protected void applyHookesLaw()
{
foreach (Edge e in graph.edges)
{
Spring spring = GetSpring(e);
AbstractVector d = spring.point2.position - spring.point1.position;
float displacement = spring.Length - d.Magnitude();
AbstractVector direction = d.Normalize();
if (spring.point1.node.Pinned && spring.point2.node.Pinned)
{
spring.point1.ApplyForce(direction * 0.0f);
spring.point2.ApplyForce(direction * 0.0f);
}
else if (spring.point1.node.Pinned)
{
spring.point1.ApplyForce(direction * 0.0f);
spring.point2.ApplyForce(direction * (spring.K * displacement));
}
else if (spring.point2.node.Pinned)
{
spring.point1.ApplyForce(direction * (spring.K * displacement * -1.0f));
spring.point2.ApplyForce(direction * 0.0f);
}
else
{
spring.point1.ApplyForce(direction * (spring.K * displacement * -0.5f));
spring.point2.ApplyForce(direction * (spring.K * displacement * 0.5f));
}
}
}
private void ApplyHookesLaw()
{
foreach (var e in Graph.Edges)
{
Spring spring = GetSpring(e);
AbstractVector d = spring.Point2.Position - spring.Point1.Position;
float displacement = spring.Length - d.Magnitude();
AbstractVector direction = d.Normalize();
if (spring.Point1.Node.Pinned && spring.Point2.Node.Pinned)
{
spring.Point1.ApplyForce(direction * 0.0f);
spring.Point2.ApplyForce(direction * 0.0f);
}
else if (spring.Point1.Node.Pinned)
{
spring.Point1.ApplyForce(direction * 0.0f);
spring.Point2.ApplyForce(direction * (spring.K * displacement));
}
else if (spring.Point2.Node.Pinned)
{
spring.Point1.ApplyForce(direction * (spring.K * displacement * -1.0f));
spring.Point2.ApplyForce(direction * 0.0f);
}
else
{
spring.Point1.ApplyForce(direction * (spring.K * displacement * -0.5f));
spring.Point2.ApplyForce(direction * (spring.K * displacement * 0.5f));
}
}
}
private void AttractToCentre()
{
foreach (var n in Graph.Nodes)
{
Particle point = GetParticle(n);
if (point.Node.Pinned)
{
continue;
}
AbstractVector direction = point.Position * -1.0f;
float displacement = direction.Magnitude();
direction = direction.Normalize();
point.ApplyForce(direction * (Stiffness * displacement * 0.4f));
}
}
protected void attractToCentre()
{
foreach (Node n in graph.nodes)
{
Point point = GetPoint(n);
if (!point.node.Pinned)
{
AbstractVector direction = point.position * -1.0f;
//point.ApplyForce(direction * ((float)Math.Sqrt((double)(Repulsion / 100.0f))));
float displacement = direction.Magnitude();
direction = direction.Normalize();
point.ApplyForce(direction * (Stiffness * displacement * 0.4f));
}
}
}
// TODO: change this for group only after node grouping
// Coulombs Law explains what force
// Force = (constant * | q1 * q2| )
// -------------------------
// distance^2
protected void applyCoulombsLaw()
{
foreach (Node n1 in graph.nodes)
{
Point point1 = GetPoint(n1);
foreach (Node n2 in graph.nodes)
{
Point point2 = GetPoint(n2);
if (point1 != point2)
{
AbstractVector d = point1.position - point2.position;
float distance = d.Magnitude() + 0.1f;
AbstractVector direction = d.Normalize();
if (n1.Pinned && n2.Pinned)
{
point1.ApplyForce(direction * 0.0f);
point2.ApplyForce(direction * 0.0f);
}
else if (n1.Pinned)
{
point1.ApplyForce(direction * 0.0f);
//point2.ApplyForce((direction * Repulsion) / (distance * distance * -1.0f));
point2.ApplyForce((direction * Repulsion) / (distance * -1.0f));
}
else if (n2.Pinned)
{
//point1.ApplyForce((direction * Repulsion) / (distance * distance));
point1.ApplyForce((direction * Repulsion) / (distance));
point2.ApplyForce(direction * 0.0f);
}
else
{
// point1.ApplyForce((direction * Repulsion) / (distance * distance * 0.5f));
// point2.ApplyForce((direction * Repulsion) / (distance * distance * -0.5f));
point1.ApplyForce((direction * Repulsion) / (distance * 0.5f));
point2.ApplyForce((direction * Repulsion) / (distance * -0.5f));
}
}
}
}
}
// TODO: change this for group only after node grouping
private void ApplyCoulombsLaw()
{
foreach (var n1 in Graph.Nodes)
{
Particle point1 = GetParticle(n1);
foreach (var n2 in Graph.Nodes)
{
Particle point2 = GetParticle(n2);
if (point1 == point2)
{
continue;
}
AbstractVector d = point1.Position - point2.Position;
float distance = d.Magnitude() + 0.1f;
AbstractVector direction = d.Normalize();
if (n1.Pinned && n2.Pinned)
{
point1.ApplyForce(direction * 0.0f);
point2.ApplyForce(direction * 0.0f);
}
else if (n1.Pinned)
{
point1.ApplyForce(direction * 0.0f);
point2.ApplyForce((direction * Repulsion) / (distance * -1.0f));
}
else if (n2.Pinned)
{
point1.ApplyForce((direction * Repulsion) / (distance));
point2.ApplyForce(direction * 0.0f);
}
else
{
point1.ApplyForce((direction * Repulsion) / (distance * 0.5f));
point2.ApplyForce((direction * Repulsion) / (distance * -0.5f));
}
}
}
}