astro_field.py 文件源码

def _rotVector_(self, v, angle, axis):
        """
        Rotate a vector by an angle around an axis
        INPUTS:
            v:    3-dim float array
            angle:    float, the rotation angle in radians
            axis: string, 'x', 'y', or 'z'

        RETURNS:
            float array(3):  the rotated vector
        """
        # axisd = {'x':[1,0,0], 'y':[0,1,0], 'z':[0,0,1]}

        # construct quaternion and rotate...
        rot = cgt.quat()
        rot.fromAngleAxis(angle, axis)
        return list(rot.rotateVec(v))