/**
* Retrieves the indices of the particles that influece a given vertex. In the weight
* field of each influence, the squared distance from the particle to the vertex is provided.
*/
public List <ParticleInfluence> GetParticleInfluences(Vector3 vertex)
{
// TODO: try to make it faster.
List <ParticleInfluence> allInfluences = new List <ParticleInfluence>();
// Get squared distance to all particles:
for (int i = 0; i < proxy.positions.Length; ++i)
{
ParticleInfluence influence = new ParticleInfluence();
influence.particleIndex = i;
influence.bindVector = transform.InverseTransformVector(transform.TransformPoint(vertex) - proxy.GetParticlePosition(i));
influence.weight = influence.bindVector.sqrMagnitude;
allInfluences.Add(influence);
}
// Sort by distance:
allInfluences.Sort(
delegate(ParticleInfluence x, ParticleInfluence y)
{
return(x.weight.CompareTo(y.weight));
});
// Return the K nearest:
return(allInfluences.GetRange(0, numInfluences));
}
public override void UpdateParticleEditorInformation()
{
for (int i = 0; i < cloth.positions.Length; i++)
{
wsPositions[i] = cloth.GetParticlePosition(i);
}
if (cloth.clothMesh != null)
{
for (int i = 0; i < cloth.positions.Length; i++)
{
facingCamera[i] = IsParticleFacingCamera(Camera.current, i);
}
}
}
public override void UpdateParticleEditorInformation()
{
for (int i = 0; i < cloth.positions.Length; i++)
{
wsPositions[i] = cloth.GetParticlePosition(i);
}
if (cloth.clothMesh != null && Camera.current != null)
{
for (int i = 0; i < cloth.clothMesh.vertexCount; i++)
{
int particle = cloth.topology.visualMap[i];
Vector3 camToParticle = Camera.current.transform.position - wsPositions[particle];
sqrDistanceToCamera[particle] = camToParticle.sqrMagnitude;
facingCamera[particle] = (Vector3.Dot(cloth.transform.TransformVector(cloth.MeshNormals[i]), camToParticle) > 0);
}
}
}