private void UpdateViewBounds()
{
try {
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() * fViewWidth;
double aY = vRB.Magnitude() * fViewHeight;
if (aX > 1.0f || aY > 1.0f)
{
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 UpdateGraphBounds()
{
ArborPoint lt = new ArborPoint(-1.0f, -1.0f);
ArborPoint rb = new ArborPoint(+1.0f, +1.0f);
for (int i = 0, nodesCount = fNodes.Count; i < nodesCount; i++)
{
ArborPoint pt = fNodes[i].Pt;
if (pt.IsExploded())
{
continue;
}
if (pt.X < lt.X)
{
lt.X = pt.X;
}
if (pt.Y < lt.Y)
{
lt.Y = pt.Y;
}
if (pt.X > rb.X)
{
rb.X = pt.X;
}
if (pt.Y > rb.Y)
{
rb.Y = pt.Y;
}
}
lt.X -= 1.2f;
lt.Y -= 1.2f;
rb.X += 1.2f;
rb.Y += 1.2f;
ArborPoint sz = rb.Sub(lt);
ArborPoint cent = lt.Add(sz.Div(2.0f));
ArborPoint d = new ArborPoint(Math.Max(sz.X, 4.0f), Math.Max(sz.Y, 4.0f)).Div(2.0f);
fGraphBounds = new PSBounds(cent.Sub(d), cent.Add(d));
fBHTree = new BarnesHutTree(fGraphBounds.LeftTop, fGraphBounds.RightBottom, Theta);
}
