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#version 460 core
layout(vertices = 1) out;
flat in ivec3 pos[][2];
flat in ivec2 cpos[];
flat in float reps[];
flat in float angles[][2];
flat in float radius[];
flat out ivec3 c_pos[][2];
flat out ivec2 c_cpos[];
flat out float c_reps[];
flat out float c_angles[][2];
flat out float c_radius[];
float
segments()
{
const float arc = angles[gl_InvocationID][0] - angles[gl_InvocationID][1];
const float error = 100.;
const float diff = acos(1.f - (error / radius[gl_InvocationID]));
return clamp(arc / diff, arc, 180);
}
void
main()
{
c_pos[gl_InvocationID] = pos[gl_InvocationID];
c_cpos[gl_InvocationID] = cpos[gl_InvocationID];
c_reps[gl_InvocationID] = reps[gl_InvocationID];
c_angles[gl_InvocationID] = angles[gl_InvocationID];
c_radius[gl_InvocationID] = radius[gl_InvocationID];
gl_TessLevelOuter[0] = 1;
gl_TessLevelOuter[1] = segments();
}
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