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virtualx-engine/drivers/gles2/shaders/material.glsl
Pedro J. Estébanez ffe5ecd67d Rename misleading define 
The macro USE_LIGHT_SHADOW_COLOR actually was being defined when the shader used SHADOW (the output shadow color), not the shadow color set for the light so it's better named USE_OUTPUT_SHADOW_COLOR. In 3D there's not that difference but renaming as well for consistency.

(cherry picked from commit b69e422af9)
2016-09-18 23:10:26 +02:00

1310 lines
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GLSL
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[vertex]
#ifdef USE_GLES_OVER_GL
#define mediump
#define highp
#define roundfix( m_val ) floor( (m_val) + 0.5 )
#else
precision mediump float;
precision mediump int;
#endif
/*
from VisualServer:
ARRAY_VERTEX=0,
ARRAY_NORMAL=1,
ARRAY_TANGENT=2,
ARRAY_COLOR=3,
ARRAY_TEX_UV=4,
ARRAY_TEX_UV2=5,
ARRAY_BONES=6,
ARRAY_WEIGHTS=7,
ARRAY_INDEX=8,
*/
//hack to use uv if no uv present so it works with lightmap
#ifdef ENABLE_AMBIENT_LIGHTMAP
#ifdef USE_LIGHTMAP_ON_UV2
#ifndef ENABLE_UV2_INTERP
#define ENABLE_UV2_INTERP
#endif
#else
#ifndef ENABLE_UV_INTERP
#define ENABLE_UV_INTERP
#endif
#endif
#endif
/* INPUT ATTRIBS */
attribute highp vec4 vertex_attrib; // attrib:0
attribute vec3 normal_attrib; // attrib:1
attribute vec4 tangent_attrib; // attrib:2
attribute vec4 color_attrib; // attrib:3
attribute vec2 uv_attrib; // attrib:4
attribute vec2 uv2_attrib; // attrib:5
uniform float normal_mult;
#ifdef USE_SKELETON
attribute vec4 bone_indices; // attrib:6
attribute vec4 bone_weights; // attrib:7
uniform highp sampler2D skeleton_matrices;
uniform highp float skeltex_pixel_size;
#endif
#ifdef USE_ATTRIBUTE_INSTANCING
attribute highp vec4 instance_row0; // attrib:8
attribute highp vec4 instance_row1; // attrib:9
attribute highp vec4 instance_row2; // attrib:10
attribute highp vec4 instance_row3; // attrib:11
#endif
#ifdef USE_TEXTURE_INSTANCING
attribute highp vec3 instance_uv; // attrib:6
uniform highp sampler2D instance_matrices;
#endif
uniform highp mat4 world_transform;
uniform highp mat4 camera_inverse_transform;
uniform highp mat4 projection_transform;
#ifdef USE_UNIFORM_INSTANCING
//shittiest form of instancing (but most compatible)
uniform highp mat4 instance_transform;
#endif
/* Varyings */
varying vec3 vertex_interp;
varying vec3 normal_interp;
#if defined(ENABLE_COLOR_INTERP)
varying vec4 color_interp;
#endif
#if defined(ENABLE_UV_INTERP)
varying vec2 uv_interp;
#endif
#if defined(ENABLE_UV2_INTERP)
varying vec2 uv2_interp;
#endif
#if defined(ENABLE_VAR1_INTERP)
varying vec4 var1_interp;
#endif
#if defined(ENABLE_VAR2_INTERP)
varying vec4 var2_interp;
#endif
#if defined(ENABLE_TANGENT_INTERP)
varying vec3 tangent_interp;
varying vec3 binormal_interp;
#endif
#ifdef ENABLE_AMBIENT_OCTREE
uniform highp mat4 ambient_octree_inverse_transform;
varying highp vec3 ambient_octree_coords;
#endif
#ifdef USE_FOG
varying vec4 fog_interp;
uniform highp vec3 fog_params;
uniform vec3 fog_color_begin;
uniform vec3 fog_color_end;
#endif
#ifdef USE_VERTEX_LIGHTING
uniform vec3 light_pos;
uniform vec3 light_direction;
uniform vec3 light_attenuation;
uniform vec3 light_spot_attenuation;
uniform vec3 light_diffuse;
uniform vec3 light_specular;
#endif
varying vec4 diffuse_interp;
varying vec3 specular_interp;
//intended for static branching
//pretty much all meaningful platforms support
//static branching
uniform float time;
uniform float instance_id;
uniform vec3 ambient_light;
#if !defined(USE_DEPTH_SHADOWS) && defined(USE_SHADOW_PASS)
varying vec4 position_interp;
#endif
#ifdef LIGHT_USE_SHADOW
uniform highp mat4 shadow_matrix;
varying highp vec4 shadow_coord;
#ifdef LIGHT_USE_PSSM
uniform highp mat4 shadow_matrix2;
varying highp vec4 shadow_coord2;
#endif
#ifdef LIGHT_USE_PSSM4
uniform highp mat4 shadow_matrix3;
varying highp vec4 shadow_coord3;
uniform highp mat4 shadow_matrix4;
varying highp vec4 shadow_coord4;
#endif
#endif
#ifdef USE_SHADOW_PASS
uniform highp float shadow_z_offset;
uniform highp float shadow_z_slope_scale;
#endif
#ifdef USE_DUAL_PARABOLOID
uniform highp vec2 dual_paraboloid;
varying float dp_clip;
#endif
VERTEX_SHADER_GLOBALS
void main() {
#ifdef USE_UNIFORM_INSTANCING
highp mat4 modelview = (camera_inverse_transform * (world_transform * instance_transform));
#ifdef ENABLE_AMBIENT_OCTREE
highp mat4 ambient_octree_transform = (ambient_octree_inverse_transform * (world_transform * instance_transform));
#endif
#else
#ifdef USE_ATTRIBUTE_INSTANCING
highp mat4 minst=mat4(instance_row0,instance_row1,instance_row2,instance_row3);
highp mat4 modelview = (camera_inverse_transform * (world_transform * minst));
#ifdef ENABLE_AMBIENT_OCTREE
highp mat4 ambient_octree_transform = (ambient_octree_inverse_transform * (world_transform * minst));
#endif
#else
#ifdef USE_TEXTURE_INSTANCING
highp vec2 ins_ofs=vec2(instance_uv.z,0.0);
highp mat4 minst=mat4(
texture2D(instance_matrices,instance_uv.xy),
texture2D(instance_matrices,instance_uv.xy+ins_ofs),
texture2D(instance_matrices,instance_uv.xy+ins_ofs*2.0),
texture2D(instance_matrices,instance_uv.xy+ins_ofs*3.0)
);
/*highp mat4 minst=mat4(
vec4(1.0,0.0,0.0,0.0),
vec4(0.0,1.0,0.0,0.0),
vec4(0.0,0.0,1.0,0.0),
vec4(0.0,0.0,0.0,1.0)
);*/
highp mat4 modelview = (camera_inverse_transform * (world_transform * minst));
#ifdef ENABLE_AMBIENT_OCTREE
highp mat4 ambient_octree_transform = (ambient_octree_inverse_transform * (world_transform * minst));
#endif
#else
highp mat4 modelview = (camera_inverse_transform * world_transform);
#ifdef ENABLE_AMBIENT_OCTREE
highp mat4 ambient_octree_transform = (ambient_octree_inverse_transform * world_transform);
#endif
#endif
#endif
#endif
highp vec4 vertex_in = vertex_attrib; // vec4(vertex_attrib.xyz * data_attrib.x,1.0);
vec3 normal_in = normal_attrib;
normal_in*=normal_mult;
#if defined(ENABLE_TANGENT_INTERP)
vec3 tangent_in = tangent_attrib.xyz;
tangent_in*=normal_mult;
float binormalf = tangent_attrib.a;
#endif
#ifdef USE_SKELETON
{
//skeleton transform
highp mat4 m=mat4(texture2D(skeleton_matrices,vec2((bone_indices.x*3.0+0.0)*skeltex_pixel_size,0.0)),texture2D(skeleton_matrices,vec2((bone_indices.x*3.0+1.0)*skeltex_pixel_size,0.0)),texture2D(skeleton_matrices,vec2((bone_indices.x*3.0+2.0)*skeltex_pixel_size,0.0)),vec4(0.0,0.0,0.0,1.0))*bone_weights.x;
m+=mat4(texture2D(skeleton_matrices,vec2((bone_indices.y*3.0+0.0)*skeltex_pixel_size,0.0)),texture2D(skeleton_matrices,vec2((bone_indices.y*3.0+1.0)*skeltex_pixel_size,0.0)),texture2D(skeleton_matrices,vec2((bone_indices.y*3.0+2.0)*skeltex_pixel_size,0.0)),vec4(0.0,0.0,0.0,1.0))*bone_weights.y;
m+=mat4(texture2D(skeleton_matrices,vec2((bone_indices.z*3.0+0.0)*skeltex_pixel_size,0.0)),texture2D(skeleton_matrices,vec2((bone_indices.z*3.0+1.0)*skeltex_pixel_size,0.0)),texture2D(skeleton_matrices,vec2((bone_indices.z*3.0+2.0)*skeltex_pixel_size,0.0)),vec4(0.0,0.0,0.0,1.0))*bone_weights.z;
m+=mat4(texture2D(skeleton_matrices,vec2((bone_indices.w*3.0+0.0)*skeltex_pixel_size,0.0)),texture2D(skeleton_matrices,vec2((bone_indices.w*3.0+1.0)*skeltex_pixel_size,0.0)),texture2D(skeleton_matrices,vec2((bone_indices.w*3.0+2.0)*skeltex_pixel_size,0.0)),vec4(0.0,0.0,0.0,1.0))*bone_weights.w;
vertex_in = vertex_in * m;
normal_in = (vec4(normal_in,0.0) * m).xyz;
#if defined(ENABLE_TANGENT_INTERP)
tangent_in = (vec4(tangent_in,0.0) * m).xyz;
#endif
}
#endif
#ifdef ENABLE_AMBIENT_OCTREE
ambient_octree_coords = (ambient_octree_transform * vertex_in).xyz;
#endif
vertex_interp = (modelview * vertex_in).xyz;
normal_interp = normalize((modelview * vec4(normal_in,0.0)).xyz);
#if defined(ENABLE_COLOR_INTERP)
#ifdef USE_COLOR_ATTRIB_SRGB_TO_LINEAR
color_interp = vec4(
color_attrib.r<0.04045 ? color_attrib.r * (1.0 / 12.92) : pow((color_attrib.r + 0.055) * (1.0 / (1 + 0.055)), 2.4),
color_attrib.g<0.04045 ? color_attrib.g * (1.0 / 12.92) : pow((color_attrib.g + 0.055) * (1.0 / (1 + 0.055)), 2.4),
color_attrib.b<0.04045 ? color_attrib.b * (1.0 / 12.92) : pow((color_attrib.b + 0.055) * (1.0 / (1 + 0.055)), 2.4),
color_attrib.a
);
#else
color_interp = color_attrib;
#endif
#endif
#if defined(ENABLE_TANGENT_INTERP)
tangent_interp=normalize((modelview * vec4(tangent_in,0.0)).xyz);
binormal_interp = normalize( cross(normal_interp,tangent_interp) * binormalf );
#endif
#if defined(ENABLE_UV_INTERP)
uv_interp = uv_attrib;
#endif
#if defined(ENABLE_UV2_INTERP)
uv2_interp = uv2_attrib;
#endif
float vertex_specular_exp = 40.0; //material_specular.a;
VERTEX_SHADER_CODE
#ifdef USE_DUAL_PARABOLOID
//for dual paraboloid shadow mapping
highp vec3 vtx = vertex_interp;
vtx.z*=dual_paraboloid.y; //side to affect
vtx.z+=0.01;
dp_clip=vtx.z;
highp float len=length( vtx );
vtx=normalize(vtx);
vtx.xy/=1.0+vtx.z;
vtx.z = len*dual_paraboloid.x; // it's a reciprocal(len - z_near) / (z_far - z_near);
vtx+=normalize(vtx)*0.025;
vtx.z = vtx.z * 2.0 - 1.0; // fit to clipspace
vertex_interp=vtx;
//vertex_interp.w = z_clip;
#endif
#ifdef USE_SHADOW_PASS
float z_ofs = shadow_z_offset;
z_ofs += (1.0-abs(normal_interp.z))*shadow_z_slope_scale;
vertex_interp.z-=z_ofs;
#endif
#ifdef LIGHT_USE_SHADOW
shadow_coord = shadow_matrix * vec4(vertex_interp,1.0);
shadow_coord.xyz/=shadow_coord.w;
#ifdef LIGHT_USE_PSSM
shadow_coord.y*=0.5;
shadow_coord.y+=0.5;
shadow_coord2 = shadow_matrix2 * vec4(vertex_interp,1.0);
shadow_coord2.xyz/=shadow_coord2.w;
shadow_coord2.y*=0.5;
#endif
#ifdef LIGHT_USE_PSSM4
shadow_coord.x*=0.5;
shadow_coord2.x*=0.5;
shadow_coord3 = shadow_matrix3 * vec4(vertex_interp,1.0);
shadow_coord3.xyz/=shadow_coord3.w;
shadow_coord3.xy*=vec2(0.5);
shadow_coord3.xy+=vec2(0.5);
shadow_coord4 = shadow_matrix4 * vec4(vertex_interp,1.0);
shadow_coord4.xyz/=shadow_coord4.w;
shadow_coord4.xy*=vec2(0.5);
shadow_coord4.x+=0.5;
#endif
#endif
#ifdef USE_FOG
fog_interp.a = pow( clamp( (length(vertex_interp)-fog_params.x)/(fog_params.y-fog_params.x), 0.0, 1.0 ), fog_params.z );
fog_interp.rgb = mix( fog_color_begin, fog_color_end, fog_interp.a );
#endif
#ifndef VERTEX_SHADER_WRITE_POSITION
//vertex shader might write a position
gl_Position = projection_transform * vec4(vertex_interp,1.0);
#endif
#if !defined(USE_DEPTH_SHADOWS) && defined(USE_SHADOW_PASS)
position_interp=gl_Position;
#endif
#ifdef USE_VERTEX_LIGHTING
vec3 eye_vec = -normalize(vertex_interp);
#ifdef LIGHT_TYPE_DIRECTIONAL
vec3 light_dir = -light_direction;
float attenuation = light_attenuation.r;
#endif
#ifdef LIGHT_TYPE_OMNI
vec3 light_dir = light_pos-vertex_interp;
float radius = light_attenuation.g;
float dist = min(length(light_dir),radius);
light_dir=normalize(light_dir);
float attenuation = pow( max(1.0 - dist/radius, 0.0), light_attenuation.b ) * light_attenuation.r;
#endif
#ifdef LIGHT_TYPE_SPOT
vec3 light_dir = light_pos-vertex_interp;
float radius = light_attenuation.g;
float dist = min(length(light_dir),radius);
light_dir=normalize(light_dir);
float attenuation = pow( max(1.0 - dist/radius, 0.0), light_attenuation.b ) * light_attenuation.r;
vec3 spot_dir = light_direction;
float spot_cutoff=light_spot_attenuation.r;
float scos = max(dot(-light_dir, spot_dir),spot_cutoff);
float rim = (1.0 - scos) / (1.0 - spot_cutoff);
attenuation *= 1.0 - pow( rim, light_spot_attenuation.g);
#endif
#if defined(LIGHT_TYPE_DIRECTIONAL) || defined(LIGHT_TYPE_OMNI) || defined(LIGHT_TYPE_SPOT)
//process_shade(normal_interp,light_dir,eye_vec,vertex_specular_exp,attenuation,diffuse_interp,specular_interp);
{
float NdotL = max(0.0,dot( normal_interp, light_dir ));
vec3 half_vec = normalize(light_dir + eye_vec);
float eye_light = max(dot(normal_interp, half_vec),0.0);
diffuse_interp.rgb=light_diffuse * NdotL * attenuation;
diffuse_interp.a=attenuation;
if (NdotL > 0.0) {
specular_interp=light_specular * pow( eye_light, vertex_specular_exp ) * attenuation;
} else {
specular_interp=vec3(0.0);
}
}
#else
#ifdef SHADELESS
diffuse_interp=vec4(vec3(1.0),0.0);
specular_interp=vec3(0.0);
# else
diffuse_interp=vec4(0.0);
specular_interp=vec3(0.0);
# endif
#endif
#endif
}
[fragment]
#ifdef USE_GLES_OVER_GL
#define mediump
#define highp
#define roundfix( m_val ) floor( (m_val) + 0.5 )
#else
precision mediump float;
precision mediump int;
#endif
//hack to use uv if no uv present so it works with lightmap
#ifdef ENABLE_AMBIENT_LIGHTMAP
#ifdef USE_LIGHTMAP_ON_UV2
#ifndef ENABLE_UV2_INTERP
#define ENABLE_UV2_INTERP
#endif
#else
#ifndef ENABLE_UV_INTERP
#define ENABLE_UV_INTERP
#endif
#endif
#endif
/* Varyings */
#if defined(ENABLE_COLOR_INTERP)
varying vec4 color_interp;
#endif
#if defined(ENABLE_UV_INTERP)
varying vec2 uv_interp;
#endif
#if defined(ENABLE_UV2_INTERP)
varying vec2 uv2_interp;
#endif
#if defined(ENABLE_TANGENT_INTERP)
varying vec3 tangent_interp;
varying vec3 binormal_interp;
#endif
#if defined(ENABLE_VAR1_INTERP)
varying vec4 var1_interp;
#endif
#if defined(ENABLE_VAR2_INTERP)
varying vec4 var2_interp;
#endif
#ifdef LIGHT_USE_PSSM
uniform vec3 light_pssm_split;
#endif
varying vec3 vertex_interp;
varying vec3 normal_interp;
#ifdef USE_FOG
varying vec4 fog_interp;
#endif
/* Material Uniforms */
#ifdef USE_VERTEX_LIGHTING
varying vec4 diffuse_interp;
varying vec3 specular_interp;
#endif
#if !defined(USE_DEPTH_SHADOWS) && defined(USE_SHADOW_PASS)
varying vec4 position_interp;
#endif
uniform vec3 light_pos;
uniform vec3 light_direction;
uniform vec3 light_attenuation;
uniform vec3 light_spot_attenuation;
uniform vec3 light_diffuse;
uniform vec3 light_specular;
uniform vec3 ambient_light;
#ifdef USE_FRAGMENT_LIGHTING
# ifdef USE_DEPTH_SHADOWS
# else
# endif
#endif
uniform float const_light_mult;
uniform float time;
#ifdef ENABLE_AMBIENT_OCTREE
varying highp vec3 ambient_octree_coords;
uniform highp float ambient_octree_lattice_size;
uniform highp vec2 ambient_octree_pix_size;
uniform highp vec2 ambient_octree_light_pix_size;
uniform highp float ambient_octree_lattice_divide;
uniform highp sampler2D ambient_octree_tex;
uniform highp sampler2D ambient_octree_light_tex;
uniform float ambient_octree_multiplier;
uniform int ambient_octree_steps;
#endif
#ifdef ENABLE_AMBIENT_LIGHTMAP
uniform highp sampler2D ambient_lightmap;
uniform float ambient_lightmap_multiplier;
#endif
#ifdef ENABLE_AMBIENT_DP_SAMPLER
uniform highp sampler2D ambient_dp_sampler;
uniform float ambient_dp_sampler_multiplier;
#endif
#ifdef ENABLE_AMBIENT_COLOR
uniform vec3 ambient_color;
#endif
FRAGMENT_SHADER_GLOBALS
#ifdef LIGHT_USE_SHADOW
varying highp vec4 shadow_coord;
#ifdef LIGHT_USE_PSSM
varying highp vec4 shadow_coord2;
#endif
#ifdef LIGHT_USE_PSSM4
varying highp vec4 shadow_coord3;
varying highp vec4 shadow_coord4;
#endif
uniform highp sampler2D shadow_texture;
uniform highp vec2 shadow_texel_size;
uniform float shadow_darkening;
#ifdef USE_DEPTH_SHADOWS
#define SHADOW_DEPTH(m_tex,m_uv) (texture2D((m_tex),(m_uv)).z)
#else
//#define SHADOW_DEPTH(m_tex,m_uv) dot(texture2D((m_tex),(m_uv)),highp vec4(1.0 / (256.0 * 256.0 * 256.0),1.0 / (256.0 * 256.0),1.0 / 256.0,1) )
#define SHADOW_DEPTH(m_tex,m_uv) dot(texture2D((m_tex),(m_uv)),vec4(1.0 / (256.0 * 256.0 * 256.0),1.0 / (256.0 * 256.0),1.0 / 256.0,1) )
#endif
#ifdef USE_SHADOW_PCF
#ifdef USE_SHADOW_PCF_HQ
float SAMPLE_SHADOW_TEX( highp vec2 coord, highp float refdepth) {
float avg=(SHADOW_DEPTH(shadow_texture,coord) < refdepth ? 0.0 : 1.0);
avg+=(SHADOW_DEPTH(shadow_texture,coord+vec2(shadow_texel_size.x,0.0)) < refdepth ? 0.0 : 1.0);
avg+=(SHADOW_DEPTH(shadow_texture,coord+vec2(-shadow_texel_size.x,0.0)) < refdepth ? 0.0 : 1.0);
avg+=(SHADOW_DEPTH(shadow_texture,coord+vec2(0.0,shadow_texel_size.y)) < refdepth ? 0.0 : 1.0);
avg+=(SHADOW_DEPTH(shadow_texture,coord+vec2(0.0,-shadow_texel_size.y)) < refdepth ? 0.0 : 1.0);
avg+=(SHADOW_DEPTH(shadow_texture,coord+vec2(shadow_texel_size.x,shadow_texel_size.y)) < refdepth ? 0.0 : 1.0);
avg+=(SHADOW_DEPTH(shadow_texture,coord+vec2(-shadow_texel_size.x,shadow_texel_size.y)) < refdepth ? 0.0 : 1.0);
avg+=(SHADOW_DEPTH(shadow_texture,coord+vec2(shadow_texel_size.x,-shadow_texel_size.y)) < refdepth ? 0.0 : 1.0);
avg+=(SHADOW_DEPTH(shadow_texture,coord+vec2(-shadow_texel_size.x,-shadow_texel_size.y)) < refdepth ? 0.0 : 1.0);
avg+=(SHADOW_DEPTH(shadow_texture,coord+vec2(shadow_texel_size.x*2.0,0.0)) < refdepth ? 0.0 : 1.0);
avg+=(SHADOW_DEPTH(shadow_texture,coord+vec2(-shadow_texel_size.x*2.0,0.0)) < refdepth ? 0.0 : 1.0);
avg+=(SHADOW_DEPTH(shadow_texture,coord+vec2(0.0,shadow_texel_size.y*2.0)) < refdepth ? 0.0 : 1.0);
avg+=(SHADOW_DEPTH(shadow_texture,coord+vec2(0.0,-shadow_texel_size.y*2.0)) < refdepth ? 0.0 : 1.0);
return avg*(1.0/13.0);
}
#else
float SAMPLE_SHADOW_TEX( highp vec2 coord, highp float refdepth) {
float avg=(SHADOW_DEPTH(shadow_texture,coord) < refdepth ? 0.0 : 1.0);
avg+=(SHADOW_DEPTH(shadow_texture,coord+vec2(shadow_texel_size.x,0.0)) < refdepth ? 0.0 : 1.0);
avg+=(SHADOW_DEPTH(shadow_texture,coord+vec2(-shadow_texel_size.x,0.0)) < refdepth ? 0.0 : 1.0);
avg+=(SHADOW_DEPTH(shadow_texture,coord+vec2(0.0,shadow_texel_size.y)) < refdepth ? 0.0 : 1.0);
avg+=(SHADOW_DEPTH(shadow_texture,coord+vec2(0.0,-shadow_texel_size.y)) < refdepth ? 0.0 : 1.0);
return avg*0.2;
}
#endif
/*
16x averaging
float SAMPLE_SHADOW_TEX( highp vec2 coord, highp float refdepth) {
vec2 offset = vec2(
lessThan(vec2(0.25),fract(gl_FragCoord.xy * 0.5))
);
offset.y += offset.x; // y ^= x in floating point
if (offset.y > 1.1)
offset.y = 0.0;
float avg = step( refdepth, SHADOW_DEPTH(shadow_texture, coord+ (offset + vec2(-1.5, 0.5))*shadow_texel_size) );
avg+=step(refdepth, SHADOW_DEPTH(shadow_texture, coord+ (offset + vec2(0.5, 0.5))*shadow_texel_size) );
avg+=step(refdepth, SHADOW_DEPTH(shadow_texture, coord+ (offset + vec2(-1.5, -1.5))*shadow_texel_size) );
avg+=step(refdepth, SHADOW_DEPTH(shadow_texture, coord+ (offset + vec2(0.5, -1.5))*shadow_texel_size) );
return avg * 0.25;
}
*/
/*
float SAMPLE_SHADOW_TEX( highp vec2 coord, highp float refdepth) {
vec2 offset = vec2(
lessThan(vec2(0.25),fract(gl_FragCoord.xy * 0.5))
);
offset.y += offset.x; // y ^= x in floating point
if (offset.y > 1.1)
offset.y = 0.0;
return step( refdepth, SHADOW_DEPTH(shadow_texture, coord+ offset*shadow_texel_size) );
}
*/
/* simple pcf4 */
//#define SAMPLE_SHADOW_TEX(m_coord,m_depth) ((step(m_depth,SHADOW_DEPTH(shadow_texture,m_coord))+step(m_depth,SHADOW_DEPTH(shadow_texture,m_coord+vec2(0.0,shadow_texel_size.y)))+step(m_depth,SHADOW_DEPTH(shadow_texture,m_coord+vec2(shadow_texel_size.x,0.0)))+step(m_depth,SHADOW_DEPTH(shadow_texture,m_coord+shadow_texel_size)))/4.0)
#endif
#ifdef USE_SHADOW_ESM
uniform float esm_multiplier;
float SAMPLE_SHADOW_TEX(vec2 p_uv,float p_depth) {
#if defined (USE_DEPTH_SHADOWS)
//these only are used if interpolation exists
highp float occluder = SHADOW_DEPTH(shadow_texture, p_uv);
#else
vec2 unnormalized = p_uv/shadow_texel_size;
vec2 fractional = fract(unnormalized);
unnormalized = floor(unnormalized);
vec4 exponent;
exponent.x = SHADOW_DEPTH(shadow_texture, (unnormalized + vec2( -0.5, 0.5 )) * shadow_texel_size );
exponent.y = SHADOW_DEPTH(shadow_texture, (unnormalized + vec2( 0.5, 0.5 )) * shadow_texel_size );
exponent.z = SHADOW_DEPTH(shadow_texture, (unnormalized + vec2( 0.5, -0.5 )) * shadow_texel_size );
exponent.w = SHADOW_DEPTH(shadow_texture, (unnormalized + vec2( -0.5, -0.5 )) * shadow_texel_size );
highp float occluder = (exponent.w + (exponent.x - exponent.w) * fractional.y);
occluder = occluder + ((exponent.z + (exponent.y - exponent.z) * fractional.y) - occluder)*fractional.x;
#endif
return clamp(exp(esm_multiplier* ( occluder - p_depth )),0.0,1.0);
}
#endif
#if !defined(USE_SHADOW_PCF) && !defined(USE_SHADOW_ESM)
#define SAMPLE_SHADOW_TEX(m_coord,m_depth) (SHADOW_DEPTH(shadow_texture,m_coord) < m_depth ? 0.0 : 1.0)
#endif
#endif
#ifdef USE_DUAL_PARABOLOID
varying float dp_clip;
#endif
uniform highp mat4 camera_inverse_transform;
#if defined(ENABLE_TEXSCREEN)
uniform vec2 texscreen_screen_mult;
uniform vec4 texscreen_screen_clamp;
uniform sampler2D texscreen_tex;
#endif
#if defined(ENABLE_SCREEN_UV)
uniform vec2 screen_uv_mult;
#endif
void main() {
#ifdef USE_DUAL_PARABOLOID
if (dp_clip<0.0)
discard;
#endif
//lay out everything, whathever is unused is optimized away anyway
vec3 vertex = vertex_interp;
vec4 diffuse = vec4(0.9,0.9,0.9,1.0);
vec3 specular = vec3(0.0,0.0,0.0);
vec3 emission = vec3(0.0,0.0,0.0);
float specular_exp=1.0;
float glow=0.0;
float shade_param=0.0;
float side=float(gl_FrontFacing)*2.0-1.0;
#if defined(ENABLE_TANGENT_INTERP)
vec3 binormal = normalize(binormal_interp)*side;
vec3 tangent = normalize(tangent_interp)*side;
#endif
// vec3 normal = abs(normalize(normal_interp))*side;
vec3 normal = normalize(normal_interp)*side;
#if defined(ENABLE_SCREEN_UV)
vec2 screen_uv = gl_FragCoord.xy*screen_uv_mult;
#endif
#if defined(ENABLE_UV_INTERP)
vec2 uv = uv_interp;
#endif
#if defined(ENABLE_UV2_INTERP)
vec2 uv2 = uv2_interp;
#endif
#if defined(ENABLE_COLOR_INTERP)
vec4 color = color_interp;
#endif
#if defined(ENABLE_NORMALMAP)
vec3 normalmap = vec3(0.0);
#endif
float normaldepth=1.0;
#if defined(ENABLE_DISCARD)
bool discard_=false;
#endif
{
FRAGMENT_SHADER_CODE
}
#if defined(ENABLE_NORMALMAP)
normal = normalize( mix(normal_interp,tangent_interp * normalmap.x + binormal_interp * normalmap.y + normal_interp * normalmap.z,normaldepth) ) * side;
#endif
#if defined(ENABLE_DISCARD)
if (discard_) {
//easy to eliminate dead code
discard;
}
#endif
#ifdef ENABLE_CLIP_ALPHA
if (diffuse.a<0.99) {
//used for doublepass and shadowmapping
discard;
}
#endif
float shadow_attenuation = 1.0;
#ifdef ENABLE_AMBIENT_LIGHTMAP
vec3 ambientmap_color = vec3(0.0,0.0,0.0);
vec2 ambientmap_uv = vec2(0.0,0.0);
#ifdef USE_LIGHTMAP_ON_UV2
ambientmap_uv = uv2_interp;
#else
ambientmap_uv = uv_interp;
#endif
vec4 amcol = texture2D(ambient_lightmap,ambientmap_uv);
shadow_attenuation=amcol.a;
ambientmap_color = amcol.rgb;
ambientmap_color*=ambient_lightmap_multiplier;
ambientmap_color*=diffuse.rgb;
#endif
#ifdef ENABLE_AMBIENT_OCTREE
vec3 ambientmap_color = vec3(0.0,0.0,0.0);
{
//read position from initial lattice grid
highp vec3 lattice_pos = floor(ambient_octree_coords*ambient_octree_lattice_size);
highp vec2 octant_uv = highp vec2(lattice_pos.x+ambient_octree_lattice_size*lattice_pos.z,lattice_pos.y);
octant_uv=(octant_uv*highp vec2(2.0,4.0)+highp vec2(0.0,4.0));
highp float ld = 1.0/ambient_octree_lattice_size;
//go down the octree
for(int i=0;i<ambient_octree_steps;i++) {
highp vec3 sub=mod(ambient_octree_coords,ld);
ld*=0.5;
highp vec3 s = step(ld,sub);
octant_uv+=s.xy;
octant_uv.y+=s.z*2.0;
octant_uv=(octant_uv+0.5)*ambient_octree_pix_size;
highp vec4 new_uv = texture2D(ambient_octree_tex,octant_uv);
octant_uv=floor(highp vec2( dot(new_uv.xy,highp vec2(65280.0,255.0)), dot(new_uv.zw,highp vec2(65280.0,255.0)) )+0.5);//+ambient_octree_pix_size*0.5;
}
//sample color
octant_uv=(octant_uv+0.5)*ambient_octree_light_pix_size;
highp vec3 sub=(mod(ambient_octree_coords,ld)/ld);
octant_uv.xy+=sub.xy*ambient_octree_light_pix_size.xy;
vec3 col_up=texture2D(ambient_octree_light_tex,octant_uv).rgb;
octant_uv.y+=ambient_octree_light_pix_size.y*2.0;
vec3 col_down=texture2D(ambient_octree_light_tex,octant_uv).rgb;
ambientmap_color=mix(col_up,col_down,sub.z)*ambient_octree_multiplier;
ambientmap_color*=diffuse.rgb;
}
#endif
#ifdef ENABLE_AMBIENT_DP_SAMPLER
vec3 ambientmap_color = vec3(0.0,0.0,0.0);
{
vec3 dp_normal = normalize((vec4(normal,0) * camera_inverse_transform).xyz);
vec2 ambient_uv = (dp_normal.xy / (1.0+abs(dp_normal.z)))*0.5+0.5; //dual paraboloid
ambient_uv.y*=0.5;
if (dp_normal.z<0) {
ambient_uv.y=(0.5-ambient_uv.y)+0.5;
}
ambientmap_color = texture2D(ambient_dp_sampler,ambient_uv ).rgb * ambient_dp_sampler_multiplier;
ambientmap_color*=diffuse.rgb;
}
#endif
#ifdef LIGHT_USE_SHADOW
#ifdef LIGHT_TYPE_DIRECTIONAL
#ifdef LIGHT_USE_PSSM
// if (vertex_interp.z > light_pssm_split) {
#if 0
highp vec3 splane = vec3(0.0,0.0,0.0);
if (gl_FragCoord.w > light_pssm_split.x) {
splane = shadow_coord.xyz;
splane.y+=1.0;
} else {
splane = shadow_coord2.xyz;
}
splane.y*=0.5;
shadow_attenuation=SAMPLE_SHADOW_TEX(splane.xy,splane.z);
#else
/*
float sa_a = SAMPLE_SHADOW_TEX(shadow_coord.xy,shadow_coord.z);
float sa_b = SAMPLE_SHADOW_TEX(shadow_coord2.xy,shadow_coord2.z);
if (gl_FragCoord.w > light_pssm_split.x) {
shadow_attenuation=sa_a;
} else {
shadow_attenuation=sa_b;
}
*/
vec2 pssm_coord;
float pssm_z;
#if defined(LIGHT_USE_PSSM) && defined(USE_SHADOW_ESM)
#define USE_PSSM_BLEND
float pssm_blend;
vec2 pssm_coord_2;
float pssm_z_2;
vec3 light_pssm_split_inv = 1.0/light_pssm_split;
float w_inv = 1.0/gl_FragCoord.w;
#endif
#ifdef LIGHT_USE_PSSM4
if (gl_FragCoord.w > light_pssm_split.y) {
if (gl_FragCoord.w > light_pssm_split.x) {
pssm_coord=shadow_coord.xy;
pssm_z=shadow_coord.z;
#if defined(USE_PSSM_BLEND)
pssm_coord_2=shadow_coord2.xy;
pssm_z_2=shadow_coord2.z;
pssm_blend=smoothstep(0.0,light_pssm_split_inv.x,w_inv);
#endif
} else {
pssm_coord=shadow_coord2.xy;
pssm_z=shadow_coord2.z;
#if defined(USE_PSSM_BLEND)
pssm_coord_2=shadow_coord3.xy;
pssm_z_2=shadow_coord3.z;
pssm_blend=smoothstep(light_pssm_split_inv.x,light_pssm_split_inv.y,w_inv);
#endif
}
} else {
if (gl_FragCoord.w > light_pssm_split.z) {
pssm_coord=shadow_coord3.xy;
pssm_z=shadow_coord3.z;
#if defined(USE_PSSM_BLEND)
pssm_coord_2=shadow_coord4.xy;
pssm_z_2=shadow_coord4.z;
pssm_blend=smoothstep(light_pssm_split_inv.y,light_pssm_split_inv.z,w_inv);
#endif
} else {
pssm_coord=shadow_coord4.xy;
pssm_z=shadow_coord4.z;
#if defined(USE_PSSM_BLEND)
pssm_coord_2=shadow_coord4.xy;
pssm_z_2=shadow_coord4.z;
pssm_blend=0.0;
#endif
}
}
#else
if (gl_FragCoord.w > light_pssm_split.x) {
pssm_coord=shadow_coord.xy;
pssm_z=shadow_coord.z;
#if defined(USE_PSSM_BLEND)
pssm_coord_2=shadow_coord2.xy;
pssm_z_2=shadow_coord2.z;
pssm_blend=smoothstep(0.0,light_pssm_split_inv.x,w_inv);
#endif
} else {
pssm_coord=shadow_coord2.xy;
pssm_z=shadow_coord2.z;
#if defined(USE_PSSM_BLEND)
pssm_coord_2=shadow_coord2.xy;
pssm_z_2=shadow_coord2.z;
pssm_blend=0.0;
#endif
}
#endif
//one one sample
shadow_attenuation=SAMPLE_SHADOW_TEX(pssm_coord,pssm_z);
#if defined(USE_PSSM_BLEND)
shadow_attenuation=mix(shadow_attenuation,SAMPLE_SHADOW_TEX(pssm_coord_2,pssm_z_2),pssm_blend);
#endif
#endif
#else
shadow_attenuation=SAMPLE_SHADOW_TEX(shadow_coord.xy,shadow_coord.z);
#endif
#endif
#ifdef LIGHT_TYPE_OMNI
vec3 splane=shadow_coord.xyz;///shadow_coord.w;
float shadow_len=length(splane);
splane=normalize(splane);
float vofs=0.0;
if (splane.z>=0.0) {
splane.z+=1.0;
} else {
splane.z=1.0 - splane.z;
vofs=0.5;
}
splane.xy/=splane.z;
splane.xy=splane.xy * 0.5 + 0.5;
float lradius = light_attenuation.g;
splane.z = shadow_len / lradius;
splane.y=clamp(splane.y,0.0,1.0)*0.5+vofs;
shadow_attenuation=SAMPLE_SHADOW_TEX(splane.xy,splane.z);
#endif
#ifdef LIGHT_TYPE_SPOT
shadow_attenuation=SAMPLE_SHADOW_TEX(shadow_coord.xy,shadow_coord.z);
#endif
shadow_attenuation=mix(shadow_attenuation,1.0,shadow_darkening);
#endif
#ifdef USE_FRAGMENT_LIGHTING
vec3 eye_vec = -normalize(vertex);
#ifdef LIGHT_TYPE_DIRECTIONAL
vec3 light_dir = -light_direction;
float attenuation = light_attenuation.r;
#endif
#ifdef LIGHT_TYPE_OMNI
vec3 light_dir = light_pos-vertex;
float radius = light_attenuation.g;
float dist = min(length(light_dir),radius);
light_dir=normalize(light_dir);
float attenuation = pow( max(1.0 - dist/radius, 0.0), light_attenuation.b ) * light_attenuation.r;
#endif
#ifdef LIGHT_TYPE_SPOT
vec3 light_dir = light_pos-vertex;
float radius = light_attenuation.g;
float dist = min(length(light_dir),radius);
light_dir=normalize(light_dir);
float attenuation = pow( max(1.0 - dist/radius, 0.0), light_attenuation.b ) * light_attenuation.r;
vec3 spot_dir = light_direction;
float spot_cutoff=light_spot_attenuation.r;
float scos = max(dot(-light_dir, spot_dir),spot_cutoff);
float rim = (1.0 - scos) / (1.0 - spot_cutoff);
attenuation *= 1.0 - pow( rim, light_spot_attenuation.g);
#endif
# if defined(LIGHT_TYPE_DIRECTIONAL) || defined(LIGHT_TYPE_OMNI) || defined (LIGHT_TYPE_SPOT)
{
vec3 mdiffuse = diffuse.rgb;
vec3 light;
#if defined(USE_OUTPUT_SHADOW_COLOR)
vec3 shadow_color=vec3(0.0,0.0,0.0);
#endif
#if defined(USE_LIGHT_SHADER_CODE)
//light is written by the light shader
{
LIGHT_SHADER_CODE
}
#else
//traditional lambert + blinn
float NdotL = max(0.0,dot( normal, light_dir ));
vec3 half_vec = normalize(light_dir + eye_vec);
float eye_light = max(dot(normal, half_vec),0.0);
light = light_diffuse * mdiffuse * NdotL;
if (NdotL > 0.0) {
light+=specular * light_specular * pow( eye_light, specular_exp );
}
#endif
diffuse.rgb = const_light_mult * ambient_light *diffuse.rgb + light * attenuation * shadow_attenuation;
#if defined(USE_OUTPUT_SHADOW_COLOR)
diffuse.rgb += light * shadow_color * attenuation * (1.0 - shadow_attenuation);
#endif
#ifdef USE_FOG
diffuse.rgb = mix(diffuse.rgb,fog_interp.rgb,fog_interp.a);
# if defined(LIGHT_TYPE_OMNI) || defined (LIGHT_TYPE_SPOT)
diffuse.rgb = mix(mix(vec3(0.0),diffuse.rgb,attenuation),diffuse.rgb,const_light_mult);
# endif
#endif
}
# endif
# if !defined(LIGHT_TYPE_DIRECTIONAL) && !defined(LIGHT_TYPE_OMNI) && !defined (LIGHT_TYPE_SPOT)
//none
#ifndef SHADELESS
diffuse.rgb=ambient_light *diffuse.rgb;
#endif
# endif
diffuse.rgb+=const_light_mult*emission;
#endif
#ifdef USE_VERTEX_LIGHTING
vec3 ambient = const_light_mult*ambient_light*diffuse.rgb;
# if defined(LIGHT_TYPE_OMNI) || defined (LIGHT_TYPE_SPOT)
// ambient*=diffuse_interp.a; //attenuation affects ambient too
# endif
// diffuse.rgb=(diffuse.rgb * diffuse_interp.rgb + specular * specular_interp)*shadow_attenuation + ambient;
// diffuse.rgb+=emission * const_light_mult;
diffuse.rgb=(diffuse.rgb * diffuse_interp.rgb + specular * specular_interp)*shadow_attenuation + ambient;
diffuse.rgb+=emission * const_light_mult;
#ifdef USE_FOG
diffuse.rgb = mix(diffuse.rgb,fog_interp.rgb,fog_interp.a);
# if defined(LIGHT_TYPE_OMNI) || defined (LIGHT_TYPE_SPOT)
diffuse.rgb = mix(mix(vec3(0.0),diffuse.rgb,diffuse_interp.a),diffuse.rgb,const_light_mult);
# endif
#endif
#endif
#if defined(ENABLE_AMBIENT_OCTREE) || defined(ENABLE_AMBIENT_LIGHTMAP) || defined(ENABLE_AMBIENT_DP_SAMPLER)
#if defined(ENABLE_AMBIENT_COLOR)
ambientmap_color*=ambient_color;
#endif
diffuse.rgb+=ambientmap_color;
#endif
#ifdef USE_SHADOW_PASS
#ifdef USE_DEPTH_SHADOWS
//do nothing, depth is just written
#else
// pack depth to rgba
//highp float bias = 0.0005;
highp float depth = ((position_interp.z / position_interp.w) + 1.0) * 0.5 + 0.0;//bias;
highp vec4 comp = fract(depth * vec4(256.0 * 256.0 * 256.0, 256.0 * 256.0, 256.0, 1.0));
comp -= comp.xxyz * vec4(0, 1.0 / 256.0, 1.0 / 256.0, 1.0 / 256.0);
gl_FragColor = comp;
#endif
#else
#ifdef USE_GLOW
diffuse.a=glow;
#endif
#ifdef USE_8BIT_HDR
diffuse.rgb*=0.25;
#endif
gl_FragColor = diffuse;
#endif
}
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