bool DistanceBtw(Point p, Pivot joint)
{
bool ret = false;
double x = p.X - joint.x;
double y = p.Y - joint.y;
x *= x;
y *= y;
if (Math.Sqrt(x + y) <= 2 * joint.r)
{
ret = true;
}
return(ret);
}
protected override void OnMouseDown(MouseEventArgs e)
{
moving = true;
if (DistanceBtwO(e.Location, piv))
{
selPo = piv;
}
for (int i = 0; i < pivots.Count; i++)
{
if (DistanceBtw(e.Location, pivots[i]))
{
selP = pivots[i];
}
}
}
protected override void OnMouseUp(MouseEventArgs e)
{
moving = false;
selP = null;
selPo = null;
}