void DibujarCentro(int x, int y)
{
for (int i = -k; i <= k; i++)
{
for (int j = -k; j <= k; j++)
{
Grafo.SetPixel(x + i, y + j, Rojo);
pictureBox1.Image = Grafo;
}
}
}
List <Point> DDA()
{
double m = ((double)p_f.Y - (double)p_0.Y) / ((double)p_f.X - (double)p_0.X);
double b = (double)p_0.Y - (double)m * (double)p_0.X;
double y_i, x_i;
bool band = false;
bool band2 = false;
int inc = 1;
Point Coordenadas;
List <Point> Linea = new List <Point>();
Coordenadas = new Point();
if (Double.IsInfinity(m))
{
if (p_0.Y > p_f.Y)
{
inc = -1;
}
for (y_i = p_0.Y; (int)y_i != p_f.Y; y_i += inc)
{
x_i = p_0.X;
colorpixel = Picture.GetPixel((int)Math.Round(x_i), (int)y_i);
if (colorpixel == Blanco)
{
band = true;
}
if (colorpixel != Blanco && band == true)
{
band2 = true;
}
if (colorpixel == Blanco && band2 == true)
{
return(null);
}
}
for (y_i = p_0.Y; (int)y_i != p_f.Y; y_i += inc)
{
x_i = p_0.X;
Coordenadas.X = (int)x_i;
Coordenadas.Y = (int)y_i;
Linea.Add(Coordenadas);
Grafo.SetPixel(Coordenadas.X, Coordenadas.Y, Color.Black);
}
return(Linea);
}
if (m <= 1 && m >= -1)
{
if (p_0.X > p_f.X)
{
inc = -1;
}
for (x_i = p_0.X; (int)x_i != p_f.X; x_i += inc)
{
y_i = m * x_i + b;
colorpixel = Picture.GetPixel((int)x_i, (int)Math.Round(y_i));
if (colorpixel == Blanco)
{
band = true;
}
if (colorpixel != Blanco && band == true)
{
band2 = true;
}
if (colorpixel == Blanco && band2 == true)
{
return(null);
}
}
for (x_i = p_0.X; (int)x_i != p_f.X; x_i += inc)
{
y_i = m * x_i + b;
Coordenadas.X = (int)x_i;
Coordenadas.Y = (int)Math.Round(y_i);
Linea.Add(Coordenadas);
Grafo.SetPixel(Coordenadas.X, Coordenadas.Y, Color.Black);
}
return(Linea);
}
else
{
if (p_0.Y > p_f.Y)
{
inc = -1;
}
for (y_i = p_0.Y; (int)y_i != p_f.Y; y_i += inc)
{
x_i = (y_i - b) / m;
colorpixel = Picture.GetPixel((int)Math.Round(x_i), (int)y_i);
if (colorpixel == Blanco)
{
band = true;
}
if (colorpixel != Blanco && band == true)
{
band2 = true;
}
if (colorpixel == Blanco && band2 == true)
{
return(null);
}
}
for (y_i = p_0.Y; (int)y_i != p_f.Y; y_i += inc)
{
x_i = (y_i - b) / m;
Coordenadas.X = (int)Math.Round(x_i);
Coordenadas.Y = (int)y_i;
Linea.Add(Coordenadas);
Grafo.SetPixel(Coordenadas.X, Coordenadas.Y, Color.Black);
}
return(Linea);
}
}
