1.点画多边形

//定义填充多边形的点画模式。mask为32 x 32 的位图指针，1画0不画，使用前必须启用多边形点画功能void glPloygonStipple(const GLubyte* mask);//绘制一个矩形void glRectf(GLfloat x1,GLfloat y1,GLfloat x2,GLfloat y2);

2.示例

#include 
    
     #include 
     
      void display(void){	GLubyte fly[] = {		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,		0x03, 0x80, 0x01, 0xC0, 0x06, 0xC0, 0x03, 0x60, 		0x04, 0x60, 0x06, 0x20, 0x04, 0x30, 0x0C, 0x20, 		0x04, 0x18, 0x18, 0x20, 0x04, 0x0C, 0x30, 0x20,		0x04, 0x06, 0x60, 0x20, 0x44, 0x03, 0xC0, 0x22, 		0x44, 0x01, 0x80, 0x22, 0x44, 0x01, 0x80, 0x22, 		0x44, 0x01, 0x80, 0x22, 0x44, 0x01, 0x80, 0x22,		0x44, 0x01, 0x80, 0x22, 0x44, 0x01, 0x80, 0x22, 		0x66, 0x01, 0x80, 0x66, 0x33, 0x01, 0x80, 0xCC, 		0x19, 0x81, 0x81, 0x98, 0x0C, 0xC1, 0x83, 0x30,		0x07, 0xe1, 0x87, 0xe0, 0x03, 0x3f, 0xfc, 0xc0, 		0x03, 0x31, 0x8c, 0xc0, 0x03, 0x33, 0xcc, 0xc0, 		0x06, 0x64, 0x26, 0x60, 0x0c, 0xcc, 0x33, 0x30,		0x18, 0xcc, 0x33, 0x18, 0x10, 0xc4, 0x23, 0x08, 		0x10, 0x63, 0xC6, 0x08, 0x10, 0x30, 0x0c, 0x08, 		0x10, 0x18, 0x18, 0x08, 0x10, 0x00, 0x00, 0x08};	GLubyte halftone[] = {		0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55, 		0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55, 		0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55,		0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55, 		0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55, 		0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55,		0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55, 		0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55, 		0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55,		0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55, 		0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55, 		0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55,		0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55, 		0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55, 		0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55,		0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55};	glClear (GL_COLOR_BUFFER_BIT);	glColor3f (1.0, 1.0, 1.0);//白色	//矩形1	glRectf (25.0, 25.0, 125.0, 125.0);	//绘制矩形	//矩形2	glEnable (GL_POLYGON_STIPPLE);		//开启多边形点画功能	glPolygonStipple (fly);				//定义点画模式填充内容	glRectf (125.0, 25.0, 225.0, 125.0);//绘制矩形		//矩形3	glPolygonStipple (halftone);	glRectf (225.0, 25.0, 325.0, 125.0);	glDisable (GL_POLYGON_STIPPLE);		//关闭多边形点画功能	glFlush ();}void init (void) {	glClearColor (0.0, 0.0, 0.0, 0.0);	glShadeModel (GL_FLAT);    //采用恒定着色模式，使用图元中某个顶点的颜色来渲染整个图元。  }void reshape (int w, int h){	glViewport (0, 0, (GLsizei) w, (GLsizei) h);	glMatrixMode (GL_PROJECTION);	 //将当前矩阵指定为投影矩阵  	glLoadIdentity ();				 //把当前矩阵设为单位矩阵  	gluOrtho2D (0.0, (GLdouble) w, 0.0, (GLdouble) h);}void keyboard(unsigned char key, int x, int y){	switch (key) {	case 27:		exit(0);		break;	}}int main(int argc, char** argv){	glutInit(&argc, argv);	glutInitDisplayMode (GLUT_SINGLE | GLUT_RGB);	glutInitWindowSize (350, 150);	glutCreateWindow (argv[0]);	init ();	glutDisplayFunc(display);	glutReshapeFunc(reshape);	glutKeyboardFunc (keyboard);	glutMainLoop();	return 0;  }
     
    

3.效果图