stub accumulate shader

tadgem · Jul 2, 2024 · 65ba24a · 65ba24a
1 parent 95f4d8e
commit 65ba24a
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diff --git a/examples/ssgi/compile_shaders.bat b/examples/ssgi/compile_shaders.bat
@@ -5,3 +5,5 @@
 %VULKAN_SDK%/bin/glslc.exe shaders/lights.frag -o shaders/lights.frag.spv
 
 %VULKAN_SDK%/bin/glslc.exe shaders/SSGI.frag -o shaders/ssgi.frag.spv
+
+%VULKAN_SDK%/bin/glslc.exe shaders/accumulate.frag -o shaders/accumulate.frag.spv
diff --git a/examples/ssgi/shaders/SSGIold.frag b/examples/ssgi/shaders/SSGIold.frag
diff --git a/examples/ssgi/shaders/SSGIold2.frag b/examples/ssgi/shaders/SSGIold2.frag
diff --git a/examples/ssgi/shaders/accumulate.frag b/examples/ssgi/shaders/accumulate.frag
@@ -0,0 +1,52 @@
+#version 450
+
+// Screen Space Horizon GI
+// Adapted from https://www.shadertoy.com/view/dsGBzW
+// which is an implementation of this paper:  https://arxiv.org/pdf/2301.11376.pdf
+
+#include "SSGI.utils.glsl"
+layout(location = 0) in vec2 UV;
+
+layout(location = 0) out vec4 outColor;
+
+layout(push_constant, std430) uniform pc {
+    mat4 view;
+    mat4 proj;
+    vec4 resolutionFov;
+    vec4 eyePos; 
+    vec4 eyeRotation;
+    int FrameIndex;
+};
+
+#define fragCoord gl_FragCoord.xy
+#define RES resolutionFov.xy
+#define IRES 1.0 / resolutionFov.xy
+#define STEP_COUNT 32
+
+vec4 SampleMB(vec2 uv, vec3 PPos, vec3 Normal, vec3 LPos, mat3 LEyeMat, out float Weight) {
+    //A weighted sample for a bilinear mix
+    vec2 ClampedUV = clamp(uv,vec2(1.5),RES-0.5);
+    vec4 C = texture(iChannel3,ClampedUV*IRES);
+    vec3 SDir = normalize(vec3((uv*IRES*2.-1.)*(ASPECT*CFOV),1.)*LEyeMat);
+    Weight = max(0.0001,float(abs(dot(Normal,LPos+SDir*C.w-PPos))<0.01))*
+              max(0.001,float(dot(Normal,normalize(FloatToVec3(C.z)*2.-1.))>0.9));
+    return texture(iChannel2,ClampedUV*IRES)*Weight;
+}
+
+vec4 ManualBilinear(vec2 uv, vec3 PPos, vec3 Normal, vec3 LPos, mat3 LEyeMat, out float Weight) {
+    //Returns weighted RGB sum + weight sum
+    vec2 Fuv = floor(uv-0.4999)+0.5;
+    float W0,W1,W2,W3;
+    vec4 S0 = SampleMB(Fuv,PPos,Normal,LPos,LEyeMat,W0);
+    vec4 S1 = SampleMB(Fuv+vec2(1.,0.),PPos,Normal,LPos,LEyeMat,W1);
+    vec4 S2 = SampleMB(Fuv+vec2(0.,1.),PPos,Normal,LPos,LEyeMat,W2);
+    vec4 S3 = SampleMB(Fuv+vec2(1.),PPos,Normal,LPos,LEyeMat,W3);
+    vec2 fuv = fract(uv-0.4999);
+    Weight = mix(mix(W0,W1,fuv.x),mix(W2,W3,fuv.x),fuv.y);
+    return mix(mix(S0,S1,fuv.x),mix(S2,S3,fuv.x),fuv.y)/Weight;
+}
+
+void main() {
+    vec4 Output = vec4(0.0, 0.0, 0.0, 1.0);
+
+}
Original file line number	Diff line number	Diff line change
Expand Up		@@ -5,3 +5,5 @@
		%VULKAN_SDK%/bin/glslc.exe shaders/lights.frag -o shaders/lights.frag.spv

		%VULKAN_SDK%/bin/glslc.exe shaders/SSGI.frag -o shaders/ssgi.frag.spv

		%VULKAN_SDK%/bin/glslc.exe shaders/accumulate.frag -o shaders/accumulate.frag.spv