Re: [PyOpenGL-Users] help!!

[altern <al...@gm...>]

I think this is correct now (i am not very good at 3D). you were not 
setting the perspective. you also have to translate in the z axis before 
drawing to make sure the sphere is with the area rendered.

from OpenGL.GL import *
from OpenGL.GLU import *
from OpenGL.GLUT import *
from math import *


def display():

    global obj1
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT)

    materialColor = [0.1745, 0.0, 0.1, 0.0] #the light scattered off the 
environment
    diffuseColor  = [0.1, 0.0, 0.6, 0.0] #the light rays coming directly 
from source
    specularColor = [0.7, 0.6, 0.8, 0.0] #the light reflected off a 
shiny surface
    shininess = 80

    glMaterialfv(GL_FRONT, GL_AMBIENT, materialColor)
    glMaterialfv(GL_FRONT, GL_DIFFUSE, diffuseColor)
    glMaterialfv(GL_FRONT, GL_SPECULAR,specularColor)
    glMaterialf(GL_FRONT, GL_SHININESS, shininess)

    glPushMatrix()
    ##########################
    glTranslated(0.0,0.0,-11.0) # translate in the Z axix before drawing
    ##########################
    gluSphere(obj1, 3.0, 50, 50)
    glPopMatrix()

    glFlush()
    #glutSwapBuffers()


def init():
    glClearColor(0, 0, 0, 0)
    glMatrixMode(GL_PROJECTION)
    glLoadIdentity()
    ##########################
    gluPerspective(45.0, 250/250, 0.1, 10.0) # set perspective
    ##########################
    glLightfv(GL_LIGHT0, GL_AMBIENT,
    [0.0, 0.0, 0.0, 1.0])
    glLightfv(GL_LIGHT0, GL_DIFFUSE,
    [1.0, 1.0, 1.0, 1.0])
    glLightfv(GL_LIGHT0, GL_POSITION,
    [0.0, 3.0, 3.0, 0.0])
    glLightModelfv(GL_LIGHT_MODEL_AMBIENT,
    [0.2, 0.2, 0.2, 1.0])
    glEnable(GL_LIGHTING)
    glEnable(GL_LIGHT0)

if __name__ == "__main__":

  global obj1

  obj1 = gluNewQuadric()

  glutInit([])
  glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB)
  glutInitWindowSize(250, 250)
  glutCreateWindow('Hello GLUT')
  #glutSetDisplayFuncCall(display)
  glutDisplayFunc(display)
  #gluQuadricDrawStyle(obj1, GLU_FILL)
  init()
  glutMainLoop()



Eric Germaneau(e)k dio:
> PyOpenGL users,
> 
> Does someone can tell me why the following code does not work?
> I only get black screen?
> Thanks in advance!!
> 
>          Eric.
> 
> 
> *from OpenGL.GL import *
> from OpenGL.GLU import *
> from OpenGL.GLUT import *
> from math import *
> 
> 
> def display():
> 
>    global obj1
>    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT)
>   
>    materialColor = [0.1745, 0.0, 0.1, 0.0] #the light scattered off the 
> environment
>    diffuseColor  = [0.1, 0.0, 0.6, 0.0] #the light rays coming directly 
> from source
>    specularColor = [0.7, 0.6, 0.8, 0.0] #the light reflected off a shiny 
> surface
>    shininess = 80
>   
>    glMaterialfv(GL_FRONT, GL_AMBIENT, materialColor)
>    glMaterialfv(GL_FRONT, GL_DIFFUSE, diffuseColor)
>    glMaterialfv(GL_FRONT, GL_SPECULAR,specularColor)
>    glMaterialf(GL_FRONT, GL_SHININESS, shininess)
>   
>    glPushMatrix()
>    glTranslated(0.0,0.0,0.0)
>    gluSphere(obj1, 3.0, 50, 50)
>    glPopMatrix()  
>   
>    glFlush()  
>    #glutSwapBuffers()
>        
>   
> def init():
>    glClearColor(0, 0, 0, 0)
>    glMatrixMode(GL_PROJECTION)
>    glLoadIdentity()
>    glLightfv(GL_LIGHT0, GL_AMBIENT,
>    [0.0, 0.0, 0.0, 1.0])
>    glLightfv(GL_LIGHT0, GL_DIFFUSE,
>    [1.0, 1.0, 1.0, 1.0])
>    glLightfv(GL_LIGHT0, GL_POSITION,
>    [0.0, 3.0, 3.0, 0.0])
>    glLightModelfv(GL_LIGHT_MODEL_AMBIENT,
>    [0.2, 0.2, 0.2, 1.0])
>    glEnable(GL_LIGHTING)
>    glEnable(GL_LIGHT0)  
>   
> if __name__ == "__main__":
>      
>  global obj1
>  
>  obj1 = gluNewQuadric()
>  
>  glutInit([])
>  glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB)
>  glutInitWindowSize(250, 250)
>  glutCreateWindow('Hello GLUT')
>  #glutSetDisplayFuncCall(display)
>  glutDisplayFunc(display)
>  #gluQuadricDrawStyle(obj1, GLU_FILL)
>  init()
>  glutMainLoop()*
> 
> 
> -- 
> / "Love, Gift from Life, is given naturally."
> /
> Eric Germaneau <http://lcr.epfl.ch/page37437.html>
> Ecole polytechnique fédérale de Lausanne (EPFL)
> FSB - IPMC
> Laboratoire de Cristallographie(LCr) <http://lcr.epfl.ch>
> BSP 518
> CH-1015 Lausanne
> Switzerland
> eri...@ep... <mailto:eri...@ep...>
> /Tel./: +41 (0)21 / 693 06 36
> /Fax./: +41 (0)21 / 693 05 04
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> /skype/: aihaike
> 
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