jacksmash

12-11-2007, 03:57 PM

ok... if I have my viewing perspective defined as:

gluPerspective(40.0, 1.0, 1.0, 500.0);

and I draw a quad like this:

glEnable(GL_QUADS);

glVertex3f(-100.0, -100.0, 0.0);

glVertex3f(-100.0, 100.0, 0.0);

glVertex3f(100.0, 100.0, 0.0);

glVertex3f(100.0, -100.0, 0.0);

glEnd();

Then where does it get drawn? Is z=0.0 right where the camera is? If so, then the quad would not be viewable as drawn. Is this correct?

gluPerspective(40.0, 1.0, 1.0, 500.0);

and I draw a quad like this:

glEnable(GL_QUADS);

glVertex3f(-100.0, -100.0, 0.0);

glVertex3f(-100.0, 100.0, 0.0);

glVertex3f(100.0, 100.0, 0.0);

glVertex3f(100.0, -100.0, 0.0);

glEnd();

Then where does it get drawn? Is z=0.0 right where the camera is? If so, then the quad would not be viewable as drawn. Is this correct?