// did bezier CP move from last set state?
protected static bool ControlPointMoved(BezierCPComponent cp)
{
if (!cp)
{
throw new System.ArgumentException("Null ref. exception. Check to see if reference is missing in BezierCPComponent Script...");
}
return(!EqualPoint(cp.transform.localPosition, cp.Lp));
}
// For Bezier Control Point movement
protected override void OnUpdate()
{
foreach (var entity in GetEntities <CPFilter>())
{
BezierCPComponent cp = entity.cp;
if (!cp.tangentInfo.tangent)
{
continue;
}
// if this transform moves then update neighbors
if (ControlPointMoved(cp))
{
Vector3 lp = cp.transform.parent.TransformPoint(cp.Lp);
Vector3 v = cp.transform.position - lp;
BezierCPComponent.TangentInfo ti = cp.tangentInfo;
ti.adjcp0.transform.position += v;
ti.adjcp0.Lp = ti.adjcp0.transform.localPosition;
ti.adjcp1.transform.position += v;
ti.adjcp1.Lp = ti.adjcp1.transform.localPosition;
cp.Lp = cp.transform.localPosition;
}
// if neighbor 0 moves then update neighbor 1 position
else if (ControlPointMoved(cp.tangentInfo.adjcp0))
{
Transform A0 = cp.tangentInfo.adjcp0.transform;
Transform C = cp.transform;
Transform A1 = cp.tangentInfo.adjcp1.transform;
if (cp.tangentInfo.lockDirection)
{
Vector3 v = A0.position - C.position;
if (!cp.tangentInfo.lockDirectionSet)
{
cp.tangentInfo.lockDir = v.normalized;
cp.tangentInfo.lockDirectionSet = true;
}
float d = Vector3.Dot(v, cp.tangentInfo.lockDir);
A0.position = C.position + d * cp.tangentInfo.lockDir;
}
else
{
Vector3 v = C.position - A0.position;
float d = (C.position - A1.position).magnitude;
v.Normalize();
A1.position = cp.transform.position + d * v;
cp.tangentInfo.lockDirectionSet = false;
}
cp.tangentInfo.adjcp1.Lp = cp.tangentInfo.adjcp1.transform.localPosition;
cp.tangentInfo.adjcp0.Lp = cp.tangentInfo.adjcp0.transform.localPosition;
}
// opposite of above
else if (ControlPointMoved(cp.tangentInfo.adjcp1))
{
Transform A0 = cp.tangentInfo.adjcp0.transform;
Transform C = cp.transform;
Transform A1 = cp.tangentInfo.adjcp1.transform;
if (cp.tangentInfo.lockDirection)
{
Vector3 v = A1.position - C.position;
if (!cp.tangentInfo.lockDirectionSet)
{
cp.tangentInfo.lockDir = v.normalized;
cp.tangentInfo.lockDirectionSet = true;
}
float d = Vector3.Dot(v, cp.tangentInfo.lockDir);
A1.position = C.position + d * cp.tangentInfo.lockDir;
}
else
{
Vector3 v = C.position - A1.transform.position;
float d = (C.position - A0.position).magnitude;
v.Normalize();
A0.position = C.position + d * v;
}
cp.tangentInfo.adjcp1.Lp = A1.localPosition;
cp.tangentInfo.adjcp0.Lp = A0.localPosition;
}
}
}
