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-rw-r--r--samples/OpenGL/compute_shader/positiongen.glsl24
1 files changed, 24 insertions, 0 deletions
diff --git a/samples/OpenGL/compute_shader/positiongen.glsl b/samples/OpenGL/compute_shader/positiongen.glsl
new file mode 100644
index 0000000..99018b6
--- /dev/null
+++ b/samples/OpenGL/compute_shader/positiongen.glsl
@@ -0,0 +1,24 @@
+#version 430
+
+layout( local_size_x = 16, local_size_y = 16 ) in;
+layout(std430) buffer;
+layout(binding = 0) buffer w_output {
+ vec4 data[];
+};
+
+uniform float u_time;
+
+void main()
+{
+ uvec3 GlobalSize = gl_WorkGroupSize * gl_NumWorkGroups;
+ uint GlobalInvocationIndex =
+ GlobalSize.x * GlobalSize.y * gl_GlobalInvocationID.z
+ + GlobalSize.x * gl_GlobalInvocationID.y
+ + gl_GlobalInvocationID.x;
+
+ vec2 p = 2*vec2(gl_GlobalInvocationID.xy)/GlobalSize.xy - 1;
+
+ float z = sin(10.*p.x + u_time) + sin(30.*p.y + 0.1*u_time);
+
+ data[GlobalInvocationIndex] = vec4(p, z*0.25, 1);
+}