DDA.rar_DDA算法_dda源程序

#include <stdio.h> #include <graphics.h> #include <math.h> max(int a,int b) { if(a>b) return a; else return b; } min(int a,int b) { if(a<b) return a; else return b; } void DDA(int xs,int ys,int xe,int ye,int color) { float dx,dy,k,y,x; dx = xe - xs; dy = ye - ys; if(dx == 0) { y = min(ys,ye); x = xs; while(y < max(ys,ye)) { putpixel((int)x,(int)y,color); y = y + 1; delay(1000); } } else { k = dy/dx; if(fabs(k)<=1) { x = min(xs,xe); if(x == xs) y = ys; else y = ye; for(;x < max(xe,xs);x++) { putpixel((int)x,(int)(y+0.5),color); y = y + k; delay(1000); } } else { y = min(ys,ye); if(y == ys) x = xs; else x = xe; for(;y<max(ys,ye);y++) { putpixel((int)(x+0.5),(int)y,color); x = x + 1/k; delay(1000); } } } } main() { int driver = DETECT,graphmode,c; initgraph(&driver,&graphmode,"c:\\TC"); setbkcolor(WHITE); DDA(160,240,480,240,BLUE); DDA(320,80,320,400,BLUE) ; DDA(160,320,480,160,BLUE); DDA(240,80,400,400,BLUE); DDA(240,400,400,80,BLUE); DDA(160,160,480,320,BLUE); getch(); closegraph(); }