec4(vertex, 1.0);
|
|
|
|
BIAS_FUNC(v, 1)
|
|
|
|
pssm_coord = (directional_lights.data[i].shadow_matrix2 * v);
|
|
// Adjust shadow blur with reference to the first split to reduce discrepancy between shadow splits.
|
|
blur_factor = directional_lights.data[i].shadow_split_offsets.x / directional_lights.data[i].shadow_split_offsets.y;
|
|
} else if (depth_z < directional_lights.data[i].shadow_split_offsets.z) {
|
|
vec4 v = vec4(vertex, 1.0);
|
|
|
|
BIAS_FUNC(v, 2)
|
|
|
|
pssm_coord = (directional_lights.data[i].shadow_matrix3 * v);
|
|
// Adjust shadow blur with reference to the first split to reduce discrepancy between shadow splits.
|
|
blur_factor = directional_lights.data[i].shadow_split_offsets.x / directional_lights.data[i].shadow_split_offsets.z;
|
|
} else {
|
|
vec4 v = vec4(vertex, 1.0);
|
|
|
|
BIAS_FUNC(v, 3)
|
|
|
|
pssm_coord = (directional_lights.data[i].shadow_matrix4 * v);
|
|
// Adjust shadow blur with reference to the first split to reduce discrepancy between shadow splits.
|
|
blur_factor = directional_lights.data[i].shadow_split_offsets.x / directional_lights.data[i].shadow_split_offsets.w;
|
|
}
|
|
|
|
pssm_coord /= pssm_coord.w;
|
|
|
|
shadow = sample_directional_pcf_shadow(directional_shadow_atlas, scene_data.directional_shadow_pixel_size * directional_lights.data[i].soft_shadow_scale * blur_factor, pssm_coord);
|
|
|
|
if (directional_lights.data[i].blend_splits) {
|
|
float pssm_blend;
|
|
float blur_factor2;
|
|
|
|
if (depth_z < directional_lights.data[i].shadow_split_offsets.x) {
|
|
vec4 v = vec4(vertex, 1.0);
|
|
BIAS_FUNC(v, 1)
|
|
pssm_coord = (directional_lights.data[i].shadow_matrix2 * v);
|
|
pssm_blend = smoothstep(0.0, directional_lights.data[i].shadow_split_offsets.x, depth_z);
|
|
// Adjust shadow blur with reference to the first split to reduce discrepancy between shadow splits.
|
|
blur_factor2 = directional_lights.data[i].shadow_split_offsets.x / directional_lights.data[i].shadow_split_offsets.y;
|
|
} else if (depth_z < directional_lights.data[i].shadow_split_offsets.y) {
|
|
vec4 v = vec4(vertex, 1.0);
|
|
BIAS_FUNC(v, 2)
|
|
pssm_coord = (directional_lights.data[i].shadow_matrix3 * v);
|
|
pssm_blend = smoothstep(directional_lights.data[i].shadow_split_offsets.x, directional_lights.data[i].shadow_split_offsets.y, depth_z);
|
|
// Adjust shadow blur with reference to the first split to reduce discrepancy between shadow splits.
|
|
blur_factor2 = directional_lights.data[i].shadow_split_offsets.x / directional_lights.data[i].shadow_split_offsets.z;
|
|
} else if (depth_z < directional_lights.data[i].shadow_split_offsets.z) {
|
|
vec4 v = vec4(vertex, 1.0);
|
|
BIAS_FUNC(v, 3)
|
|
pssm_coord = (directional_lights.data[i].shadow_matrix4 * v);
|
|
pssm_blend = smoothstep(directional_lights.data[i].shadow_split_offsets.y, directional_lights.data[i].shadow_split_offsets.z, depth_z);
|
|
// Adjust shadow blur with reference to the first split to reduce discrepancy between shadow splits.
|
|
blur_factor2 = directional_lights.data[i].shadow_split_offsets.x / directional_lights.data[i].shadow_split_offsets.w;
|
|
} else {
|
|
pssm_blend = 0.0; //if no blend, same coord will be used (divide by z will result in same value, and already cached)
|
|
blur_factor2 = 1.0;
|
|
}
|
|
|
|
pssm_coord /= pssm_coord.w;
|
|
|
|
float shadow2 = sample_directional_pcf_shadow(directional_shadow_atlas, scene_data.directional_shadow_pixel_size * directional_lights.data[i].soft_shadow_scale * blur_factor2, pssm_coord);
|
|
shadow = mix(shadow, shadow2, pssm_blend);
|
|
}
|
|
}
|
|
|
|
shadow = mix(shadow, 1.0, smoothstep(directional_lights.data[i].fade_from, directional_lights.data[i].fade_to, vertex.z)); //done with negative values for performance
|
|
|
|
#undef BIAS_FUNC
|
|
} // shadows
|
|
|
|
if (i < 4) {
|
|
shadow0 |= uint(clamp(shadow * 255.0, 0.0, 255.0)) << (i * 8);
|
|
} else {
|
|
shadow1 |= uint(clamp(shadow * 255.0, 0.0, 255.0)) << ((i - 4) * 8);
|
|
}
|
|
}
|
|
#endif // SHADOWS_DISABLED
|
|
|
|
for (uint i = 0; i < 8; i++) {
|
|
if (i >= scene_data.directional_light_count) {
|
|
break;
|
|
}
|
|
|
|
if (!bool(directional_lights.data[i].mask & instances.data[instance_index].layer_mask)) {
|
|
continue; //not masked
|
|
}
|
|
|
|
#ifdef LIGHT_TRANSMITTANCE_USED
|
|
float transmittance_z = transmittance_depth;
|
|
|
|
if (directional_lights.data[i].shadow_enabled) {
|
|
float depth_z = -vertex.z;
|
|
|
|
if (depth_z < directional_lights.data[i].shadow_split_offsets.x) {
|
|
vec4 trans_vertex = vec4(vertex - normalize(normal_interp) * directional_lights.data[i].shadow_transmittance_bias.x, 1.0);
|
|
vec4 trans_coord = directional_lights.data[i].shadow_matrix1 * trans_vertex;
|
|
trans_coord /= trans_coord.w;
|
|
|
|
float shadow_z = textureLod(sampler2D(directional_shadow_atlas, material_samplers[SAMPLER_LINEAR_CLAMP]), trans_coord.xy, 0.0).r;
|
|
shadow_z *= directional_lights.data[i].shadow_z_range.x;
|
|
float z = trans_coord.z * directional_lights.data[i].shadow_z_range.x;
|
|
|
|
transmittance_z = z - shadow_z;
|
|
} else if (depth_z < directional_lights.data[i].shadow_split_offsets.y) {
|
|
vec4 trans_vertex = vec4(vertex - normalize(normal_interp) * directional_lights.data[i].shadow_transmittance_bias.y, 1.0);
|
|
vec4 trans_coord = directional_lights.data[i].shadow_matrix2 * trans_vertex;
|
|
trans_coord /= trans_coord.w;
|
|
|
|
float shadow_z = textureLod(sampler2D(directional_shadow_atlas, material_samplers[SAMPLER_LINEAR_CLAMP]), trans_coord.xy, 0.0).r;
|
|
shadow_z *= directional_lights.data[i].shadow_z_range.y;
|
|
float z = trans_coord.z * directional_lights.data[i].shadow_z_range.y;
|
|
|
|
transmittance_z = z - shadow_z;
|
|
} else if (depth_z < directional_lights.data[i].shadow_split_offsets.z) {
|
|
vec4 trans_vertex = vec4(vertex - normalize(normal_interp) * directional_lights.data[i].shadow_transmittance_bias.z, 1.0);
|
|
vec4 trans_coord = directional_lights.data[i].shadow_matrix3 * trans_vertex;
|
|
trans_coord /= trans_coord.w;
|
|
|
|
float shadow_z = textureLod(sampler2D(directional_shadow_atlas, material_samplers[SAMPLER_LINEAR_CLAMP]), trans_coord.xy, 0.0).r;
|
|
shadow_z *= directional_lights.data[i].shadow_z_range.z;
|
|
float z = trans_coord.z * directional_lights.data[i].shadow_z_range.z;
|
|
|
|
transmittance_z = z - shadow_z;
|
|
|
|
} else {
|
|
vec4 trans_vertex = vec4(vertex - normalize(normal_interp) * directional_lights.data[i].shadow_transmittance_bias.w, 1.0);
|
|
vec4 trans_coord = directional_lights.data[i].shadow_matrix4 * trans_vertex;
|
|
trans_coord /= trans_coord.w;
|
|
|
|
float shadow_z = textureLod(sampler2D(directional_shadow_atlas, material_samplers[SAMPLER_LINEAR_CLAMP]), trans_coord.xy, 0.0).r;
|
|
shadow_z *= directional_lights.data[i].shadow_z_range.w;
|
|
float z = trans_coord.z * directional_lights.data[i].shadow_z_range.w;
|
|
|
|
transmittance_z = z - shadow_z;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
float shadow = 1.0;
|
|
#ifndef SHADOWS_DISABLED
|
|
if (i < 4) {
|
|
shadow = float(shadow0 >> (i * 8) & 0xFF) / 255.0;
|
|
} else {
|
|
shadow = float(shadow1 >> ((i - 4) * 8) & 0xFF) / 255.0;
|
|
}
|
|
#endif
|
|
|
|
blur_shadow(shadow);
|
|
|
|
float size_A = sc_use_light_soft_shadows ? directional_lights.data[i].size : 0.0;
|
|
|
|
light_compute(normal, directional_lights.data[i].direction, normalize(view), size_A, directional_lights.data[i].color * directional_lights.data[i].energy, shadow, f0, orms, 1.0, albedo, alpha,
|
|
#ifdef LIGHT_BACKLIGHT_USED
|
|
backlight,
|
|
#endif
|
|
#ifdef LIGHT_TRANSMITTANCE_USED
|
|
transmittance_color,
|
|
transmittance_depth,
|
|
transmittance_boost,
|
|
transmittance_z,
|
|
#endif
|
|
#ifdef LIGHT_RIM_USED
|
|
rim, rim_tint,
|
|
#endif
|
|
#ifdef LIGHT_CLEARCOAT_USED
|
|
clearcoat, clearcoat_roughness, normalize(normal_interp),
|
|
#endif
|
|
#ifdef LIGHT_ANISOTROPY_USED
|
|
binormal,
|
|
tangent, anisotropy,
|
|
#endif
|
|
diffuse_light,
|
|
specular_light);
|
|
}
|
|
}
|
|
|
|
{ //omni lights
|
|
|
|
uint cluster_omni_offset = cluster_offset;
|
|
|
|
uint item_min;
|
|
uint item_max;
|
|
uint item_from;
|
|
uint item_to;
|
|
|
|
cluster_get_item_range(cluster_omni_offset + scene_data.max_cluster_element_count_div_32 + cluster_z, item_min, item_max, item_from, item_to);
|
|
|
|
#ifdef USE_SUBGROUPS
|
|
item_from = subgroupBroadcastFirst(subgroupMin(item_from));
|
|
item_to = subgroupBroadcastFirst(subgroupMax(item_to));
|
|
#endif
|
|
|
|
for (uint i = item_from; i < item_to; i++) {
|
|
uint mask = cluster_buffer.data[cluster_omni_offset + i];
|
|
mask &= cluster_get_range_clip_mask(i, item_min, item_max);
|
|
#ifdef USE_SUBGROUPS
|
|
uint merged_mask = subgroupBroadcastFirst(subgroupOr(mask));
|
|
#else
|
|
uint merged_mask = mask;
|
|
#endif
|
|
|
|
while (merged_mask != 0) {
|
|
uint bit = findMSB(merged_mask);
|
|
merged_mask &= ~(1 << bit);
|
|
#ifdef USE_SUBGROUPS
|
|
if (((1 << bit) & mask) == 0) { //do not process if not originally here
|
|
continue;
|
|
}
|
|
#endif
|
|
uint light_index = 32 * i + bit;
|
|
|
|
if (!bool(omni_lights.data[light_index].mask & instances.data[instance_index].layer_mask)) {
|
|
continue; //not masked
|
|
}
|
|
|
|
if (omni_lights.data[light_index].bake_mode == LIGHT_BAKE_STATIC && bool(instances.data[instance_index].flags & INSTANCE_FLAGS_USE_LIGHTMAP)) {
|
|
continue; // Statically baked light and object uses lightmap, skip
|
|
}
|
|
|
|
float shadow = light_process_omni_shadow(light_index, vertex, normal);
|
|
|
|
shadow = blur_shadow(shadow);
|
|
|
|
light_process_omni(light_index, vertex, view, normal, vertex_ddx, vertex_ddy, f0, orms, shadow, albedo, alpha,
|
|
#ifdef LIGHT_BACKLIGHT_USED
|
|
backlight,
|
|
#endif
|
|
#ifdef LIGHT_TRANSMITTANCE_USED
|
|
transmittance_color,
|
|
transmittance_depth,
|
|
transmittance_boost,
|
|
#endif
|
|
#ifdef LIGHT_RIM_USED
|
|
rim,
|
|
rim_tint,
|
|
#endif
|
|
#ifdef LIGHT_CLEARCOAT_USED
|
|
clearcoat, clearcoat_roughness, normalize(normal_interp),
|
|
#endif
|
|
#ifdef LIGHT_ANISOTROPY_USED
|
|
tangent, binormal, anisotropy,
|
|
#endif
|
|
diffuse_light, specular_light);
|
|
}
|
|
}
|
|
}
|
|
|
|
{ //spot lights
|
|
|
|
uint cluster_spot_offset = cluster_offset + scene_data.cluster_type_size;
|
|
|
|
uint item_min;
|
|
uint item_max;
|
|
uint item_from;
|
|
uint item_to;
|
|
|
|
cluster_get_item_range(cluster_spot_offset + scene_data.max_cluster_element_count_div_32 + cluster_z, item_min, item_max, item_from, item_to);
|
|
|
|
#ifdef USE_SUBGROUPS
|
|
item_from = subgroupBroadcastFirst(subgroupMin(item_from));
|
|
item_to = subgroupBroadcastFirst(subgroupMax(item_to));
|
|
#endif
|
|
|
|
for (uint i = item_from; i < item_to; i++) {
|
|
uint mask = cluster_buffer.data[cluster_spot_offset + i];
|
|
mask &= cluster_get_range_clip_mask(i, item_min, item_max);
|
|
#ifdef USE_SUBGROUPS
|
|
uint merged_mask = subgroupBroadcastFirst(subgroupOr(mask));
|
|
#else
|
|
uint merged_mask = mask;
|
|
#endif
|
|
|
|
while (merged_mask != 0) {
|
|
uint bit = findMSB(merged_mask);
|
|
merged_mask &= ~(1 << bit);
|
|
#ifdef USE_SUBGROUPS
|
|
if (((1 << bit) & mask) == 0) { //do not process if not originally here
|
|
continue;
|
|
}
|
|
#endif
|
|
|
|
uint light_index = 32 * i + bit;
|
|
|
|
if (!bool(spot_lights.data[light_index].mask & instances.data[instance_index].layer_mask)) {
|
|
continue; //not masked
|
|
}
|
|
|
|
if (spot_lights.data[light_index].bake_mode == LIGHT_BAKE_STATIC && bool(instances.data[instance_index].flags & INSTANCE_FLAGS_USE_LIGHTMAP)) {
|
|
continue; // Statically baked light and object uses lightmap, skip
|
|
}
|
|
|
|
float shadow = light_process_spot_shadow(light_index, vertex, normal);
|
|
|
|
shadow = blur_shadow(shadow);
|
|
|
|
light_process_spot(light_index, vertex, view, normal, vertex_ddx, vertex_ddy, f0, orms, shadow, albedo, alpha,
|
|
#ifdef LIGHT_BACKLIGHT_USED
|
|
backlight,
|
|
#endif
|
|
#ifdef LIGHT_TRANSMITTANCE_USED
|
|
transmittance_color,
|
|
transmittance_depth,
|
|
transmittance_boost,
|
|
#endif
|
|
#ifdef LIGHT_RIM_USED
|
|
rim,
|
|
rim_tint,
|
|
#endif
|
|
#ifdef LIGHT_CLEARCOAT_USED
|
|
clearcoat, clearcoat_roughness, normalize(normal_interp),
|
|
#endif
|
|
#ifdef LIGHT_ANISOTROPY_USED
|
|
tangent,
|
|
binormal, anisotropy,
|
|
#endif
|
|
diffuse_light, specular_light);
|
|
}
|
|
}
|
|
}
|
|
|
|
#ifdef USE_SHADOW_TO_OPACITY
|
|
alpha = min(alpha, clamp(length(ambient_light), 0.0, 1.0));
|
|
|
|
#if defined(ALPHA_SCISSOR_USED)
|
|
if (alpha < alpha_scissor) {
|
|
discard;
|
|
}
|
|
#endif // ALPHA_SCISSOR_USED
|
|
|
|
#ifdef USE_OPAQUE_PREPASS
|
|
|
|
if (alpha < scene_data.opaque_prepass_threshold) {
|
|
discard;
|
|
}
|
|
|
|
#endif // USE_OPAQUE_PREPASS
|
|
|
|
#endif // USE_SHADOW_TO_OPACITY
|
|
|
|
#endif //!defined(MODE_RENDER_DEPTH) && !defined(MODE_UNSHADED)
|
|
|
|
#ifdef MODE_RENDER_DEPTH
|
|
|
|
#ifdef MODE_RENDER_SDF
|
|
|
|
{
|
|
vec3 local_pos = (scene_data.sdf_to_bounds * vec4(vertex, 1.0)).xyz;
|
|
ivec3 grid_pos = scene_data.sdf_offset + ivec3(local_pos * vec3(scene_data.sdf_size));
|
|
|
|
uint albedo16 = 0x1; //solid flag
|
|
albedo16 |= clamp(uint(albedo.r * 31.0), 0, 31) << 11;
|
|
albedo16 |= clamp(uint(albedo.g * 31.0), 0, 31) << 6;
|
|
albedo16 |= clamp(uint(albedo.b * 31.0), 0, 31) << 1;
|
|
|
|
imageStore(albedo_volume_grid, grid_pos, uvec4(albedo16));
|
|
|
|
uint facing_bits = 0;
|
|
const vec3 aniso_dir[6] = vec3[](
|
|
vec3(1, 0, 0),
|
|
vec3(0, 1, 0),
|
|
vec3(0, 0, 1),
|
|
vec3(-1, 0, 0),
|
|
vec3(0, -1, 0),
|
|
vec3(0, 0, -1));
|
|
|
|
vec3 cam_normal = mat3(scene_data.inv_view_matrix) * normalize(normal_interp);
|
|
|
|
float closest_dist = -1e20;
|
|
|
|
for (uint i = 0; i < 6; i++) {
|
|
float d = dot(cam_normal, aniso_dir[i]);
|
|
if (d > closest_dist) {
|
|
closest_dist = d;
|
|
facing_bits = (1 << i);
|
|
}
|
|
}
|
|
|
|
#ifdef MOLTENVK_USED
|
|
imageStore(geom_facing_grid, grid_pos, uvec4(imageLoad(geom_facing_grid, grid_pos).r | facing_bits)); //store facing bits
|
|
#else
|
|
imageAtomicOr(geom_facing_grid, grid_pos, facing_bits); //store facing bits
|
|
#endif
|
|
|
|
if (length(emission) > 0.001) {
|
|
float lumas[6];
|
|
vec3 light_total = vec3(0);
|
|
|
|
for (int i = 0; i < 6; i++) {
|
|
float strength = max(0.0, dot(cam_normal, aniso_dir[i]));
|
|
vec3 light = emission * strength;
|
|
light_total += light;
|
|
lumas[i] = max(light.r, max(light.g, light.b));
|
|
}
|
|
|
|
float luma_total = max(light_total.r, max(light_total.g, light_total.b));
|
|
|
|
uint light_aniso = 0;
|
|
|
|
for (int i = 0; i < 6; i++) {
|
|
light_aniso |= min(31, uint((lumas[i] / luma_total) * 31.0)) << (i * 5);
|
|
}
|
|
|
|
//compress to RGBE9995 to save space
|
|
|
|
const float pow2to9 = 512.0f;
|
|
const float B = 15.0f;
|
|
const float N = 9.0f;
|
|
const float LN2 = 0.6931471805599453094172321215;
|
|
|
|
float cRed = clamp(light_total.r, 0.0, 65408.0);
|
|
float cGreen = clamp(light_total.g, 0.0, 65408.0);
|
|
float cBlue = clamp(light_total.b, 0.0, 65408.0);
|
|
|
|
float cMax = max(cRed, max(cGreen, cBlue));
|
|
|
|
float expp = max(-B - 1.0f, floor(log(cMax) / LN2)) + 1.0f + B;
|
|
|
|
float sMax = floor((cMax / pow(2.0f, expp - B - N)) + 0.5f);
|
|
|
|
float exps = expp + 1.0f;
|
|
|
|
if (0.0 <= sMax && sMax < pow2to9) {
|
|
exps = expp;
|
|
}
|
|
|
|
float sRed = floor((cRed / pow(2.0f, exps - B - N)) + 0.5f);
|
|
float sGreen = floor((cGreen / pow(2.0f, exps - B - N)) + 0.5f);
|
|
float sBlue = floor((cBlue / pow(2.0f, exps - B - N)) + 0.5f);
|
|
//store as 8985 to have 2 extra neighbour bits
|
|
uint light_rgbe = ((uint(sRed) & 0x1FF) >> 1) | ((uint(sGreen) & 0x1FF) << 8) | (((uint(sBlue) & 0x1FF) >> 1) << 17) | ((uint(exps) & 0x1F) << 25);
|
|
|
|
imageStore(emission_grid, grid_pos, uvec4(light_rgbe));
|
|
imageStore(emission_aniso_grid, grid_pos, uvec4(light_aniso));
|
|
}
|
|
}
|
|
|
|
#endif
|
|
|
|
#ifdef MODE_RENDER_MATERIAL
|
|
|
|
albedo_output_buffer.rgb = albedo;
|
|
albedo_output_buffer.a = alpha;
|
|
|
|
normal_output_buffer.rgb = normal * 0.5 + 0.5;
|
|
normal_output_buffer.a = 0.0;
|
|
depth_output_buffer.r = -vertex.z;
|
|
|
|
orm_output_buffer.r = ao;
|
|
orm_output_buffer.g = roughness;
|
|
orm_output_buffer.b = metallic;
|
|
orm_output_buffer.a = sss_strength;
|
|
|
|
emission_output_buffer.rgb = emission;
|
|
emission_output_buffer.a = 0.0;
|
|
#endif
|
|
|
|
#ifdef MODE_RENDER_NORMAL_ROUGHNESS
|
|
normal_roughness_output_buffer = vec4(normal * 0.5 + 0.5, roughness);
|
|
|
|
#ifdef MODE_RENDER_VOXEL_GI
|
|
if (bool(instances.data[instance_index].flags & INSTANCE_FLAGS_USE_VOXEL_GI)) { // process voxel_gi_instances
|
|
uint index1 = instances.data[instance_index].gi_offset & 0xFFFF;
|
|
uint index2 = instances.data[instance_index].gi_offset >> 16;
|
|
voxel_gi_buffer.x = index1 & 0xFF;
|
|
voxel_gi_buffer.y = index2 & 0xFF;
|
|
} else {
|
|
voxel_gi_buffer.x = 0xFF;
|
|
voxel_gi_buffer.y = 0xFF;
|
|
}
|
|
#endif
|
|
|
|
#endif //MODE_RENDER_NORMAL_ROUGHNESS
|
|
|
|
//nothing happens, so a tree-ssa optimizer will result in no fragment shader :)
|
|
#else
|
|
|
|
// multiply by albedo
|
|
diffuse_light *= albedo; // ambient must be multiplied by albedo at the end
|
|
|
|
// apply direct light AO
|
|
ao = unpackUnorm4x8(orms).x;
|
|
specular_light *= ao;
|
|
diffuse_light *= ao;
|
|
|
|
// apply metallic
|
|
metallic = unpackUnorm4x8(orms).z;
|
|
diffuse_light *= 1.0 - metallic;
|
|
ambient_light *= 1.0 - metallic;
|
|
|
|
//restore fog
|
|
fog = vec4(unpackHalf2x16(fog_rg), unpackHalf2x16(fog_ba));
|
|
|
|
#ifdef MODE_SEPARATE_SPECULAR
|
|
|
|
#ifdef MODE_UNSHADED
|
|
diffuse_buffer = vec4(albedo.rgb, 0.0);
|
|
specular_buffer = vec4(0.0);
|
|
|
|
#else
|
|
|
|
#ifdef SSS_MODE_SKIN
|
|
sss_strength = -sss_strength;
|
|
#endif
|
|
diffuse_buffer = vec4(emission + diffuse_light + ambient_light, sss_strength);
|
|
specular_buffer = vec4(specular_light, metallic);
|
|
#endif
|
|
|
|
diffuse_buffer.rgb = mix(diffuse_buffer.rgb, fog.rgb, fog.a);
|
|
specular_buffer.rgb = mix(specular_buffer.rgb, vec3(0.0), fog.a);
|
|
|
|
#else //MODE_SEPARATE_SPECULAR
|
|
|
|
#ifdef MODE_UNSHADED
|
|
frag_color = vec4(albedo, alpha);
|
|
#else
|
|
frag_color = vec4(emission + ambient_light + diffuse_light + specular_light, alpha);
|
|
//frag_color = vec4(1.0);
|
|
#endif //USE_NO_SHADING
|
|
|
|
// Draw "fixed" fog before volumetric fog to ensure volumetric fog can appear in front of the sky.
|
|
frag_color.rgb = mix(frag_color.rgb, fog.rgb, fog.a);
|
|
|
|
#endif //MODE_SEPARATE_SPECULAR
|
|
|
|
#endif //MODE_RENDER_DEPTH
|
|
}
|