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-rw-r--r--indra/newview/app_settings/shaders/class1/interface/radianceGenF.glsl150
1 files changed, 76 insertions, 74 deletions
diff --git a/indra/newview/app_settings/shaders/class1/interface/radianceGenF.glsl b/indra/newview/app_settings/shaders/class1/interface/radianceGenF.glsl
index eb0f7297ad..c1ed1bfe6e 100644
--- a/indra/newview/app_settings/shaders/class1/interface/radianceGenF.glsl
+++ b/indra/newview/app_settings/shaders/class1/interface/radianceGenF.glsl
@@ -1,28 +1,28 @@
-/**
+/**
* @file radianceGenF.glsl
*
* $LicenseInfo:firstyear=2022&license=viewerlgpl$
* Second Life Viewer Source Code
* Copyright (C) 2022, Linden Research, Inc.
- *
+ *
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License only.
- *
+ *
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
- *
+ *
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- *
+ *
* Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
* $/LicenseInfo$
*/
-
+
/*[EXTRA_CODE_HERE]*/
@@ -36,8 +36,9 @@ in vec3 vary_dir;
//uniform float roughness;
uniform float mipLevel;
-uniform int u_width;
+uniform int u_width;
uniform float max_probe_lod;
+uniform float probe_strength;
// =============================================================================================================
@@ -73,95 +74,96 @@ const float PI = 3.1415926536;
// Based omn http://byteblacksmith.com/improvements-to-the-canonical-one-liner-glsl-rand-for-opengl-es-2-0/
float random(vec2 co)
{
- float a = 12.9898;
- float b = 78.233;
- float c = 43758.5453;
- float dt= dot(co.xy ,vec2(a,b));
- float sn= mod(dt,3.14);
- return fract(sin(sn) * c);
+ float a = 12.9898;
+ float b = 78.233;
+ float c = 43758.5453;
+ float dt= dot(co.xy ,vec2(a,b));
+ float sn= mod(dt,3.14);
+ return fract(sin(sn) * c);
}
-vec2 hammersley2d(uint i, uint N)
+vec2 hammersley2d(uint i, uint N)
{
- // Radical inverse based on http://holger.dammertz.org/stuff/notes_HammersleyOnHemisphere.html
- uint bits = (i << 16u) | (i >> 16u);
- bits = ((bits & 0x55555555u) << 1u) | ((bits & 0xAAAAAAAAu) >> 1u);
- bits = ((bits & 0x33333333u) << 2u) | ((bits & 0xCCCCCCCCu) >> 2u);
- bits = ((bits & 0x0F0F0F0Fu) << 4u) | ((bits & 0xF0F0F0F0u) >> 4u);
- bits = ((bits & 0x00FF00FFu) << 8u) | ((bits & 0xFF00FF00u) >> 8u);
- float rdi = float(bits) * 2.3283064365386963e-10;
- return vec2(float(i) /float(N), rdi);
+ // Radical inverse based on http://holger.dammertz.org/stuff/notes_HammersleyOnHemisphere.html
+ uint bits = (i << 16u) | (i >> 16u);
+ bits = ((bits & 0x55555555u) << 1u) | ((bits & 0xAAAAAAAAu) >> 1u);
+ bits = ((bits & 0x33333333u) << 2u) | ((bits & 0xCCCCCCCCu) >> 2u);
+ bits = ((bits & 0x0F0F0F0Fu) << 4u) | ((bits & 0xF0F0F0F0u) >> 4u);
+ bits = ((bits & 0x00FF00FFu) << 8u) | ((bits & 0xFF00FF00u) >> 8u);
+ float rdi = float(bits) * 2.3283064365386963e-10;
+ return vec2(float(i) /float(N), rdi);
}
// Based on http://blog.selfshadow.com/publications/s2013-shading-course/karis/s2013_pbs_epic_slides.pdf
-vec3 importanceSample_GGX(vec2 Xi, float roughness, vec3 normal)
+vec3 importanceSample_GGX(vec2 Xi, float roughness, vec3 normal)
{
- // Maps a 2D point to a hemisphere with spread based on roughness
- float alpha = roughness * roughness;
- float phi = 2.0 * PI * Xi.x + random(normal.xz) * 0.1;
- float cosTheta = sqrt((1.0 - Xi.y) / (1.0 + (alpha*alpha - 1.0) * Xi.y));
- float sinTheta = sqrt(1.0 - cosTheta * cosTheta);
- vec3 H = vec3(sinTheta * cos(phi), sinTheta * sin(phi), cosTheta);
-
- // Tangent space
- vec3 up = abs(normal.z) < 0.999 ? vec3(0.0, 0.0, 1.0) : vec3(1.0, 0.0, 0.0);
- vec3 tangentX = normalize(cross(up, normal));
- vec3 tangentY = normalize(cross(normal, tangentX));
-
- // Convert to world Space
- return normalize(tangentX * H.x + tangentY * H.y + normal * H.z);
+ // Maps a 2D point to a hemisphere with spread based on roughness
+ float alpha = roughness * roughness;
+ float phi = 2.0 * PI * Xi.x + random(normal.xz) * 0.1;
+ float cosTheta = sqrt((1.0 - Xi.y) / (1.0 + (alpha*alpha - 1.0) * Xi.y));
+ float sinTheta = sqrt(1.0 - cosTheta * cosTheta);
+ vec3 H = vec3(sinTheta * cos(phi), sinTheta * sin(phi), cosTheta);
+
+ // Tangent space
+ vec3 up = abs(normal.z) < 0.999 ? vec3(0.0, 0.0, 1.0) : vec3(1.0, 0.0, 0.0);
+ vec3 tangentX = normalize(cross(up, normal));
+ vec3 tangentY = normalize(cross(normal, tangentX));
+
+ // Convert to world Space
+ return normalize(tangentX * H.x + tangentY * H.y + normal * H.z);
}
// Normal Distribution function
float D_GGX(float dotNH, float roughness)
{
- float alpha = roughness * roughness;
- float alpha2 = alpha * alpha;
- float denom = dotNH * dotNH * (alpha2 - 1.0) + 1.0;
- return (alpha2)/(PI * denom*denom);
+ float alpha = roughness * roughness;
+ float alpha2 = alpha * alpha;
+ float denom = dotNH * dotNH * (alpha2 - 1.0) + 1.0;
+ return (alpha2)/(PI * denom*denom);
}
vec4 prefilterEnvMap(vec3 R)
{
- vec3 N = R;
- vec3 V = R;
- vec4 color = vec4(0.0);
- float totalWeight = 0.0;
- float envMapDim = float(textureSize(reflectionProbes, 0).s);
+ vec3 N = R;
+ vec3 V = R;
+ vec4 color = vec4(0.0);
+ float totalWeight = 0.0;
+ float envMapDim = float(textureSize(reflectionProbes, 0).s);
float roughness = mipLevel/max_probe_lod;
- int numSamples = max(int(32*roughness), 1);
+ int numSamples = max(int(PROBE_FILTER_SAMPLES*roughness), 1);
float numMips = max_probe_lod+1;
- for(uint i = 0u; i < numSamples; i++) {
- vec2 Xi = hammersley2d(i, numSamples);
- vec3 H = importanceSample_GGX(Xi, roughness, N);
- vec3 L = 2.0 * dot(V, H) * H - V;
- float dotNL = clamp(dot(N, L), 0.0, 1.0);
- if(dotNL > 0.0) {
- // Filtering based on https://placeholderart.wordpress.com/2015/07/28/implementation-notes-runtime-environment-map-filtering-for-image-based-lighting/
-
- float dotNH = clamp(dot(N, H), 0.0, 1.0);
- float dotVH = clamp(dot(V, H), 0.0, 1.0);
-
- // Probability Distribution Function
- float pdf = D_GGX(dotNH, roughness) * dotNH / (4.0 * dotVH) + 0.0001;
- // Slid angle of current smple
- float omegaS = 1.0 / (float(numSamples) * pdf);
- // Solid angle of 1 pixel across all cube faces
- float omegaP = 4.0 * PI / (6.0 * envMapDim * envMapDim);
- // Biased (+1.0) mip level for better result
- float mipLevel = roughness == 0.0 ? 0.0 : clamp(0.5 * log2(omegaS / omegaP) + 1.0, 0.0f, max_probe_lod);
- color += textureLod(reflectionProbes, vec4(L, sourceIdx), mipLevel) * dotNL;
- totalWeight += dotNL;
- }
- }
- return (color / totalWeight);
+ for(uint i = 0u; i < numSamples; i++) {
+ vec2 Xi = hammersley2d(i, numSamples);
+ vec3 H = importanceSample_GGX(Xi, roughness, N);
+ vec3 L = 2.0 * dot(V, H) * H - V;
+ float dotNL = clamp(dot(N, L), 0.0, 1.0);
+ if(dotNL > 0.0) {
+ // Filtering based on https://placeholderart.wordpress.com/2015/07/28/implementation-notes-runtime-environment-map-filtering-for-image-based-lighting/
+
+ float dotNH = clamp(dot(N, H), 0.0, 1.0);
+ float dotVH = clamp(dot(V, H), 0.0, 1.0);
+
+ // Probability Distribution Function
+ float pdf = D_GGX(dotNH, roughness) * dotNH / (4.0 * dotVH) + 0.0001;
+ // Slid angle of current smple
+ float omegaS = 1.0 / (float(numSamples) * pdf);
+ // Solid angle of 1 pixel across all cube faces
+ float omegaP = 4.0 * PI / (6.0 * envMapDim * envMapDim);
+ // Biased (+1.0) mip level for better result
+ float mipLevel = roughness == 0.0 ? 0.0 : clamp(0.5 * log2(omegaS / omegaP) + 1.0, 0.0f, max_probe_lod);
+ color += textureLod(reflectionProbes, vec4(L, sourceIdx), mipLevel) * dotNL;
+ totalWeight += dotNL;
+ }
+ }
+ return (color / totalWeight);
}
void main()
-{
- vec3 N = normalize(vary_dir);
- frag_color = max(prefilterEnvMap(N), vec4(0));
+{
+ vec3 N = normalize(vary_dir);
+ frag_color = max(prefilterEnvMap(N), vec4(0));
+ frag_color.a *= probe_strength;
}
// =============================================================================================================
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-29 12:01:18 +0000