private void bresenham(double dx, double dy, int x1, int y1, int x2, int y2, Bitmap b)
{
if (dx != 0 && dy != 0)
{
if (Math.Abs(dy) > Math.Abs(dx))
{
if (x1 < x2)
{
if (y1 < y2)
{
FiltroV.BresenhamHigh(x1, y1, b, dx, dy, 1, 1);
}
else
{
dy *= -1;
FiltroV.BresenhamHigh(x1, y1, b, dx, dy, 1, -1);
}
}
else
{
dx *= -1;
if (y1 < y2)
{
FiltroV.BresenhamHigh(x1, y1, b, dx, dy, -1, 1);
}
else
{
dy *= -1;
FiltroV.BresenhamHigh(x1, y1, b, dx, dy, -1, -1);
}
}
}
else
{
if (x1 < x2)
{
if (y1 < y2)
{
FiltroV.BresenhamLow(x1, y1, b, dx, dy, 1, 1);
}
else
{
dy *= -1;
FiltroV.BresenhamLow(x1, y1, b, dx, dy, 1, -1);
}
}
else
{
dx *= -1;
if (y1 < y2)
{
FiltroV.BresenhamLow(x1, y1, b, dx, dy, -1, 1);
}
else
{
dy *= -1;
FiltroV.BresenhamLow(x1, y1, b, dx, dy, -1, -1);
}
}
}
pbviewport.Image = b;
}
}
private void pbsegmentos_MouseMove(object sender, MouseEventArgs e)
{
x2 = e.X;
y2 = e.Y;
b = (Bitmap)aux.Clone();
double dx = x2 - x1;
double dy = y2 - y1;
if (x1 != 0 && y1 != 0 && modoseg.Equals("po"))
{
bresenham(dx, dy, b);
}
else if (mstatus)
{
switch (modoseg)
{
case "er":
if (dx != 0)
{
double m = dy / dx;
if (x1 < x2)
{
FiltroV.EqGeralRetaQ1(m, x1, y1, dx, b, 1);
}
else
{
dx *= -1;
FiltroV.EqGeralRetaQ1(m, x1, y1, dx, b, -1);
}
if (y1 < y2)
{
FiltroV.EqGeralRetaQ2(m, x1, y1, dy, b, 1);
}
else
{
dy *= -1;
FiltroV.EqGeralRetaQ2(m, x1, y1, dy, b, -1);
}
pbsegmentos.Image = b;
}
break;
case "dr":
if (dx != 0)
{
if (x1 > x2)
{
FiltroM.retaDda(b, x2, x1, y2, y1, Color.Black);
}
else
{
FiltroM.retaDda(b, x1, x2, y1, y2, Color.Black);
}
pbsegmentos.Image = b;
}
break;
case "br":
bresenham(dx, dy, b);
break;
case "ec":
FiltroC.EqGeralCircunferencia(x1, y1, x2, y2, b);
pbsegmentos.Image = b;
break;
case "tr":
FiltroM.circTrigonometria(x1, y1, x2, y2, b);
pbsegmentos.Image = b;
break;
case "pm":
FiltroM.circPontomedio(x1, y1, x2, y2, b);
pbsegmentos.Image = b;
break;
case "el":
FiltroM.elipse(Math.Abs(x2 - x1), Math.Abs(y2 - y1), x1, y1, b);
pbsegmentos.Image = b;
break;
}
}
}