用matlab编程 计算机图形作业

function DDA(x1,y1,x2,y2,color)length =abs(x2-x1);if abs(y2-y1)>lengthlength=abs(y2-y1);enddx=(x2-x1)/length;dy=(y2-y1)/length;x=x1+0。5*sign(dx);y=y1+0。5*sign(dy);hold onfor i=1:lengthplot(round(x),round(y),'Color',color)x=x+dx;y=y+dy;endhold offend