-(void) drawQuad
{
	glBegin(GL_QUADS);
		glTexCoord2f(0.0f, 0.0f); glVertex2f(-1.0f,-1.0f);
		glTexCoord2f(0.0f, 0.0f); glVertex2f( 1.0f,-1.0f);
		glTexCoord2f(1.0f, 1.0f); glVertex2f( 1.0f, 1.0f);
		glTexCoord2f(0.0f, 1.0f); glVertex2f(-1.0f, 1.0f);
	glEnd();
}