计算机图形学中关于画图的代码总结

    ///DDA画直线
    #include <cstdio>
    using namespace std;
    void Line(int x1, int y1, int x2, int y2, int color)
    {
    CDC *pDC = GetDC();///获取图形设备环境
    float t, x, y, step;
    step = 1.0/(sqrt((x2-x1)*(x2-x1)+(y2-y1)*(y2-y1)));
    for(t=0.0; t<=1.0; t=t+step)
    {
        x = x1 + t*(x2-x1);
        y = y1 + t*(y2-y1);
        pDC->SetPixel(x,y, color);
    }
    }
    
    void DDA(int x1,int y1,int x2,int y2,int color)
    {
    CDC *pDC=GetDC();
    float t,x,y,step;
    step=1.0/((x2-x1)*(x2-x1)+(y2-y1)*(y2-y1));
    for(t=0.0; t<=1.0; t+=step)
    {
        x=x1+t*(x2-x1