/// <summary>Attaches the spider to the web.</summary>
private void Attach(Spider spider)
{
ThreadSegment threadSegment = _threadSegments[_threadSegments.Count - 1];
float dist = (spider.transform.position - threadSegment.PosNow).magnitude;
Vector3 changeDir = (spider.transform.position - threadSegment.PosNow).normalized;
Vector3 changeAmount = changeDir * dist;
spider.transform.position -= changeAmount * 0.5f;
threadSegment.PosNow += changeAmount * 0.5f;
_threadSegments[_threadSegments.Count - 1] = threadSegment;
}
private void ApplyConstraints()
{
// Constraint (Attaching the web to fixed points)
foreach (KeyValuePair <int, Vector3> pointCoords in _attachedPoints)
{
ThreadSegment segment = _threadSegments[pointCoords.Key];
segment.PosNow = pointCoords.Value;
_threadSegments[pointCoords.Key] = segment;
}
// Constraint (Two points in the thread will always need to keep a certain distance apart)
for (int i = 0; i < _threadSegments.Count - 1; i++)
{
ThreadSegment firstSegment = _threadSegments[i];
ThreadSegment secondSegment = _threadSegments[i + 1];
float dist = (firstSegment.PosNow - secondSegment.PosNow).magnitude;
float error = Mathf.Abs(dist - ThreadSegLen);
Vector3 changeDir = Vector3.zero;
if (dist > ThreadSegLen)
{
changeDir = (firstSegment.PosNow - secondSegment.PosNow).normalized;
}
else
{
changeDir = (secondSegment.PosNow - firstSegment.PosNow).normalized;
}
Vector3 changeAmount = changeDir * error;
if (i != 0)
{
firstSegment.PosNow -= changeAmount * 0.5f;
_threadSegments[i] = firstSegment;
secondSegment.PosNow += changeAmount * 0.5f;
_threadSegments[i + 1] = secondSegment;
}
else
{
secondSegment.PosNow += changeAmount;
_threadSegments[i + 1] = secondSegment;
}
}
if (_spiderIsAttached)
{
Attach(_spider);
}
}
private void Simulate()
{
//SIMULATION
for (int i = 0; i < _threadSegments.Count; i++)
{
ThreadSegment segment = _threadSegments[i];
Vector3 velocity = segment.PosNow - segment.PosOld;
segment.PosOld = segment.PosNow;
segment.PosNow += velocity + _forceGravity * Time.deltaTime + _wind.GetSpeed(segment.PosNow.y) * Time.deltaTime;
_threadSegments[i] = segment;
}
//CONSTRAINTS
for (int i = 0; i < 40; i++)
{
ApplyConstraints();
}
}
