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 | 357 |
1 files changed, 344 insertions, 13 deletions
diff --git a/indra/newview/app_settings/shaders/class2/deferred/softenLightF.glsl b/indra/newview/app_settings/shaders/class2/deferred/softenLightF.glsl index 7700d16007..3a1287e910 100644 --- a/indra/newview/app_settings/shaders/class2/deferred/softenLightF.glsl +++ b/indra/newview/app_settings/shaders/class2/deferred/softenLightF.glsl @@ -26,7 +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 256 +#define REF_SAMPLE_COUNT 64 //maximum number of samples to consider #ifdef DEFINE_GL_FRAGCOLOR out vec4 frag_color; @@ -40,8 +43,27 @@ uniform sampler2DRect normalMap; uniform sampler2DRect lightMap; uniform sampler2DRect depthMap; uniform samplerCube environmentMap; +uniform samplerCubeArray reflectionProbes; uniform sampler2D lightFunc; +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; @@ -73,8 +95,293 @@ 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 + +// original reference implementation: +/* +bool intersect(const Ray &ray) const +{ + float t0, t1; // solutions for t if the ray intersects +#if 0 + // geometric solution + Vec3f L = center - orig; + float tca = L.dotProduct(dir); + // if (tca < 0) return false; + float d2 = L.dotProduct(L) - tca * tca; + if (d2 > radius2) return false; + float thc = sqrt(radius2 - d2); + t0 = tca - thc; + t1 = tca + thc; +#else + // analytic solution + Vec3f L = orig - center; + float a = dir.dotProduct(dir); + float b = 2 * dir.dotProduct(L); + float c = L.dotProduct(L) - radius2; + if (!solveQuadratic(a, b, c, t0, t1)) return false; +#endif + if (t0 > t1) std::swap(t0, t1); + + if (t0 < 0) { + t0 = t1; // if t0 is negative, let's use t1 instead + if (t0 < 0) return false; // both t0 and t1 are negative + } + + t = t0; + + return true; +} */ + +// adapted -- assume that origin is inside sphere, return distance from origin to edge of sphere +float sphereIntersect(vec3 origin, vec3 dir, vec3 center, float radius2) +{ + float t0, t1; // solutions for t if the ray intersects + + vec3 L = center - origin; + float tca = dot(L,dir); + + float d2 = dot(L,L) - tca * tca; + + float thc = sqrt(radius2 - d2); + t0 = tca - thc; + t1 = tca + thc; + + 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 idx = 0; idx < probeInfluences; ++idx) + { + 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; + + { + vec3 vi; + vec3 refcol = tapRefMap(pos, dir, lod, refSphere[i].xyz, rr, i, vi); + + float w = 1.0/d2; + + float atten = 1.0-max(d2-r2, 0.0)/(rr-r2); + w *= atten; + + col += refcol*w; + + wsum += 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; + } + } + } + + if (wsum > 0.0) + { + col *= 1.0/wsum; + } + + return col; +} + +vec3 sampleAmbient(vec3 pos, vec3 dir, float lod) +{ + vec3 col = sampleRefMap(pos, dir, lod); + + //desaturate + vec3 hcol = col *0.5; + + col *= 2.0; + col = vec3( + col.r + hcol.g + hcol.b, + col.g + hcol.r + hcol.b, + col.b + hcol.r + hcol.g + ); + + col *= 0.333333; + + 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 = 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; vec4 pos = getPositionWithDepth(tc, depth); @@ -103,40 +410,63 @@ void main() vec3 amblit; vec3 additive; vec3 atten; + + getRefIndex(pos.xyz); + calcAtmosphericVars(pos.xyz, light_dir, ambocc, sunlit, amblit, additive, atten, true); - color.rgb = amblit; + //vec3 amb_vec = env_mat * norm.xyz; - float ambient = min(abs(dot(norm.xyz, sun_dir.xyz)), 1.0); - ambient *= 0.5; - ambient *= ambient; - ambient = (1.0 - ambient); - color.rgb *= ambient; + 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; + //ambient *= ambient; + //ambient = (1.0 - ambient); + //color.rgb *= ambient; 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 = normalize(reflect(pos.xyz, norm.xyz)); + vec3 refnormpersp = reflect(pos.xyz, norm.xyz); + vec3 env_vec = env_mat * refnormpersp; if (spec.a > 0.0) // specular reflection { - float sa = dot(refnormpersp, light_dir.xyz); + float sa = dot(normalize(refnormpersp), light_dir.xyz); vec3 dumbshiny = sunlit * scol * (texture2D(lightFunc, vec2(sa, spec.a)).r); // add the two types of shiny together vec3 spec_contrib = dumbshiny * spec.rgb; bloom = dot(spec_contrib, spec_contrib) / 6; color.rgb += spec_contrib; + + // add reflection map - EXPERIMENTAL WORK IN PROGRESS + + float lod = (1.0-spec.a)*reflection_lods; + vec3 reflected_color = sampleRefMap(pos.xyz, normalize(refnormpersp), lod); + reflected_color *= 0.35; // fudge darker + float fresnel = 1.0+dot(normalize(pos.xyz), norm.xyz); + float minf = spec.a * 0.1; + fresnel = fresnel * (1.0-minf) + minf; + reflected_color *= spec.rgb*min(fresnel, 1.0); + color.rgb += reflected_color; } color.rgb = mix(color.rgb, diffuse.rgb, diffuse.a); if (envIntensity > 0.0) { // add environmentmap - vec3 env_vec = env_mat * refnormpersp; - vec3 reflected_color = textureCube(environmentMap, env_vec).rgb; - color = mix(color.rgb, reflected_color, envIntensity); + 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 = min(fresnel+envIntensity, 1.0); + reflected_color *= (envIntensity*fresnel)*brighten(spec.rgb); + color = mix(color.rgb, reflected_color, envIntensity); } if (norm.w < 0.5) @@ -153,6 +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); - frag_color.a = bloom; } |