private void mergeImagesToolStripMenuItem_Click(object sender, EventArgs e)
{
aboutToImageSubtract = true;
tempVal = Convert.ToInt32(Prompt.ShowDialog("Enter value threshold for color subtraction. Then select a color from the first image.", "Image Subtraction"));
}
private void rotateToolStripMenuItem_Click(object sender, EventArgs e)
{
//newX = (int)((x) * Math.Cos(rotation) + (y) * (-Math.Sin(rotation)));
//newY = (int)(((x) * Math.Sin(rotation) + (y) * Math.Cos(rotation)));
double rotation = Math.PI / 180 * Convert.ToDouble(Prompt.ShowDialog("How many degrees you want to rotate the image?", "Rotation"));
result = new Bitmap(source.Width, source.Height); //initalize the image
Color pixel;
int newX, newY, transX, transY, cX, cY;
for (int x = 0; x < source.Width / 2; x++)
{
for (int y = 0; y < source.Height / 2; y++)
{
//quadrant 1
pixel = source.GetPixel(x, y);
newX = (int)((x - source.Width / 2) * Math.Cos(rotation) + (y - source.Height / 2) * (-Math.Sin(rotation)));
newY = (int)(((x - source.Width / 2) * Math.Sin(rotation) + (y - source.Height / 2) * Math.Cos(rotation)));
transX = newX + source.Width / 2;
transY = newY + source.Height / 2;
if (transX >= 0 && transX < source.Width && transY >= 0 && transY < source.Height)
{
result.SetPixel(transX, transY, pixel);
}
//quadrant 2
cX = source.Width / 2 + x;
cY = y;
pixel = source.GetPixel(cX, cY);
newX = (int)((cX - source.Width / 2) * Math.Cos(rotation) + (cY - source.Height / 2) * (-Math.Sin(rotation)));
newY = (int)(((cX - source.Width / 2) * Math.Sin(rotation) + (cY - source.Height / 2) * Math.Cos(rotation)));
transX = newX + source.Width / 2;
transY = newY + source.Height / 2;
if (transX >= 0 && transX < source.Width && transY >= 0 && transY < source.Height)
{
result.SetPixel(transX, transY, pixel);
}
//quadrant 3
cX = x;
cY = source.Height / 2 + y;
pixel = source.GetPixel(cX, cY);
newX = (int)((cX - source.Width / 2) * Math.Cos(rotation) + (cY - source.Height / 2) * (-Math.Sin(rotation)));
newY = (int)(((cX - source.Width / 2) * Math.Sin(rotation) + (cY - source.Height / 2) * Math.Cos(rotation)));
transX = newX + source.Width / 2;
transY = newY + source.Height / 2;
if (transX >= 0 && transX < source.Width && transY >= 0 && transY < source.Height)
{
result.SetPixel(transX, transY, pixel);
}
//quadrant 4
cX = source.Width / 2 + x;
cY = source.Height / 2 + y;
pixel = source.GetPixel(cX, cY);
newX = (int)((cX - source.Width / 2) * Math.Cos(rotation) + (cY - source.Height / 2) * (-Math.Sin(rotation)));
newY = (int)(((cX - source.Width / 2) * Math.Sin(rotation) + (cY - source.Height / 2) * Math.Cos(rotation)));
transX = newX + source.Width / 2;
transY = newY + source.Height / 2;
if (transX >= 0 && transX < source.Width && transY >= 0 && transY < source.Height)
{
result.SetPixel(transX, transY, pixel);
}
}
}
outputPic.Image = result;
}
