pyglet and opengl -- 纹理映射以及动画

 #-*- coding:gbk -*-
 #from pyglet.gl import *
 from OpenGL.GL import *
 import pyglet
 from pyglet import clock
 from PIL import Image
 from ctypes import *

 def draw_rect(x, y,z,width, height,ang):
     """
     实际矩形代码
     """
     glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT)
     glPushMatrix()
     glLoadIdentity()
     glTranslatef(x+width/2,y+height/2,0.0)
     glRotatef(ang,0.0,1.0,0.0)
     glBegin(GL_QUADS)
     glTexCoord2f(0.0,0.0)  #纹理坐标
     glVertex3f(x-width/2, y-height/2,z)
     glTexCoord2f(1.0,0.0)
     glVertex3f(x + width/2, y-height/2,z)
     glTexCoord2f(1.0,1.0)
     glVertex3f(x + width/2, y + height/2,z)
     glTexCoord2f(0.0,1.0)
     glVertex3f(x-width/2, y + height/2,z)
     glEnd()
     glPopMatrix()

 class Button():
     x=y=z=0
     width=height=10.0
     ang=0
     TEXTUREWIDTH=100
     TEXTUREHEIGHT=100
     image_data=[] #保存纹理数据
     def draw(self):
         """
         画矩形
         """
         draw_rect(self.x,self.y,self.z,self.width,self.height,self.ang)

     def loadTexture(self):
         """
         载入纹理
         """
         #创建纹理对象
         texid=glGenTextures(1)        #绑定纹理
         glBindTexture(GL_TEXTURE_2D,texid)
         glPixelStorei(GL_UNPACK_ALIGNMENT,1)
         #开启纹理功能
         glEnable(GL_TEXTURE_2D)
         #说明映射方式
         glTexEnvf(GL_TEXTURE_ENV,GL_TEXTURE_ENV_MODE,GL_DECAL)
         #设置滤波方式
         glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_NEAREST)
         glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_NEAREST)
         #纹理图
         glTexImage2D(GL_TEXTURE_2D,0,3,self.TEXTUREWIDTH,self.TEXTUREHEIGHT,0,GL_RGBA,GL_UNSIGNED_BYTE,self.image_data)

     def load_image(self,imagePath):
         """
         读取图像的数据
         """
         imageData=Image.open(imagePath)
         try:
             imageData=imageData.convert('RGB')
             self.TEXTUREWIDTH,self.TEXTUREHEIGHT,self.image_data=imageData.size[0],imageData.size[1],imageData.tostring('raw','RGBA',0,-1)
         except SystemError:
             self.TEXTUREWIDTH,self.TEXTUREHEIGHT,self.image_data=imageData.size[0],imageData.size[1],imageData.tostring('raw','RGBX',0,-1)
         assert self.TEXTUREWIDTH*self.TEXTUREHEIGHT*4 == len(self.image_data)

 class MyWindow(pyglet.window.Window):
     def __init__(self):
         super(MyWindow,self).__init__()
         #按钮
         self.button=Button()
         self.button.x=10
         self.button.y=10
         self.button.z=0
         self.button.width=self.width/2
         self.button.height=self.height/2
         self.button.ang=0

         #所有要画的图元
         self.need_draw=[
                 self.button,
                             ]
     def on_draw(self):
         """
         画图，刷新
         """
         self.clear()
         for draw_object in self.need_draw:
             draw_object.draw()
     def value_change(self,dt):
         self.button.x+=10.0

 if __name__ == "__main__":
     wn=MyWindow()
     wn.button.load_image('tex.jpg')
     wn.button.loadTexture()
     clock.schedule_interval(wn.value_change,0.5)
 pyglet.app.run()