public void Init()
{
if (soft.masses == null)
{
soft.masses = new List <Mass2D>();
}
soft.masses.Clear();
float ms = Mass / (float)(NumMasses);
int ax = (int)axis;
Vector2 pos = Vector2.zero;
//DampingRatio = Mathf.Clamp01(DampingRatio);
damp = (DampingRatio * 0.45f) * (2.0f * Mathf.Sqrt(ms * spring));
for (int i = 0; i < NumMasses; i++)
{
float alpha = (float)i / (float)(NumMasses - 1);
pos.x = Mathf.Lerp(bbox.min[ax], bbox.max[ax], alpha);
//Debug.Log("m[" + i + "] alpha " + alpha + " " + pos.x);
Mass2D rm = new Mass2D(ms, pos);
soft.masses.Add(rm);
}
masspos = new Vector2[soft.masses.Count + 2];
for (int i = 0; i < soft.masses.Count; i++)
{
masspos[i + 1] = soft.masses[i].pos;
}
if (soft.springs == null)
{
soft.springs = new List <Spring2D>();
}
soft.springs.Clear();
if (soft.constraints == null)
{
soft.constraints = new List <Constraint2D>();
}
soft.constraints.Clear();
for (int i = 0; i < soft.masses.Count - 1; i++)
{
Spring2D spr = new Spring2D(i, i + 1, spring, damp, soft);
//float len = spr.restLen;
spr.restLen *= SpringCompress;
soft.springs.Add(spr);
if (Constraints)
{
// Do we use restLen or len here?
Constraint2D lcon = Constraint2D.CreateLenCon(i, i + 1, spr.restLen);
soft.constraints.Add(lcon);
}
}
#if true
if (BendSprings)
{
int gap = 2;
for (int i = 0; i < soft.masses.Count - gap; i++)
{
float alpha = (float)i / (float)soft.masses.Count;
Spring2D spr = new Spring2D(i, i + gap, stiffspring * stiffnessCrv.Evaluate(alpha), stiffdamp * stiffnessCrv.Evaluate(alpha), soft);
soft.springs.Add(spr);
Constraint2D lcon = Constraint2D.CreateLenCon(i, i + gap, spr.restLen);
soft.constraints.Add(lcon);
}
}
#endif
// Apply fixed end constraints
Constraint2D pcon;
//if ( left )
//{
// pcon = Constraint2D.CreatePointTargetCon(0, left);
//}
//else
{
pos.x = bbox.min[ax];
pos.y = 0.0f;
pcon = Constraint2D.CreatePointCon(0, pos);
}
pconl = soft.constraints.Count;
soft.constraints.Add(pcon);
//if ( right )
//{
// pcon = Constraint2D.CreatePointTargetCon(soft.masses.Count - 1, left);
//}
//else
{
pos.x = bbox.max[ax];
pcon = Constraint2D.CreatePointCon(soft.masses.Count - 1, pos);
}
pconr = soft.constraints.Count;
soft.constraints.Add(pcon);
soft.DoConstraints();
}
public void Init()
{
if ( soft.masses == null )
soft.masses = new List<Mass2D>();
soft.masses.Clear();
float ms = Mass / (float)(NumMasses);
int ax = (int)axis;
Vector2 pos = Vector2.zero;
//DampingRatio = Mathf.Clamp01(DampingRatio);
damp = (DampingRatio * 0.45f) * (2.0f * Mathf.Sqrt(ms * spring));
for ( int i = 0; i < NumMasses; i++ )
{
float alpha = (float)i / (float)(NumMasses - 1);
pos.x = Mathf.Lerp(bbox.min[ax], bbox.max[ax], alpha);
//Debug.Log("m[" + i + "] alpha " + alpha + " " + pos.x);
Mass2D rm = new Mass2D(ms, pos);
soft.masses.Add(rm);
}
masspos = new Vector2[soft.masses.Count + 2];
for ( int i = 0; i < soft.masses.Count; i++ )
masspos[i + 1] = soft.masses[i].pos;
if ( soft.springs == null )
soft.springs = new List<Spring2D>();
soft.springs.Clear();
if ( soft.constraints == null )
soft.constraints = new List<Constraint2D>();
soft.constraints.Clear();
for ( int i = 0; i < soft.masses.Count - 1; i++ )
{
Spring2D spr = new Spring2D(i, i + 1, spring, damp, soft);
//float len = spr.restLen;
spr.restLen *= SpringCompress;
soft.springs.Add(spr);
if ( Constraints )
{
// Do we use restLen or len here?
Constraint2D lcon = Constraint2D.CreateLenCon(i, i + 1, spr.restLen);
soft.constraints.Add(lcon);
}
}
#if true
if ( BendSprings )
{
int gap = 2;
for ( int i = 0; i < soft.masses.Count - gap; i++ )
{
float alpha = (float)i / (float)soft.masses.Count;
Spring2D spr = new Spring2D(i, i + gap, stiffspring * stiffnessCrv.Evaluate(alpha), stiffdamp * stiffnessCrv.Evaluate(alpha), soft);
soft.springs.Add(spr);
Constraint2D lcon = Constraint2D.CreateLenCon(i, i + gap, spr.restLen);
soft.constraints.Add(lcon);
}
}
#endif
// Apply fixed end constraints
Constraint2D pcon;
//if ( left )
//{
// pcon = Constraint2D.CreatePointTargetCon(0, left);
//}
//else
{
pos.x = bbox.min[ax];
pos.y = 0.0f;
pcon = Constraint2D.CreatePointCon(0, pos);
}
pconl = soft.constraints.Count;
soft.constraints.Add(pcon);
//if ( right )
//{
// pcon = Constraint2D.CreatePointTargetCon(soft.masses.Count - 1, left);
//}
//else
{
pos.x = bbox.max[ax];
pcon = Constraint2D.CreatePointCon(soft.masses.Count - 1, pos);
}
pconr = soft.constraints.Count;
soft.constraints.Add(pcon);
soft.DoConstraints();
}