I just started working with OpenGL and I have this problem with glFrustum and gluLookAt. I have to obtain the first image but the best I could get was the second.
As you can see I need to get a 1 point perspective, but no matter how I tried I can only get the 3-point perspective on that cube. I read quite a few tutorials and posts about frustum and gluLookAt but none would work for me and I've been stuck on this for 2 days now.
This is my code so far:
glMatrixMode(GL_PROJECTION); glLoadIdentity(); glFrustum(-5, 5, -5, 5, 5, 100); gluLookAt(7,7,10,0,0,0,0,1,0); glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); glMatrixMode(GL_MODELVIEW); glLoadIdentity(); glPushMatrix(); DisplayAxe(); DisplayObiect(); //displays the cube glPopMatrix();
The cube is of side 5.
Now if anyone could help me or at least give me a hint on how to use glFrustum and gluLookAt to get that 1-point perspective it would be awesome.