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Pyromuffin/Rotation about a point.cs

Created July 10, 2018 07:12
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Rotation about a point.cs
Matrix4x4 mat;
mat = Matrix4x4.Translate(new Vector3(centerPoint.x, centerPoint.y));
mat *= Matrix4x4.Rotate(Quaternion.AngleAxis(degrees, Vector3.forward));
mat *= Matrix4x4.Translate(new Vector3(-centerPoint.x, -centerPoint.y));
Basis basis;
basis.right = new Vector2(mat.m00, mat.m01 );
basis.up = new Vector2(mat.m10 , mat.m11);
basis.offset = new Vector2(mat.m03, mat.m13);
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