diff options
Diffstat (limited to 'indra/newview/app_settings/shaders/class2/deferred/softenLightF.glsl')
| -rw-r--r-- | indra/newview/app_settings/shaders/class2/deferred/softenLightF.glsl | 274 |
1 files changed, 224 insertions, 50 deletions
diff --git a/indra/newview/app_settings/shaders/class2/deferred/softenLightF.glsl b/indra/newview/app_settings/shaders/class2/deferred/softenLightF.glsl index 5bb64e18a7..3a1287e910 100644 --- a/indra/newview/app_settings/shaders/class2/deferred/softenLightF.glsl +++ b/indra/newview/app_settings/shaders/class2/deferred/softenLightF.glsl @@ -26,9 +26,10 @@ #extension GL_ARB_texture_rectangle : enable #extension GL_ARB_shader_texture_lod : enable -/*[EXTRA_CODE_HERE]*/ +#define FLT_MAX 3.402823466e+38 -#define REFMAP_COUNT 8 +#define REFMAP_COUNT 256 +#define REF_SAMPLE_COUNT 64 //maximum number of samples to consider #ifdef DEFINE_GL_FRAGCOLOR out vec4 frag_color; @@ -42,12 +43,26 @@ uniform sampler2DRect normalMap; uniform sampler2DRect lightMap; uniform sampler2DRect depthMap; uniform samplerCube environmentMap; -uniform samplerCube reflectionMap[REFMAP_COUNT]; +uniform samplerCubeArray reflectionProbes; uniform sampler2D lightFunc; -uniform int refmapCount; - -uniform vec3 refOrigin[REFMAP_COUNT]; +layout (std140, binding = 1) uniform ReflectionProbes +{ + // list of sphere based reflection probes sorted by distance to camera (closest first) + vec4 refSphere[REFMAP_COUNT]; + // index of cube map in reflectionProbes for a corresponding reflection probe + // e.g. cube map channel of refSphere[2] is stored in refIndex[2] + // refIndex.x - cubemap channel in reflectionProbes + // refIndex.y - index in refNeighbor of neighbor list (index is ivec4 index, not int index) + // refIndex.z - number of neighbors + ivec4 refIndex[REFMAP_COUNT]; + + // neighbor list data (refSphere indices, not cubemap array layer) + ivec4 refNeighbor[1024]; + + // number of reflection probes present in refSphere + int refmapCount; +}; uniform float blur_size; uniform float blur_fidelity; @@ -80,7 +95,116 @@ vec3 srgb_to_linear(vec3 c); vec4 applyWaterFogView(vec3 pos, vec4 color); #endif +// list of probeIndexes shader will actually use after "getRefIndex" is called +// (stores refIndex/refSphere indices, NOT rerflectionProbes layer) +int probeIndex[REF_SAMPLE_COUNT]; + +// number of probes stored in probeIndex +int probeInfluences = 0; + + +// return true if probe at index i influences position pos +bool shouldSampleProbe(int i, vec3 pos) +{ + vec3 delta = pos.xyz - refSphere[i].xyz; + float d = dot(delta, delta); + float r2 = refSphere[i].w; + r2 *= r2; + return d < r2; +} + +// populate "probeIndex" with N probe indices that influence pos where N is REF_SAMPLE_COUNT +// overall algorithm -- +void getRefIndex(vec3 pos) +{ + // TODO: make some sort of structure that reduces the number of distance checks + for (int i = 0; i < refmapCount; ++i) + { + // found an influencing probe + if (shouldSampleProbe(i, pos)) + { + probeIndex[probeInfluences] = i; + ++probeInfluences; + + int neighborIdx = refIndex[i].y; + if (neighborIdx != -1) + { + int neighborCount = min(refIndex[i].z, REF_SAMPLE_COUNT-1); + + int count = 0; + while (count < neighborCount) + { + // check up to REF_SAMPLE_COUNT-1 neighbors (neighborIdx is ivec4 index) + + int idx = refNeighbor[neighborIdx].x; + if (shouldSampleProbe(idx, pos)) + { + probeIndex[probeInfluences++] = idx; + if (probeInfluences == REF_SAMPLE_COUNT) + { + return; + } + } + count++; + if (count == neighborCount) + { + return; + } + + idx = refNeighbor[neighborIdx].y; + if (shouldSampleProbe(idx, pos)) + { + probeIndex[probeInfluences++] = idx; + if (probeInfluences == REF_SAMPLE_COUNT) + { + return; + } + } + count++; + if (count == neighborCount) + { + return; + } + + idx = refNeighbor[neighborIdx].z; + if (shouldSampleProbe(idx, pos)) + { + probeIndex[probeInfluences++] = idx; + if (probeInfluences == REF_SAMPLE_COUNT) + { + return; + } + } + count++; + if (count == neighborCount) + { + return; + } + + idx = refNeighbor[neighborIdx].w; + if (shouldSampleProbe(idx, pos)) + { + probeIndex[probeInfluences++] = idx; + if (probeInfluences == REF_SAMPLE_COUNT) + { + return; + } + } + count++; + if (count == neighborCount) + { + return; + } + + ++neighborIdx; + } + + return; + } + } + } +} // from https://www.scratchapixel.com/lessons/3d-basic-rendering/minimal-ray-tracer-rendering-simple-shapes/ray-sphere-intersection @@ -120,13 +244,10 @@ bool intersect(const Ray &ray) const } */ // adapted -- assume that origin is inside sphere, return distance from origin to edge of sphere -float sphereIntersect(vec3 origin, vec3 dir, vec4 sph ) +float sphereIntersect(vec3 origin, vec3 dir, vec3 center, float radius2) { float t0, t1; // solutions for t if the ray intersects - vec3 center = sph.xyz; - float radius2 = sph.w * sph.w; - vec3 L = center - origin; float tca = dot(L,dir); @@ -139,33 +260,78 @@ float sphereIntersect(vec3 origin, vec3 dir, vec4 sph ) return t1; } +// Tap a sphere based reflection probe +// pos - position of pixel +// dir - pixel normal +// lod - which mip to bias towards (lower is higher res, sharper reflections) +// c - center of probe +// r2 - radius of probe squared +// i - index of probe +// vi - point at which reflection vector struck the influence volume, in clip space +vec3 tapRefMap(vec3 pos, vec3 dir, float lod, vec3 c, float r2, int i, out vec3 vi) +{ + //lod = max(lod, 1); +// parallax adjustment + float d = sphereIntersect(pos, dir, c, r2); + + { + vec3 v = pos + dir * d; + vi = v; + v -= c.xyz; + v = env_mat * v; + + float min_lod = textureQueryLod(reflectionProbes,v).y; // lower is higher res + return textureLod(reflectionProbes, vec4(v.xyz, refIndex[i].x), max(min_lod, lod)).rgb; + //return texture(reflectionProbes, vec4(v.xyz, refIndex[i].x)).rgb; + } +} + vec3 sampleRefMap(vec3 pos, vec3 dir, float lod) { float wsum = 0.0; - vec3 col = vec3(0,0,0); + float vd2 = dot(pos,pos); // view distance squared - for (int i = 0; i < refmapCount; ++i) - //int i = 0; + for (int idx = 0; idx < probeInfluences; ++idx) { - float r = 16.0; - vec3 delta = pos.xyz-refOrigin[i].xyz; - if (length(delta) < r) + int i = probeIndex[idx]; + float r = refSphere[i].w; // radius of sphere volume + float rr = r*r; // radius squred + float r1 = r * 0.1; // 75% of radius (outer sphere to start interpolating down) + vec3 delta = pos.xyz-refSphere[i].xyz; + float d2 = dot(delta,delta); + float r2 = r1*r1; + { - float w = 1.0/max(dot(delta, delta), r); - w *= w; - w *= w; + vec3 vi; + vec3 refcol = tapRefMap(pos, dir, lod, refSphere[i].xyz, rr, i, vi); + + float w = 1.0/d2; - // parallax adjustment - float d = sphereIntersect(pos, dir, vec4(refOrigin[i].xyz, r)); + float atten = 1.0-max(d2-r2, 0.0)/(rr-r2); + w *= atten; - { - vec3 v = pos + dir * d; - v -= refOrigin[i].xyz; - v = env_mat * v; + col += refcol*w; + + wsum += w; + } + } - float min_lod = textureQueryLod(reflectionMap[i],v).y; // lower is higher res - col += textureLod(reflectionMap[i], v, max(min_lod, lod)).rgb*w; + if (probeInfluences <= 1) + { //edge-of-scene probe or no probe influence, mix in with embiggened version of probes closest to camera + for (int idx = 0; idx < 8; ++idx) + { + int i = idx; + vec3 delta = pos.xyz-refSphere[i].xyz; + float d2 = dot(delta,delta); + + { + vec3 vi; + vec3 refcol = tapRefMap(pos, dir, lod, refSphere[i].xyz, d2, i, vi); + + float w = 1.0/d2; + w *= w; + col += refcol*w; wsum += w; } } @@ -175,13 +341,6 @@ vec3 sampleRefMap(vec3 pos, vec3 dir, float lod) { col *= 1.0/wsum; } - else - { - // this pixel not covered by a probe, fallback to "full scene" environment map - vec3 v = env_mat * dir; - float min_lod = textureQueryLod(environmentMap, v).y; // lower is higher res - col = textureLod(environmentMap, v, max(min_lod, lod)).rgb; - } return col; } @@ -202,13 +361,26 @@ vec3 sampleAmbient(vec3 pos, vec3 dir, float lod) col *= 0.333333; - return col*0.6; // fudge darker + return col*0.8; // fudge darker } +// brighten a color so that at least one component is 1 +vec3 brighten(vec3 c) +{ + float m = max(max(c.r, c.g), c.b); + + if (m == 0) + { + return vec3(1,1,1); + } + + return c * 1.0/m; +} + void main() { - float reflection_lods = 11; // TODO -- base this on resolution of reflection map instead of hard coding + float reflection_lods = 8; // TODO -- base this on resolution of reflection map instead of hard coding vec2 tc = vary_fragcoord.xy; float depth = texture2DRect(depthMap, tc.xy).r; @@ -238,14 +410,16 @@ void main() vec3 amblit; vec3 additive; vec3 atten; + + getRefIndex(pos.xyz); + calcAtmosphericVars(pos.xyz, light_dir, ambocc, sunlit, amblit, additive, atten, true); //vec3 amb_vec = env_mat * norm.xyz; - vec3 ambenv = sampleAmbient(pos.xyz, norm.xyz, reflection_lods-1); - amblit = mix(ambenv, amblit, amblit); - color.rgb = amblit; - + vec3 ambenv = sampleAmbient(pos.xyz, norm.xyz, reflection_lods); + amblit = max(ambenv, amblit); + color.rgb = amblit*ambocc; //float ambient = min(abs(dot(norm.xyz, sun_dir.xyz)), 1.0); //ambient *= 0.5; @@ -255,6 +429,7 @@ void main() vec3 sun_contrib = min(da, scol) * sunlit; color.rgb += sun_contrib; + color.rgb = min(color.rgb, vec3(1,1,1)); color.rgb *= diffuse.rgb; vec3 refnormpersp = reflect(pos.xyz, norm.xyz); @@ -274,26 +449,23 @@ void main() float lod = (1.0-spec.a)*reflection_lods; vec3 reflected_color = sampleRefMap(pos.xyz, normalize(refnormpersp), lod); - reflected_color *= 0.5; // fudge darker, not sure where there's a multiply by two and it's late + reflected_color *= 0.35; // fudge darker float fresnel = 1.0+dot(normalize(pos.xyz), norm.xyz); - fresnel += spec.a; - fresnel *= fresnel; - //fresnel *= spec.a; + float minf = spec.a * 0.1; + fresnel = fresnel * (1.0-minf) + minf; reflected_color *= spec.rgb*min(fresnel, 1.0); - //reflected_color = srgb_to_linear(reflected_color); - vec3 mixer = clamp(color.rgb + vec3(1,1,1) - spec.rgb, vec3(0,0,0), vec3(1,1,1)); - color.rgb = mix(reflected_color, color, mixer); + color.rgb += reflected_color; } color.rgb = mix(color.rgb, diffuse.rgb, diffuse.a); if (envIntensity > 0.0) { // add environmentmap - vec3 reflected_color = sampleRefMap(pos.xyz, normalize(refnormpersp), 0.0); + vec3 reflected_color = sampleRefMap(pos.xyz, normalize(refnormpersp), 0.0)*0.5; //fudge darker float fresnel = 1.0+dot(normalize(pos.xyz), norm.xyz); fresnel *= fresnel; - fresnel = fresnel * 0.95 + 0.05; - reflected_color *= fresnel; + fresnel = min(fresnel+envIntensity, 1.0); + reflected_color *= (envIntensity*fresnel)*brighten(spec.rgb); color = mix(color.rgb, reflected_color, envIntensity); } @@ -311,5 +483,7 @@ void main() // convert to linear as fullscreen lights need to sum in linear colorspace // and will be gamma (re)corrected downstream... + //color = vec3(ambocc); + //color = ambenv; frag_color.rgb = srgb_to_linear(color.rgb); } |