[SOLVED]Cube is rendering faces out of order!

OpenGL Development
#1

The faces are being rendered in the order that I coded them! What do I do?!

INIT CODE

		glMatrixMode(GL_PROJECTION);
		glLoadIdentity();
		gluPerspective(fov, aspect, near, far);
		glMatrixMode(GL_MODELVIEW);

Cube rendering code

glPushMatrix();
		glBegin(GL_QUADS);
		{
			glColor3f(0.0f, 1.0f, 0.0f);     // Set The Color To Green
	        glVertex3f(1.0f, 1.0f, -1.0f);   // Top Right Of The Quad (Top)
	        glVertex3f(-1.0f, 1.0f, -1.0f);  // Top Left Of The Quad (Top)
	        glVertex3f(-1.0f, 1.0f, 1.0f);   // Bottom Left Of The Quad (Top)
	        glVertex3f(1.0f, 1.0f, 1.0f);    // Bottom Right Of The Quad (Top)

	        glColor3f(1.0f, 0.5f, 0.0f);     // Set The Color To Orange
	        glVertex3f(1.0f, -1.0f, 1.0f);   // Top Right Of The Quad (Bottom)
	        glVertex3f(-1.0f, -1.0f, 1.0f);  // Top Left Of The Quad (Bottom)
	        glVertex3f(-1.0f, -1.0f, -1.0f); // Bottom Left Of The Quad (Bottom)
	        glVertex3f(1.0f, -1.0f, -1.0f);  // Bottom Right Of The Quad (Bottom)

	        glColor3f(1.0f, 0.0f, 0.0f);     // Set The Color To Red
	        glVertex3f(1.0f, 1.0f, 1.0f);    // Top Right Of The Quad (Front)
	        glVertex3f(-1.0f, 1.0f, 1.0f);   // Top Left Of The Quad (Front)
	        glVertex3f(-1.0f, -1.0f, 1.0f);  // Bottom Left Of The Quad (Front)
	        glVertex3f(1.0f, -1.0f, 1.0f);   // Bottom Right Of The Quad (Front)

	        glColor3f(1.0f, 1.0f, 0.0f);     // Set The Color To Yellow
	        glVertex3f(1.0f, -1.0f, -1.0f);  // Bottom Left Of The Quad (Back)
	        glVertex3f(-1.0f, -1.0f, -1.0f); // Bottom Right Of The Quad (Back)
	        glVertex3f(-1.0f, 1.0f, -1.0f);  // Top Right Of The Quad (Back)
	        glVertex3f(1.0f, 1.0f, -1.0f);   // Top Left Of The Quad (Back)

	        glColor3f(0.0f, 0.0f, 1.0f);     // Set The Color To Blue
	        glVertex3f(-1.0f, 1.0f, 1.0f);   // Top Right Of The Quad (Left)
	        glVertex3f(-1.0f, 1.0f, -1.0f);  // Top Left Of The Quad (Left)
	        glVertex3f(-1.0f, -1.0f, -1.0f); // Bottom Left Of The Quad (Left)
	        glVertex3f(-1.0f, -1.0f, 1.0f);  // Bottom Right Of The Quad (Left)

	        glColor3f(1.0f, 0.0f, 1.0f);     // Set The Color To Violet
	        glVertex3f(1.0f, 1.0f, -1.0f);   // Top Right Of The Quad (Right)
	        glVertex3f(1.0f, 1.0f, 1.0f);    // Top Left Of The Quad (Right)
	        glVertex3f(1.0f, -1.0f, 1.0f);   // Bottom Left Of The Quad (Right)
	        glVertex3f(1.0f, -1.0f, -1.0f);  // Bottom Right Of The Quad (Right)
		}
		glEnd();
		glPopMatrix();
#2 

glEnable(GL_DEPTH_TEST);
glDepthFunc(GL_LEQUAL);

Add it to your GL initialisation.

#3

This form of OpenGL rendering is very, very deprecated.

[s]anyway add

glEnable(GL_DEPTH_TEST);
[/s]

with your init calls and make sure your

glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

edit: beat me to it :slight_smile: still make sure your glClear is right

#4

I suggest atleast starting with vertex arrays, or VBOs

google:

vertex buffer objects

or

vertex arrays

also:

glprogramming.com/red/

(a little outdated but much better than immediate mode)

#5

What does your initGL() method look like now?

#6

Yes. Depth testing still applies.

Just because GL11 is deprecated doesn’t mean ALL of it is deprecated.

Things like glEnable(), glDrawArrays/Elements() etc. are still used in later versions of the API.
It’s just the things used only for immediate mode.

#7

Make sure you’re requesting a depth buffer when you create your display, otherwise GL_DEPTH_TEST won’t have anything to work against.

#8

Can we see your initialization method? It has to be the depth testing. There’s no other reason its doing that.