Draw Hermite Curve

Draw Hermite Curve using C++ with MFC :

Code:

    vector<double> xCof = GetHermiteCoeff(P0.first, T0.first, P3.first, T1.first);
    vector<double> yCof = GetHermiteCoeff(P0.second, T0.second, P3.second, T1.second);

    if(numPix < 2) return;
    double dt = 1.0 / (numPix - 1);

    tagLOGPEN tp;
    tp.lopnColor = color;
    tp.lopnStyle = PS_SOLID;
    tp.lopnWidth.x = 1;
    HPEN p = CreatePenIndirect(&tp);
    SelectObject(hdc, p);
    for(double t = 0; t <= 1; t += dt)
    {
        vector<double> vt(4);
        vt[3] = 1;
        vt[2] = t*vt[3];
        vt[1] = t*vt[2];
        vt[0] = t*vt[1];

        int x = round(DotProduct(xCof,vt));
        int y = round(DotProduct(yCof,vt));


        if(t==0)
            {
            MoveToEx(hdc,x,y,NULL);
            SetPixel(hdc, x, y, color);
            }
        else LineTo(hdc,x,y);
    }
    DeleteObject(p);
 

_________________
M. S. Rakha, Ph.D.
Queen's University
Canada

Author: DrRakha
Mastermind

Posts: 2715
Have thanks: 74 time

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