Merge branch 'glmax'

1 files changed, 37 insertions, 0 deletions

diff --git a/gfx/gl/shaders/networkCurve.tesc b/gfx/gl/shaders/networkCurve.tesc
new file mode 100644
index 0000000..5a6e449
--- /dev/null
+++ b/gfx/gl/shaders/networkCurve.tesc
@@ -0,0 +1,37 @@
+#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();
+}