private void updateViewBounds()
{
try
{
this.updateGraphBounds();
if (fViewBounds == null)
{
fViewBounds = fGraphBounds;
return;
}
ArborPoint vLT = fGraphBounds.LeftTop.sub(fViewBounds.LeftTop).mul(Mag);
ArborPoint vRB = fGraphBounds.RightBottom.sub(fViewBounds.RightBottom).mul(Mag);
double aX = vLT.magnitude() * this.fScreenWidth;
double aY = vRB.magnitude() * this.fScreenHeight;
if (aX > 1 || aY > 1)
{
ArborPoint nbLT = fViewBounds.LeftTop.add(vLT);
ArborPoint nbRB = fViewBounds.RightBottom.add(vRB);
fViewBounds = new PSBounds(nbLT, nbRB);
}
}
catch (Exception ex)
{
Debug.WriteLine("ArborSystem.updateViewBounds(): " + ex.Message);
}
}
private void applySprings()
{
foreach (ArborEdge edge in fEdges)
{
ArborPoint s = edge.Target.Pt.sub(edge.Source.Pt);
double sMag = s.magnitude();
ArborPoint r = ((sMag > 0) ? s : ArborPoint.newRnd(1)).normalize();
double q = edge.Stiffness * (edge.Length - sMag);
edge.Source.applyForce(r.mul(q * -0.5));
edge.Target.applyForce(r.mul(q * 0.5));
}
}