DDA Line Drawing Algorithm

Sat Jul 21, 2012 12:08 am

DDA Line Drawing Algorithm implementation on MFC,

Code:: void DrawByDDA(HDC hdc,int xs,int ys,int xe,int ye,COLORREF color) { int dx=xe-xs; int dy=ye-ys; SetPixel(hdc,xs,ys,color); if(abs(dx)>=abs(dy)) { int x=xs,xinc= dx>0?1:-1; double y=ys,yinc=(double)dy/dx*xinc; while(x!=xe) { x+=xinc; y+=yinc; SetPixel(hdc,x,round(y),color); } } else { int y=ys,yinc= dy>0?1:-1; double x=xs,xinc=(double)dx/dy*yinc; while(y!=ye) { x+=xinc; y+=yinc; SetPixel(hdc,round(x),y,color); } } }