187 lines
4.6 KiB
GLSL
187 lines
4.6 KiB
GLSL
/* clang-format off */
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[vertex]
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#version 450
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VERSION_DEFINES
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layout(location = 0) out vec2 uv_interp;
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/* clang-format on */
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layout(push_constant, binding = 1, std430) uniform Params {
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mat3 orientation;
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vec4 proj;
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vec4 position_multiplier;
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float time;
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}
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params;
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void main() {
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vec2 base_arr[4] = vec2[](vec2(-1.0, -1.0), vec2(-1.0, 1.0), vec2(1.0, 1.0), vec2(1.0, -1.0));
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uv_interp = base_arr[gl_VertexIndex];
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gl_Position = vec4(uv_interp, 1.0, 1.0);
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}
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/* clang-format off */
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[fragment]
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#version 450
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VERSION_DEFINES
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#define M_PI 3.14159265359
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layout(location = 0) in vec2 uv_interp;
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/* clang-format on */
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layout(push_constant, binding = 1, std430) uniform Params {
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mat3 orientation;
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vec4 proj;
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vec4 position_multiplier;
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float time; //TODO consider adding vec2 screen res, and float radiance size
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}
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params;
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#define SAMPLER_NEAREST_CLAMP 0
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#define SAMPLER_LINEAR_CLAMP 1
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#define SAMPLER_NEAREST_WITH_MIPMAPS_CLAMP 2
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#define SAMPLER_LINEAR_WITH_MIPMAPS_CLAMP 3
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#define SAMPLER_NEAREST_WITH_MIPMAPS_ANISOTROPIC_CLAMP 4
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#define SAMPLER_LINEAR_WITH_MIPMAPS_ANISOTROPIC_CLAMP 5
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#define SAMPLER_NEAREST_REPEAT 6
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#define SAMPLER_LINEAR_REPEAT 7
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#define SAMPLER_NEAREST_WITH_MIPMAPS_REPEAT 8
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#define SAMPLER_LINEAR_WITH_MIPMAPS_REPEAT 9
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#define SAMPLER_NEAREST_WITH_MIPMAPS_ANISOTROPIC_REPEAT 10
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#define SAMPLER_LINEAR_WITH_MIPMAPS_ANISOTROPIC_REPEAT 11
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layout(set = 0, binding = 0) uniform sampler material_samplers[12];
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#ifdef USE_MATERIAL_UNIFORMS
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layout(set = 1, binding = 0, std140) uniform MaterialUniforms{
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/* clang-format off */
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MATERIAL_UNIFORMS
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/* clang-format on */
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} material;
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#endif
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layout(set = 2, binding = 0) uniform textureCube radiance;
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#ifdef USE_CUBEMAP_PASS
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layout(set = 2, binding = 1) uniform textureCube half_res;
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layout(set = 2, binding = 2) uniform textureCube quarter_res;
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#else
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layout(set = 2, binding = 1) uniform texture2D half_res;
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layout(set = 2, binding = 2) uniform texture2D quarter_res;
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#endif
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#ifdef USE_CUBEMAP_PASS
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#define AT_CUBEMAP_PASS true
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#else
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#define AT_CUBEMAP_PASS false
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#endif
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#ifdef USE_HALF_RES_PASS
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#define AT_HALF_RES_PASS true
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#else
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#define AT_HALF_RES_PASS false
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#endif
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#ifdef USE_QUARTER_RES_PASS
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#define AT_QUARTER_RES_PASS true
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#else
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#define AT_QUARTER_RES_PASS false
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#endif
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struct DirectionalLightData {
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vec3 direction;
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float energy;
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vec3 color;
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bool enabled;
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};
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layout(set = 3, binding = 0, std140) uniform DirectionalLights {
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DirectionalLightData data[MAX_DIRECTIONAL_LIGHT_DATA_STRUCTS];
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}
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directional_lights;
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/* clang-format off */
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FRAGMENT_SHADER_GLOBALS
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/* clang-format on */
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layout(location = 0) out vec4 frag_color;
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void main() {
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vec3 cube_normal;
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cube_normal.z = -1.0;
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cube_normal.x = (cube_normal.z * (-uv_interp.x - params.proj.x)) / params.proj.y;
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cube_normal.y = -(cube_normal.z * (-uv_interp.y - params.proj.z)) / params.proj.w;
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cube_normal = mat3(params.orientation) * cube_normal;
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cube_normal.z = -cube_normal.z;
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cube_normal = normalize(cube_normal);
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vec2 uv = uv_interp * 0.5 + 0.5;
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vec2 panorama_coords = vec2(atan(cube_normal.x, cube_normal.z), acos(cube_normal.y));
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if (panorama_coords.x < 0.0) {
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panorama_coords.x += M_PI * 2.0;
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}
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panorama_coords /= vec2(M_PI * 2.0, M_PI);
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vec3 color = vec3(0.0, 0.0, 0.0);
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float alpha = 1.0; // Only available to subpasses
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vec4 half_res_color = vec4(1.0);
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vec4 quarter_res_color = vec4(1.0);
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#ifdef USE_CUBEMAP_PASS
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vec3 inverted_cube_normal = cube_normal;
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inverted_cube_normal.z *= -1.0;
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#ifdef USES_HALF_RES_COLOR
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half_res_color = texture(samplerCube(half_res, material_samplers[SAMPLER_LINEAR_WITH_MIPMAPS_CLAMP]), inverted_cube_normal);
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#endif
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#ifdef USES_QUARTER_RES_COLOR
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quarter_res_color = texture(samplerCube(quarter_res, material_samplers[SAMPLER_LINEAR_WITH_MIPMAPS_CLAMP]), inverted_cube_normal);
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#endif
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#else
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#ifdef USES_HALF_RES_COLOR
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half_res_color = textureLod(sampler2D(half_res, material_samplers[SAMPLER_LINEAR_CLAMP]), uv, 0.0);
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#endif
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#ifdef USES_QUARTER_RES_COLOR
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quarter_res_color = textureLod(sampler2D(quarter_res, material_samplers[SAMPLER_LINEAR_CLAMP]), uv, 0.0);
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#endif
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#endif
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// unused, just here to make our compiler happy, make sure we don't execute any light code the user adds in..
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#ifndef REALLYINCLUDETHIS
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{
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/* clang-format off */
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LIGHT_SHADER_CODE
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/* clang-format on */
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}
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#endif
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{
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/* clang-format off */
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FRAGMENT_SHADER_CODE
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/* clang-format on */
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}
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frag_color.rgb = color * params.position_multiplier.w;
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frag_color.a = alpha;
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// Blending is disabled for Sky, so alpha doesn't blend
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// alpha is used for subsurface scattering so make sure it doesn't get applied to Sky
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if (!AT_CUBEMAP_PASS && !AT_HALF_RES_PASS && !AT_QUARTER_RES_PASS) {
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frag_color.a = 0.0;
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}
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}
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