I'm new to 3D graphics, and I was trying to get ready to implement frustrum culling, using this tutorial: http://www.lighthouse3d.com/opengl/viewfrustum/index.php?gaplanes.

In their implementation, they use some classes for Plane and Vec3, which have methods for calculating the distance between a plane and a point (defined by a Vec3) and for defining the plane either as three clockwise points or as a point and a normal vector. I'm not experienced with C++, so I hope class and method are the right words.

So, do we have access to classes like that already in Android ? Or do I need to brush up on my matrix math and create my own?

Thanks.

You will need to create your own.

@tenfour4:
You could also have a search on http://code.google.com - I guess nearly every OpenGL ES framework/Android 3d lib already have classes like these.
E.g.:
http://code.google.com/p/apps-for-android/source/browse/trunk/HeightMapProfiler/src/com/android/heightmapprofiler/Vector3.java

So, you might not have to re-invent the wheel twice - though it might be a good learning experience to create them for your own,

http://code.google.com/p/libgdx/

That engine has the classes you want.