def DrawOnTexture(self, CSIZE, px, py, pz, r):
glColor3f(ShadowMap.myrand(), ShadowMap.myrand(), ShadowMap.myrand())
h = 0.0
Xm = -1.0-1.0/CSIZE
Xp = 1.0+1.0/CSIZE
Ym=Xm
Yp=Xp
glew.glMultiTexCoord4fARB(glew.GL_TEXTURE1_ARB, px,py,pz,r)
glTexCoord2f(Xm,Ym); glVertex2f(-h+self.tx, -h+self.ty)
glTexCoord2f(Xp,Ym); glVertex2f(-h+self.tx+CSIZE,-h+self.ty)
glTexCoord2f(Xp,Yp); glVertex2f(-h+self.tx+CSIZE,-h+self.ty+CSIZE)
glTexCoord2f(Xm,Yp); glVertex2f(-h+self.tx, -h+self.ty+CSIZE)
