计算机图形学--实验环境的熟悉及像素点的生成.doc

实验一 实验环境的熟悉及像素点的生成班级 08信计（2）班 学号 20080502085 姓名 王景超 分数一、实验目的和要求：1、了解和使用TurboC提供的基本图形函数2、利用TurboC 2.0作为开发工具进行图形编程3、在屏幕上生成任意一个像素点.二、实验内容：1.了解和使用TC 2.0的开发环境。2.熟悉TC 2.0开发环境的基本编辑命令及功能健，学会常规操作。3.理解简单的TC 2.0程序结构，学习完整的TC程序开发过程。4.了解和使用TC 2.0提供的基本图形函数，包括像素点的生成。三、实验结果分析1.案例二结果分析（1）该图案是由直线图形组成，这些直线的起点和终点均是一个圆的内接正n多边形的顶点程序代码如下：绘制整个图案的过程是一个二重循环，设各顶点的坐标为xk,yk,k=0,1,n-1,则绘制过程为：#include graphics.h#include math.h#define X 0#define Y 1#define Z 2typedef float point3;int x=0,y=0;void display(point * P,int n,int color)float C34,t,deltat; point point1,point2; int i,j; setcolor(color); for(j=0;j3;j+) Cj0=P0j; Cj1=-3*P0j+3*P1j; Cj2=3*P0j-6*P1j+3*P2j; Cj3=-P0j+3*P1j-3*P2j+P3j; /*Cj0=P0j-3*P1j+3*P2j-P3j; Cj1=-3*P1j-6*P2j+3*P3j; Cj2=3*P2j-3*P3j; Cj3=P3j; */ point1X=P0X;point1Y=P0Y;point1Z=P0Z; deltat=1.0/n; t=0.0; for(i=1;i=n;i+) t+=deltat; point2X=CX0+t*(CX1+t*(CX2+t*CX3); point2Y=CY0+t*(CY1+t*(CY2+t*CY3); point2Z=CZ0+t*(CZ1+t*(CZ2+t*CZ3); line(point10,point11, point20,point21); point1X=point2X;point1Y=point2Y; point1Z=point2Z; void zhongxing(int x,int y,int s) int i; for(i=x-5;i=x+5;i+) putpixel(i,y,s); for(i=y-5;i=y+5;i+) putpixel(x,i,s); void kongdian(point * pot,int color) int i; setcolor(color); for(i=0;i4;i+) circle(potiX,potiY,3); void shuchu(char * s,int color) setcolor(color); outtextxy(0,0,s);void main()int driver=DETECT,mode; int i=0,j,key,s=1;point pot4=100,200,0,200,250,0,300,200,0,400,250,0; char s1=PLEASE CHOOSE THE CONTROL POINT,s2=PLEASE MOVE THE CONTROL POINT,s3=ESC BE PRESSED; registerbgidriver(EGAVGA_driver); initgraph(&driver,&mode,tc);shuchu(s1,14);kongdian(pot,5);display(pot,50,4);zhongxing(potiX,potiY,2);for(;) if(bioskey(1) key=bioskey(0); if(key=0x4d00) if(s=1) if(i!=3) zhongxing(potiX,potiY,0); i+=1; zhongxing(potiX,potiY,2); if(s=-1) display(pot,50,0);kongdian(pot,0);zhongxing(potiX,potiY,0); potiX+=1; display(pot,50,4);kongdian(pot,5);zhongxing(potiX,potiY,2); if(key=0x011b) outtextxy(0,20,s3); break; if(key=0x4b00) if(s=1) if(i!=0) zhongxing(potiX,potiY,0); i-=1; zhongxing(potiX,potiY,2); if(s=-1) display(pot,50,0);kongdian(pot,0);zhongxing(potiX,potiY,0); potiX-=1; display(pot,50,4);kongdian(pot,5);zhongxing(potiX,potiY,2); if(key=0x5000) if(s=-1) display(pot,50,0);kongdian(pot,0);zhongxing(potiX,potiY,0); potiY+=1; display(pot,50,4);kongdian(pot,5);zhongxing(potiX,potiY,2); if(key=0x4800) if(s=-1) display(pot,50,0);kongdian(pot,0);zhongxing(potiX,potiY,0); potiY-=1; display(pot,50,4);kongdian(pot,5);zhongxing(potiX,p