public RotateTransform(Angle angle)
{
Angle = angle;
Point = new PxPoint(0, 0);
HasCentre = false;
Matrix = PxMatrix.Rotate(angle.ToRadians());
}
public RotateTransform(Angle angle, float x, float y)
{
Angle = angle;
Point = new PxPoint(x, y);
HasCentre = true;
Matrix =
PxMatrix.Translate(-x, -y) *
PxMatrix.Rotate(angle.ToRadians()) *
PxMatrix.Translate(x, y);
}
public PxMatrix Resolve(IElement element, IFrameContext context)
{
if (!HasCentre)
{
return(PxMatrix.Rotate(_radians));
}
var x = X.Resolve(element, context);
var y = Y.Resolve(element, context);
return
(PxMatrix.Translate(-x, -y) *
PxMatrix.Rotate(_radians) *
PxMatrix.Translate(x, y));
}