Initial commit using tesselation shader to create curves

Disables glslangValidator because of file extension mess up.

1 files changed, 30 insertions, 0 deletions

diff --git a/gfx/gl/shaders/networkCurve.tes b/gfx/gl/shaders/networkCurve.tes
new file mode 100644
index 0000000..a02503c
--- /dev/null
+++ b/gfx/gl/shaders/networkCurve.tes
@@ -0,0 +1,30 @@
+#version 460 core
+layout(isolines, equal_spacing, cw) in;
+
+flat in ivec3 c_apos[];
+flat in ivec3 c_bpos[];
+flat in ivec3 c_cpos[];
+flat in float c_reps[];
+flat in float c_aangle[];
+flat in float c_bangle[];
+flat in float c_radius[];
+
+flat out ivec3 pos;
+flat out mat2 rot;
+flat out float tpos;
+
+mat2
+getRot(float angle)
+{
+	return mat2(cos(angle), sin(angle), -sin(angle), cos(angle));
+}
+
+void
+main()
+{
+	float angle = mix(c_bangle[0], c_aangle[0], gl_TessCoord.x);
+	int height = int(mix(c_bpos[0].z, c_apos[0].z, gl_TessCoord.x)) - c_cpos[0].z;
+	rot = getRot(angle);
+	tpos = c_reps[0] * gl_TessCoord.x;
+	pos = c_cpos[0] + ivec3(rot * vec2(c_radius[0], 0), height);
+}