Re: [PyOpenGL-Users] A big problem with glOrtho

[projetmbc <pro...@cl...>]

Thanks for the information. Finally the problem was another  :-[  :
                GL.glEnable(GL.GL_CULL_FACE)

Where there are mathematic ( from the OpenGL's point of view) 
definitions of the different perspectives ?

Best regards and a great thanks for the help.
Christophe.


> Definitely recommend using a perspective matrix for your first OpenGL 
> programs.  I use this class for perspective:
>
> class glLibView3D():
>     def __init__(self,rect,angle,near=0.1,far=1000.0):
>         self.rect = list(rect)
>         self.angle = angle
>         self.near = near
>         self.far = far
>     def set_angle(self,value):
>         self.angle = angle
>     def set_near(self,value):
>         self.near = value
>     def set_far(self,value):
>         self.far = value
>     def set_view(self):
>         glViewport(*self.rect)
>         glMatrixMode(GL_PROJECTION)
>         glLoadIdentity()
>         
> gluPerspective(self.angle,float(self.rect[2])/float(self.rect[3]),\
>         self.near,self.far)
>         glMatrixMode(GL_MODELVIEW)
>         glLoadIdentity()
>
> HTH,
> Ian