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);
}
}
public void Test_Magnitude()
{
var pt = new ArborPoint(3, 4);
Assert.AreEqual(3.0f, pt.X);
Assert.AreEqual(4.0f, pt.Y);
Assert.AreEqual(5d, pt.Magnitude());
}
private void ApplySprings()
{
for (int i = 0, edgesCount = fEdges.Count; i < edgesCount; i++)
{
ArborEdge edge = fEdges[i];
ArborPoint s = edge.Target.Pt.Sub(edge.Source.Pt);
ArborPoint r = s.Normalize();
double q = edge.Stiffness * (edge.Length - s.Magnitude());
edge.Source.ApplyForce(r.Mul(q * -0.5f));
edge.Target.ApplyForce(r.Mul(q * 0.5f));
}
}
