void pend_Oscillate(object sender, OscillateEventArgs e)
{
float r = pictureBox1.ClientSize.Height / 10; //радиус круга, изображающего груз
float h = pictureBox1.ClientSize.Height - r; //Длина маятника на экране
PointF pt;
if (bmp != null)
{
bmp.Dispose();
}
if (pictureBox1.Image != null)
{
pictureBox1.Image.Dispose();
}
bmp = new Bitmap(pictureBox1.ClientSize.Width, pictureBox1.ClientSize.Height);
using (Graphics g = Graphics.FromImage(bmp)) {
g.TranslateTransform(pictureBox1.ClientSize.Width / 2, 0);
pt = new PointF(pictureBox1.ClientSize.Width / 4 * e.Scale, 0);
pt.Y = (float)Math.Sqrt(h * h - pt.X * pt.X);
RectangleF rect = RectangleF.FromLTRB(pt.X - r, pt.Y - r, pt.X + r, pt.Y + r);
g.DrawLine(Pens.Black, 0f, 0f, pt.X, pt.Y);
g.FillEllipse(Brushes.CornflowerBlue, rect);
}
pictureBox1.Image = bmp;
Application.DoEvents();
}
protected virtual void OnOscillate(OscillateEventArgs e)
{
EventHandler <OscillateEventArgs> handler = Oscillate;
if (handler != null)
{
handler(this, e);
}
}