"""GLUT replacement for the original checker.py demonstration code
Note:
Has no navigation code ATM.
"""
# This is statement is required by the build system to query build info
if __name__ == '__build__':
raise Exception
__version__='$Revision: 1.1.2.1 $'[11:-2]
__date__ = '$Date: 2004/11/15 01:10:45 $'[6:-2]
from OpenGL.GL import *
from OpenGL.GLU import *
from OpenGL.GLUT import *
import time, sys
def drawCone( position = (0,-1,0), radius=1, height=2, slices=50,stacks=10 ):
glPushMatrix()
try:
glTranslatef(*position)
glRotatef(250, 1, 0, 0)
glutSolidCone(radius, height, slices, stacks )
finally:
glPopMatrix()
def coneMaterial( ):
"""Setup material for cone"""
glMaterialfv(GL_FRONT, GL_AMBIENT, [0.2, 0.2, 0.2, 1.0])
glMaterialfv(GL_FRONT, GL_DIFFUSE, [0.8, 0.8, 0.8, 1.0])
glMaterialfv(GL_FRONT, GL_SPECULAR, [1.0, 0.0, 1.0, 1.0])
glMaterialfv(GL_FRONT, GL_SHININESS, 50.0)
def light():
"""Setup light 0 and enable lighting"""
glLightfv(GL_LIGHT0, GL_AMBIENT, [0.0, 1.0, 0.0, 1.0])
glLightfv(GL_LIGHT0, GL_DIFFUSE, [1.0, 1.0, 1.0, 1.0])
glLightfv(GL_LIGHT0, GL_SPECULAR, [1.0, 1.0, 1.0, 1.0])
glLightfv(GL_LIGHT0, GL_POSITION, [1.0, 1.0, 1.0, 0.0]);
glLightModelfv(GL_LIGHT_MODEL_AMBIENT, [0.2, 0.2, 0.2, 1.0])
glEnable(GL_LIGHTING)
glEnable(GL_LIGHT0)
def depth():
"""Setup depth testing"""
glDepthFunc(GL_LESS)
glEnable(GL_DEPTH_TEST)
def display( swap=1, clear=1):
"""Callback function for displaying the scene
This defines a unit-square environment in which to draw,
i.e. width is one drawing unit, as is height
"""
if clear:
glClearColor(0.5, 0.5, 0.5, 0)
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT)
# establish the projection matrix (perspective)
glMatrixMode(GL_PROJECTION)
glLoadIdentity()
x,y,width,height = glGetDoublev(GL_VIEWPORT)
gluPerspective(
45, # field of view in degrees
width/float(height or 1), # aspect ratio
.25, # near clipping plane
200, # far clipping plane
)
# and then the model view matrix
glMatrixMode(GL_MODELVIEW)
glLoadIdentity()
gluLookAt(
0,1,5, # eyepoint
0,0,0, # center-of-view
0,1,0, # up-vector
)
light()
depth()
coneMaterial()
rotation()
drawCone()
if swap:
glutSwapBuffers()
def idle( ):
glutPostRedisplay()
starttime = time.time()
def rotation( period = 10):
"""Do rotation of the scene at given rate"""
angle = (((time.time()-starttime)%period)/period)* 360
glRotate( angle, 0,1,0)
return angle
if __name__ == "__main__":
print """You should see a high-resolution cone rotating slowly."""
import sys
glutInit(sys.argv)
glutInitDisplayMode(GLUT_RGBA | GLUT_DOUBLE | GLUT_DEPTH)
glutCreateWindow('Rotating Cone')
glutDisplayFunc(display)
glutIdleFunc(display)
# note need to do this to properly render faceted geometry
glutMainLoop()
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