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Diffstat (limited to 'drivers/gles2/shaders/scene.glsl')
| -rw-r--r-- | drivers/gles2/shaders/scene.glsl | 2113 |
1 files changed, 2113 insertions, 0 deletions
diff --git a/drivers/gles2/shaders/scene.glsl b/drivers/gles2/shaders/scene.glsl new file mode 100644 index 0000000000..79b989be4a --- /dev/null +++ b/drivers/gles2/shaders/scene.glsl @@ -0,0 +1,2113 @@ +[vertex] + +#define M_PI 3.14159265359 + +/* +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 + + +/* INPUT ATTRIBS */ + +layout(location=0) in highp vec4 vertex_attrib; +layout(location=1) in vec3 normal_attrib; +#if defined(ENABLE_TANGENT_INTERP) || defined(ENABLE_NORMALMAP) || defined(LIGHT_USE_ANISOTROPY) +layout(location=2) in vec4 tangent_attrib; +#endif + +#if defined(ENABLE_COLOR_INTERP) +layout(location=3) in vec4 color_attrib; +#endif + +#if defined(ENABLE_UV_INTERP) +layout(location=4) in vec2 uv_attrib; +#endif + +#if defined(ENABLE_UV2_INTERP) +layout(location=5) in vec2 uv2_attrib; +#endif + +uniform float normal_mult; + +#ifdef USE_SKELETON +layout(location=6) in ivec4 bone_indices; // attrib:6 +layout(location=7) in vec4 bone_weights; // attrib:7 +#endif + +#ifdef USE_INSTANCING + +layout(location=8) in highp vec4 instance_xform0; +layout(location=9) in highp vec4 instance_xform1; +layout(location=10) in highp vec4 instance_xform2; +layout(location=11) in lowp vec4 instance_color; + +#if defined(ENABLE_INSTANCE_CUSTOM) +layout(location=12) in highp vec4 instance_custom_data; +#endif + +#endif + +layout(std140) uniform SceneData { //ubo:0 + + highp mat4 projection_matrix; + highp mat4 inv_projection_matrix; + highp mat4 camera_inverse_matrix; + highp mat4 camera_matrix; + + mediump vec4 ambient_light_color; + mediump vec4 bg_color; + + mediump vec4 fog_color_enabled; + mediump vec4 fog_sun_color_amount; + + mediump float ambient_energy; + mediump float bg_energy; + + mediump float z_offset; + mediump float z_slope_scale; + highp float shadow_dual_paraboloid_render_zfar; + highp float shadow_dual_paraboloid_render_side; + + highp vec2 viewport_size; + highp vec2 screen_pixel_size; + highp vec2 shadow_atlas_pixel_size; + highp vec2 directional_shadow_pixel_size; + + highp float time; + highp float z_far; + mediump float reflection_multiplier; + mediump float subsurface_scatter_width; + mediump float ambient_occlusion_affect_light; + + bool fog_depth_enabled; + highp float fog_depth_begin; + highp float fog_depth_curve; + bool fog_transmit_enabled; + highp float fog_transmit_curve; + bool fog_height_enabled; + highp float fog_height_min; + highp float fog_height_max; + highp float fog_height_curve; + +}; + +uniform highp mat4 world_transform; + + +#ifdef USE_LIGHT_DIRECTIONAL + +layout(std140) uniform DirectionalLightData { //ubo:3 + + highp vec4 light_pos_inv_radius; + mediump vec4 light_direction_attenuation; + mediump vec4 light_color_energy; + mediump vec4 light_params; //cone attenuation, angle, specular, shadow enabled, + mediump vec4 light_clamp; + mediump vec4 shadow_color_contact; + highp mat4 shadow_matrix1; + highp mat4 shadow_matrix2; + highp mat4 shadow_matrix3; + highp mat4 shadow_matrix4; + mediump vec4 shadow_split_offsets; +}; + +#endif + +#ifdef USE_VERTEX_LIGHTING +//omni and spot + +struct LightData { + + highp vec4 light_pos_inv_radius; + mediump vec4 light_direction_attenuation; + mediump vec4 light_color_energy; + mediump vec4 light_params; //cone attenuation, angle, specular, shadow enabled, + mediump vec4 light_clamp; + mediump vec4 shadow_color_contact; + highp mat4 shadow_matrix; + +}; + + +layout(std140) uniform OmniLightData { //ubo:4 + + LightData omni_lights[MAX_LIGHT_DATA_STRUCTS]; +}; + +layout(std140) uniform SpotLightData { //ubo:5 + + LightData spot_lights[MAX_LIGHT_DATA_STRUCTS]; +}; + +#ifdef USE_FORWARD_LIGHTING + + +uniform int omni_light_indices[MAX_FORWARD_LIGHTS]; +uniform int omni_light_count; + +uniform int spot_light_indices[MAX_FORWARD_LIGHTS]; +uniform int spot_light_count; + +#endif + +out vec4 diffuse_light_interp; +out vec4 specular_light_interp; + +void light_compute(vec3 N, vec3 L,vec3 V, vec3 light_color, float roughness, inout vec3 diffuse, inout vec3 specular) { + + float dotNL = max(dot(N,L), 0.0 ); + diffuse += dotNL * light_color / M_PI; + + if (roughness > 0.0) { + + vec3 H = normalize(V + L); + float dotNH = max(dot(N,H), 0.0 ); + float intensity = pow( dotNH, (1.0-roughness) * 256.0); + specular += light_color * intensity; + + } +} + +void light_process_omni(int idx, vec3 vertex, vec3 eye_vec,vec3 normal, float roughness,inout vec3 diffuse, inout vec3 specular) { + + vec3 light_rel_vec = omni_lights[idx].light_pos_inv_radius.xyz-vertex; + float light_length = length( light_rel_vec ); + float normalized_distance = light_length*omni_lights[idx].light_pos_inv_radius.w; + vec3 light_attenuation = vec3(pow( max(1.0 - normalized_distance, 0.0), omni_lights[idx].light_direction_attenuation.w )); + + light_compute(normal,normalize(light_rel_vec),eye_vec,omni_lights[idx].light_color_energy.rgb * light_attenuation,roughness,diffuse,specular); + +} + +void light_process_spot(int idx, vec3 vertex, vec3 eye_vec, vec3 normal, float roughness, inout vec3 diffuse, inout vec3 specular) { + + vec3 light_rel_vec = spot_lights[idx].light_pos_inv_radius.xyz-vertex; + float light_length = length( light_rel_vec ); + float normalized_distance = light_length*spot_lights[idx].light_pos_inv_radius.w; + vec3 light_attenuation = vec3(pow( max(1.0 - normalized_distance, 0.001), spot_lights[idx].light_direction_attenuation.w )); + vec3 spot_dir = spot_lights[idx].light_direction_attenuation.xyz; + float spot_cutoff=spot_lights[idx].light_params.y; + float scos = max(dot(-normalize(light_rel_vec), spot_dir),spot_cutoff); + float spot_rim = (1.0 - scos) / (1.0 - spot_cutoff); + light_attenuation *= 1.0 - pow( max(spot_rim,0.001), spot_lights[idx].light_params.x); + + + light_compute(normal,normalize(light_rel_vec),eye_vec,spot_lights[idx].light_color_energy.rgb*light_attenuation,roughness,diffuse,specular); +} + + +#endif + +/* Varyings */ + +out highp vec3 vertex_interp; +out vec3 normal_interp; + +#if defined(ENABLE_COLOR_INTERP) +out vec4 color_interp; +#endif + +#if defined(ENABLE_UV_INTERP) +out vec2 uv_interp; +#endif + +#if defined(ENABLE_UV2_INTERP) +out vec2 uv2_interp; +#endif + + +#if defined(ENABLE_TANGENT_INTERP) || defined(ENABLE_NORMALMAP) || defined(LIGHT_USE_ANISOTROPY) +out vec3 tangent_interp; +out vec3 binormal_interp; +#endif + + + + + +#if defined(USE_MATERIAL) + +layout(std140) uniform UniformData { //ubo:1 + +MATERIAL_UNIFORMS + +}; + +#endif + +VERTEX_SHADER_GLOBALS + +#ifdef RENDER_DEPTH_DUAL_PARABOLOID + +out highp float dp_clip; + +#endif + +#define SKELETON_TEXTURE_WIDTH 256 + +#ifdef USE_SKELETON +uniform highp sampler2D skeleton_texture; //texunit:-1 +#endif + +out highp vec4 position_interp; + +// FIXME: This triggers a Mesa bug that breaks rendering, so disabled for now. +// See GH-13450 and https://bugs.freedesktop.org/show_bug.cgi?id=100316 +//invariant gl_Position; + +void main() { + + highp vec4 vertex = vertex_attrib; // vec4(vertex_attrib.xyz * data_attrib.x,1.0); + + mat4 world_matrix = world_transform; + + +#ifdef USE_INSTANCING + + { + highp mat4 m=mat4(instance_xform0,instance_xform1,instance_xform2,vec4(0.0,0.0,0.0,1.0)); + world_matrix = world_matrix * transpose(m); + } +#endif + + vec3 normal = normal_attrib * normal_mult; + + +#if defined(ENABLE_TANGENT_INTERP) || defined(ENABLE_NORMALMAP) || defined(LIGHT_USE_ANISOTROPY) + vec3 tangent = tangent_attrib.xyz; + tangent*=normal_mult; + float binormalf = tangent_attrib.a; +#endif + +#if defined(ENABLE_COLOR_INTERP) + color_interp = color_attrib; +#if defined(USE_INSTANCING) + color_interp *= instance_color; +#endif + +#endif + +#ifdef USE_SKELETON + { + //skeleton transform + ivec2 tex_ofs = ivec2( bone_indices.x%256, (bone_indices.x/256)*3 ); + highp mat3x4 m = mat3x4( + texelFetch(skeleton_texture,tex_ofs,0), + texelFetch(skeleton_texture,tex_ofs+ivec2(0,1),0), + texelFetch(skeleton_texture,tex_ofs+ivec2(0,2),0) + ) * bone_weights.x; + + tex_ofs = ivec2( bone_indices.y%256, (bone_indices.y/256)*3 ); + + m+= mat3x4( + texelFetch(skeleton_texture,tex_ofs,0), + texelFetch(skeleton_texture,tex_ofs+ivec2(0,1),0), + texelFetch(skeleton_texture,tex_ofs+ivec2(0,2),0) + ) * bone_weights.y; + + tex_ofs = ivec2( bone_indices.z%256, (bone_indices.z/256)*3 ); + + m+= mat3x4( + texelFetch(skeleton_texture,tex_ofs,0), + texelFetch(skeleton_texture,tex_ofs+ivec2(0,1),0), + texelFetch(skeleton_texture,tex_ofs+ivec2(0,2),0) + ) * bone_weights.z; + + + tex_ofs = ivec2( bone_indices.w%256, (bone_indices.w/256)*3 ); + + m+= mat3x4( + texelFetch(skeleton_texture,tex_ofs,0), + texelFetch(skeleton_texture,tex_ofs+ivec2(0,1),0), + texelFetch(skeleton_texture,tex_ofs+ivec2(0,2),0) + ) * bone_weights.w; + + + vertex.xyz = vertex * m; + + normal = vec4(normal,0.0) * m; +#if defined(ENABLE_TANGENT_INTERP) || defined(ENABLE_NORMALMAP) || defined(LIGHT_USE_ANISOTROPY) + tangent.xyz = vec4(tangent.xyz,0.0) * m; +#endif + } +#endif + + +#if defined(ENABLE_TANGENT_INTERP) || defined(ENABLE_NORMALMAP) || defined(LIGHT_USE_ANISOTROPY) + + vec3 binormal = normalize( cross(normal,tangent) * binormalf ); +#endif + +#if defined(ENABLE_UV_INTERP) + uv_interp = uv_attrib; +#endif + +#if defined(ENABLE_UV2_INTERP) + uv2_interp = uv2_attrib; +#endif + +#if defined(USE_INSTANCING) && defined(ENABLE_INSTANCE_CUSTOM) + vec4 instance_custom = instance_custom_data; +#else + vec4 instance_custom = vec4(0.0); +#endif + + highp mat4 modelview = camera_inverse_matrix * world_matrix; + highp mat4 local_projection = projection_matrix; + +//using world coordinates +#if !defined(SKIP_TRANSFORM_USED) && defined(VERTEX_WORLD_COORDS_USED) + + vertex = world_matrix * vertex; + normal = normalize((world_matrix * vec4(normal,0.0)).xyz); + +#if defined(ENABLE_TANGENT_INTERP) || defined(ENABLE_NORMALMAP) || defined(LIGHT_USE_ANISOTROPY) + + tangent = normalize((world_matrix * vec4(tangent,0.0)).xyz); + binormal = normalize((world_matrix * vec4(binormal,0.0)).xyz); +#endif +#endif + + float roughness=0.0; + +//defines that make writing custom shaders easier +#define projection_matrix local_projection +#define world_transform world_matrix +{ + +VERTEX_SHADER_CODE + +} + + + +//using local coordinates (default) +#if !defined(SKIP_TRANSFORM_USED) && !defined(VERTEX_WORLD_COORDS_USED) + + vertex = modelview * vertex; + normal = normalize((modelview * vec4(normal,0.0)).xyz); + +#if defined(ENABLE_TANGENT_INTERP) || defined(ENABLE_NORMALMAP) || defined(LIGHT_USE_ANISOTROPY) + + tangent = normalize((modelview * vec4(tangent,0.0)).xyz); + binormal = normalize((modelview * vec4(binormal,0.0)).xyz); +#endif +#endif + +//using world coordinates +#if !defined(SKIP_TRANSFORM_USED) && defined(VERTEX_WORLD_COORDS_USED) + + vertex = camera_inverse_matrix * vertex; + normal = normalize((camera_inverse_matrix * vec4(normal,0.0)).xyz); + +#if defined(ENABLE_TANGENT_INTERP) || defined(ENABLE_NORMALMAP) || defined(LIGHT_USE_ANISOTROPY) + + tangent = normalize((camera_inverse_matrix * vec4(tangent,0.0)).xyz); + binormal = normalize((camera_inverse_matrix * vec4(binormal,0.0)).xyz); +#endif +#endif + + vertex_interp = vertex.xyz; + normal_interp = normal; + + +#if defined(ENABLE_TANGENT_INTERP) || defined(ENABLE_NORMALMAP) || defined(LIGHT_USE_ANISOTROPY) + tangent_interp = tangent; + binormal_interp = binormal; +#endif + + +#ifdef RENDER_DEPTH + + +#ifdef RENDER_DEPTH_DUAL_PARABOLOID + + vertex_interp.z*= shadow_dual_paraboloid_render_side; + normal_interp.z*= shadow_dual_paraboloid_render_side; + + dp_clip=vertex_interp.z; //this attempts to avoid noise caused by objects sent to the other parabolloid side due to bias + + //for dual paraboloid shadow mapping, this is the fastest but least correct way, as it curves straight edges + + highp vec3 vtx = vertex_interp+normalize(vertex_interp)*z_offset; + highp float distance = length(vtx); + vtx = normalize(vtx); + vtx.xy/=1.0-vtx.z; + vtx.z=(distance/shadow_dual_paraboloid_render_zfar); + vtx.z=vtx.z * 2.0 - 1.0; + + vertex.xyz=vtx; + vertex.w=1.0; + + +#else + + float z_ofs = z_offset; + z_ofs += (1.0-abs(normal_interp.z))*z_slope_scale; + vertex_interp.z-=z_ofs; + +#endif //RENDER_DEPTH_DUAL_PARABOLOID + +#endif //RENDER_DEPTH + + gl_Position = projection_matrix * vec4(vertex_interp,1.0); + + position_interp=gl_Position; + +#ifdef USE_VERTEX_LIGHTING + + diffuse_light_interp=vec4(0.0); + specular_light_interp=vec4(0.0); + +#ifdef USE_FORWARD_LIGHTING + + for(int i=0;i<omni_light_count;i++) { + light_process_omni(omni_light_indices[i],vertex_interp,-normalize( vertex_interp ),normal_interp,roughness,diffuse_light_interp.rgb,specular_light_interp.rgb); + } + + for(int i=0;i<spot_light_count;i++) { + light_process_spot(spot_light_indices[i],vertex_interp,-normalize( vertex_interp ),normal_interp,roughness,diffuse_light_interp.rgb,specular_light_interp.rgb); + } +#endif + +#ifdef USE_LIGHT_DIRECTIONAL + + vec3 directional_diffuse = vec3(0.0); + vec3 directional_specular = vec3(0.0); + light_compute(normal_interp,-light_direction_attenuation.xyz,-normalize( vertex_interp ),light_color_energy.rgb,roughness,directional_diffuse,directional_specular); + + float diff_avg = dot(diffuse_light_interp.rgb,vec3(0.33333)); + float diff_dir_avg = dot(directional_diffuse,vec3(0.33333)); + if (diff_avg>0.0) { + diffuse_light_interp.a=diff_dir_avg/(diff_avg+diff_dir_avg); + } else { + diffuse_light_interp.a=1.0; + } + + diffuse_light_interp.rgb+=directional_diffuse; + + float spec_avg = dot(specular_light_interp.rgb,vec3(0.33333)); + float spec_dir_avg = dot(directional_specular,vec3(0.33333)); + if (spec_avg>0.0) { + specular_light_interp.a=spec_dir_avg/(spec_avg+spec_dir_avg); + } else { + specular_light_interp.a=1.0; + } + + specular_light_interp.rgb+=directional_specular; + +#endif //USE_LIGHT_DIRECTIONAL + + +#endif // USE_VERTEX_LIGHTING + +} + + +[fragment] + +/* texture unit usage, N is max_texture_unity-N + +1-skeleton +2-radiance +3-reflection_atlas +4-directional_shadow +5-shadow_atlas +6-decal_atlas +7-screen +8-depth +9-probe1 +10-probe2 + +*/ + +uniform highp mat4 world_transform; + +#define M_PI 3.14159265359 + +/* Varyings */ + +#if defined(ENABLE_COLOR_INTERP) +in vec4 color_interp; +#endif + +#if defined(ENABLE_UV_INTERP) +in vec2 uv_interp; +#endif + +#if defined(ENABLE_UV2_INTERP) +in vec2 uv2_interp; +#endif + +#if defined(ENABLE_TANGENT_INTERP) || defined(ENABLE_NORMALMAP) || defined(LIGHT_USE_ANISOTROPY) +in vec3 tangent_interp; +in vec3 binormal_interp; +#endif + +in highp vec3 vertex_interp; +in vec3 normal_interp; + + +/* PBR CHANNELS */ + +//used on forward mainly +uniform bool no_ambient_light; + + + +#ifdef USE_RADIANCE_MAP + + + +layout(std140) uniform Radiance { //ubo:2 + + mat4 radiance_inverse_xform; + float radiance_ambient_contribution; + +}; + +#define RADIANCE_MAX_LOD 5.0 + +#ifdef USE_RADIANCE_MAP_ARRAY + +uniform sampler2DArray radiance_map; //texunit:-2 + +vec3 textureDualParaboloid(sampler2DArray p_tex, vec3 p_vec,float p_roughness) { + + vec3 norm = normalize(p_vec); + norm.xy/=1.0+abs(norm.z); + norm.xy=norm.xy * vec2(0.5,0.25) + vec2(0.5,0.25); + + // we need to lie the derivatives (normg) and assume that DP side is always the same + // to get proper texture filtering + vec2 normg=norm.xy; + if (norm.z>0.0) { + norm.y=0.5-norm.y+0.5; + } + + // thanks to OpenGL spec using floor(layer + 0.5) for texture arrays, + // it's easy to have precision errors using fract() to interpolate layers + // as such, using fixed point to ensure it works. + + float index = p_roughness * RADIANCE_MAX_LOD; + int indexi = int(index * 256.0); + vec3 base = textureGrad(p_tex, vec3(norm.xy, float(indexi/256)),dFdx(normg),dFdy(normg)).xyz; + vec3 next = textureGrad(p_tex, vec3(norm.xy, float(indexi/256+1)),dFdx(normg),dFdy(normg)).xyz; + return mix(base,next,float(indexi%256)/256.0); +} + +#else + +uniform sampler2D radiance_map; //texunit:-2 + +vec3 textureDualParaboloid(sampler2D p_tex, vec3 p_vec,float p_roughness) { + + vec3 norm = normalize(p_vec); + norm.xy/=1.0+abs(norm.z); + norm.xy=norm.xy * vec2(0.5,0.25) + vec2(0.5,0.25); + if (norm.z>0.0) { + norm.y=0.5-norm.y+0.5; + } + return textureLod(p_tex, norm.xy, p_roughness * RADIANCE_MAX_LOD).xyz; +} + +#endif + +#endif + +/* Material Uniforms */ + + + +#if defined(USE_MATERIAL) + +layout(std140) uniform UniformData { + +MATERIAL_UNIFORMS + +}; + +#endif + +FRAGMENT_SHADER_GLOBALS + +layout(std140) uniform SceneData { + + highp mat4 projection_matrix; + highp mat4 inv_projection_matrix; + highp mat4 camera_inverse_matrix; + highp mat4 camera_matrix; + + mediump vec4 ambient_light_color; + mediump vec4 bg_color; + + mediump vec4 fog_color_enabled; + mediump vec4 fog_sun_color_amount; + + mediump float ambient_energy; + mediump float bg_energy; + + mediump float z_offset; + mediump float z_slope_scale; + highp float shadow_dual_paraboloid_render_zfar; + highp float shadow_dual_paraboloid_render_side; + + highp vec2 viewport_size; + highp vec2 screen_pixel_size; + highp vec2 shadow_atlas_pixel_size; + highp vec2 directional_shadow_pixel_size; + + highp float time; + highp float z_far; + mediump float reflection_multiplier; + mediump float subsurface_scatter_width; + mediump float ambient_occlusion_affect_light; + + bool fog_depth_enabled; + highp float fog_depth_begin; + highp float fog_depth_curve; + bool fog_transmit_enabled; + highp float fog_transmit_curve; + bool fog_height_enabled; + highp float fog_height_min; + highp float fog_height_max; + highp float fog_height_curve; +}; + +//directional light data + +#ifdef USE_LIGHT_DIRECTIONAL + +layout(std140) uniform DirectionalLightData { + + highp vec4 light_pos_inv_radius; + mediump vec4 light_direction_attenuation; + mediump vec4 light_color_energy; + mediump vec4 light_params; //cone attenuation, angle, specular, shadow enabled, + mediump vec4 light_clamp; + mediump vec4 shadow_color_contact; + highp mat4 shadow_matrix1; + highp mat4 shadow_matrix2; + highp mat4 shadow_matrix3; + highp mat4 shadow_matrix4; + mediump vec4 shadow_split_offsets; +}; + + +uniform highp sampler2DShadow directional_shadow; //texunit:-4 + +#endif + +#ifdef USE_VERTEX_LIGHTING +in vec4 diffuse_light_interp; +in vec4 specular_light_interp; +#endif +//omni and spot + +struct LightData { + + highp vec4 light_pos_inv_radius; + mediump vec4 light_direction_attenuation; + mediump vec4 light_color_energy; + mediump vec4 light_params; //cone attenuation, angle, specular, shadow enabled, + mediump vec4 light_clamp; + mediump vec4 shadow_color_contact; + highp mat4 shadow_matrix; + +}; + + +layout(std140) uniform OmniLightData { //ubo:4 + + LightData omni_lights[MAX_LIGHT_DATA_STRUCTS]; +}; + +layout(std140) uniform SpotLightData { //ubo:5 + + LightData spot_lights[MAX_LIGHT_DATA_STRUCTS]; +}; + + +uniform highp sampler2DShadow shadow_atlas; //texunit:-5 + + +struct ReflectionData { + + mediump vec4 box_extents; + mediump vec4 box_offset; + mediump vec4 params; // intensity, 0, interior , boxproject + mediump vec4 ambient; //ambient color, energy + mediump vec4 atlas_clamp; + highp mat4 local_matrix; //up to here for spot and omni, rest is for directional + //notes: for ambientblend, use distance to edge to blend between already existing global environment +}; + +layout(std140) uniform ReflectionProbeData { //ubo:6 + + ReflectionData reflections[MAX_REFLECTION_DATA_STRUCTS]; +}; +uniform mediump sampler2D reflection_atlas; //texunit:-3 + + +#ifdef USE_FORWARD_LIGHTING + +uniform int omni_light_indices[MAX_FORWARD_LIGHTS]; +uniform int omni_light_count; + +uniform int spot_light_indices[MAX_FORWARD_LIGHTS]; +uniform int spot_light_count; + +uniform int reflection_indices[MAX_FORWARD_LIGHTS]; +uniform int reflection_count; + +#endif + + +#if defined(SCREEN_TEXTURE_USED) + +uniform highp sampler2D screen_texture; //texunit:-7 + +#endif + +#ifdef USE_MULTIPLE_RENDER_TARGETS + +layout(location=0) out vec4 diffuse_buffer; +layout(location=1) out vec4 specular_buffer; +layout(location=2) out vec4 normal_mr_buffer; +#if defined(ENABLE_SSS) +layout(location=3) out float sss_buffer; +#endif + +#else + +layout(location=0) out vec4 frag_color; + +#endif + +in highp vec4 position_interp; +uniform highp sampler2D depth_buffer; //texunit:-8 + +#ifdef USE_CONTACT_SHADOWS + +float contact_shadow_compute(vec3 pos, vec3 dir, float max_distance) { + + if (abs(dir.z)>0.99) + return 1.0; + + vec3 endpoint = pos+dir*max_distance; + vec4 source = position_interp; + vec4 dest = projection_matrix * vec4(endpoint, 1.0); + + vec2 from_screen = (source.xy / source.w) * 0.5 + 0.5; + vec2 to_screen = (dest.xy / dest.w) * 0.5 + 0.5; + + vec2 screen_rel = to_screen - from_screen; + + if (length(screen_rel)<0.00001) + return 1.0; //too small, don't do anything + + /*float pixel_size; //approximate pixel size + + if (screen_rel.x > screen_rel.y) { + + pixel_size = abs((pos.x-endpoint.x)/(screen_rel.x/screen_pixel_size.x)); + } else { + pixel_size = abs((pos.y-endpoint.y)/(screen_rel.y/screen_pixel_size.y)); + + }*/ + vec4 bias = projection_matrix * vec4(pos+vec3(0.0,0.0,0.04), 1.0); //todo un-harcode the 0.04 + + + + vec2 pixel_incr = normalize(screen_rel)*screen_pixel_size; + + + float steps = length(screen_rel) / length(pixel_incr); + steps = min(2000.0,steps); //put a limit to avoid freezing in some strange situation + //steps=10.0; + + vec4 incr = (dest - source)/steps; + float ratio=0.0; + float ratio_incr = 1.0/steps; + + while(steps>0.0) { + source += incr*2.0; + bias+=incr*2.0; + + vec3 uv_depth = (source.xyz / source.w) * 0.5 + 0.5; + float depth = texture(depth_buffer,uv_depth.xy).r; + + if (depth < uv_depth.z) { + if (depth > (bias.z/bias.w) * 0.5 + 0.5) { + return min(pow(ratio,4.0),1.0); + } else { + return 1.0; + } + } + + + ratio+=ratio_incr; + steps-=1.0; + } + + return 1.0; +} + +#endif + + +// This returns the G_GGX function divided by 2 cos_theta_m, where in practice cos_theta_m is either N.L or N.V. +// We're dividing this factor off because the overall term we'll end up looks like +// (see, for example, the first unnumbered equation in B. Burley, "Physically Based Shading at Disney", SIGGRAPH 2012): +// +// F(L.V) D(N.H) G(N.L) G(N.V) / (4 N.L N.V) +// +// We're basically regouping this as +// +// F(L.V) D(N.H) [G(N.L)/(2 N.L)] [G(N.V) / (2 N.V)] +// +// and thus, this function implements the [G(N.m)/(2 N.m)] part with m = L or V. +// +// The contents of the D and G (G1) functions (GGX) are taken from +// E. Heitz, "Understanding the Masking-Shadowing Function in Microfacet-Based BRDFs", J. Comp. Graph. Tech. 3 (2) (2014). +// Eqns 71-72 and 85-86 (see also Eqns 43 and 80). + +float G_GGX_2cos(float cos_theta_m, float alpha) { + // Schlick's approximation + // C. Schlick, "An Inexpensive BRDF Model for Physically-based Rendering", Computer Graphics Forum. 13 (3): 233 (1994) + // Eq. (19), although see Heitz (2014) the about the problems with his derivation. + // It nevertheless approximates GGX well with k = alpha/2. + float k = 0.5*alpha; + return 0.5 / (cos_theta_m * (1.0 - k) + k); + + // float cos2 = cos_theta_m*cos_theta_m; + // float sin2 = (1.0-cos2); + // return 1.0 /( cos_theta_m + sqrt(cos2 + alpha*alpha*sin2) ); +} + +float D_GGX(float cos_theta_m, float alpha) { + float alpha2 = alpha*alpha; + float d = 1.0 + (alpha2-1.0)*cos_theta_m*cos_theta_m; + return alpha2/(M_PI * d * d); +} + +float G_GGX_anisotropic_2cos(float cos_theta_m, float alpha_x, float alpha_y, float cos_phi, float sin_phi) { + float cos2 = cos_theta_m * cos_theta_m; + float sin2 = (1.0-cos2); + float s_x = alpha_x * cos_phi; + float s_y = alpha_y * sin_phi; + return 1.0 / (cos_theta_m + sqrt(cos2 + (s_x*s_x + s_y*s_y)*sin2 )); +} + +float D_GGX_anisotropic(float cos_theta_m, float alpha_x, float alpha_y, float cos_phi, float sin_phi) { + float cos2 = cos_theta_m * cos_theta_m; + float sin2 = (1.0-cos2); + float r_x = cos_phi/alpha_x; + float r_y = sin_phi/alpha_y; + float d = cos2 + sin2*(r_x * r_x + r_y * r_y); + return 1.0 / (M_PI * alpha_x * alpha_y * d * d ); +} + + +float SchlickFresnel(float u) +{ + float m = 1.0-u; + float m2 = m*m; + return m2*m2*m; // pow(m,5) +} + +float GTR1(float NdotH, float a) +{ + if (a >= 1.0) return 1.0/M_PI; + float a2 = a*a; + float t = 1.0 + (a2-1.0)*NdotH*NdotH; + return (a2-1.0) / (M_PI*log(a2)*t); +} + +vec3 metallic_to_specular_color(float metallic, float specular, vec3 albedo) { + float dielectric = (0.034 * 2.0) * specular; + // energy conservation + return mix(vec3(dielectric), albedo, metallic); // TODO: reference? +} + +void light_compute(vec3 N, vec3 L, vec3 V, vec3 B, vec3 T, vec3 light_color, vec3 attenuation, vec3 diffuse_color, vec3 transmission, float specular_blob_intensity, float roughness, float metallic, float rim, float rim_tint, float clearcoat, float clearcoat_gloss, float anisotropy, inout vec3 diffuse_light, inout vec3 specular_light) { + +#if defined(USE_LIGHT_SHADER_CODE) +//light is written by the light shader + + vec3 normal = N; + vec3 albedo = diffuse_color; + vec3 light = L; + vec3 view = V; + +LIGHT_SHADER_CODE + + +#else + float NdotL = dot(N,L); + float cNdotL = max(NdotL, 0.0); // clamped NdotL + float NdotV = dot(N, V); + float cNdotV = max(NdotV, 0.0); + + if (metallic < 1.0) { +#if defined(DIFFUSE_OREN_NAYAR) + vec3 diffuse_brdf_NL; +#else + float diffuse_brdf_NL; // BRDF times N.L for calculating diffuse radiance +#endif + + +#if defined(DIFFUSE_LAMBERT_WRAP) + //energy conserving lambert wrap shader + diffuse_brdf_NL = max(0.0,(NdotL + roughness) / ((1.0 + roughness) * (1.0 + roughness))); + +#elif defined(DIFFUSE_OREN_NAYAR) + + { + // see http://mimosa-pudica.net/improved-oren-nayar.html + float LdotV = dot(L, V); + + + float s = LdotV - NdotL * NdotV; + float t = mix(1.0, max(NdotL, NdotV), step(0.0, s)); + + float sigma2 = roughness * roughness; // TODO: this needs checking + vec3 A = 1.0 + sigma2 * (- 0.5 / (sigma2 + 0.33) + 0.17*diffuse_color / (sigma2 + 0.13) ); + float B = 0.45 * sigma2 / (sigma2 + 0.09); + + diffuse_brdf_NL = cNdotL * (A + vec3(B) * s / t) * (1.0 / M_PI); + } + +#elif defined(DIFFUSE_TOON) + + diffuse_brdf_NL = smoothstep(-roughness,max(roughness,0.01),NdotL); + +#elif defined(DIFFUSE_BURLEY) + + { + + + vec3 H = normalize(V + L); + float cLdotH = max(0.0,dot(L, H)); + + float FD90 = 0.5 + 2.0 * cLdotH * cLdotH * roughness; + float FdV = 1.0 + (FD90 - 1.0) * SchlickFresnel(cNdotV); + float FdL = 1.0 + (FD90 - 1.0) * SchlickFresnel(cNdotL); + diffuse_brdf_NL = (1.0 / M_PI) * FdV * FdL * cNdotL; + /* + float energyBias = mix(roughness, 0.0, 0.5); + float energyFactor = mix(roughness, 1.0, 1.0 / 1.51); + float fd90 = energyBias + 2.0 * VoH * VoH * roughness; + float f0 = 1.0; + float lightScatter = f0 + (fd90 - f0) * pow(1.0 - cNdotL, 5.0); + float viewScatter = f0 + (fd90 - f0) * pow(1.0 - cNdotV, 5.0); + + diffuse_brdf_NL = lightScatter * viewScatter * energyFactor;*/ + } +#else + //lambert + diffuse_brdf_NL = cNdotL * (1.0 / M_PI); +#endif + +#if defined(TRANSMISSION_USED) + diffuse_light += light_color * diffuse_color * mix(vec3(diffuse_brdf_NL), vec3(M_PI), transmission) * attenuation; +#else + diffuse_light += light_color * diffuse_color * diffuse_brdf_NL * attenuation; +#endif + + + +#if defined(LIGHT_USE_RIM) + float rim_light = pow(1.0-cNdotV, (1.0-roughness)*16.0); + diffuse_light += rim_light * rim * mix(vec3(1.0),diffuse_color,rim_tint) * light_color; +#endif + } + + + if (roughness > 0.0) { // FIXME: roughness == 0 should not disable specular light entirely + + + // D + +#if defined(SPECULAR_BLINN) + + vec3 H = normalize(V + L); + float cNdotH = max(dot(N,H), 0.0 ); + float intensity = pow( cNdotH, (1.0-roughness) * 256.0); + specular_light += light_color * intensity * specular_blob_intensity * attenuation; + +#elif defined(SPECULAR_PHONG) + + vec3 R = normalize(-reflect(L,N)); + float cRdotV = max(0.0,dot(R,V)); + float intensity = pow( cRdotV, (1.0-roughness) * 256.0); + specular_light += light_color * intensity * specular_blob_intensity * attenuation; + +#elif defined(SPECULAR_TOON) + + vec3 R = normalize(-reflect(L,N)); + float RdotV = dot(R,V); + float mid = 1.0-roughness; + mid*=mid; + float intensity = smoothstep(mid-roughness*0.5, mid+roughness*0.5, RdotV) * mid; + diffuse_light += light_color * intensity * specular_blob_intensity * attenuation; // write to diffuse_light, as in toon shading you generally want no reflection + +#elif defined(SPECULAR_DISABLED) + //none.. + +#elif defined(SPECULAR_SCHLICK_GGX) + // shlick+ggx as default + + vec3 H = normalize(V + L); + + float cNdotH = max(dot(N,H), 0.0); + float cLdotH = max(dot(L,H), 0.0); + +# if defined(LIGHT_USE_ANISOTROPY) + + float aspect = sqrt(1.0-anisotropy*0.9); + float rx = roughness/aspect; + float ry = roughness*aspect; + float ax = rx*rx; + float ay = ry*ry; + float XdotH = dot( T, H ); + float YdotH = dot( B, H ); + float D = D_GGX_anisotropic(cNdotH, ax, ay, XdotH, YdotH); + float G = G_GGX_anisotropic_2cos(cNdotL, ax, ay, XdotH, YdotH) * G_GGX_anisotropic_2cos(cNdotV, ax, ay, XdotH, YdotH); + +# else + float alpha = roughness * roughness; + float D = D_GGX(cNdotH, alpha); + float G = G_GGX_2cos(cNdotL, alpha) * G_GGX_2cos(cNdotV, alpha); +# endif + // F + float F0 = 1.0; // FIXME + float cLdotH5 = SchlickFresnel(cLdotH); + float F = mix(cLdotH5, 1.0, F0); + + float specular_brdf_NL = cNdotL * D * F * G; + + specular_light += specular_brdf_NL * light_color * specular_blob_intensity * attenuation; +#endif + +#if defined(LIGHT_USE_CLEARCOAT) + if (clearcoat_gloss > 0.0) { +# if !defined(SPECULAR_SCHLICK_GGX) && !defined(SPECULAR_BLINN) + vec3 H = normalize(V + L); +# endif +# if !defined(SPECULAR_SCHLICK_GGX) + float cNdotH = max(dot(N,H), 0.0); + float cLdotH = max(dot(L,H), 0.0); + float cLdotH5 = SchlickFresnel(cLdotH); +#endif + float Dr = GTR1(cNdotH, mix(.1, .001, clearcoat_gloss)); + float Fr = mix(.04, 1.0, cLdotH5); + float Gr = G_GGX_2cos(cNdotL, .25) * G_GGX_2cos(cNdotV, .25); + + + float specular_brdf_NL = 0.25 * clearcoat * Gr * Fr * Dr * cNdotL; + + specular_light += specular_brdf_NL * light_color * specular_blob_intensity * attenuation; + } +#endif + } + + +#endif //defined(USE_LIGHT_SHADER_CODE) +} + + +float sample_shadow(highp sampler2DShadow shadow, vec2 shadow_pixel_size, vec2 pos, float depth, vec4 clamp_rect) { + +#ifdef SHADOW_MODE_PCF_13 + + float avg=textureProj(shadow,vec4(pos,depth,1.0)); + avg+=textureProj(shadow,vec4(pos+vec2(shadow_pixel_size.x,0.0),depth,1.0)); + avg+=textureProj(shadow,vec4(pos+vec2(-shadow_pixel_size.x,0.0),depth,1.0)); + avg+=textureProj(shadow,vec4(pos+vec2(0.0,shadow_pixel_size.y),depth,1.0)); + avg+=textureProj(shadow,vec4(pos+vec2(0.0,-shadow_pixel_size.y),depth,1.0)); + avg+=textureProj(shadow,vec4(pos+vec2(shadow_pixel_size.x,shadow_pixel_size.y),depth,1.0)); + avg+=textureProj(shadow,vec4(pos+vec2(-shadow_pixel_size.x,shadow_pixel_size.y),depth,1.0)); + avg+=textureProj(shadow,vec4(pos+vec2(shadow_pixel_size.x,-shadow_pixel_size.y),depth,1.0)); + avg+=textureProj(shadow,vec4(pos+vec2(-shadow_pixel_size.x,-shadow_pixel_size.y),depth,1.0)); + avg+=textureProj(shadow,vec4(pos+vec2(shadow_pixel_size.x*2.0,0.0),depth,1.0)); + avg+=textureProj(shadow,vec4(pos+vec2(-shadow_pixel_size.x*2.0,0.0),depth,1.0)); + avg+=textureProj(shadow,vec4(pos+vec2(0.0,shadow_pixel_size.y*2.0),depth,1.0)); + avg+=textureProj(shadow,vec4(pos+vec2(0.0,-shadow_pixel_size.y*2.0),depth,1.0)); + return avg*(1.0/13.0); + +#elif defined(SHADOW_MODE_PCF_5) + + float avg=textureProj(shadow,vec4(pos,depth,1.0)); + avg+=textureProj(shadow,vec4(pos+vec2(shadow_pixel_size.x,0.0),depth,1.0)); + avg+=textureProj(shadow,vec4(pos+vec2(-shadow_pixel_size.x,0.0),depth,1.0)); + avg+=textureProj(shadow,vec4(pos+vec2(0.0,shadow_pixel_size.y),depth,1.0)); + avg+=textureProj(shadow,vec4(pos+vec2(0.0,-shadow_pixel_size.y),depth,1.0)); + return avg*(1.0/5.0); + +#else + + return textureProj(shadow,vec4(pos,depth,1.0)); + +#endif + +} + +#ifdef RENDER_DEPTH_DUAL_PARABOLOID + +in highp float dp_clip; + +#endif + + + +#if 0 +//need to save texture depth for this + +vec3 light_transmittance(float translucency,vec3 light_vec, vec3 normal, vec3 pos, float distance) { + + float scale = 8.25 * (1.0 - translucency) / subsurface_scatter_width; + float d = scale * distance; + + /** + * Armed with the thickness, we can now calculate the color by means of the + * precalculated transmittance profile. + * (It can be precomputed into a texture, for maximum performance): + */ + float dd = -d * d; + vec3 profile = vec3(0.233, 0.455, 0.649) * exp(dd / 0.0064) + + vec3(0.1, 0.336, 0.344) * exp(dd / 0.0484) + + vec3(0.118, 0.198, 0.0) * exp(dd / 0.187) + + vec3(0.113, 0.007, 0.007) * exp(dd / 0.567) + + vec3(0.358, 0.004, 0.0) * exp(dd / 1.99) + + vec3(0.078, 0.0, 0.0) * exp(dd / 7.41); + + /** + * Using the profile, we finally approximate the transmitted lighting from + * the back of the object: + */ + return profile * clamp(0.3 + dot(light_vec, normal),0.0,1.0); +} +#endif + +void light_process_omni(int idx, vec3 vertex, vec3 eye_vec,vec3 normal,vec3 binormal, vec3 tangent, vec3 albedo, vec3 transmission, float roughness, float metallic, float rim, float rim_tint, float clearcoat, float clearcoat_gloss, float anisotropy, float p_blob_intensity, inout vec3 diffuse_light, inout vec3 specular_light) { + + vec3 light_rel_vec = omni_lights[idx].light_pos_inv_radius.xyz-vertex; + float light_length = length( light_rel_vec ); + float normalized_distance = light_length*omni_lights[idx].light_pos_inv_radius.w; + vec3 light_attenuation = vec3(pow( max(1.0 - normalized_distance, 0.0), omni_lights[idx].light_direction_attenuation.w )); + + if (omni_lights[idx].light_params.w>0.5) { + //there is a shadowmap + + highp vec3 splane=(omni_lights[idx].shadow_matrix * vec4(vertex,1.0)).xyz; + float shadow_len=length(splane); + splane=normalize(splane); + vec4 clamp_rect=omni_lights[idx].light_clamp; + + if (splane.z>=0.0) { + + splane.z+=1.0; + + clamp_rect.y+=clamp_rect.w; + + } else { + + splane.z=1.0 - splane.z; + + /* + if (clamp_rect.z<clamp_rect.w) { + clamp_rect.x+=clamp_rect.z; + } else { + clamp_rect.y+=clamp_rect.w; + } + */ + + } + + splane.xy/=splane.z; + splane.xy=splane.xy * 0.5 + 0.5; + splane.z = shadow_len * omni_lights[idx].light_pos_inv_radius.w; + + splane.xy = clamp_rect.xy+splane.xy*clamp_rect.zw; + float shadow = sample_shadow(shadow_atlas,shadow_atlas_pixel_size,splane.xy,splane.z,clamp_rect); + +#ifdef USE_CONTACT_SHADOWS + + if (shadow>0.01 && omni_lights[idx].shadow_color_contact.a>0.0) { + + float contact_shadow = contact_shadow_compute(vertex,normalize(light_rel_vec),min(light_length,omni_lights[idx].shadow_color_contact.a)); + shadow=min(shadow,contact_shadow); + + } +#endif + light_attenuation*=mix(omni_lights[idx].shadow_color_contact.rgb,vec3(1.0),shadow); + } + + light_compute(normal,normalize(light_rel_vec),eye_vec,binormal,tangent,omni_lights[idx].light_color_energy.rgb,light_attenuation,albedo,transmission,omni_lights[idx].light_params.z*p_blob_intensity,roughness,metallic,rim,rim_tint,clearcoat,clearcoat_gloss,anisotropy,diffuse_light,specular_light); + +} + +void light_process_spot(int idx, vec3 vertex, vec3 eye_vec, vec3 normal, vec3 binormal, vec3 tangent,vec3 albedo, vec3 transmission,float roughness, float metallic, float rim, float rim_tint, float clearcoat, float clearcoat_gloss,float anisotropy,float p_blob_intensity, inout vec3 diffuse_light, inout vec3 specular_light) { + + vec3 light_rel_vec = spot_lights[idx].light_pos_inv_radius.xyz-vertex; + float light_length = length( light_rel_vec ); + float normalized_distance = light_length*spot_lights[idx].light_pos_inv_radius.w; + vec3 light_attenuation = vec3(pow( max(1.0 - normalized_distance, 0.001), spot_lights[idx].light_direction_attenuation.w )); + vec3 spot_dir = spot_lights[idx].light_direction_attenuation.xyz; + float spot_cutoff=spot_lights[idx].light_params.y; + float scos = max(dot(-normalize(light_rel_vec), spot_dir),spot_cutoff); + float spot_rim = (1.0 - scos) / (1.0 - spot_cutoff); + light_attenuation *= 1.0 - pow( max(spot_rim,0.001), spot_lights[idx].light_params.x); + + if (spot_lights[idx].light_params.w>0.5) { + //there is a shadowmap + highp vec4 splane=(spot_lights[idx].shadow_matrix * vec4(vertex,1.0)); + splane.xyz/=splane.w; + + float shadow = sample_shadow(shadow_atlas,shadow_atlas_pixel_size,splane.xy,splane.z,spot_lights[idx].light_clamp); + +#ifdef USE_CONTACT_SHADOWS + if (shadow>0.01 && spot_lights[idx].shadow_color_contact.a>0.0) { + + float contact_shadow = contact_shadow_compute(vertex,normalize(light_rel_vec),min(light_length,spot_lights[idx].shadow_color_contact.a)); + shadow=min(shadow,contact_shadow); + + } +#endif + light_attenuation*=mix(spot_lights[idx].shadow_color_contact.rgb,vec3(1.0),shadow); + } + + light_compute(normal,normalize(light_rel_vec),eye_vec,binormal,tangent,spot_lights[idx].light_color_energy.rgb,light_attenuation,albedo,transmission,spot_lights[idx].light_params.z*p_blob_intensity,roughness,metallic,rim,rim_tint,clearcoat,clearcoat_gloss,anisotropy,diffuse_light,specular_light); + +} + +void reflection_process(int idx, vec3 vertex, vec3 normal,vec3 binormal, vec3 tangent,float roughness,float anisotropy,vec3 ambient,vec3 skybox, inout highp vec4 reflection_accum,inout highp vec4 ambient_accum) { + + vec3 ref_vec = normalize(reflect(vertex,normal)); + vec3 local_pos = (reflections[idx].local_matrix * vec4(vertex,1.0)).xyz; + vec3 box_extents = reflections[idx].box_extents.xyz; + + if (any(greaterThan(abs(local_pos),box_extents))) { //out of the reflection box + return; + } + + vec3 inner_pos = abs(local_pos / box_extents); + float blend = max(inner_pos.x,max(inner_pos.y,inner_pos.z)); + //make blend more rounded + blend=mix(length(inner_pos),blend,blend); + blend*=blend; + blend=1.001-blend; + + if (reflections[idx].params.x>0.0){// compute reflection + + vec3 local_ref_vec = (reflections[idx].local_matrix * vec4(ref_vec,0.0)).xyz; + + if (reflections[idx].params.w > 0.5) { //box project + + vec3 nrdir = normalize(local_ref_vec); + vec3 rbmax = (box_extents - local_pos)/nrdir; + vec3 rbmin = (-box_extents - local_pos)/nrdir; + + + vec3 rbminmax = mix(rbmin,rbmax,greaterThan(nrdir,vec3(0.0,0.0,0.0))); + + float fa = min(min(rbminmax.x, rbminmax.y), rbminmax.z); + vec3 posonbox = local_pos + nrdir * fa; + local_ref_vec = posonbox - reflections[idx].box_offset.xyz; + } + + + vec4 clamp_rect=reflections[idx].atlas_clamp; + vec3 norm = normalize(local_ref_vec); + norm.xy/=1.0+abs(norm.z); + norm.xy=norm.xy * vec2(0.5,0.25) + vec2(0.5,0.25); + if (norm.z>0.0) { + norm.y=0.5-norm.y+0.5; + } + + vec2 atlas_uv = norm.xy * clamp_rect.zw + clamp_rect.xy; + atlas_uv = clamp(atlas_uv,clamp_rect.xy,clamp_rect.xy+clamp_rect.zw); + + highp vec4 reflection; + reflection.rgb = textureLod(reflection_atlas,atlas_uv,roughness*5.0).rgb; + + if (reflections[idx].params.z < 0.5) { + reflection.rgb = mix(skybox,reflection.rgb,blend); + } + reflection.rgb*=reflections[idx].params.x; + reflection.a = blend; + reflection.rgb*=reflection.a; + + reflection_accum+=reflection; + } + + if (reflections[idx].ambient.a>0.0) { //compute ambient using skybox + + + vec3 local_amb_vec = (reflections[idx].local_matrix * vec4(normal,0.0)).xyz; + + vec3 splane=normalize(local_amb_vec); + vec4 clamp_rect=reflections[idx].atlas_clamp; + + splane.z*=-1.0; + if (splane.z>=0.0) { + splane.z+=1.0; + clamp_rect.y+=clamp_rect.w; + } else { + splane.z=1.0 - splane.z; + splane.y=-splane.y; + } + + splane.xy/=splane.z; + splane.xy=splane.xy * 0.5 + 0.5; + + splane.xy = splane.xy * clamp_rect.zw + clamp_rect.xy; + splane.xy = clamp(splane.xy,clamp_rect.xy,clamp_rect.xy+clamp_rect.zw); + + highp vec4 ambient_out; + ambient_out.a=blend; + ambient_out.rgb = textureLod(reflection_atlas,splane.xy,5.0).rgb; + ambient_out.rgb=mix(reflections[idx].ambient.rgb,ambient_out.rgb,reflections[idx].ambient.a); + if (reflections[idx].params.z < 0.5) { + ambient_out.rgb = mix(ambient,ambient_out.rgb,blend); + } + + ambient_out.rgb *= ambient_out.a; + ambient_accum+=ambient_out; + } else { + + highp vec4 ambient_out; + ambient_out.a=blend; + ambient_out.rgb=reflections[idx].ambient.rgb; + if (reflections[idx].params.z < 0.5) { + ambient_out.rgb = mix(ambient,ambient_out.rgb,blend); + } + ambient_out.rgb *= ambient_out.a; + ambient_accum+=ambient_out; + + } +} + +#ifdef USE_GI_PROBES + +uniform mediump sampler3D gi_probe1; //texunit:-9 +uniform highp mat4 gi_probe_xform1; +uniform highp vec3 gi_probe_bounds1; +uniform highp vec3 gi_probe_cell_size1; +uniform highp float gi_probe_multiplier1; +uniform highp float gi_probe_bias1; +uniform highp float gi_probe_normal_bias1; +uniform bool gi_probe_blend_ambient1; + +uniform mediump sampler3D gi_probe2; //texunit:-10 +uniform highp mat4 gi_probe_xform2; +uniform highp vec3 gi_probe_bounds2; +uniform highp vec3 gi_probe_cell_size2; +uniform highp float gi_probe_multiplier2; +uniform highp float gi_probe_bias2; +uniform highp float gi_probe_normal_bias2; +uniform bool gi_probe2_enabled; +uniform bool gi_probe_blend_ambient2; + +vec3 voxel_cone_trace(mediump sampler3D probe, vec3 cell_size, vec3 pos, vec3 ambient, bool blend_ambient, vec3 direction, float tan_half_angle, float max_distance, float p_bias) { + + float dist = p_bias;//1.0; //dot(direction,mix(vec3(-1.0),vec3(1.0),greaterThan(direction,vec3(0.0))))*2.0; + float alpha=0.0; + vec3 color = vec3(0.0); + + while(dist < max_distance && alpha < 0.95) { + float diameter = max(1.0, 2.0 * tan_half_angle * dist); + vec4 scolor = textureLod(probe, (pos + dist * direction) * cell_size, log2(diameter) ); + float a = (1.0 - alpha); + color += scolor.rgb * a; + alpha += a * scolor.a; + dist += diameter * 0.5; + } + + if (blend_ambient) { + color.rgb = mix(ambient,color.rgb,min(1.0,alpha/0.95)); + } + + return color; +} + +void gi_probe_compute(mediump sampler3D probe, mat4 probe_xform, vec3 bounds,vec3 cell_size,vec3 pos, vec3 ambient, vec3 environment, bool blend_ambient,float multiplier, mat3 normal_mtx,vec3 ref_vec, float roughness,float p_bias,float p_normal_bias, inout vec4 out_spec, inout vec4 out_diff) { + + + + vec3 probe_pos = (probe_xform * vec4(pos,1.0)).xyz; + vec3 ref_pos = (probe_xform * vec4(pos+ref_vec,1.0)).xyz; + ref_vec = normalize(ref_pos - probe_pos); + + probe_pos+=(probe_xform * vec4(normal_mtx[2],0.0)).xyz*p_normal_bias; + +/* out_diff.rgb = voxel_cone_trace(probe,cell_size,probe_pos,normalize((probe_xform * vec4(ref_vec,0.0)).xyz),0.0 ,100.0); + out_diff.a = 1.0; + return;*/ + //out_diff = vec4(textureLod(probe,probe_pos*cell_size,3.0).rgb,1.0); + //return; + + //this causes corrupted pixels, i have no idea why.. + if (any(bvec2(any(lessThan(probe_pos,vec3(0.0))),any(greaterThan(probe_pos,bounds))))) { + return; + } + + //vec3 blendv = probe_pos/bounds * 2.0 - 1.0; + //float blend = 1.001-max(blendv.x,max(blendv.y,blendv.z)); + float blend=1.0; + + float max_distance = length(bounds); + + //radiance +#ifdef VCT_QUALITY_HIGH + +#define MAX_CONE_DIRS 6 + vec3 cone_dirs[MAX_CONE_DIRS] = vec3[] ( + vec3(0, 0, 1), + vec3(0.866025, 0, 0.5), + vec3(0.267617, 0.823639, 0.5), + vec3(-0.700629, 0.509037, 0.5), + vec3(-0.700629, -0.509037, 0.5), + vec3(0.267617, -0.823639, 0.5) + ); + + float cone_weights[MAX_CONE_DIRS] = float[](0.25, 0.15, 0.15, 0.15, 0.15, 0.15); + float cone_angle_tan = 0.577; + float min_ref_tan = 0.0; +#else + +#define MAX_CONE_DIRS 4 + + vec3 cone_dirs[MAX_CONE_DIRS] = vec3[] ( + vec3(0.707107, 0, 0.707107), + vec3(0, 0.707107, 0.707107), + vec3(-0.707107, 0, 0.707107), + vec3(0, -0.707107, 0.707107) + ); + + float cone_weights[MAX_CONE_DIRS] = float[](0.25, 0.25, 0.25, 0.25); + float cone_angle_tan = 0.98269; + max_distance*=0.5; + float min_ref_tan = 0.2; + +#endif + vec3 light=vec3(0.0); + for(int i=0;i<MAX_CONE_DIRS;i++) { + + vec3 dir = normalize( (probe_xform * vec4(pos + normal_mtx * cone_dirs[i],1.0)).xyz - probe_pos); + light+=cone_weights[i] * voxel_cone_trace(probe,cell_size,probe_pos,ambient,blend_ambient,dir,cone_angle_tan,max_distance,p_bias); + + } + + light*=multiplier; + + out_diff += vec4(light*blend,blend); + + //irradiance + + vec3 irr_light = voxel_cone_trace(probe,cell_size,probe_pos,environment,blend_ambient,ref_vec,max(min_ref_tan,tan(roughness * 0.5 * M_PI)) ,max_distance,p_bias); + + irr_light *= multiplier; + //irr_light=vec3(0.0); + + out_spec += vec4(irr_light*blend,blend); + +} + + +void gi_probes_compute(vec3 pos, vec3 normal, float roughness, inout vec3 out_specular, inout vec3 out_ambient) { + + roughness = roughness * roughness; + + vec3 ref_vec = normalize(reflect(normalize(pos),normal)); + + //find arbitrary tangent and bitangent, then build a matrix + vec3 v0 = abs(normal.z) < 0.999 ? vec3(0, 0, 1) : vec3(0, 1, 0); + vec3 tangent = normalize(cross(v0, normal)); + vec3 bitangent = normalize(cross(tangent, normal)); + mat3 normal_mat = mat3(tangent,bitangent,normal); + + vec4 diff_accum = vec4(0.0); + vec4 spec_accum = vec4(0.0); + + vec3 ambient = out_ambient; + out_ambient = vec3(0.0); + + vec3 environment = out_specular; + + out_specular = vec3(0.0); + + gi_probe_compute(gi_probe1,gi_probe_xform1,gi_probe_bounds1,gi_probe_cell_size1,pos,ambient,environment,gi_probe_blend_ambient1,gi_probe_multiplier1,normal_mat,ref_vec,roughness,gi_probe_bias1,gi_probe_normal_bias1,spec_accum,diff_accum); + + if (gi_probe2_enabled) { + + gi_probe_compute(gi_probe2,gi_probe_xform2,gi_probe_bounds2,gi_probe_cell_size2,pos,ambient,environment,gi_probe_blend_ambient2,gi_probe_multiplier2,normal_mat,ref_vec,roughness,gi_probe_bias2,gi_probe_normal_bias2,spec_accum,diff_accum); + } + + if (diff_accum.a>0.0) { + diff_accum.rgb/=diff_accum.a; + } + + if (spec_accum.a>0.0) { + spec_accum.rgb/=spec_accum.a; + } + + out_specular+=spec_accum.rgb; + out_ambient+=diff_accum.rgb; + +} + +#endif + + + +void main() { + +#ifdef RENDER_DEPTH_DUAL_PARABOLOID + + if (dp_clip>0.0) + discard; +#endif + + //lay out everything, whathever is unused is optimized away anyway + highp vec3 vertex = vertex_interp; + vec3 albedo = vec3(0.8,0.8,0.8); + vec3 transmission = vec3(0.0); + float metallic = 0.0; + float specular = 0.5; + vec3 emission = vec3(0.0,0.0,0.0); + float roughness = 1.0; + float rim = 0.0; + float rim_tint = 0.0; + float clearcoat=0.0; + float clearcoat_gloss=0.0; + float anisotropy = 1.0; + vec2 anisotropy_flow = vec2(1.0,0.0); + +#if defined(ENABLE_AO) + float ao=1.0; + float ao_light_affect=0.0; +#endif + + float alpha = 1.0; + +#ifdef METERIAL_DOUBLESIDED + float side=float(gl_FrontFacing)*2.0-1.0; +#else + float side=1.0; +#endif + + +#if defined(ALPHA_SCISSOR_USED) + float alpha_scissor = 0.5; +#endif + +#if defined(ENABLE_TANGENT_INTERP) || defined(ENABLE_NORMALMAP) || defined(LIGHT_USE_ANISOTROPY) + vec3 binormal = normalize(binormal_interp)*side; + vec3 tangent = normalize(tangent_interp)*side; +#else + vec3 binormal = vec3(0.0); + vec3 tangent = vec3(0.0); +#endif + vec3 normal = normalize(normal_interp)*side; + +#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(SCREEN_UV_USED) + vec2 screen_uv = gl_FragCoord.xy*screen_pixel_size; +#endif + +#if defined (ENABLE_SSS) + float sss_strength=0.0; +#endif + +{ + + +FRAGMENT_SHADER_CODE + +} + + +#if defined(ALPHA_SCISSOR_USED) + if (alpha<alpha_scissor) { + discard; + } +#endif + +#ifdef USE_OPAQUE_PREPASS + + if (alpha<0.99) { + discard; + } +#endif + +#if defined(ENABLE_NORMALMAP) + + normalmap.xy=normalmap.xy*2.0-1.0; + normalmap.z=sqrt(1.0-dot(normalmap.xy,normalmap.xy)); //always ignore Z, as it can be RG packed, Z may be pos/neg, etc. + + normal = normalize( mix(normal_interp,tangent * normalmap.x + binormal * normalmap.y + normal * normalmap.z,normaldepth) ) * side; + +#endif + +#if defined(LIGHT_USE_ANISOTROPY) + + 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 + +/////////////////////// LIGHTING ////////////////////////////// + + //apply energy conservation + +#ifdef USE_VERTEX_LIGHTING + + vec3 specular_light = specular_light_interp.rgb; + vec3 diffuse_light = diffuse_light_interp.rgb; +#else + + vec3 specular_light = vec3(0.0,0.0,0.0); + vec3 diffuse_light = vec3(0.0,0.0,0.0); + +#endif + + vec3 ambient_light; + vec3 env_reflection_light = vec3(0.0,0.0,0.0); + + vec3 eye_vec = -normalize( vertex_interp ); + + + +#ifdef USE_RADIANCE_MAP + + if (no_ambient_light) { + ambient_light=vec3(0.0,0.0,0.0); + } else { + { + + { //read radiance from dual paraboloid + + vec3 ref_vec = reflect(-eye_vec,normal); //2.0 * ndotv * normal - view; // reflect(v, n); + ref_vec=normalize((radiance_inverse_xform * vec4(ref_vec,0.0)).xyz); + vec3 radiance = textureDualParaboloid(radiance_map,ref_vec,roughness) * bg_energy; + env_reflection_light = radiance; + + } + //no longer a cubemap + //vec3 radiance = textureLod(radiance_cube, r, lod).xyz * ( brdf.x + brdf.y); + + } + + { + + vec3 ambient_dir=normalize((radiance_inverse_xform * vec4(normal,0.0)).xyz); + vec3 env_ambient=textureDualParaboloid(radiance_map,ambient_dir,1.0) * bg_energy; + + ambient_light=mix(ambient_light_color.rgb,env_ambient,radiance_ambient_contribution); + //ambient_light=vec3(0.0,0.0,0.0); + } + } + +#else + + if (no_ambient_light){ + ambient_light=vec3(0.0,0.0,0.0); + } else { + ambient_light=ambient_light_color.rgb; + } +#endif + + ambient_light*=ambient_energy; + + float specular_blob_intensity=1.0; +#if defined(SPECULAR_TOON) + specular_blob_intensity*=specular * 2.0; +#endif + +#if defined(USE_LIGHT_DIRECTIONAL) + + vec3 light_attenuation=vec3(1.0); + + float depth_z = -vertex.z; +#ifdef LIGHT_DIRECTIONAL_SHADOW + +#ifdef LIGHT_USE_PSSM4 + if (depth_z < shadow_split_offsets.w) { +#elif defined(LIGHT_USE_PSSM2) + if (depth_z < shadow_split_offsets.y) { +#else + if (depth_z < shadow_split_offsets.x) { +#endif //LIGHT_USE_PSSM4 + + vec3 pssm_coord; + float pssm_fade=0.0; + +#ifdef LIGHT_USE_PSSM_BLEND + float pssm_blend; + vec3 pssm_coord2; + bool use_blend=true; +#endif + + +#ifdef LIGHT_USE_PSSM4 + + + if (depth_z < shadow_split_offsets.y) { + + if (depth_z < shadow_split_offsets.x) { + + highp vec4 splane=(shadow_matrix1 * vec4(vertex,1.0)); + pssm_coord=splane.xyz/splane.w; + + +#if defined(LIGHT_USE_PSSM_BLEND) + + splane=(shadow_matrix2 * vec4(vertex,1.0)); + pssm_coord2=splane.xyz/splane.w; + pssm_blend=smoothstep(0.0,shadow_split_offsets.x,depth_z); +#endif + + } else { + + highp vec4 splane=(shadow_matrix2 * vec4(vertex,1.0)); + pssm_coord=splane.xyz/splane.w; + +#if defined(LIGHT_USE_PSSM_BLEND) + splane=(shadow_matrix3 * vec4(vertex,1.0)); + pssm_coord2=splane.xyz/splane.w; + pssm_blend=smoothstep(shadow_split_offsets.x,shadow_split_offsets.y,depth_z); +#endif + + } + } else { + + + if (depth_z < shadow_split_offsets.z) { + + highp vec4 splane=(shadow_matrix3 * vec4(vertex,1.0)); + pssm_coord=splane.xyz/splane.w; + +#if defined(LIGHT_USE_PSSM_BLEND) + splane=(shadow_matrix4 * vec4(vertex,1.0)); + pssm_coord2=splane.xyz/splane.w; + pssm_blend=smoothstep(shadow_split_offsets.y,shadow_split_offsets.z,depth_z); +#endif + + } else { + + highp vec4 splane=(shadow_matrix4 * vec4(vertex,1.0)); + pssm_coord=splane.xyz/splane.w; + pssm_fade = smoothstep(shadow_split_offsets.z,shadow_split_offsets.w,depth_z); + +#if defined(LIGHT_USE_PSSM_BLEND) + use_blend=false; + +#endif + + } + } + + + +#endif //LIGHT_USE_PSSM4 + +#ifdef LIGHT_USE_PSSM2 + + if (depth_z < shadow_split_offsets.x) { + + highp vec4 splane=(shadow_matrix1 * vec4(vertex,1.0)); + pssm_coord=splane.xyz/splane.w; + + +#if defined(LIGHT_USE_PSSM_BLEND) + + splane=(shadow_matrix2 * vec4(vertex,1.0)); + pssm_coord2=splane.xyz/splane.w; + pssm_blend=smoothstep(0.0,shadow_split_offsets.x,depth_z); +#endif + + } else { + highp vec4 splane=(shadow_matrix2 * vec4(vertex,1.0)); + pssm_coord=splane.xyz/splane.w; + pssm_fade = smoothstep(shadow_split_offsets.x,shadow_split_offsets.y,depth_z); +#if defined(LIGHT_USE_PSSM_BLEND) + use_blend=false; + +#endif + + } + +#endif //LIGHT_USE_PSSM2 + +#if !defined(LIGHT_USE_PSSM4) && !defined(LIGHT_USE_PSSM2) + { //regular orthogonal + highp vec4 splane=(shadow_matrix1 * vec4(vertex,1.0)); + pssm_coord=splane.xyz/splane.w; + } +#endif + + + //one one sample + + float shadow = sample_shadow(directional_shadow,directional_shadow_pixel_size,pssm_coord.xy,pssm_coord.z,light_clamp); + +#if defined(LIGHT_USE_PSSM_BLEND) + + if (use_blend) { + shadow=mix(shadow, sample_shadow(directional_shadow,directional_shadow_pixel_size,pssm_coord2.xy,pssm_coord2.z,light_clamp),pssm_blend); + } +#endif + +#ifdef USE_CONTACT_SHADOWS + if (shadow>0.01 && shadow_color_contact.a>0.0) { + + float contact_shadow = contact_shadow_compute(vertex,-light_direction_attenuation.xyz,shadow_color_contact.a); + shadow=min(shadow,contact_shadow); + + } +#endif + light_attenuation=mix(mix(shadow_color_contact.rgb,vec3(1.0),shadow),vec3(1.0),pssm_fade); + + + } + + +#endif //LIGHT_DIRECTIONAL_SHADOW + +#ifdef USE_VERTEX_LIGHTING + diffuse_light*=mix(vec3(1.0),light_attenuation,diffuse_light_interp.a); + specular_light*=mix(vec3(1.0),light_attenuation,specular_light_interp.a); + +#else + light_compute(normal,-light_direction_attenuation.xyz,eye_vec,binormal,tangent,light_color_energy.rgb,light_attenuation,albedo,transmission,light_params.z*specular_blob_intensity,roughness,metallic,rim,rim_tint,clearcoat,clearcoat_gloss,anisotropy,diffuse_light,specular_light); +#endif + + +#endif //#USE_LIGHT_DIRECTIONAL + +#ifdef USE_GI_PROBES + gi_probes_compute(vertex,normal,roughness,env_reflection_light,ambient_light); + +#endif + +#ifdef USE_FORWARD_LIGHTING + + + highp vec4 reflection_accum = vec4(0.0,0.0,0.0,0.0); + highp vec4 ambient_accum = vec4(0.0,0.0,0.0,0.0); + for(int i=0;i<reflection_count;i++) { + reflection_process(reflection_indices[i],vertex,normal,binormal,tangent,roughness,anisotropy,ambient_light,env_reflection_light,reflection_accum,ambient_accum); + } + + if (reflection_accum.a>0.0) { + specular_light+=reflection_accum.rgb/reflection_accum.a; + } else { + specular_light+=env_reflection_light; + } + + if (ambient_accum.a>0.0) { + ambient_light+=ambient_accum.rgb/ambient_accum.a; + } + + + +#ifdef USE_VERTEX_LIGHTING + + diffuse_light*=albedo; +#else + + for(int i=0;i<omni_light_count;i++) { + light_process_omni(omni_light_indices[i],vertex,eye_vec,normal,binormal,tangent,albedo,transmission,roughness,metallic,rim,rim_tint,clearcoat,clearcoat_gloss,anisotropy,specular_blob_intensity,diffuse_light,specular_light); + } + + for(int i=0;i<spot_light_count;i++) { + light_process_spot(spot_light_indices[i],vertex,eye_vec,normal,binormal,tangent,albedo,transmission,roughness,metallic,rim,rim_tint,clearcoat,clearcoat_gloss,anisotropy,specular_blob_intensity,diffuse_light,specular_light); + } + +#endif //USE_VERTEX_LIGHTING + +#endif + + + + +#ifdef RENDER_DEPTH +//nothing happens, so a tree-ssa optimizer will result in no fragment shader :) +#else + + specular_light*=reflection_multiplier; + ambient_light*=albedo; //ambient must be multiplied by albedo at the end + +#if defined(ENABLE_AO) + ambient_light*=ao; + ao_light_affect = mix(1.0,ao,ao_light_affect); + specular_light*=ao_light_affect; + diffuse_light*=ao_light_affect; +#endif + + + + //energy conservation + diffuse_light *= 1.0-metallic; // TODO: avoid all diffuse and ambient light calculations when metallic == 1 up to this point + ambient_light *= 1.0-metallic; + + + { + +#if defined(DIFFUSE_TOON) + //simplify for toon, as + specular_light *= specular * metallic * albedo * 2.0; +#else + // 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,eye_vec),0.0,1.0); + float a004 = min( r.x * r.x, exp2( -9.28 * ndotv ) ) * r.x + r.y; + vec2 AB = vec2( -1.04, 1.04 ) * a004 + r.zw; + + vec3 specular_color = metallic_to_specular_color(metallic, specular, albedo); + specular_light *= AB.x * specular_color + AB.y; +#endif + + } + + if (fog_color_enabled.a > 0.5) { + + float fog_amount=0.0; + + + +#ifdef USE_LIGHT_DIRECTIONAL + + vec3 fog_color = mix( fog_color_enabled.rgb, fog_sun_color_amount.rgb,fog_sun_color_amount.a * pow(max( dot(normalize(vertex),-light_direction_attenuation.xyz), 0.0),8.0) ); +#else + + vec3 fog_color = fog_color_enabled.rgb; +#endif + + //apply fog + + if (fog_depth_enabled) { + + float fog_z = smoothstep(fog_depth_begin,z_far,length(vertex)); + + fog_amount = pow(fog_z,fog_depth_curve); + if (fog_transmit_enabled) { + vec3 total_light = emission + ambient_light + specular_light + diffuse_light; + float transmit = pow(fog_z,fog_transmit_curve); + fog_color = mix(max(total_light,fog_color),fog_color,transmit); + } + } + + if (fog_height_enabled) { + float y = (camera_matrix * vec4(vertex,1.0)).y; + fog_amount = max(fog_amount,pow(smoothstep(fog_height_min,fog_height_max,y),fog_height_curve)); + } + + float rev_amount = 1.0 - fog_amount; + + + emission = emission * rev_amount + fog_color * fog_amount; + ambient_light*=rev_amount; + specular_light*rev_amount; + diffuse_light*=rev_amount; + + } + +#ifdef USE_MULTIPLE_RENDER_TARGETS + + +#ifdef SHADELESS + diffuse_buffer=vec4(albedo.rgb,0.0); + specular_buffer=vec4(0.0); + +#else + +#if defined(ENABLE_AO) + + float ambient_scale=0.0; // AO is supplied by material +#else + //approximate ambient scale for SSAO, since we will lack full ambient + float max_emission=max(emission.r,max(emission.g,emission.b)); + float max_ambient=max(ambient_light.r,max(ambient_light.g,ambient_light.b)); + float max_diffuse=max(diffuse_light.r,max(diffuse_light.g,diffuse_light.b)); + float total_ambient = max_ambient+max_diffuse+max_emission; + float ambient_scale = (total_ambient>0.0) ? (max_ambient+ambient_occlusion_affect_light*max_diffuse)/total_ambient : 0.0; +#endif //ENABLE_AO + + diffuse_buffer=vec4(emission+diffuse_light+ambient_light,ambient_scale); + specular_buffer=vec4(specular_light,metallic); + +#endif //SHADELESS + + normal_mr_buffer=vec4(normalize(normal)*0.5+0.5,roughness); + +#if defined (ENABLE_SSS) + sss_buffer = sss_strength; +#endif + + +#else //USE_MULTIPLE_RENDER_TARGETS + + +#ifdef SHADELESS + frag_color=vec4(albedo,alpha); +#else + frag_color=vec4(emission+ambient_light+diffuse_light+specular_light,alpha); +#endif //SHADELESS + + +#endif //USE_MULTIPLE_RENDER_TARGETS + + + +#endif //RENDER_DEPTH + + +} |