Ubuntu下利用Python开发Opengl程序

来源：http://www.linuxidc.com/Linux/2013-02/78960.htm

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

h=0
m=0
s=0
def Draw():
    PI=3.1415926 
    R=0.5
    TR=R-0.05
    glClear(GL_COLOR_BUFFER_BIT)
    glLineWidth(5)
    glBegin(GL_LINE_LOOP)
    for i in range(100):
        glVertex2f(R*math.cos(2*PI/100*i),R*math.sin(2*PI/100*i))
    glEnd()
    
    glLineWidth(2)
    for i in range(100):
        glBegin(GL_LINES)  
        glVertex2f(TR*math.sin(2*PI/12*i),TR*math.cos(2*PI/12*i))  
        glVertex2f(R*math.sin(2*PI/12*i),R*math.cos(2*PI/12*i))  
        glEnd()
        
    glLineWidth(1) 
    h_Length=0.2
    m_Length=0.3
    s_Length=0.4
    count=60.0
    s_Angle=s/count
    count*=60
    m_Angle=(m*60+s)/count
    count*=12
    h_Angle=(h*60*60+m*60+s)/count
    glLineWidth(1) 
    glBegin(GL_LINES)
    glVertex2f(0.0,0.0) 
    glVertex2f(s_Length*math.sin(2*PI*s_Angle),s_Length*math.cos(2*PI*s_Angle))
    glEnd()
    glLineWidth(5)
    glBegin(GL_LINES)
    glVertex2f(0.0,0.0)
    glVertex2f(h_Length*math.sin(2*PI*h_Angle),h_Length*math.cos(2*PI*h_Angle))
    glEnd()
    glLineWidth(3)
    glBegin(GL_LINES)
    glVertex2f(0.0,0.0)
    glVertex2f(m_Length*math.sin(2*PI*m_Angle),m_Length*math.cos(2*PI*m_Angle)) 
    glEnd()
    glLineWidth(1)
    glBegin(GL_POLYGON) 
    for i in range(100):
        glVertex2f(0.03*math.cos(2*PI/100*i),0.03*math.sin(2*PI/100*i));  
    glEnd()
    
    glFlush()
    
def Update():
    global h,m,s
    t=time.localtime(time.time())
    h=int(time.strftime('%H',t))
    m=int(time.strftime('%M',t))
    s=int(time.strftime('%S',t))
    glutPostRedisplay()
    
glutInit()
glutInitDisplayMode(GLUT_SINGLE | GLUT_RGBA)
glutInitWindowSize(400, 400)
glutCreateWindow("My clock")
glutDisplayFunc(Draw)
glutIdleFunc(Update)
glutMainLoop()