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Update RotateUV.gdshaderinc

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RotateUV node shader logic simplified.
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Digvijaysinh Gohil 2023-12-10 18:21:52 +05:30
parent e6e36ec6c6
commit 4628159c6e
1 changed files with 6 additions and 12 deletions
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18
addons/ShaderLib/UV/RotateUV.gdshaderinc
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@ -1,16 +1,10 @@
vec2 rotate_uv(vec2 uv, vec2 center, float rotation, bool use_degrees){
float _angle = rotation;
if(use_degrees){
rotation = rotation * (3.1415926/180.0);
_angle = rotation * (3.1415926/180.0);
}
vec2 _uv = uv;
_uv -= center;
float _s = sin(rotation);
float _c = cos(rotation);
mat2 _rotation_matrix = mat2(vec2(_c, -_s), vec2(_s, _c));
_rotation_matrix *= 0.5;
_rotation_matrix += 0.5;
_rotation_matrix = _rotation_matrix * 2.0 - 1.0;
_uv.xy = _uv.xy * _rotation_matrix;
_uv += center;
return _uv;
vec2 _delta = uv - center;
float _x = cos(_angle) * _delta.x - sin(_angle) * _delta.y;
float _y = sin(_angle) * _delta.x + cos(_angle) * _delta.y;
return vec2(_x + center.x, _y + center.y);
}