public void Grow(float deltaTime)
{
if (length < MaxLength)
{
length += deltaTime * Random.Range(GrowthRate * 0.50f, GrowthRate);
if (length > hairNodes.Count * nodeLength)
{
// add a new 'node' to this strand
GameObject go = Instantiate(HairNodePrefab, transform);
HairNode script = go.GetComponent <HairNode>();
script.SetHead(head);
go.transform.parent = transform;
if (hairNodes.Count == 0)
{
// grow first node straight out from the head
script.position = transform.position + (transform.position - head.transform.position).normalized * 0.1f;
}
else
{
// grow next node in a straight line with previous nodes
GameObject prior = hairNodes[hairNodes.Count - 1];
GameObject priorer = NodeBefore(hairNodes.Count - 1);
script.position = prior.transform.position + (prior.transform.position - priorer.transform.position).normalized * 0.1f;
}
go.transform.position = script.lastPosition = script.position;
hairNodes.Add(go);
}
}
}
void ConstrainLine(GameObject node1, GameObject node2, bool locked1)
{
HairNode script1 = null;
Vector3 p1;
if (!locked1)
{
script1 = node1.GetComponent <HairNode>();
p1 = script1.position;
}
else
{
p1 = transform.position;
}
HairNode script2 = node2.GetComponent <HairNode>();
Vector3 p2 = script2.position;
Vector3 diff = p2 - p1;
float distance = diff.magnitude;
float move = ((nodeLength - distance) / distance) / 2.0f;
diff *= move;
if (!locked1)
{
script1.position -= diff;
script2.position += diff;
}
else
{
script2.position += diff * 2;
}
}
void lengthConstraint(HairNode hairNode1, HairNode hairNode2, int index)
{
float distance = Vector3.Distance(hairNode1.curPos, hairNode2.curPos);
Vector3 newPos1 = hairNode1.curPos + (hairNode2.curPos - hairNode1.curPos) *
(distance - Mathf.Pow(length, (hairNodes.Count - 1 - index))) / (2 * distance);
Vector3 newPos2 = hairNode2.curPos - (hairNode2.curPos - hairNode1.curPos) *
(distance - Mathf.Pow(length, (hairNodes.Count - 1 - index))) / (2 * distance);
hairNode1.curPos = newPos1;
hairNode2.curPos = newPos2;
}
void collideSphere(HairNode hairNode)
{
float distance = Vector3.Distance(hairNode.curPos, Head.position);
if (distance < 1.15)
{
double newX = 1.15 / distance * (hairNode.curPos.x - Head.position.x) + Head.position.x;
double newY = 1.15 / distance * (hairNode.curPos.y - Head.position.y) + Head.position.y;
double newZ = 1.15 / distance * (hairNode.curPos.z - Head.position.z) + Head.position.z;
Vector3 newPos = new Vector3((float)newX, (float)newY, (float)newZ);
hairNode.curPos = newPos;
}
}
void Verlet(HairNode hairNode)
{
timer += Time.deltaTime;
Vector3 at = new Vector3(0, -g, 0);
at += Force * Mathf.Abs(Mathf.Sin(10 * timer * Mathf.Deg2Rad));
if (timer >= 360.0f)
{
timer -= 360.0f;
}
Vector3 nextPos = hairNode.curPos + D * (hairNode.curPos - hairNode.prePos) +
at * Mathf.Pow(deltaT, 2);
hairNode.prePos = hairNode.curPos;
hairNode.curPos = nextPos;
}
void Update()
{
// Profiler.BeginSample("verlet");
// iterate the hairNodes to update their Verlet parameters
foreach (GameObject go in hairNodes)
{
HairNode script = go.GetComponent <HairNode>();
script.VerletMove(Time.deltaTime);
}
// fix the Verlet line length constraints
int c = iterations;
while (c-- > 0)
{
ConstrainLines();
}
foreach (GameObject go in hairNodes)
{
HairNode script = go.GetComponent <HairNode>();
script.VerletConstrainHead();
}
Vector3 prior = transform.position;
foreach (GameObject go in hairNodes)
{
HairNode script = go.GetComponent <HairNode>();
if (prior != null)
{
script.VerletConnect(prior);
}
prior = go.transform.position;
}
// Profiler.EndSample();
}
void Start()
{
Hair = this.GetComponent <Transform>();
Head = GameObject.FindGameObjectWithTag("Head").GetComponent <Transform>();
hairNodes = new List <HairNode>();
for (int i = 0; i < transform.childCount; i++)
{
HairNode hairNode = new HairNode();
hairNode.pointTrans = transform.GetChild(i);
hairNode.curPos = transform.GetChild(i).position;
hairNode.prePos = transform.GetChild(i).position;
hairNodes.Add(hairNode);
}
rootPos = hairNodes[0].curPos;
selfLinerender = this.GetComponent <LineRenderer>();
//Debug.Log(hairNodes.Count);
for (int i = 0; i < hairNodes.Count; i++)
{
selfLinerender.SetPosition(i, hairNodes[i].curPos);
}
//Debug.Log(selfLinerender.positionCount);
}
