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Fix angle_between

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Grant Sanderson
2023-01-12 14:43:52 -08:00
parent c6d3a9646c
commit 24afb2a24f
1 changed files with 8 additions and 1 deletions
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9
manimlib/shaders/quadratic_bezier_stroke/geom.glsl
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@ -52,9 +52,16 @@ const float ANGLE_THRESHOLD = 1e-3;
#INSERT rotate.glsl #INSERT rotate.glsl
float atan2(float y, float x){
// Normally atan is undefined for x = 0
if(x == 0) return sign(y) * 0.5 * PI;
return atan(y, x);
}
float angle_between(vec2 v1, vec2 v2){ float angle_between(vec2 v1, vec2 v2){
vec2 quot = complex_div(v2, v1); // Defined in get_xy_to_uv vec2 quot = complex_div(v2, v1); // Defined in get_xy_to_uv
return sign(quot.x) * atan(quot.y, quot.x); return atan2(quot.y, quot.x);
} }