Also note that the default pyglet projection is orthogonal. Rotating
about the Y axis will not look "3D" this way, it will just look like
the triangle is being scaled along the x-axis. Maybe this is what you
want, but you may want a perspective projection instead. For example:
@window.event
def on_resize(width, height):
glViewport(0, 0, width, height)
glMatrixMode(GL_PROJECTION)
glLoadIdentity()
gluPerspective(70, 1.0*width/height, 0.1, 1000.0)
glMatrixMode(GL_MODELVIEW)
glLoadIdentity()
hth,
-Casey
On Thu, Apr 22, 2010 at 4:08 PM, Txema Vicente <[email protected]> wrote:
> May be your problem is in the projection matrix.
> The Manual says: "The default pyglet projection has a depth range of (-1, 1)
> -- images drawn with a z value outside this range will not be visible". You
> are rotating a very big triangle, so you see only a tiny slice,
>
> If you want to see the Z axis, lets say a depth range from -2000 to 2000,
> you have to override the default handler:
>
> @window.event
> def on_resize(width, height):
> glViewport(0, 0, width, height)
> glMatrixMode(gl.GL_PROJECTION)
> glLoadIdentity()
> glOrtho(0, width, 0, height, -2000, 2000)
> glMatrixMode(gl.GL_MODELVIEW)
>
> I think this could help you:
> http://groups.google.com/group/pyglet-users/web/pyglet-projection-matrix
>
> El 22/04/2010 4:31, Alejandro Castellanos escribió:
>
> What I'm doing is basically this, so here's the code:
>
> ------------------------------------------------------------
>
> # -*- coding: cp1252 -*-
> import pyglet
> import math
> from pyglet.gl import *
>
> # Direct OpenGL commands to this window.
> window = pyglet.window.Window(resizable=True)
>
> @window.event
> def on_draw():
> glClear(GL_COLOR_BUFFER_BIT)
> glLoadIdentity()
>
> #glTranslatef(50.0,0.0,0.0)#Sirve para mover la vista de la
> ventana(o algo asi).
>
> rtri = 15
>
> glRotatef(rtri,0.0,0.0,1.0)#Rotating around Z.
> #glRotatef(rtri,0.0,1.0,0.0)#Rotating around Y.
> #glRotatef(rtri,1.0,0.0,0.0)#Rotting around X.
>
> #COMENZANDO A DIBUJAR EL TRIANGULO.
> glBegin(GL_TRIANGLES)
> glColor3f(1.0,0.0,0.0)#Color, justo antes del primer vertice (en
> RGB---ROJO).
> glVertex3f(window.width/2,window.height,0.0)#SUPERIOR.
>
> glColor3f(0.0,1.0,0.0)#Color, justo antes del segundo vertice (en
> RGB---VERDE).
> glVertex3f(100.0,0.0,0.0)#INFERIOR IZQUIERDO.
>
> glColor3f(0.0,0.0,1.0)#Color, justo antes del tercer vertice (en
> RGB---AZUL).
> glVertex3f(window.width,0.0,0.0)#INFERIOR DERECHO.
> glEnd()
>
> pyglet.app.run()
>
> ------------------------------------------------------------
>
> The triangle basically disappears if I don't use decimals in 'rtri'.
> If I use the decimals, it is when the triangle starts getting
> 'slashed.'
>
> On 21 abr, 19:25, Greg Ewing <[email protected]> wrote:
>
>
> On 22/04/10 13:21, Alejandro Castellanos wrote:
>
>
>
> But I'm having to use glRotatef(rtri, 0.0, 0.0, 1.0); which, yet
> again, rotates around the Z axis but 'slashes' the figure if I attempt
> to rotate around X or Y.
>
>
> You'll have to show us the code you're using to rotate
> about the other axes.
>
> It should be something like
>
> glRotatef(rtri, 1.0, 0.0, 0.0) # x-axis
> glRotatef(rtri, 0.0, 1.0, 0.0) # y-axis
>
> As for the "slashing", it sounds like the triangle
> is getting clipped by something, maybe the near or
> far plane. It might be that the triangle is actually
> getting rotated correctly, but you're having trouble
> seeing it because of clipping.
>
> --
> Greg
>
> --
> 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
> athttp://groups.google.com/group/pyglet-users?hl=en.
>
>
>
>
> --
> 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.
>
--
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.
