I have loaded a .RAW file into a 2x2 array in my class. The way I am rendering it works fine but I am struggling to get the camera to move on top of the terrain. The terrain renders from 0,0,0 (x,y,z) as that is where I put my camera. My camera class allows to the camera to move through the scene. I want to be able to walk on top of the terrain with some basic collision detection (if possible).Any tips on where to go for this or any tips? 
How to render a terrain using height maps and getting basic collision detection on top of the terrain and camera (moving on the terrain)
opengl