private SkinInfoContentCollection[] ProcessSkinInfo(ModelContent model)
{
SkinInfoContentCollection[] info = new SkinInfoContentCollection[model.Meshes.Count];
Dictionary <string, int> boneDict = new Dictionary <string, int>();
foreach (ModelBoneContent b in model.Bones)
{
if (b.Name != null && !boneDict.ContainsKey(b.Name))
{
boneDict.Add(b.Name, b.Index);
}
// do cleanup on root nodes per the Boku-specific needs
if (b.Parent == null)
{
/// Null the root transform. We don't use it, and it's
/// a comfort to know what it is.
b.Transform = Matrix.Identity;
}
}
for (int i = 0; i < info.Length; i++)
{
info[i] = new SkinInfoContentCollection();
BoneIndexer indexer = indexers[i];
ReadOnlyCollection <string> skinnedBoneNames = indexer.SkinnedBoneNames;
Matrix[] absoluteTransforms = new Matrix[model.Bones.Count];
CalculateAbsoluteTransforms(model.Bones[0], absoluteTransforms);
Matrix absoluteMeshTransform;
if (absoluteMeshTransforms == null)
{
absoluteMeshTransform = absoluteTransforms[model.Meshes[i].ParentBone.Index];
}
else
{
absoluteMeshTransform = absoluteMeshTransforms[i];
}
for (int j = 0; j < skinnedBoneNames.Count; j++)
{
string name = skinnedBoneNames[j];
SkinInfoContent content = new SkinInfoContent();
content.BoneIndex = boneDict[name];
content.PaletteIndex = indexer.GetBoneIndex(name);
content.InverseBindPoseTransform = absoluteMeshTransform *
Matrix.Invert(absoluteTransforms[boneDict[name]]);
content.BoneName = name;
info[i].Add(content);
}
}
return(info);
}
private void CreatePaletteIndices(MeshContent mesh)
{
foreach (GeometryContent meshPart in mesh.Geometry)
{
int meshIndex = (int)mesh.OpaqueData["MeshIndex"];
BoneIndexer indexer = indexers[meshIndex];
foreach (VertexChannel channel in meshPart.Vertices.Channels)
{
if (channel.Name == VertexChannelNames.Weights())
{
VertexChannel <BoneWeightCollection> vc =
(VertexChannel <BoneWeightCollection>)channel;
foreach (BoneWeightCollection boneWeights in vc)
{
foreach (BoneWeight weight in boneWeights)
{
indexer.GetBoneIndex(weight.BoneName);
}
}
}
}
}
}
/// <summary>
/// Go through the vertex channels in the geometry and replace the
/// BoneWeightCollection objects with weight and index channels.
/// </summary>
/// <param name="geometry">The geometry to process.</param>
/// <param name="vertexChannelIndex">The index of the vertex channel to process.</param>
/// <param name="context">The processor context.</param>
protected override void ProcessVertexChannel(GeometryContent geometry, int vertexChannelIndex, ContentProcessorContext context)
{
bool boneCollectionsWithZeroWeights = false;
if (geometry.Vertices.Channels[vertexChannelIndex].Name == VertexChannelNames.Weights())
{
int meshIndex = (int)geometry.Parent.OpaqueData["MeshIndex"];
BoneIndexer indexer = indexers[meshIndex];
// Skin channels are passed in from importers as BoneWeightCollection objects
VertexChannel <BoneWeightCollection> vc =
(VertexChannel <BoneWeightCollection>)
geometry.Vertices.Channels[vertexChannelIndex];
int maxBonesPerVertex = 0;
for (int i = 0; i < vc.Count; i++)
{
int count = vc[i].Count;
if (count > maxBonesPerVertex)
{
maxBonesPerVertex = count;
}
}
// Add weights as colors (Converts well to 4 floats)
// and indices as packed 4byte vectors.
Color[] weightsToAdd = new Color[vc.Count];
Byte4[] indicesToAdd = new Byte4[vc.Count];
// Go through the BoneWeightCollections and create a new
// weightsToAdd and indicesToAdd array for each BoneWeightCollection.
for (int i = 0; i < vc.Count; i++)
{
BoneWeightCollection bwc = vc[i];
if (bwc.Count == 0)
{
boneCollectionsWithZeroWeights = true;
continue;
}
bwc.NormalizeWeights(4);
int count = bwc.Count;
if (count > maxBonesPerVertex)
{
maxBonesPerVertex = count;
}
// Add the appropriate bone indices based on the bone names in the
// BoneWeightCollection
Vector4 bi = new Vector4();
bi.X = count > 0 ? indexer.GetBoneIndex(bwc[0].BoneName) : (byte)0;
bi.Y = count > 1 ? indexer.GetBoneIndex(bwc[1].BoneName) : (byte)0;
bi.Z = count > 2 ? indexer.GetBoneIndex(bwc[2].BoneName) : (byte)0;
bi.W = count > 3 ? indexer.GetBoneIndex(bwc[3].BoneName) : (byte)0;
indicesToAdd[i] = new Byte4(bi);
Vector4 bw = new Vector4();
bw.X = count > 0 ? bwc[0].Weight : 0;
bw.Y = count > 1 ? bwc[1].Weight : 0;
bw.Z = count > 2 ? bwc[2].Weight : 0;
bw.W = count > 3 ? bwc[3].Weight : 0;
weightsToAdd[i] = new Color(bw);
}
// Remove the old BoneWeightCollection channel
geometry.Vertices.Channels.Remove(vc);
// Add the new channels
geometry.Vertices.Channels.Add <Byte4>(VertexElementUsage.BlendIndices.ToString(), indicesToAdd);
geometry.Vertices.Channels.Add <Color>(VertexElementUsage.BlendWeight.ToString(), weightsToAdd);
}
else
{
// No skinning info, so we let the base class process the channel
base.ProcessVertexChannel(geometry, vertexChannelIndex, context);
}
if (boneCollectionsWithZeroWeights)
{
context.Logger.LogWarning("", geometry.Identity,
"BonesWeightCollections with zero weights found in geometry.");
}
}