planes,very beginner

I’m a newbe.
I have this doubt:
Can exist a plane that be non included in xy or xz or yz axes planes(what is the correct name)?
sorry but i can’t visualize the planes in my head .
How i can know in what axis planes is contained any plane?


Do you mean planes for clipping or just for drawing? Both can be anything you like but how you do it is different.

I have a profile on a plane and after applied a matrix that rotates the plane I wish find in what axis plane(xy,zy, zx)lies the rotated plane.

You can retrieve the transformation matrices with

GLfloat projMatrix[16];
GLfloat modelMatrix[16];

look at

if you don’t know how the matrices work