public static Bitmap RealLine(Bitmap img, int x1, int y1, int x2, int y2, Color cor)
{
Bitmap btm = new Bitmap(img);
double dx = x2 - x1;
double dy = y2 - y1;
double m = (double)dy / dx;
int inc;
if (Math.Abs(dx) > Math.Abs(dy))
{
inc = Math.Sign(dx);
for (int x = x1; x != x2; x += inc)
{
double y = y1 + m * (x - x1);
Paint.Draw(btm, x, (int)Math.Round(y), cor);
}
}
else
{
inc = Math.Sign(dy);
for (int y = y1; y != y2; y += inc)
{
double x = x1 + (y - y1) / m;
Paint.Draw(btm, (int)Math.Round(x), y, cor);
}
}
return(btm);
}
public static Bitmap Draw(Bitmap img, int x, int y, int cx, int cy, Color cor)
{
if (x + cx > 0 && x + cx < img.Width && y + cy > 0 && y + cy < img.Height)
{
Paint.Draw(img, x + cx, y + cy, cor);
}
if (NEG(x) + cx > 0 && NEG(x) + cx < img.Width && y + cy > 0 && y + cy < img.Height)
{
Paint.Draw(img, NEG(x) + cx, y + cy, cor);
}
if (x + cx > 0 && x + cx < img.Width && NEG(y) + cy > 0 && NEG(y) + cy < img.Height)
{
Paint.Draw(img, x + cx, NEG(y) + cy, cor);
}
if (NEG(x) + cx > 0 && NEG(x) + cx < img.Width && NEG(y) + cy > 0 && NEG(y) + cy < img.Height)
{
Paint.Draw(img, NEG(x) + cx, NEG(y) + cy, cor);
}
return(img);
}
public static Bitmap DDA(Bitmap img, int x1, int y1, int x2, int y2, Color cor)
{
Bitmap btm = new Bitmap(img);
int lenght = Math.Abs(x2 - x1);
if (Math.Abs(y2 - y1) > lenght)
{
lenght = Math.Abs(y2 - y1);
}
double X_INC = (double)(x2 - x1) / lenght;
double Y_INC = (double)(y2 - y1) / lenght;
double x = x1;
double y = y1;
int cont = 0;
while (cont < lenght)
{
btm = Paint.Draw(btm, (int)Math.Round(x), (int)Math.Round(y), cor);
x += X_INC;
y += Y_INC;
cont++;
}
return(btm);
}
public static Bitmap Draw(Bitmap img, int x, int y, int cx, int cy, Color cor)
{
if (x + cx >= 0 && x + cx < img.Width && y + cy >= 0 && y + cy < img.Height)
{
img = Paint.Draw(img, x + cx, y + cy, cor); // (x, y)
}
if (y + cx >= 0 && y + cx < img.Width && x + cy >= 0 && x + cy < img.Height)
{
img = Paint.Draw(img, y + cx, x + cy, cor); // (y, x)
}
if (NEG(x) + cx >= 0 && NEG(x) + cx < img.Width && y + cy >= 0 && y + cy < img.Height)
{
img = Paint.Draw(img, NEG(x) + cx, y + cy, cor); // (-x, y)
}
if (NEG(y) + cx >= 0 && NEG(y) + cx < img.Width && x + cy >= 0 && x + cy < img.Height)
{
img = Paint.Draw(img, NEG(y) + cx, x + cy, cor); // (-y, x)
}
if (x + cx >= 0 && x + cx < img.Width && NEG(y) + cy >= 0 && NEG(y) + cy < img.Height)
{
img = Paint.Draw(img, x + cx, NEG(y) + cy, cor); // (x, -y)
}
if (y + cx >= 0 && y + cx < img.Width && NEG(x) + cy >= 0 && NEG(x) + cy < img.Height)
{
img = Paint.Draw(img, y + cx, NEG(x) + cy, cor); // (y, -x)
}
if (NEG(x) + cx >= 0 && NEG(x) + cx < img.Width && NEG(y) + cy >= 0 && NEG(y) + cy < img.Height)
{
img = Paint.Draw(img, NEG(x) + cx, NEG(y) + cy, cor); // (-x, -y)
}
if (NEG(y) + cx >= 0 && NEG(y) + cx < img.Width && NEG(x) + cy >= 0 && NEG(x) + cy < img.Height)
{
img = Paint.Draw(img, NEG(y) + cx, NEG(x) + cy, cor); // (-y, -x)
}
return(img);
}
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);
}