code: public void addCameraMatrix(DMatrixRMaj viewI ) {
  		Projective pr = cameras.grow();
  		PerspectiveOps.projectionSplit(viewI,pr.A,pr.a);
  	}
docs: Adds a projective transform which describes the relationship between a 3D point viewed in
  the view[i] and a projection viewed by a camera located at the origin.
  
  The projective is defined as P[i]=[A[i] | a[i]] where P is 3 by 4 matrix.
  
  @param viewI projective matrix representing the transform from the current camera
  to the coordinate system's origin. 3 x 4