程序来自《OpenGL编程指南第七版》
1 #include "stdafx.h" 2 #include <Windows.h>//头文件一定要加上，因为windows版本的gl.h和glu.h文件内部使用的宏是在windows.h中定义的 3 #include <gl/GL.h> 4 #include <gl/GLU.h> 5 #include <gl/glut.h> 6 static GLfloat spin=0.0; 7 int drawOneLine(float x1,float y1,float x2,float y2) 8 { 9 glBegin(GL_LINES); 10 glVertex2f((x1),(y1)); 11 glVertex2f((x2),(y2)); 12 glEnd(); 13 return 0; 14 } 15 16 void init (void) 17 { 18 glClearColor(0.5,0.5,0.5,0.0); 19 glShadeModel(GL_FLAT); 20 } 21 void display(void) 22 { 23 int i; 24 glClear(GL_COLOR_BUFFER_BIT); 25 glColor3f(1.0,1.0,0.0); 26 glEnable(GL_LINE_STIPPLE); 27 glLineStipple(1,0x0101);//注意glLineStipple用法以及每个参数的意义 28 drawOneLine(50.0,125.0,150.0,125.0); 29 glLineStipple(1,0x00FF); 30 drawOneLine(150.0,125.0,250.0,125.0); 31 glLineStipple(1,0x1C47); 32 drawOneLine(250.0,125.0,350.0,125.0); 33 glLineWidth(5.0); 34 glLineStipple(1,0x0101); 35 drawOneLine(50.0,100.0,150.0,100.0); 36 glLineStipple(1,0x00FF); 37 drawOneLine(150.0,100.0,250.0,100.0); 38 glLineStipple(1,0x1C47); 39 drawOneLine(250.0,100.0,350.0,100.0); 40 glLineWidth(1.0); 41 glLineStipple(1,0x1C47); 42 glBegin(GL_LINE_STRIP); 43 for (i=0;i<7;i++) 44 glVertex2f(50.0+((GLfloat)i+50.0),75.0); 45 glEnd(); 46 for (i=0;i<6;i++) 47 drawOneLine(50.0+((GLfloat)i+50.0),50.0,50.0+((GLfloat)(i+1)+50.0),50.0); 48 glLineStipple(5,0x1C47); 49 drawOneLine(50.0,25.0,350.0,25.0); 50 glDisable(GL_LINE_STIPPLE); 51 glFlush(); 52 } 53 54 void reshape(int w,int h) 55 { 56 glViewport(0,0,(GLsizei)w,(GLsizei)h); 57 glMatrixMode(GL_PROJECTION); 58 glLoadIdentity(); 59 gluOrtho2D(0.0,(GLdouble)w,0.0,(GLdouble)h); 60 } 61 62 int main(int argc,char**argv) 63 { 64 glutInit(&argc,argv); 65 glutInitDisplayMode(GLUT_SINGLE|GLUT_RGB); 66 glutInitWindowSize(400,150); 67 glutInitWindowPosition(100,100); 68 glutCreateWindow(argv[0]); 69 init(); 70 glutDisplayFunc(display); 71 glutReshapeFunc(reshape); 72 glutMainLoop(); 73 return 0; 74 }
运行的效果图：
