public void AddConnection(Connection c)
{
connections.Add(c);
}
protected void DrawSynapse(Pen pen, Graphics gr, Point start, Point end, Connection.CMode mode)
{
double t = Math.Atan2(end.Y - start.Y, end.X - start.X);
double endt = Math.Atan2(start.Y - end.Y, start.X - end.X);
// start at the circumference of the circle.
Size offset = new Size((int)(5 * Math.Cos(t)), (int)(5 * Math.Sin(t)));
// end at the circumference of the target neuron circle.
Point endOffset = new Point((int)(15 * Math.Cos(endt)), (int)(15 * Math.Sin(endt)));
end.Offset(endOffset);
gr.DrawLine(pen, start + offset, end);
// the synapse is a triangle whose base is opposite and perpendicular to the endpoint.
double v1angle = t - 0.785398163;
double v2angle = t + 0.785398163;
Point v1 = new Point((int)(10 * Math.Cos(v1angle)), (int)((10 * Math.Sin(v1angle))));
v1.Offset(end);
Point v2 = new Point((int)(10 * Math.Cos(v2angle)), (int)((10 * Math.Sin(v2angle))));
v2.Offset(end);
switch (mode)
{
case Connection.CMode.Excitatory:
// A white triangle.
gr.DrawLine(pen, end, v1);
gr.DrawLine(pen, end, v2);
gr.DrawLine(pen, v1, v2);
break;
case Connection.CMode.Inhibitory:
// A black triangle.
gr.FillPolygon(brushBlack, new Point[] { end, v1, v2 }, System.Drawing.Drawing2D.FillMode.Winding);
break;
}
}