public static Bitmap Bresenham(Bitmap img, int x1, int y1, int x2, int y2, Color cor)
{
Bitmap btm = new Bitmap(img);
int declive;
int dx, dy, incE, incNE, d, x, y;
dx = x2 - x1;
dy = y2 - y1;
if (Math.Abs(dx) > Math.Abs(dy))
{
if (x1 > x2)
{
btm = DrawLine.Bresenham(btm, x2, y2, x1, y1, cor);
}
else
{
if (dy < 0)
{
declive = -1;
dy = -dy;
}
else
{
declive = 1;
}
incE = 2 * dy;
incNE = 2 * dy - 2 * dx;
d = 2 * dy - dx;
y = y1;
for (x = x1; x <= x2; x++)
{
Paint.Draw(btm, x, y, cor);
if (d <= 0)
{
d += incE;
}
else
{
d += incNE;
y += declive;
}
}
}
}
else
{
if (y1 > y2)
{
btm = DrawLine.Bresenham(btm, x2, y2, x1, y1, cor);
}
else
{
if (dx < 0)
{
declive = -1;
dx = -dx;
}
else
{
declive = 1;
}
incE = 2 * dx;
incNE = 2 * dx - 2 * dy;
d = 2 * dx - dy;
x = x1;
for (y = y1; y <= y2; y++)
{
Paint.Draw(btm, x, y, cor);
if (d <= 0)
{
d += incE;
}
else
{
d += incNE;
x += declive;
}
}
}
}
return(btm);
}