code: public static FMatrixRMaj pinholeToMatrix(float fx, float fy, float skew,
  											  float xc, float yc) {
  		return ImplPerspectiveOps_F32.pinholeToMatrix(fx, fy, skew, xc, yc, null);
  	}
docs: Given the intrinsic parameters create a calibration matrix
  
  @param fx Focal length x-axis in pixels
  @param fy Focal length y-axis in pixels
  @param skew skew in pixels
  @param xc camera center x-axis in pixels
  @param yc center center y-axis in pixels
  @return Calibration matrix 3x3