From 55937807aeca2b32185241d098d4b494d7e0f366 Mon Sep 17 00:00:00 2001
From: Alexander Gauggel <agauggel@uni-koblenz.de>
Date: Tue, 13 Jul 2021 11:47:49 +0200
Subject: [PATCH] [#87] Add task index visualisation
---
.../mesh_shader/resources/shaders/shader.frag | 25 ++++++++++++++++++-
.../mesh_shader/resources/shaders/shader.mesh | 3 +++
2 files changed, 27 insertions(+), 1 deletion(-)
diff --git a/projects/mesh_shader/resources/shaders/shader.frag b/projects/mesh_shader/resources/shaders/shader.frag
index c3740e2c..f4f6982f 100644
--- a/projects/mesh_shader/resources/shaders/shader.frag
+++ b/projects/mesh_shader/resources/shaders/shader.frag
@@ -2,8 +2,31 @@
#extension GL_ARB_separate_shader_objects : enable
layout(location = 0) in vec3 passNormal;
+layout(location = 1) in flat uint passTaskIndex;
layout(location = 0) out vec3 outColor;
+uint lowbias32(uint x)
+{
+ x ^= x >> 16;
+ x *= 0x7feb352dU;
+ x ^= x >> 15;
+ x *= 0x846ca68bU;
+ x ^= x >> 16;
+ return x;
+}
+
+float hashToFloat(uint hash){
+ return (hash % 255) / 255.f;
+}
+
+vec3 colorFromIndex(uint i){
+ return vec3(
+ hashToFloat(lowbias32(i+0)),
+ hashToFloat(lowbias32(i+1)),
+ hashToFloat(lowbias32(i+2)));
+}
+
void main() {
- outColor = normalize(passNormal) * 0.5 +0.5;
+ outColor = normalize(passNormal) * 0.5 + 0.5;
+ outColor = colorFromIndex(passTaskIndex);
}
\ No newline at end of file
diff --git a/projects/mesh_shader/resources/shaders/shader.mesh b/projects/mesh_shader/resources/shaders/shader.mesh
index a120e432..848fca2c 100644
--- a/projects/mesh_shader/resources/shaders/shader.mesh
+++ b/projects/mesh_shader/resources/shaders/shader.mesh
@@ -12,6 +12,7 @@ layout( push_constant ) uniform constants{
};
layout(location = 0) out vec3 passNormal[];
+layout(location = 1) out uint passTaskIndex[];
struct Vertex
{
@@ -45,8 +46,10 @@ void main() {
vec3 inPos = vertices[index].position;
vec3 inNormal = vertices[index].normal;
+
gl_MeshVerticesNV[workIndex].gl_Position = mvp * vec4(inPos, 1);
passNormal[workIndex] = inNormal;
+ passTaskIndex[workIndex] = previousMeshGroupCount;
if(gl_LocalInvocationID.x == 0){
gl_PrimitiveCountNV = 10;
--
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