code: public static DMatrixRMaj createCameraMatrix( DMatrixRMaj R , Vector3D_F64 T ,
  												  @Nullable DMatrixRMaj K ,
  												  @Nullable DMatrixRMaj ret ) {
  		return ImplPerspectiveOps_F64.createCameraMatrix(R, T, K, ret);
  	}
docs: Create a 3x4 camera matrix. For calibrated camera P = [R|T].  For uncalibrated camera it is P = K*[R|T].
  
  @param R Rotation matrix. 3x3
  @param T Translation vector.
  @param K Optional camera calibration matrix 3x3.
  @param ret Storage for camera calibration matrix. If null a new instance will be created.
  @return Camera calibration matrix.