cjx798280904的专栏

#include #include static int i=1;void Initial(void){ glClearColor(1.0f, 1.0f, 1.0f, 1.0f); //设置窗口背景颜色为白色 glMatrixMode(GL_PROJECTION); //指定设置投影参数 gluOrtho2D(-200.0,200.0,-200.0,200

（百度摘的）安装GLUT工具包GLUT下载地址：（大小约为150k）http://www.opengl.org/resources/libraries/glut/glut_downloads.php/glutdlls37beta.zip Windows环境下安装GLUT的步骤：1、将下载的压缩包解开，将得到5个文件(glut.h  glut.lib glut32.lib 

void DDALine(int x0,int y0,int x1,int y1){ int dx,dy,epsl,k; float x,y,xIncre,yIncre; dx = x1 - x0; dy = y1 - y0; x = x0; y = y0; if(abs(dx)>abs(dy)) epsl=abs(dx); else epsl=abs(dy);

void Mid_B(int x0,int y0,int x1,int y1){ int dx,dy,d,UpIncre,DownIncre,x,y; if(x0 > x1) { x = x1; x1 = x0; x0 = x; y = y1; y1 = y0; y0 = y; } x = x0; y = y0; dx = x1 - x0; dy = y1

gluOrtho2D(-200.0,200.0,-200.0,200.0); //设置投影参数  //指的是视图范围，如果(0,200,0,200)的话就只能在第一象限显示，就1/4圆//第1，3的参数是左下角坐标，第2，4的参数是右上角坐标glViewport(0,0,400,400); //前两个参数改变原点坐标，后两个参数改变图形长宽（放大缩小）

void G_B(int x0,int y0,int x1,int y1){ int x,y,dx,dy,e; dx = x1 - x0; dy = y1 - y0; e =- dx; x=x0; y=y0; glPointSize(2); glBegin(GL_POINTS); while(x <= x1) { glColor3f(1.0f, 0.0f, 0.0f)

void CirclePoint(int x, int y){ glPointSize(2); glBegin(GL_POINTS); glColor3f(1.0f, 0.0f, 0.0f); glVertex2f(x,y); glVertex2f(y,x); glVertex2f(-y,x); glVertex2f(-x,y); glVertex2f(-x,-y);