private void button_draw_Click(object sender, EventArgs e)
{
if (!get_ellipse())
{
return;
}
DrawEllipse drawEllipse = new DrawEllipse(bitmap);
if (comboBox_algo.Text.Equals("DDA"))
{
drawEllipse.DDA(ellipse, Color.Blue);
}
else if (comboBox_algo.Text.Equals("Bresenham"))
{
drawEllipse.Bresenham(ellipse, Color.Blue);
}
else if (comboBox_algo.Text.Equals("MidPoint"))
{
drawEllipse.MidPoint(ellipse, Color.Blue);
}
// refresh picture box every draw
pictureBox_draw.Refresh();
}
private void button_randDraw_Click(object sender, EventArgs e)
{
if (!get_randNum())
{
return;
}
// clear all drawings before random
clearAll();
// if no random list ellipse, or old one is not enough, create new one
// otherwise, use the already have random list ellipse
if (ellipseS.Count < this.numRand)
{
randEllipseS(numRand);
}
// StopWatch object for calculating execution time of the algorithm
// StartNew and Stop for make sure stopwatch is not redundant object
Stopwatch stopwatch = Stopwatch.StartNew();
stopwatch.Stop();
DrawEllipse drawEllipse = new DrawEllipse(bitmap);
if (comboBox_algo.Text.Equals("DDA"))
{
stopwatch.Restart();
for (int i = 0; i < numRand; ++i)
{
drawEllipse.DDA(ellipseS[i], Color.Blue);
}
stopwatch.Stop();
}
else if (comboBox_algo.Text.Equals("Bresenham"))
{
stopwatch.Restart();
for (int i = 0; i < numRand; ++i)
{
drawEllipse.Bresenham(ellipseS[i], Color.Blue);
}
stopwatch.Stop();
}
else if (comboBox_algo.Text.Equals("MidPoint"))
{
stopwatch.Restart();
for (int i = 0; i < numRand; ++i)
{
drawEllipse.MidPoint(ellipseS[i], Color.Blue);
}
stopwatch.Stop();
}
// set running time to text box
textBox_randTime.Text = stopwatch.ElapsedMilliseconds.ToString() + " ms";
// refresh picture box every draw
pictureBox_draw.Refresh();
}