Make the object perpendicular to the terrain?

[pspeed]

Maybe this is useful:

Matrices, Transforms, and JME3

First let me sweep Quaternions under the rug. They are magic. They are wonderful. They are inscrutable. [image] So let’s forget about them. The beauty of the transformation matrix is that you can look at it and see what is going on. I will show you how… but first I will digress a little. I’m going to try to explain why so that maybe it’s easier to remember and confirm. Sorry if any of this is review. Vector Projection A unit vector represents direction. We say that because it is easy…