Sets the elements of the 2x2 matrix m so it becomes a 2D rotation matrix.
m
The resulting matrix will rotate points in the xy-plane around the origin when multiplied by a column vector (see mulV).
mulV
The direction of rotation will be clockwise for positive values of r
r
a 2x2 matrix object
the (inverse) rotation as an angle in radians
m set to be a 2D rotation matrix
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Sets the elements of the 2x2 matrix
mso it becomes a 2D rotation matrix.The resulting matrix will rotate points in the xy-plane around the origin when multiplied by a column vector (see
mulV).The direction of rotation will be clockwise for positive values of
r