多边形点画模式

来源：互联网发布：阿佳妮玛戈皇后知乎编辑：程序博客网时间：2024/04/30 15:56

1、void glPolygonMode(GLenum face, GLenum mode);——face指定多边形哪个面为正面（GL_FRONT_AND_BACK/GL_FRONT/GL_BACK）;mode指定以哪种方式绘制（GL_POINT点/GL_LINE轮廓/GL_FILL填充）

2、void glFrontFace(GLenum mode);——控制正面是如何决定的；mode为GL_CCW(默认)说明逆时针为正；GL_CW说明顺时针为正

3、剔除多边形的面

void glEnable(GL_CULL_FACE);——启用剔除功能

void glCullFace(GL_FRONT/GL_BACK/GL_FRONT_AND_BACK)；——剔除正面、背面、所有面

void glDisable(GL_CULL_FACE);——禁用剔除功能

4、点画多边形

void glEnable(GL_POLYGON_STIPPLE);——启用点画功能

void glPolygonStipple(const GLubyte *mask);——mask是指向点列表的指针，点用0、1组成的16位表示

void glDisable(GL_POLYGON_STIPPLE);

实例：

#include <GL/glut.h>#include <stdlib.h>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);/*  draw one solid, unstippled rectangle,    */    /*  then two stippled rectangles        */   glRectf (25.0, 25.0, 125.0, 125.0);   glEnable (GL_POLYGON_STIPPLE);   glPolygonStipple (fly);   glRectf (125.0, 25.0, 225.0, 125.0);   glPolygonStipple (halftone);   glRectf (225.0, 25.0, 325.0, 125.0);   glDisable (GL_POLYGON_STIPPLE);   glFlush ();}void init (void){   glClearColor (0.0, 0.0, 0.0, 0.0);   glShadeModel (GL_FLAT);    }void reshape (int w, int h){   glViewport (0, 0, (GLsizei) w, (GLsizei) h);   glMatrixMode (GL_PROJECTION);   glLoadIdentity ();   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;  }