public IEnumerable <IObiConstraints> GetConstraints()
{
if (distanceConstraintsData != null && distanceConstraintsData.GetBatchCount() > 0)
{
yield return(distanceConstraintsData);
}
if (bendConstraintsData != null && bendConstraintsData.GetBatchCount() > 0)
{
yield return(bendConstraintsData);
}
if (pinConstraintsData != null && pinConstraintsData.GetBatchCount() > 0)
{
yield return(pinConstraintsData);
}
if (skinConstraintsData != null && skinConstraintsData.GetBatchCount() > 0)
{
yield return(skinConstraintsData);
}
if (tetherConstraintsData != null && tetherConstraintsData.GetBatchCount() > 0)
{
yield return(tetherConstraintsData);
}
if (stretchShearConstraintsData != null && stretchShearConstraintsData.GetBatchCount() > 0)
{
yield return(stretchShearConstraintsData);
}
if (bendTwistConstraintsData != null && bendTwistConstraintsData.GetBatchCount() > 0)
{
yield return(bendTwistConstraintsData);
}
if (shapeMatchingConstraintsData != null && shapeMatchingConstraintsData.GetBatchCount() > 0)
{
yield return(shapeMatchingConstraintsData);
}
if (aerodynamicConstraintsData != null && aerodynamicConstraintsData.GetBatchCount() > 0)
{
yield return(aerodynamicConstraintsData);
}
if (chainConstraintsData != null && chainConstraintsData.GetBatchCount() > 0)
{
yield return(chainConstraintsData);
}
if (volumeConstraintsData != null && volumeConstraintsData.GetBatchCount() > 0)
{
yield return(volumeConstraintsData);
}
}
protected virtual IEnumerator CreateBendingConstraints()
{
bendConstraintsData = new ObiBendConstraintsData();
List <int> particleIndices = new List <int>();
List <int> constraintIndices = new List <int>();
Dictionary <int, int> cons = new Dictionary <int, int>();
for (int i = 0; i < topology.vertices.Count; i++)
{
HalfEdgeMesh.Vertex vertex = topology.vertices[i];
foreach (HalfEdgeMesh.Vertex n1 in topology.GetNeighbourVerticesEnumerator(vertex))
{
float cosBest = 0;
HalfEdgeMesh.Vertex vBest = n1;
foreach (HalfEdgeMesh.Vertex n2 in topology.GetNeighbourVerticesEnumerator(vertex))
{
float cos = Vector3.Dot((n1.position - vertex.position).normalized,
(n2.position - vertex.position).normalized);
if (cos < cosBest)
{
cosBest = cos;
vBest = n2;
}
}
if (!cons.ContainsKey(vBest.index) || cons[vBest.index] != n1.index)
{
cons[n1.index] = vBest.index;
particleIndices.Add(n1.index);
particleIndices.Add(vBest.index);
particleIndices.Add(vertex.index);
constraintIndices.Add(constraintIndices.Count * 3);
}
}
if (i % 500 == 0)
{
yield return(new CoroutineJob.ProgressInfo("ObiCloth: adding bend constraints...", i / (float)topology.vertices.Count));
}
}
constraintIndices.Add(constraintIndices.Count * 3);
int[] constraintColors = GraphColoring.Colorize(particleIndices.ToArray(), constraintIndices.ToArray());
for (int i = 0; i < constraintColors.Length; ++i)
{
int color = constraintColors[i];
int cIndex = constraintIndices[i];
// Add a new batch if needed:
if (color >= bendConstraintsData.GetBatchCount())
{
bendConstraintsData.AddBatch(new ObiBendConstraintsBatch());
}
HalfEdgeMesh.Vertex n1 = topology.vertices[particleIndices[cIndex]];
HalfEdgeMesh.Vertex vBest = topology.vertices[particleIndices[cIndex + 1]];
HalfEdgeMesh.Vertex vertex = topology.vertices[particleIndices[cIndex + 2]];
Vector3 n1Pos = Vector3.Scale(scale, n1.position);
Vector3 bestPos = Vector3.Scale(scale, vBest.position);
Vector3 vertexPos = Vector3.Scale(scale, vertex.position);
float restBend = ObiUtils.RestBendingConstraint(n1Pos, bestPos, vertexPos);
bendConstraintsData.batches[color].AddConstraint(new Vector3Int(particleIndices[cIndex], particleIndices[cIndex + 1], particleIndices[cIndex + 2]), restBend);
}
// Set initial amount of active constraints:
for (int i = 0; i < bendConstraintsData.batches.Count; ++i)
{
bendConstraintsData.batches[i].activeConstraintCount = bendConstraintsData.batches[i].constraintCount;
}
}