/// <summary>
/// Creates a <see cref="Color"/>-typed face attributes collection using the given face group indices and face group color values.
/// </summary>
/// <param name="faceGroupIndices">The group index attributes collection mapping each face to a particular face group.</param>
/// <param name="faceGroupColors">The colors of the face groups.</param>
/// <returns>A <see cref="Color"/>-typed face attributes collection.</returns>
public static ColorFaceGroupLookupFaceAttribute Create(IntFaceAttribute faceGroupIndices, ColorFaceGroupAttribute faceGroupColors)
{
var instance = CreateInstance <ColorFaceGroupLookupFaceAttribute>();
instance.faceGroupData = faceGroupColors;
instance.faceGroupIndices = faceGroupIndices;
return(instance);
}
public override IEnumerator BeginGeneration()
{
var topology = topologyInputSlot.GetAsset <Topology>();
var faceGroupIndices = new int[topology.internalFaces.Count].AsFaceAttribute();
List <int>[] faceGroupFaceIndices;
var random = randomness.GetRandom();
var clampedRootCount = Mathf.Clamp(groupCount, 1, topology.internalFaces.Count);
faceGroupFaceIndices = new List <int> [clampedRootCount];
var waitHandle = executive.GenerateConcurrently(() =>
{
var rootFaces = new List <Topology.Face>();
var rootFaceEdges = new List <Topology.FaceEdge>();
for (int faceGroupIndex = 0; faceGroupIndex < clampedRootCount; ++faceGroupIndex)
{
faceGroupFaceIndices[faceGroupIndex] = new List <int>();
Topology.Face face;
do
{
face = topology.internalFaces[random.Index(topology.internalFaces.Count)];
} while (rootFaces.Contains(face));
rootFaces.Add(face);
foreach (var edge in face.edges)
{
if (edge.face.isInternal)
{
rootFaceEdges.Add(edge);
}
}
faceGroupIndices[face] = faceGroupIndex;
faceGroupFaceIndices[faceGroupIndex].Add(face.index);
}
TopologyVisitor.VisitFacesInRandomOrder(
rootFaceEdges,
(FaceEdgeVisitor visitor) =>
{
var faceGroupIndex = faceGroupIndices[visitor.edge.nearFace];
faceGroupIndices[visitor.edge] = faceGroupIndex;
faceGroupFaceIndices[faceGroupIndex].Add(visitor.edge.face.index);
visitor.VisitInternalNeighborsExceptSource();
},
random);
});
while (waitHandle.WaitOne(10) == false)
{
yield return(null);
}
faceGroupOutputSlots = GeneratorUtility.ResizeArray(faceGroupOutputSlots, faceGroupFaceIndices.Length,
(int index) =>
{
return(OutputSlot.CreateGrouped <FaceGroup>(this, string.Format("Face Group {0}", index), faceGroupCollectionOutputSlot.name, true, OutputSlot.Availability.DuringGeneration));
},
(OutputSlot output, int index) =>
{
output.DisconnectAll();
output.path = faceGroupCollectionOutputSlot.name;
return(output);
});
var faceGroupCollection = FaceGroupCollection.Create(faceGroupFaceIndices.Length);
for (int faceGroupIndex = 0; faceGroupIndex < faceGroupFaceIndices.Length; ++faceGroupIndex)
{
var faceGroup = ArrayFaceGroup.Create(topology, faceGroupFaceIndices[faceGroupIndex].ToArray()).SetName(faceGroupOutputSlots[faceGroupIndex].name);
faceGroupCollection.faceGroups[faceGroupIndex] = faceGroupOutputSlots[faceGroupIndex].SetAsset(faceGroup);
}
faceGroupCollectionOutputSlot.SetAsset(faceGroupCollection);
faceGroupIndicesOutputSlot.SetAsset(IntFaceAttribute.Create(faceGroupIndices.array));
yield break;
}
public override IEnumerator BeginGeneration()
{
var surface = surfaceInputSlot.GetAsset <QuadrilateralSurface>();
var topology = topologyInputSlot.GetAsset <Topology>();
var facePositions = facePositionsInputSlot.GetAsset <IFaceAttribute <Vector3> >();
int groupCount = 0;
var faceGroupFaceIndices = new List <int> [axisDivisions.x * axisDivisions.y];
var waitHandle = executive.GenerateConcurrently(() =>
{
var axis0Vector = surface.axis0.vector;
var axis1Vector = surface.axis1.vector;
var surfaceNormal = Vector3.Cross(axis0Vector, axis1Vector).normalized;
var axis0Normal = Vector3.Cross(axis0Vector, surfaceNormal).normalized;
var axis1Normal = Vector3.Cross(axis1Vector, surfaceNormal).normalized;
var axis0DividedVector = axis0Vector / axisDivisions.x;
var axis1DividedVector = axis1Vector / axisDivisions.y;
var axis0Dot = Vector3.Dot(axis1Normal, axis0DividedVector);
var axis1Dot = Vector3.Dot(axis0Normal, axis1DividedVector);
var origin = surface.origin;
for (int i = 0; i < faceGroupFaceIndices.Length; ++i)
{
faceGroupFaceIndices[i] = new List <int>();
}
foreach (var face in topology.internalFaces)
{
var facePosition = facePositions[face];
var axis0Offset = Vector3.Dot(axis1Normal, facePosition - origin) / axis0Dot;
var axis1Offset = Vector3.Dot(axis0Normal, facePosition - origin) / axis1Dot;
var axis0Index = Mathf.Clamp(Mathf.FloorToInt(axis0Offset), 0, axisDivisions.x - 1);
var axis1Index = Mathf.Clamp(Mathf.FloorToInt(axis1Offset), 0, axisDivisions.y - 1);
faceGroupFaceIndices[axis0Index + axis1Index * axisDivisions.x].Add(face.index);
}
foreach (var group in faceGroupFaceIndices)
{
if (group.Count > 0)
{
++groupCount;
}
}
});
while (waitHandle.WaitOne(10) == false)
{
yield return(null);
}
faceGroupOutputSlots = GeneratorUtility.ResizeArray(faceGroupOutputSlots, groupCount,
(int index) =>
{
return(null);
},
(OutputSlot output, int index) =>
{
output.DisconnectAll();
return(output);
});
var faceGroupCollection = FaceGroupCollection.Create(groupCount);
var faceGroupIndices = new int[topology.internalFaces.Count];
var groupIndex = 0;
for (int axis1Index = 0; axis1Index < axisDivisions.y; ++axis1Index)
{
for (int axis0Index = 0; axis0Index < axisDivisions.x; ++axis0Index)
{
var group = faceGroupFaceIndices[axis0Index + axis1Index * axisDivisions.x];
if (group.Count > 0)
{
var faceGroupName = string.Format("Face Group [{0}, {1}]", axis0Index, axis1Index);
var faceGroup = ArrayFaceGroup.Create(topology, group.ToArray()).SetName(faceGroupName);
if (faceGroupOutputSlots[groupIndex] == null)
{
faceGroupOutputSlots[groupIndex] = OutputSlot.CreateGrouped <FaceGroup>(this, faceGroupName, faceGroupCollectionOutputSlot.name, true, OutputSlot.Availability.DuringGeneration);
}
else
{
faceGroupOutputSlots[groupIndex].name = faceGroupName;
faceGroupOutputSlots[groupIndex].path = faceGroupCollectionOutputSlot.name;
}
faceGroupCollection.faceGroups[groupIndex] = faceGroupOutputSlots[groupIndex].SetAsset(faceGroup);
foreach (var faceIndex in group)
{
faceGroupIndices[faceIndex] = groupIndex;
}
++groupIndex;
}
}
}
faceGroupCollectionOutputSlot.SetAsset(faceGroupCollection);
faceGroupIndicesOutputSlot.SetAsset(IntFaceAttribute.Create(faceGroupIndices));
yield break;
}
