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SimpleScene.py

#!/usr/bin/env python

'''
scene.c from the Redbook examples.  
Converted to PyGtkGLExt 3/2003 by Alif Wahid <awah005@users.sourceforge.net>
Converted to Python by Jason Petrone(jp@demonseed.net) 8/2000

/*
 * Copyright (c) 1993-1997, Silicon Graphics, Inc.
 * ALL RIGHTS RESERVED 
 * Permission to use, copy, modify, and distribute this software for 
 * any purpose and without fee is hereby granted, provided that the above
 * copyright notice appear in all copies and that both the copyright notice
 * and this permission notice appear in supporting documentation, and that 
 * the name of Silicon Graphics, Inc. not be used in advertising
 * or publicity pertaining to distribution of the software without specific,
 * written prior permission. 
 *
 * THE MATERIAL EMBODIED ON THIS SOFTWARE IS PROVIDED TO YOU "AS-IS"
 * AND WITHOUT WARRANTY OF ANY KIND, EXPRESS, IMPLIED OR OTHERWISE,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY OR
 * FITNESS FOR A PARTICULAR PURPOSE.  IN NO EVENT SHALL SILICON
 * GRAPHICS, INC.  BE LIABLE TO YOU OR ANYONE ELSE FOR ANY DIRECT,
 * SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY
 * KIND, OR ANY DAMAGES WHATSOEVER, INCLUDING WITHOUT LIMITATION,
 * LOSS OF PROFIT, LOSS OF USE, SAVINGS OR REVENUE, OR THE CLAIMS OF
 * THIRD PARTIES, WHETHER OR NOT SILICON GRAPHICS, INC.  HAS BEEN
 * ADVISED OF THE POSSIBILITY OF SUCH LOSS, HOWEVER CAUSED AND ON
 * ANY THEORY OF LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE
 * POSSESSION, USE OR PERFORMANCE OF THIS SOFTWARE.
 * 
 * US Government Users Restricted Rights 
 * Use, duplication, or disclosure by the Government is subject to
 * restrictions set forth in FAR 52.227.19(c)(2) or subparagraph
 * (c)(1)(ii) of the Rights in Technical Data and Computer Software
 * clause at DFARS 252.227-7013 and/or in similar or successor
 * clauses in the FAR or the DOD or NASA FAR Supplement.
 * Unpublished-- rights reserved under the copyright laws of the
 * United States.  Contractor/manufacturer is Silicon Graphics,
 * Inc., 2011 N.  Shoreline Blvd., Mountain View, CA 94039-7311.
 *
 * OpenGL(R) is a registered trademark of Silicon Graphics, Inc.
 */

/*
 *  scene.c
 *  This program demonstrates the use of the GL lighting model.
 *  Objects are drawn using a grey material characteristic.
 *  A single light source illuminates the objects.
 */

'''

import pygtk
pygtk.require('2.0')
from gtk.gtkgl.apputils import *

# Implement the GLScene interface
# to have the Simple scene rendered.

class Simple(GLScene):
    def __init__(self):
        GLScene.__init__(self,
                         gtk.gdkgl.MODE_RGB   |
                         gtk.gdkgl.MODE_DEPTH |
                         gtk.gdkgl.MODE_DOUBLE)
        
        self.light_ambient = [0.0, 0.0, 0.0, 1.0]
        self.light_diffuse = [1.0, 1.0, 1.0, 1.0]
        self.light_specular = [1.0, 1.0, 1.0, 1.0]
        # light_position is NOT default value
        self.light_position = [1.0, 1.0, 1.0, 0.0]
    
    #  Initialize material property, light source,
    # lighting model, and depth buffer.
    def init(self):
        glLightfv(GL_LIGHT0, GL_AMBIENT, self.light_ambient)
        glLightfv(GL_LIGHT0, GL_DIFFUSE, self.light_diffuse)
        glLightfv(GL_LIGHT0, GL_SPECULAR, self.light_specular)
        glLightfv(GL_LIGHT0, GL_POSITION, self.light_position)
        
        glEnable(GL_LIGHTING)
        glEnable(GL_LIGHT0)
        glEnable(GL_DEPTH_TEST)
    
    #  Here is where the light position is reset after the modeling
    #  transformation (glRotated) is called.  This places the
    #  light at a new position in world coordinates.  The cube
    #  represents the position of the light.
    def display(self, width, height):
        glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT)
        glPushMatrix()
        glRotatef(20.0, 1.0, 0.0, 0.0)
        glPushMatrix()
        glTranslatef(-0.75, 0.5, 0.0);
        glRotatef(90.0, 1.0, 0.0, 0.0)
        gtk.gdkgl.draw_torus(True, 0.275, 0.85, 15, 15)
        glPopMatrix()
        
        glPushMatrix()
        glTranslatef(-0.75, -0.5, 0.0);
        glRotatef(270.0, 1.0, 0.0, 0.0)
        gtk.gdkgl.draw_cone(True, 1.0, 2.0, 15, 15)
        glPopMatrix()
        
        glPushMatrix()
        glTranslatef(0.75, 0.0, -1.0)
        gtk.gdkgl.draw_sphere(True, 1.0, 15, 15)
        glPopMatrix()
        glPopMatrix()
    
    def reshape(self, width, height):
        glViewport(0, 0, width, height)
        glMatrixMode(GL_PROJECTION)
        glLoadIdentity()
        if width <= height:
            glOrtho(-2.5, 2.5, -2.5*height/width,2.5*height/width, -10.0, 10.0)
        else:
            glOrtho(-2.5*width/height,2.5*width/height, -2.5, 2.5, -10.0, 10.0)
        glMatrixMode(GL_MODELVIEW)
        glLoadIdentity()


if __name__ == '__main__':
    glscene = Simple()
    
    glapp = GLApplication(glscene)
    glapp.set_title('SimpleScene')
    glapp.run()

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