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()