Depth Test not working

OpenGL OpenGL: Basic Coding
1

Hi everyone, I have to do a particle simulation and all the particles are nothing more than glutSolidSpheres.

However I’m unable to get the depth test to work:

It’s displaying the spheres that were drawn later on top of the others.


main()
{
glut init functions...

glEnable(GL_CULL_FACE);
  glEnable(GL_COLOR_MATERIAL);
  glClearDepth(1.0f); // any value I put here doesn't matter!?!
  glEnable (GL_DEPTH_TEST); 
  glDepthFunc(GL_LESS); // shouldn't even be needed 
  glDepthMask(GL_TRUE);
  glEnable (GL_LIGHTING); 
  glEnable (GL_LIGHT0);
  glShadeModel (GL_SMOOTH); 

  
  glLightfv(GL_LIGHT0, GL_SPECULAR, whiteSpecularLight);
  glLightfv(GL_LIGHT0, GL_AMBIENT, blackAmbientLight);
  glLightfv(GL_LIGHT0, GL_DIFFUSE, whiteDiffuseLight);

callbacks and mainloop...
}

void display() // used also as idleFunc
{
glClearColor (0.0,0.0,0.0,1.0); //
  glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

....
}

Sorry for the dumb question but i’m stuck for 4hours in this stupid problem, it’s pulling my hair out! ( I’ve googled a lot, copied code from others and nothing)
Can someone help me out? It’s as if depth test was disabled.

It’s really urgent, thanks

2

Remove glClearDepth(1.0f), as default value should work.
Are you sure you create the window with a depth buffer, in the glut init ?

3

Hi!

Thanks

I gave up working and went to try the program in other computer without changing anything and it worked! it looks like a driver issue or a problem in freeglut.h (i’m in linux).

But thanks a lot for your time :wink:

4

Can you answer my question ? Specifically, what is your exact line with glutInitDisplayMode ?