181 lines
6.7 KiB
GLSL
181 lines
6.7 KiB
GLSL
#version 450
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#pragma shader_stage(compute)
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#extension GL_EXT_samplerless_texture_functions : require
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#extension GL_EXT_nonuniform_qualifier : enable
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layout (local_size_x = 8, local_size_y = 8, local_size_z = 8) in;
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#define MULTISAMPLING 1
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#define DEFERRED_SAMPLING 0
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#define LAMBERT 1
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#define PBR 0
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#define VXGI 1
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#define COMPUTE 1
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layout (constant_id = 0) const uint TEXTURES = 512;
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layout (constant_id = 1) const uint CUBEMAPS = 128;
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layout (constant_id = 2) const uint CASCADES = 16;
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#include "../common/macros.h"
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#include "../common/structs.h"
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layout (binding = 4) uniform UBO {
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Matrices matrices;
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Mode mode;
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Fog fog;
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uint lights;
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uint materials;
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uint textures;
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uint drawCalls;
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vec3 ambient;
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float gamma;
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float exposure;
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uint msaa;
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uint shadowSamples;
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float cascadePower;
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uint indexSkybox;
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uint vxgiShadowSamples;
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float pointLightEyeDepthScale;
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uint padding2;
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} ubo;
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layout (std140, binding = 5) readonly buffer Lights {
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Light lights[];
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};
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layout (std140, binding = 6) readonly buffer Materials {
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Material materials[];
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};
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layout (std140, binding = 7) readonly buffer Textures {
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Texture textures[];
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};
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layout (std140, binding = 8) readonly buffer DrawCalls {
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DrawCall drawCalls[];
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};
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layout (binding = 9) uniform sampler2D samplerTextures[TEXTURES];
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layout (binding = 10) uniform samplerCube samplerCubemaps[CUBEMAPS];
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layout (binding = 11) uniform sampler3D samplerNoise;
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layout (binding = 12, rg16ui) uniform volatile coherent uimage3D voxelId[CASCADES];
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layout (binding = 13, rg16f) uniform volatile coherent image3D voxelUv[CASCADES];
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layout (binding = 14, rg16f) uniform volatile coherent image3D voxelNormal[CASCADES];
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#if VXGI_HDR
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layout (binding = 15, rgba8) uniform volatile coherent image3D voxelRadiance[CASCADES];
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#else
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layout (binding = 15, rgba16f) uniform volatile coherent image3D voxelRadiance[CASCADES];
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#endif
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#include "../common/functions.h"
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#undef VXGI
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#include "../common/shadows.h"
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void main() {
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const vec3 tUvw = gl_GlobalInvocationID.xzy;
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for ( uint CASCADE = 0; CASCADE < CASCADES; ++CASCADE ) {
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surface.normal.world = decodeNormals( vec2(imageLoad(voxelNormal[CASCADE], ivec3(tUvw) ).xy) );
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surface.normal.eye = vec3( ubo.matrices.vxgi * vec4( surface.normal.world, 0.0f ) );
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surface.position.eye = (vec3(gl_GlobalInvocationID.xyz) / vec3(imageSize(voxelRadiance[CASCADE])) * 2.0f - 1.0f) * cascadePower(CASCADE);
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surface.position.world = vec3( inverse(ubo.matrices.vxgi) * vec4( surface.position.eye, 1.0f ) );
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const uvec2 ID = uvec2(imageLoad(voxelId[CASCADE], ivec3(tUvw) ).xy);
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if ( ID.x == 0 || ID.y == 0 ) {
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imageStore(voxelRadiance[CASCADE], ivec3(tUvw), vec4(0));
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continue;
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}
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const uint drawId = ID.x - 1;
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const DrawCall drawCall = drawCalls[drawId];
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surface.material.id = ID.y + drawCall.materialIndex - 1;
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const Material material = materials[surface.material.id];
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surface.material.albedo = material.colorBase;
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surface.fragment = material.colorEmissive;
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#if DEFERRED_SAMPLING
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surface.uv = imageLoad(voxelUv[CASCADE], ivec3(tUvw) ).xy;
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const bool useAtlas = validTextureIndex( drawCall.textureIndex + material.indexAtlas );
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Texture textureAtlas;
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if ( useAtlas ) textureAtlas = textures[drawCall.textureIndex + material.indexAtlas];
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if ( validTextureIndex( drawCall.textureIndex + material.indexAlbedo ) ) {
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const Texture t = textures[drawCall.textureIndex + material.indexAlbedo];
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surface.material.albedo = texture( samplerTextures[nonuniformEXT((useAtlas)?textureAtlas.index:t.index)], ( useAtlas ) ? mix( t.lerp.xy, t.lerp.zw, surface.uv ) : surface.uv );
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}
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// OPAQUE
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if ( material.modeAlpha == 0 ) {
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surface.material.albedo.a = 1;
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// BLEND
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} else if ( material.modeAlpha == 1 ) {
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// MASK
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} else if ( material.modeAlpha == 2 ) {
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}
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// Emissive textures
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if ( validTextureIndex( drawCall.textureIndex + material.indexEmissive ) ) {
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const Texture t = textures[drawCall.textureIndex + material.indexEmissive];
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surface.fragment += texture( samplerTextures[nonuniformEXT((useAtlas)?textureAtlas.index:t.index)], ( useAtlas ) ? mix( t.lerp.xy, t.lerp.zw, surface.uv ) : surface.uv );
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}
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#else
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surface.material.albedo = imageLoad(voxelRadiance[CASCADE], ivec3(tUvw) );
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#endif
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surface.material.metallic = material.factorMetallic;
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surface.material.roughness = material.factorRoughness;
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surface.material.occlusion = material.factorOcclusion;
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float litFactor = 1.0;
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if ( 0 <= material.indexLightmap ) {
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surface.fragment.rgb += surface.material.albedo.rgb + ubo.ambient.rgb * surface.material.occlusion;
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} else {
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surface.fragment.rgb += surface.material.albedo.rgb * ubo.ambient.rgb * surface.material.occlusion;
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}
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// corrections
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surface.material.roughness *= 4.0;
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{
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const vec3 F0 = mix(vec3(0.04), surface.material.albedo.rgb, surface.material.metallic);
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const vec3 Lo = normalize( surface.position.world );
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const float cosLo = max(0.0, dot(surface.normal.world, Lo));
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for ( uint i = 0; i < ubo.lights; ++i ) {
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const Light light = lights[i];
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if ( light.power <= LIGHT_POWER_CUTOFF ) continue;
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if ( light.type >= 0 && 0 <= material.indexLightmap ) continue;
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const vec3 Lp = light.position;
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const vec3 Liu = light.position - surface.position.world;
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const vec3 Li = normalize(Liu);
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const float Ls = shadowFactor( light, 0.0 );
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const float La = 1.0 / (PI * pow(length(Liu), 2.0));
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if ( light.power * La * Ls <= LIGHT_POWER_CUTOFF ) continue;
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const float cosLi = max(0.0, dot(surface.normal.world, Li));
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const vec3 Lr = light.color.rgb * light.power * La * Ls;
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#if LAMBERT
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const vec3 diffuse = surface.material.albedo.rgb;
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const vec3 specular = vec3(0);
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#elif PBR
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const vec3 Lh = normalize(Li + Lo);
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const float cosLh = max(0.0, dot(surface.normal.world, Lh));
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const vec3 F = fresnelSchlick( F0, max( 0.0, dot(Lh, Lo) ) );
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const float D = ndfGGX( cosLh, surface.material.roughness );
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const float G = gaSchlickGGX(cosLi, cosLo, surface.material.roughness);
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const vec3 diffuse = mix( vec3(1.0) - F, vec3(0.0), surface.material.metallic ) * surface.material.albedo.rgb;
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const vec3 specular = (F * D * G) / max(EPSILON, 4.0 * cosLi * cosLo);
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#endif
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// lightmapped, compute only specular
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if ( light.type >= 0 && 0 <= material.indexLightmap ) surface.fragment.rgb += (specular) * Lr * cosLi;
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// point light, compute only diffuse
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// else if ( abs(light.type) == 1 ) surface.fragment.rgb += (diffuse) * Lr * cosLi;
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else surface.fragment.rgb += (diffuse + specular) * Lr * cosLi;
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surface.fragment.a += light.power * La * Ls;
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}
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}
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imageStore(voxelRadiance[CASCADE], ivec3(tUvw), vec4(surface.fragment.rgb, 1));
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}
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} |