OpenGL one object inside the other

[kljajo]

Hi,

i am facing problem with object rendering on the screen in OpenGL.
I am having a ring object which i draw on the screen. I am using same object
(scaled) to put it inside first one. The problem is that second object is put over the first and not inside it:

glPushMatrix();
glRotatex( aFrame << 16, 1 << 16 , 0 , 0 );
DrawBox( 1.7f, 1.7f, 1.7f );
glPopMatrix();
glPushMatrix();
glRotatex( (-aFrame-10) << 16, 0 , 1 << 16 , 0 );
DrawBox( 1.f, 1.f, 1.f );
glPopMatrix();

...


DrawBox( GLfloat aSizeX, GLfloat aSizeY, GLfloat aSizeZ ) {
glScalef( aSizeX, aSizeY, aSizeZ );
glDrawElements( GL_TRIANGLES, 512 * 3, GL_UNSIGNED_BYTE, triangles);
}

How can i place one object inside the other?
Thanks.

[kljajo]

Ok, i found soluton.

in the init part i have to put:
glEnable( GL_DEPTH_TEST );
glDepthFunc(GL_LEQUAL);

also i had to add
"EGL_DEPTH_SIZE,16"
in properties for the wanted EGLSurface.
It seems that initial EGL_DEPTH_SIZE is 0 so no correct overlapping occur.