On 12/6/07, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote:
>
> trying to do the nehe tutorial lessons 5 (http://nehe.gamedev.net/data/
> lessons/lesson.asp?lesson=05) I came up with this, but I only get a
> black screen:
>
> from pyglet.gl import *
> from pyglet import window
>
> # The OpenGL context is created only when you create a window. Any
> calls
> # to OpenGL before a window is created will fail.
> win = window.Window(visible=False)
>
> ...
>
> glViewport(0, 0, win.width, win.height)
> glMatrixMode(GL_PROJECTION)
> glLoadIdentity()
> gluPerspective(45, win.width/ float(win.height), 0.1, 100)
> glMatrixMode(GL_MODELVIEW)
> glLoadIdentity()
>
> win.set_visible()
> while not win.has_exit:
> win.dispatch_events()
> ...
You've fallen into a common trap: the pyglet window sets up an
orthogonal OpenGL projection in its default on_resize() event handler.
This is called during the very first dispatch_events(), so it
replaces the projection projection matrix that you've set up.
The solution is to set up the projection matrix and viewport in an
on_resize handler:
@win.event
def on_resize(width, height):
glViewport(0, 0, width, height)
glMatrixMode(GL_PROJECTION)
... etc.
glMatrixMode(GL_MODELVIEW)
This replaces the current initialisation code you have to set up the
projection. As a bonus, your window can now be made resizable, and
the projection and viewport will be kept up-to-date.
Alex.
--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups
"pyglet-users" group.
To post to this group, send email to [email protected]
To unsubscribe from this group, send email to [EMAIL PROTECTED]
For more options, visit this group at
http://groups.google.com/group/pyglet-users?hl=en
-~----------~----~----~----~------~----~------~--~---
