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Try to cull degenerate bezier segments.

This commit is contained in:
Taylor Holliday 2022-11-15 09:15:06 -08:00
parent a242173380
commit 8c45501d0b
1 changed files with 8 additions and 0 deletions
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8
Sources/vger/vger.mm
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@ -241,6 +241,14 @@ void vgerStrokeRect(vgerContext vg, vector_float2 min, vector_float2 max, float
void vgerStrokeBezier(vgerContext vg, vgerBezierSegment s, float width, vgerPaintIndex paint) {
// Are the points degenerate?
// This may not work in general because these are pre-transformed coordinates.
// Could instead check in the vertex function after transforming.
const float epsilon = 0.001;
if (simd_distance_squared(s.a, s.b) < epsilon && simd_distance_squared(s.a, s.c) < epsilon) {
return;
}
// Are the points collinear?
float3x3 M = { float3{s.a.x, s.a.y, 1}, float3{s.b.x, s.b.y, 1}, float3{s.c.x, s.c.y, 1} };
if(fabsf(determinant(M)) < FLT_EPSILON) {