private void button1_Click(object sender, EventArgs e)
{
Bitmap bmp = new Bitmap(Width, Height);
using (Graphics g = Graphics.FromImage(bmp))
{
g.Clear(BackColor);
}
int x0 = int.Parse(textBox1.Text);
int y0 = int.Parse(textBox2.Text);
int x1 = int.Parse(textBox3.Text);
int y1 = int.Parse(textBox4.Text);
float deltaX = x1 - x0;
float deltaY = y1 - y0;
float error = 0;
int y = y0;
float deltaError;
if (deltaX == 0)
{
for (y = y0; y <= y1; y++)
{
bmp.SetPixel(x0, y, Color.Blue);
}
}
else
{
deltaError = Math.Abs(deltaY / deltaX);
for (int x = x0; x <= x1; x++)
{
bmp.SetPixel(x, y, Color.Blue);
error += deltaError;
if (error >= 0.5)
{
y += 1;
error -= 1;
}
}
}
BackgroundImage = bmp;
}
