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| private void DrawBrush(Bitmap bmp, Point startPoint, Point endPoint, Color startColor, Color endColor)
{
float len = endPoint.X - startPoint.X;
float deltaRed = (endColor.R - startColor.R) / len;
float deltaGreen = (endColor.G - startColor.G) / len;
float deltaBlue = (endColor.B - startColor.B) / len;
float r = startColor.R, g = startColor.G, b = startColor.B;
for (int x = startPoint.X; x < endPoint.X; x++)
{
r += deltaRed;
g += deltaGreen;
b += deltaBlue;
for (int y = startPoint.Y; y < endPoint.Y; y++)
{
bmp.SetPixel(x, y, Color.FromArgb((int) r, (int) g, (int) b));
}
}
}
private void button1_Click(object sender, EventArgs e)
{
Bitmap img = new Bitmap(pictureBox1.Width, pictureBox1.Height);
DrawBrush(img, new Point(0, 0), new Point(img.Width / 2, img.Height), Color.Red, Color.Green);
DrawBrush(img, new Point(img.Width / 2, 0), new Point(img.Width, img.Height), Color.Green, Color.Blue);
pictureBox1.Image = img;
} |
