Name
cmatrix:InitRotate -- init rotate
Synopsis
cmatrix:InitRotate(radians)
Function
Initializes the matrix to a transformation that rotates by radians. The direction of rotation is defined such that positive angles rotate in the direction from the positive X axis toward the positive Y axis. With the default axis orientation of Cairo, positive angles rotate in a clockwise direction.

Inputs
radians
angle of rotation in radians
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