setToRotationSinCosXY method
Sets this transformation to be a rotation around a given point (x,y) by specifying the sin and cos of the rotation angle directly. The transformation matrix for the rotation has the value:
| cosTheta -sinTheta x-x*cos+y*sin | | sinTheta cosTheta y-x*sin-y*cos | | 0 0 1 |
@param sinTheta the sine of the rotation angle @param cosTheta the cosine of the rotation angle @param x the x-ordinate of the rotation point @param y the y-ordinate of the rotation point @return this transformation, with an updated matrix
Implementation
AffineTransformation setToRotationSinCosXY(
double sinTheta, double cosTheta, double x, double y) {
m00 = cosTheta;
m01 = -sinTheta;
m02 = x - x * cosTheta + y * sinTheta;
m10 = sinTheta;
m11 = cosTheta;
m12 = y - x * sinTheta - y * cosTheta;
return this;
}