protected virtual IEnumerator CreateBendingConstraints()
{
bendConstraintsData = new ObiBendConstraintsData();
// Add three batches:
bendConstraintsData.AddBatch(new ObiBendConstraintsBatch());
bendConstraintsData.AddBatch(new ObiBendConstraintsBatch());
bendConstraintsData.AddBatch(new ObiBendConstraintsBatch());
for (int i = 0; i < totalParticles - 2; i++)
{
var batch = bendConstraintsData.batches[i % 3] as ObiBendConstraintsBatch;
Vector3Int indices = new Vector3Int(i, i + 2, i + 1);
float restBend = ObiUtils.RestBendingConstraint(restPositions[indices[0]], restPositions[indices[1]], restPositions[indices[2]]);
batch.AddConstraint(indices, restBend);
if (i < m_ActiveParticleCount - 2)
{
batch.activeConstraintCount++;
}
if (i % 500 == 0)
{
yield return(new CoroutineJob.ProgressInfo("ObiRope: generating structural constraints...", i / (float)(totalParticles - 2)));
}
}
// if the path is closed, add the last, loop closing constraints to a new batch to avoid sharing particles.
if (path.Closed)
{
var loopClosingBatch = new ObiBendConstraintsBatch();
bendConstraintsData.AddBatch(loopClosingBatch);
Vector3Int indices = new Vector3Int(m_ActiveParticleCount - 2, 0, m_ActiveParticleCount - 1);
loopClosingBatch.AddConstraint(indices, 0);
loopClosingBatch.activeConstraintCount++;
var loopClosingBatch2 = new ObiBendConstraintsBatch();
bendConstraintsData.AddBatch(loopClosingBatch2);
indices = new Vector3Int(m_ActiveParticleCount - 1, 1, 0);
loopClosingBatch2.AddConstraint(indices, 0);
loopClosingBatch2.activeConstraintCount++;
}
}
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;
}
}