计算机图形学——扫描圆

来源：互联网发布：sai mac破解版编辑：程序博客网时间：2024/05/21 16:22

要求：

利用中点Bresenham算法扫描转换圆心在原点, 半径为8的圆

#include <iostream>#include "stdio.h"#include <stdlib.h>#include <cmath>#include <gl/glut.h>using namespace std;void CirclePoint(int x,int y){  glColor3f(0.0f,1.0f,0.0f);     glPointSize(2.0f);     glBegin(GL_POINTS);     glVertex2i(x+80,y+80);glVertex2i(y+80,x+80);     glVertex2i(-y+80,x+80); glVertex2i(-x+80,y+80);     glVertex2i(-x+80,-y+80); glVertex2i(-y+80,-x+80);     glVertex2i(y+80,-x+80); glVertex2i(x+80,-y+80);     glEnd();     glFlush();}void MidBresenhamCircle(int r){ int x,y,d; x=0;y=r;d=1-r; while(x<=y){      CirclePoint(x,y);   if(d<0)d+=2*x+3;   else{   d+=2*(x-y)+5;   y--;   }   x++; }}void Init(void){ glClearColor(1.0f,1.0f,1.0f,0.0f); glMatrixMode(GL_PROJECTION); gluOrtho2D(0.0,200.0,0.0,150.0);}void Display(void){ glClear(GL_COLOR_BUFFER_BIT);    MidBresenhamCircle(8);}int main(int argc,char* argv[]){ glutInit(&argc,argv); glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB); glutInitWindowSize(400,300); glutInitWindowPosition(100,100); glutCreateWindow("Circle"); Init(); glutDisplayFunc(Display);  glutMainLoop(); return 0;}

阅读全文

0 0