I have world(3d) points of a cube. I also have 3 different 3x4 RT matrices, which transform the 3d points into 2d image points. What I want to do in Sketchup is to change the camera view point(orientation) according to the given RT matrices. But, the Sketchup camera object provides eye(the 3d point where camera is situated), target(the 3d point where the camera is looking at) and up(axis information). How do I convert my RT matrix into eye, target and up? I'll be using Sketchup Ruby API.