// 范例P195.cpp : Defines the entry point for the console application.// #include "stdafx.h"#include "string.h"#include <gl/glut.h> #define PT 1          //一点#define STROKE 2         //一画#define END 3          //结束 // 字体结构体typedef struct charpoint{ GLfloat x,y; int type;}CP; //具体字体描述笔画 CP Adata[]={ {0,0,PT},{0,9,PT},{1,10,PT},{4,10,PT},{5,9,PT}, {5,0,STROKE},{0,5,PT},{5,5,END}}; CP Cdata[]={ {5,0,PT},{1,0,PT},{0,1,PT},{0,9,PT},{1,10,PT},{5,10,END}}; CP Ddata[]={ {0,0,PT},{0,10,PT},{3,10,PT},{4,8,PT},{4,2,PT},{3,0,PT},{0,0,END}}; CP Edata[]={ {5,0,PT},{0,0,PT},{0,10,PT},{5,10,STROKE}, {0,5,PT},{4,5,END}}; CP Pdata[]={ {0,0,PT},{0,10,PT},{4,10,PT},{5,9,PT},{5,6,PT}, {4,5,PT},{0,5,END}}; CP Rdata[]={ {0,0,PT},{0,10,PT},{4,10,PT},{5,9,PT},{5,6,PT}, {4,5,PT},{0,5,STROKE},{3,5,PT},{5,0,END}}; CP Sdata[]={ {0,1,PT},{1,0,PT},{4,0,PT},{5,1,PT},{5,4,PT}, {4,5,PT},{1,5,PT},{0,6,PT},{0,9,PT},{1,10,PT}, {4,10,PT},{5,9,END}}; static void drawletter(CP *l){ glBegin(GL_LINE_STRIP); while(l){  switch(l->type){  case PT:   glVertex2f(l->x,l->y);   break;  case STROKE:   //结束一画，开始新的一画   glVertex2f(l->x,l->y);   glEnd();   glBegin(GL_LINE_STRIP);   break;  case END:   //结束一个字母，开始绘制另一个中间有间隔的字母   glVertex2f(l->x,l->y);   glEnd();   glTranslatef(8.0,0.0,0.0);   return;  }  l++; }} static void init (){ GLuint base; glShadeModel(GL_FLAT);  base=glGenLists(128); glListBase(base); glNewList(base+'A',GL_COMPILE);drawletter(Adata);glEndList(); glNewList(base+'C',GL_COMPILE);drawletter(Cdata);glEndList(); glNewList(base+'D',GL_COMPILE);drawletter(Ddata);glEndList(); glNewList(base+'E',GL_COMPILE);drawletter(Edata);glEndList(); glNewList(base+'P',GL_COMPILE);drawletter(Pdata);glEndList(); glNewList(base+'R',GL_COMPILE);drawletter(Rdata);glEndList(); glNewList(base+'S',GL_COMPILE);drawletter(Sdata);glEndList(); glNewList(base+' ',GL_COMPILE);glTranslatef(8,0,0);glEndList();} char *test1="A CPARE DERAPE APPEASS AS";char *test2="APES PREPARE RARE PEPPERS"; static void printStrokedString(char *s){ GLsizei len=strlen(s); glCallLists(len,GL_BYTE,(GLbyte*)s);} void display(){ glClear(GL_COLOR_BUFFER_BIT);     //清除所有像素 glColor3f(1.0,1.0,1.0);       //设置画笔白色 /*在缓存中绘制4对顶点坐标的矩形*/  glPushMatrix(); glScalef(2.0,2.0,2.0); glTranslatef(10,30,0); printStrokedString(test1); glPopMatrix();  glPushMatrix(); //glScalef(2.0,2.0,2.0); glTranslatef(10,13,0); printStrokedString(test2); glPopMatrix();  glFlush();          //立即显示出来} void reshape(int w,int h){ glViewport(0,0,(GLsizei)w,(GLsizei)h); glMatrixMode(GL_PROJECTION); glLoadIdentity(); gluOrtho2D(0,w,0,h);} int main(int argc,char ** argv){ glutInit(&argc,argv); glutInitDisplayMode(GLUT_SINGLE|GLUT_RGB); glutInitWindowSize(440,120);     //初始化窗口大小 glutInitWindowPosition(0,0);     //初始化窗口位置 glutCreateWindow("hello");      //创建标题为“hello”的窗口 init();           //调用初始化函数 glutDisplayFunc(display);      //注册回调函数 glutReshapeFunc(reshape); glutMainLoop();         //进入主循环处理事件 return 0;}  

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