圖形學上機實驗報告專業：08計科一班姓名：李旺龍學號：080104011110指導老師：楊楊薇薇完成日期：2010年11月19日

DDA畫線算法//DDA.c#include<stdio.h>#include<graphics.h>voidDDALine(intx0,inty0,intx1,inty1,intcolor){ intx; floatdx,dy,y,k; dx=x1-x0; dy=y1-y0; k=dy/dx; y=y0; for(x=x0;x<=x1;x++) { putpixel(x,(int)(y+0.5),color); y=y+k; }}voidmain(){ intgdriver,gmode; gdriver=DETECT; initgraph(&gdriver,&gmode,""); clrscr(); setbkcolor(4); DDALine(20,20,600,100,5); getchar(); closegraph();}

中點畫線算法//MIdpointline.c#include<stdio.h>#include<graphics.h>voidMidpointLine(intx0,inty0,intx1,inty1,intcolor){ inta,b,d1,d2,d,x,y; a=y0-y1; b=x1-x0; d=2*a+b; d1=2*a; d2=2*(a+b); x=x0; y=y0; putpixel(x,y,color); while(x<x1) { if(d<0) { y++; d+=d2; } else { d+=d1; } x++; putpixel(x,y,color); }}voidmain(){ intgdriver,gmode; gdriver=DETECT; initgraph(&gdriver,&gmode,""); setbkcolor(9); MidpointLine(50,10,300,250,5); getchar(); closegraph();}

Bresenham畫線算法//Bresenham.c#include<stdio.h>#include<graphics.h>voidInterBresenhamline(intx0,inty0,intx1,inty1,intcolor){ intdx,dy,x,y,e,i; dx=x1-x0; dy=y1-y0; e=-dx; x=x0; y=y0; for(i=0;i<=dx;i++) { putpixel(x,y,color); x++; e=e+2*dy; if(e>=0) { y++; e=e-2*dx; } }}voidmain(){ intgdriver,gmode; gdriver=DETECT; initgraph(&gdriver,&gmode,""); clrscr(); setbkcolor(9); InterBresenhamline(20,20,300,300,5); getchar(); closegraph();}voidmain(){ intgdriver,gmode;voidmain(){ intgdriver,gmode; gdriver=DETECT; initgraph(&gdriver,&gmode,""); clrscr(); setbkcolor(9); IntMidPointCircle(20,5); getchar(); closegraph();}中點畫圓算法//Midpointcircl.c#include<stdio.h>#include<graphics.h>voidCirclePoints(intx,inty,intcolor){ putpixel(x+200,y+200,color); putpixel(y+200,x+200,color); putpixel(-x+200,y+200,color); putpixel(y+200,-x+200,color); putpixel(x+200,-y+200,color); putpixel(-y+200,x+200,color); putpixel(-x+200,-y+200,color); putpixel(-y+200,-x+200,color);}voidIntMidPointCircle(intr,intcolor){ intx,y,d; x=0; y=r; d=1-r; CirclePoints(x,y,color); while(x<=y) { if(d<0) { d+=2*x+3; } else { d+=2*(x-y)+5; y--; } x++; CirclePoints(x,y,color); }}voidmain(){voidmain(){ intgdriver,gmode; gdriver=DETECT; initgraph(&gdriver,&gmode,""); clrscr(); setbkcolor(9); IntMidPointCircle(20,5); getchar(); closegraph();}Bresenham畫圓算法//BresenhamCircle.c#include<stdio.h>#include<graphics.h>voidCirclePoints(intx,inty,intcolor){ putpixel(x+200,y+200,color); putpixel(y+200,x+200,color); putpixel(-x+200,y+200,color); putpixel(y+200,-x+200,color); putpixel(x+200,-y+200,color); putpixel(-y+200,x+200,color); putpixel(-x+200,-y+200,color); putpixel(-y+200,-x+200,color);}voidBresenhamCircle(intr,intcolor){ intx,y,d; x=0; y=r; d=3-2*r; while(x<y) { CirclePoints(x,y,color); if(d<0) { d+=4*x+6; } else { d+=4*(x-y)+10; y--; } x++; } if(x==y) { CirclePoints(x,y,color); }}

voidMidpointLine(intx0,inty0,intx1,inty1,intcolor){voidMidpointLine(intx0,inty0,intx1,inty1,intcolor){ inta,b,d1,d2,d,x,y; a=y0-y1; b=x1-x0; d=2*a+b; d1=2*a; d2=2*(a+b); x=x0; y=y0; putpixel(x,y,color); while(x<x1) { if(d<0) { y++; d+=d2; } else { d+=d1; } x++; putpixel(x,y,color); }}voidLine(intx,inty1,inty2,intcolor){inti; for(i=y1;i<=y2;i++) { putpixel(x,i,color); }} #include<stdio.h>#include<graphics.h>voidCirclePoints(intx,inty,intcolor,intsx,intsy){ putpixel(x+sx,y+sy,color); putpixel(y+sx,x+sy,color); putpixel(-x+sx,y+sy,color); putpixel(y+sx,-x+sy,color); putpixel(x+sx,-y+sy,color); putpixel(-y+sx,x+sy,color); putpixel(-x+sx,-y+sy,color); putpixel(-y+sx,-x+sy,color);}voidIntMidPointCircle(intr,intcolor,intsx,intsy){ intx,y,d; x=0; y=r; d=1-r; CirclePoints(x,y,color,sx,sy); while(x<=y) { if(d<0) { d+=2*x+3; } else { d+=2*(x-y)+5; y--; } x++; CirclePoints(x,y,color,sx,sy); }} 動畫設計：我設計的動畫程序是有兩個小球在一個矩形內運動，當碰到矩形的邊框的時候會反彈，運動一定的時間后停止voidmain()voidmain(){ intgdriver,gmode,sx1=400,sy1=120,sx2=100,sy2=100,i,j,dx1=-20,dy1=-10,dx2=15,dy2=20; longintn=0; gdriver=DETECT; initgraph(&gdriver,&gmode,""); clrscr(); setbkcolor(9); while(n<100) { clrscr(); //畫矩形 MidpointLine(50,10,550,10,5); MidpointLine(50,350,550,350,5); Line(50,10,350,5); Line(550,10,350,5); //畫圓IntMidPointCircle(10,10,sx1,sy1);IntMidPointCircle(5,4,sx2,sy2);//延時 for(i=0;i<10000;i++) { for(j=0;j<7000;j++) { } }//判斷是否到達邊界，到達邊界移動方//向反向 if(sx1>530||sx1<70) { dx1=-dx1; } sx1=sx1+dx1; if(sy1>330||sy1<30) { dy1=-dy1; } sy1=sy1+dy1;if(sx2>530||sx2<70) { dx2=-dx2; } sx2=sx2+dx2; if(sy2>330||sy2<30) { dy2=-dy2; } sy2=sy2+dy2; n++; } getchar(); closegraph();}

實驗心得：經過本次圖形學上機實驗，我對各種畫