void MGImage::DrawLine ( UChar_t *  buf, int  w, int  h, Float_t  x1, Float_t  y1, Float_t  x2, Float_t  y2, UChar_t  col, Int_t  style = 1  )

static

Definition at line 279 of file MGImage.cc.

References i.

Referenced by DisableSyncMode(), DrawBox(), DrawCross(), DrawHexagon(), and DrawMultiply().

{
    const Int_t    step = style==kSolid?1:3;
    const Double_t len  = TMath::Hypot(x2-x1, y2-y1);
    const Double_t dx   = (x2-x1)/len*step;
    const Double_t dy   = (y2-y1)/len*step;

    Double_t x = x1;
    Double_t y = y1;

    for (int i=0; i<len; i+=step)
    {
        x+= dx;
        y+= dy;

        const Int_t iy = TMath::Nint(y);
        if (iy<0 || iy>=h)
            continue;

        const Int_t ix = TMath::Nint(x);
        if (ix<0 || ix>=w)
            continue;

        buf[ix+iy*w] = col;
    }
}

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