S3D : the devil's triangle

[1micha.elok]

You need to push and pop the transformation when drawing the plane, else the pyramid's position will be relative to the plane's position and rotations.
...
I added a translate into the screen before drawing the plane and the pyramid so that I could see what the pyramid was up to.

It's very exciting to learn S3D, ... "one small step for man, one giant leap for humankind" .... 
Next, I plan to make a very simple game "The Devil's Triangle"