computeshader

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);
+}