code: public FDistort rotate( double angleInputToOutput ) {
  		PixelTransform<Point2D_F32> outputToInput = DistortSupport.transformRotate(input.width/2,input.height/2,
  				output.width/2,output.height/2,(float)angleInputToOutput);
  
  		return transform(outputToInput);
  	}
docs: Applies a distortion which will rotate the input image by the specified amount.