public Boolean ExtractSkeletalMeshData(Node rootBoneNode, List <Bone> bones, ref H1SkeletalContext newContext)
{
H1SkeletalContext.JointNode rootNode = new H1SkeletalContext.JointNode();
ExtractSkeletalMeshDataRecursive(rootBoneNode, bones, ref rootNode);
newContext.Root = rootNode;
return(true);
}
public H1StaticLODModel PrepareProcessAssetContext(H1SkeletalContext skeletalContext)
{
if (m_SkeletalMeshResource == null)
{
return(null);
}
// @TODO - temporary low LOD model, fix this
H1StaticLODModel staticLODModel = m_SkeletalMeshResource.AddLODModel();
// add root node that controls all animation motion
H1ReferenceSkeleton refSkeleton = m_Skeleton.RefSkeleton;
// construct refSkeleton
List <H1SkeletalContext.JointNode> jointNodes = skeletalContext.JointNodes;
// to construct local transforms for each bone
List <BoneOffsetTransformSet> boneOffsetTransforms = new List <BoneOffsetTransformSet>();
foreach (H1SkeletalContext.JointNode jointNode in jointNodes)
{
// if is not marked as bone node space, skip
if (!jointNode.MarkedAsBoneSpace)
{
continue;
}
// prepare data to process bone node
H1MeshBoneInfo meshBoneInfo = new H1MeshBoneInfo();
meshBoneInfo.Name = jointNode.JointName;
// recursively find bone-space marked parent node (based on H1SkeletalContext.JointNode)
// we need to reapply parent index based on 'refSkeleton.RefBoneInfoList'
Int32 currParentIndex = jointNodes.FindIndex(x =>
{
if (jointNode.Parent == null)
{
return(false);
}
return(x.JointName == jointNode.Parent.JointName);
});
while (currParentIndex != -1 && // if not reaching to root node
!jointNodes[currParentIndex].MarkedAsBoneSpace) // and if is not marked by bone-space
{
currParentIndex = jointNodes.FindIndex(x =>
{
if (jointNodes[currParentIndex].Parent == null)
{
return(false);
}
return(x.JointName == jointNodes[currParentIndex].Parent.JointName);
});
}
meshBoneInfo.ParentIndex = currParentIndex;
// the new index should be same with RefBoneBases
Int32 newBoneInfoIndex = refSkeleton.RefBoneInfoList.Count;
Int32 newBoneBaseIndex = refSkeleton.RefBoneBases.Count;
if (newBoneBaseIndex != newBoneInfoIndex)
{
return(null);
}
refSkeleton.RefBoneInfoList.Add(meshBoneInfo);
// what I learned from this disabled code section
// 1. ASSIMP has separate node space and bone node space (transformation matrix)
// 2. we need to handle those differently
// - vertices resided in particular node space (mesh space we called) should be transformed into root node space (world space)
// - localTransform in refSkeleton should be set by offsetMatrix in JointNode.JointData
H1Transform boneBase = new H1Transform();
boneBase.Translation = jointNode.NodeLocalTransform.Translation;
boneBase.Scaling = jointNode.NodeLocalTransform.Scaling;
boneBase.Rotation = jointNode.NodeLocalTransform.Rotation;
// allocate the space in advance
refSkeleton.RefBoneBases.Add(boneBase);
refSkeleton.AddNameToIndexPair(meshBoneInfo.Name, newBoneInfoIndex);
// add bone offset transform set
boneOffsetTransforms.Add(new BoneOffsetTransformSet());
// looping joint data
foreach (H1SkeletalContext.Joint jointData in jointNode.JointDataList)
{
H1Transform meshContextLocalToGlobalTransform = jointData.MeshContextLocalToGlobal;
// convert 'offsetTransformation' to H1Transform
H1SkeletalContext.Transformation offsetTransformation = jointData.OffsetTransformation;
H1Transform offsetTransform = new H1Transform();
offsetTransform.Translation = offsetTransformation.Translation;
offsetTransform.Rotation = offsetTransformation.Rotation;
offsetTransform.Scaling = offsetTransformation.Scaling;
// apply meshContextLocalToGlobal
Matrix result = Matrix.Multiply(Matrix.Invert(meshContextLocalToGlobalTransform.Transformation), offsetTransform.Transformation);
Vector3 resultTranslation;
Vector3 resultScaling;
Quaternion resultRotation;
result.Decompose(out resultScaling, out resultRotation, out resultTranslation);
offsetTransform.Translation = resultTranslation;
offsetTransform.Rotation = resultRotation;
offsetTransform.Scaling = resultScaling;
boneOffsetTransforms.Last().BoneOffsetTransforms.Add(offsetTransform);
}
}
// construct parent index for H1MeshBoneInfo
foreach (H1MeshBoneInfo meshBoneInfo in refSkeleton.RefBoneInfoList)
{
if (meshBoneInfo.ParentIndex == -1) // not handling root node case
{
continue;
}
String parentName = jointNodes[meshBoneInfo.ParentIndex].JointName;
meshBoneInfo.ParentIndex = refSkeleton.RefBoneInfoList.FindIndex(x =>
{
return(x.Name == parentName);
});
}
// @TODO - handle multiple offset transformations
// set offset matrix
Int32 currBoneIndex = 0;
foreach (H1MeshBoneInfo meshBoneInfo in refSkeleton.RefBoneInfoList)
{
// add to global offset transform
H1Transform globalOffsetTransform = boneOffsetTransforms[currBoneIndex].BoneOffsetTransforms.Count > 0 ? boneOffsetTransforms[currBoneIndex].BoneOffsetTransforms[0] : new H1Transform();
refSkeleton.RefOffsetBases.Add(globalOffsetTransform);
currBoneIndex++;
}
return(staticLODModel);
}
public Boolean ProcessAssetContext(H1StaticLODModel staticLODModel, H1MeshContext[] meshContexts, H1SkeletalContext skeletalContext)
{
if (m_Skeleton == null)
{
return(false);
}
// 1. process skeletalContext (H1SkeletalContext)
H1SkeletalContext.JointNode rootNode = skeletalContext.Root;
H1ReferenceSkeleton refSkeleton = m_Skeleton.RefSkeleton;
#region Disabled
// process recursively from root node
//Dictionary<String, H1SkeletalContext.JointNode> mapNodeNameToJointNode = new Dictionary<string, H1SkeletalContext.JointNode>();
//if (!ProcessAssetContextRecursive(rootNode, ref refSkeleton, ref mapNodeNameToJointNode))
// return false; // failed to process nodes from root nodes
#endregion
// 2. process meshContexts (H1MeshContext)
// collect all vertices for all different mesh contexts
Int32[] meshContextOffsetsList = new Int32[meshContexts.Count()];
List <Vector3> positionsList = new List <Vector3>();
List <Vector3> tangentXList = new List <Vector3>();
List <Vector3> tangentYList = new List <Vector3>();
List <Vector3> tangentZList = new List <Vector3>();
List <Vector2> texcoordsList = new List <Vector2>();
Int32 currMeshContextIndex = 0;
foreach (H1MeshContext meshContext in meshContexts)
{
meshContextOffsetsList[currMeshContextIndex] = positionsList.Count;
positionsList.AddRange(meshContext.Positions);
tangentXList.AddRange(meshContext.Tangents);
tangentYList.AddRange(meshContext.Normals);
tangentZList.AddRange(meshContext.BiTangents);
texcoordsList.AddRange(meshContext.UVBuffers[0].Buffer);
currMeshContextIndex++;
}
Vector3[] positions = positionsList.ToArray();
Vector3[] tangentX = tangentXList.ToArray();
Vector3[] tangentY = tangentYList.ToArray();
Vector3[] tangentZ = tangentZList.ToArray();
Vector2[] texcoords = texcoordsList.ToArray();
Int32 numPositions = positions.Count();
if (numPositions != texcoords.Count())
{
return(false);
}
// create the list of vertex info
List <VertexInfo> vertexInfoList = new List <VertexInfo>();
#if DEBUG
List <Boolean> taggedVertexInfoList = new List <Boolean>();
#endif
for (Int32 i = 0; i < numPositions; ++i)
{
vertexInfoList.Add(new VertexInfo());
vertexInfoList[i].VertexIndex = i;
#if DEBUG
taggedVertexInfoList.Add(false);
#endif
}
// set the triangle index
// create collection of index for all mesh contexts
List <UInt32> indexList = new List <UInt32>();
Int32 meshContextIndex = 0;
foreach (H1MeshContext meshContext in meshContexts)
{
// using meshContextOffsetsList information, remap indices correctly
foreach (UInt32 vertexIndex in meshContext.Indices)
{
indexList.Add(Convert.ToUInt32(meshContextOffsetsList[meshContextIndex]) + vertexIndex);
}
meshContextIndex++;
}
UInt32[] indices = indexList.ToArray();
#if DEBUG
Boolean[] taggedIndices = new Boolean[indexList.Count];
#endif
// looping index, set triangle index for each vertexInfoList
Int32 indexOfIndex = 0;
foreach (UInt32 index in indices)
{
Int32 vertexIndex = Convert.ToInt32(index);
Int32 triangleIndex = indexOfIndex / 3;
// set the triangle index
vertexInfoList[vertexIndex].TriangleIndices.Add(triangleIndex);
#if DEBUG
taggedIndices[indexOfIndex] = false;
#endif
indexOfIndex++;
}
// process vertex weights and bone index in advance by looping all H1MeshBoneInfo
Int32 meshBoneInfoIndex = 0;
foreach (H1MeshBoneInfo meshBoneInfo in refSkeleton.RefBoneInfoList)
{
Int32 jointNodeIndex = skeletalContext.JointNodes.FindIndex(x => x.JointName == meshBoneInfo.Name);
H1SkeletalContext.JointNode node = skeletalContext.JointNodes[jointNodeIndex];
foreach (H1SkeletalContext.Joint nodeData in node.JointDataList)
{
// looping weighted vertices
Int32 vertexIndexOffset = nodeData.MeshContextIndex == -1 ? 0 : meshContextOffsetsList[nodeData.MeshContextIndex];
// process vertex weights and bone index
foreach (H1SkeletalContext.WeightedVertex weightedVertex in nodeData.WeightedVertices)
{
VertexInfo.InfluenceBoneData influencedBoneData = new VertexInfo.InfluenceBoneData();
influencedBoneData.BoneIndex = meshBoneInfoIndex;
influencedBoneData.BoneWeight = weightedVertex.Weight;
vertexInfoList[vertexIndexOffset + weightedVertex.VertexIndex].InfluencedBones.Add(influencedBoneData);
}
}
meshBoneInfoIndex++;
}
#if DEBUG
// verification code for vertex weights
List <float> taggedVertexWeights = new List <float>();
foreach (VertexInfo vertexInfo in vertexInfoList)
{
float totalWeight = 0.0f;
foreach (VertexInfo.InfluenceBoneData influencedBoneData in vertexInfo.InfluencedBones)
{
totalWeight += influencedBoneData.BoneWeight;
}
taggedVertexWeights.Add(totalWeight);
}
List <Int32> invalidVertexIndices = new List <Int32>();
Int32 currVertexIndex = 0;
foreach (float totalWeight in taggedVertexWeights)
{
if (totalWeight < 0.99f)
{
invalidVertexIndices.Add(currVertexIndex);
}
currVertexIndex++;
}
if (invalidVertexIndices.Count > 0)
{
return(false);
}
#endif
// looping meshBoneInfo, set bone index and bone weight
foreach (H1MeshBoneInfo meshBoneInfo in refSkeleton.RefBoneInfoList)
{
Int32 jointNodeIndex = skeletalContext.JointNodes.FindIndex(x => x.JointName == meshBoneInfo.Name);
H1SkeletalContext.JointNode node = skeletalContext.JointNodes[jointNodeIndex];
List <UInt32> ChunkVertexIndices = new List <UInt32>(); // vertex indices for this chunk (bone node)
foreach (H1SkeletalContext.Joint nodeData in node.JointDataList)
{
// looping weighted vertices
Int32 vertexIndexOffset = nodeData.MeshContextIndex == -1 ? 0 : meshContextOffsetsList[nodeData.MeshContextIndex];
// add chunk vertex indices
foreach (H1SkeletalContext.WeightedVertex weightedVertex in nodeData.WeightedVertices)
{
ChunkVertexIndices.Add(Convert.ToUInt32(vertexIndexOffset + weightedVertex.VertexIndex));
}
}
// exceptional handling for MeshBoneInfo which doesn't contain any mesh data, no need to generate chunk for this BasePose
if (ChunkVertexIndices.Count == 0)
{
continue;
}
// process skeletal mesh chunk
H1SkelMeshChunk skelMeshChunk = new H1SkelMeshChunk();
// calculate triangles for this mesh chunk
List <UInt32> triangles = new List <UInt32>();
foreach (Int32 vertexIndex in ChunkVertexIndices)
{
VertexInfo vertexInfo = vertexInfoList[vertexIndex];
H1SoftSkinVertex newSoftSkinVertex = new H1SoftSkinVertex();
newSoftSkinVertex.Position = positions[vertexInfo.VertexIndex];
newSoftSkinVertex.TangentX = tangentX[vertexInfo.VertexIndex];
newSoftSkinVertex.TangentY = tangentY[vertexInfo.VertexIndex];
newSoftSkinVertex.TangentZ = tangentZ[vertexInfo.VertexIndex];
// @TODO - in the future, it could increase texcoords (ex. light map texcoord)
newSoftSkinVertex.UVs[0] = texcoords[vertexInfo.VertexIndex];
for (Int32 i = 0; i < H1ObjectGlobalDefinitions.MAX_TOTAL_INFLUENCES; ++i)
{
if (vertexInfo.InfluencedBones.Count <= i)
{
// insert the default value
newSoftSkinVertex.InfluenceWeights[i] = 0;
newSoftSkinVertex.InfluenceBones[i] = 0;
continue;
}
VertexInfo.InfluenceBoneData boneData = vertexInfo.InfluencedBones[i];
newSoftSkinVertex.InfluenceWeights[i] = Convert.ToByte(boneData.BoneWeight * 255.0f);
// @TODO - for this bone index, we can replace with 'm_BoneMap'
newSoftSkinVertex.InfluenceBones[i] = Convert.ToByte(boneData.BoneIndex);
}
skelMeshChunk.SoftVertices.Add(newSoftSkinVertex);
// process triangle indices
foreach (Int32 triangleIndex in vertexInfo.TriangleIndices)
{
UInt32 triangleIndexUInt32 = Convert.ToUInt32(triangleIndex);
if (!triangles.Exists(x => { return(x == triangleIndexUInt32); }))
{
triangles.Add(triangleIndexUInt32);
}
}
}
// build vertex buffers
List <Vector4> chunkPositions = new List <Vector4>();
List <Vector4> chunkTangentZs = new List <Vector4>();
List <Vector4> chunkTangentXs = new List <Vector4>();
List <Vector2> chunkTexcoords = new List <Vector2>();
List <Int4> chunkBoneIndices = new List <Int4>();
List <Vector4> chunkBoneWeights = new List <Vector4>();
List <Vector4> chunkColors = new List <Vector4>();
Dictionary <Int32, Int32> vertexToChunkVertexMap = new Dictionary <Int32, Int32>();
foreach (Int32 triangleIndex in triangles)
{
for (Int32 faceIndex = 0; faceIndex < 3; ++faceIndex)
{
Int32 vertexIndex = Convert.ToInt32(indices[triangleIndex * 3 + faceIndex]);
#if DEBUG
taggedVertexInfoList[vertexIndex] = true;
#endif
// determine if the same vertex exists based on chunkPositions
//if (chunkPositions.Contains(new Vector4(positions[vertexIndex], 1.0f)))
if (vertexToChunkVertexMap.ContainsKey(vertexIndex))
{
continue;
}
// position index is base-index
Int32 newIndex = chunkPositions.Count;
vertexToChunkVertexMap.Add(vertexIndex, newIndex);
chunkPositions.Add(new Vector4(positions[vertexIndex], 1.0f));
chunkTangentZs.Add(new Vector4(tangentZ[vertexIndex], 1.0f));
chunkTangentXs.Add(new Vector4(tangentX[vertexIndex], 1.0f));
chunkTexcoords.Add(new Vector2(texcoords[vertexIndex].X, texcoords[vertexIndex].Y));
VertexInfo vertexInfo = vertexInfoList[vertexIndex];
Int4 influencedBones = new Int4(0);
Vector4 influencedWeights = new Vector4(0.0f);
Int32 insertedIndex = 0;
foreach (VertexInfo.InfluenceBoneData boneData in vertexInfo.InfluencedBones)
{
influencedBones[insertedIndex] = boneData.BoneIndex;
influencedWeights[insertedIndex] = boneData.BoneWeight;
insertedIndex++;
}
chunkBoneIndices.Add(influencedBones);
chunkBoneWeights.Add(influencedWeights);
//@TODO - temporary set it as 'RED'
chunkColors.Add(new Vector4(1.0f, 0.0f, 0.0f, 1.0f));
}
}
// create skeletal mesh vertex data
// 1. position
H1SkeletalMeshVertexData <Vector4> positionVertexData = new H1SkeletalMeshVertexData <Vector4>();
positionVertexData.SetVertexData(chunkPositions.ToArray(), H1SkeletalMeshVertexDataInterface.VertexDataType.Position, false);
// 2. tangentZ
H1SkeletalMeshVertexData <Vector4> tangentZVertexData = new H1SkeletalMeshVertexData <Vector4>();
tangentZVertexData.SetVertexData(chunkTangentZs.ToArray(), H1SkeletalMeshVertexDataInterface.VertexDataType.TangentZ, false);
// 3. tangentX
H1SkeletalMeshVertexData <Vector4> tangentXVertexData = new H1SkeletalMeshVertexData <Vector4>();
tangentXVertexData.SetVertexData(chunkTangentXs.ToArray(), H1SkeletalMeshVertexDataInterface.VertexDataType.TangentX, false);
// 4. bone indices
H1SkeletalMeshVertexData <Int4> boneIndicesVertexData = new H1SkeletalMeshVertexData <Int4>();
boneIndicesVertexData.SetVertexData(chunkBoneIndices.ToArray(), H1SkeletalMeshVertexDataInterface.VertexDataType.InfluencedBones, false);
// 5. bone weights
H1SkeletalMeshVertexData <Vector4> boneWeightsVertexData = new H1SkeletalMeshVertexData <Vector4>();
boneWeightsVertexData.SetVertexData(chunkBoneWeights.ToArray(), H1SkeletalMeshVertexDataInterface.VertexDataType.InfluencedWeights, false);
// 6. texcoord
H1SkeletalMeshVertexData <Vector2> texcoordVertexData = new H1SkeletalMeshVertexData <Vector2>();
texcoordVertexData.SetVertexData(chunkTexcoords.ToArray(), H1SkeletalMeshVertexDataInterface.VertexDataType.Texcoord, false);
// 7. colors
H1SkeletalMeshVertexData <Vector4> colorVertexData = new H1SkeletalMeshVertexData <Vector4>();
colorVertexData.SetVertexData(chunkColors.ToArray(), H1SkeletalMeshVertexDataInterface.VertexDataType.Color);
Int32 newSkelMeshChunkIndex = staticLODModel.VertexBufferGPUSkin.SkeletalMeshVertexBuffers.Count;
staticLODModel.VertexBufferGPUSkin.SkeletalMeshVertexBuffers.Add(new H1SkeletalMeshVertexBuffers(newSkelMeshChunkIndex));
staticLODModel.VertexBufferGPUSkin.SkeletalMeshVertexBuffers[newSkelMeshChunkIndex].AddSkeletalMeshVertexData(positionVertexData);
staticLODModel.VertexBufferGPUSkin.SkeletalMeshVertexBuffers[newSkelMeshChunkIndex].AddSkeletalMeshVertexData(tangentZVertexData);
staticLODModel.VertexBufferGPUSkin.SkeletalMeshVertexBuffers[newSkelMeshChunkIndex].AddSkeletalMeshVertexData(tangentXVertexData);
staticLODModel.VertexBufferGPUSkin.SkeletalMeshVertexBuffers[newSkelMeshChunkIndex].AddSkeletalMeshVertexData(boneIndicesVertexData);
staticLODModel.VertexBufferGPUSkin.SkeletalMeshVertexBuffers[newSkelMeshChunkIndex].AddSkeletalMeshVertexData(boneWeightsVertexData);
staticLODModel.VertexBufferGPUSkin.SkeletalMeshVertexBuffers[newSkelMeshChunkIndex].AddSkeletalMeshVertexData(texcoordVertexData);
staticLODModel.VertexBufferGPUSkin.SkeletalMeshVertexBuffers[newSkelMeshChunkIndex].AddSkeletalMeshVertexData(colorVertexData);
// build index buffer
List <UInt32> chunkIndices = new List <UInt32>();
foreach (Int32 triangleIndex in triangles)
{
for (Int32 faceIndex = 0; faceIndex < 3; ++faceIndex)
{
#if DEBUG
taggedIndices[triangleIndex * 3 + faceIndex] = true;
#endif
Int32 vertexIndex = Convert.ToInt32(indices[triangleIndex * 3 + faceIndex]);
chunkIndices.Add(Convert.ToUInt32(vertexToChunkVertexMap[vertexIndex]));
}
}
staticLODModel.MultiSizeIndexContainer.Indices.AddRange(chunkIndices.ToArray());
// add new chunk
Int32 newChunkIndex = staticLODModel.Chunks.Count;
staticLODModel.Chunks.Add(skelMeshChunk);
// process skeletal mesh section
H1SkelMeshSection skelMeshSection = new H1SkelMeshSection();
skelMeshSection.ChunkIndex = Convert.ToUInt16(newChunkIndex);
// @TODO - fix this num triangle inconsistency
//skelMeshSection.NumTriangles = Convert.ToUInt16(triangles.Count);
skelMeshSection.NumTriangles = Convert.ToUInt16(chunkIndices.Count / 3);
//@TODO - add material index
// add skeletal sections
staticLODModel.Sections.Add(skelMeshSection);
}
#if DEBUG
// debugging code for detecting missing vertex to draw meshes
List <Int32> notTaggedVertexIndex = new List <Int32>();
Int32 currTaggedVertexIndex = 0;
foreach (Boolean isTaggedVertex in taggedVertexInfoList)
{
if (isTaggedVertex == false)
{
notTaggedVertexIndex.Add(currTaggedVertexIndex);
}
currTaggedVertexIndex++;
}
if (notTaggedVertexIndex.Count > 0)
{
return(false);
}
// debugging code for detecting missing index to draw meshes
List <Int32> notTaggedIndex = new List <Int32>();
Int32 currIndexOfIndex = 0;
foreach (Boolean isTaggedIndex in taggedIndices)
{
if (isTaggedIndex == false)
{
notTaggedIndex.Add(currIndexOfIndex);
}
currIndexOfIndex++;
}
if (notTaggedIndex.Count > 0)
{
return(false);
}
#endif
return(true);
}
public bool Load(String fileName)
{
// @TODO - change the file path for asset folder in the future currently, set as executable path
String path = Path.Combine(Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location), "Assets\\");
m_FileName = path + fileName;
// setting assimp context
AssimpContext importer = new AssimpContext();
importer.SetConfig(new NormalSmoothingAngleConfig(66.0f));
// loading scene
Scene scene = null;
try
{
scene = importer.ImportFile(m_FileName, PostProcessPreset.TargetRealTimeMaximumQuality | PostProcessSteps.Triangulate | PostProcessSteps.FlipUVs | PostProcessSteps.FlipWindingOrder);
}
catch (Exception e) // handling assimp exception
{
if (e.Source != null)
{
Console.WriteLine("Error: {0}", e.Message);
}
}
asset = new H1AssetContext();
H1ModelContext convertedModel = asset.AddModel();
// extract the meshes
if (scene.HasMeshes)
{
Int32 meshCount = scene.Meshes.Count;
List <H1MeshContext> meshContexts = new List <H1MeshContext>();
ExtractMeshData(scene, ref meshContexts);
foreach (H1MeshContext meshContext in meshContexts)
{
convertedModel.Meshes.Add(meshContext);
}
}
// extract skeletal data
// what I learned from this failed algorithm
// 1. root bone nodes can be multiple
// 2. for example, blabla_Hub(containing null meshes, only space infos) have null information for weighted vertices, but it should not be considered as leaf node!
#region Disabled Extracting skeletal mesh data methods
/*if (scene.HasMeshes)
* {
* // collect all bones from meshes
* List<Bone> bones = new List<Bone>();
* foreach (Mesh mesh in scene.Meshes)
* {
* if (mesh.HasBones)
* {
* bones.AddRange(mesh.Bones);
* }
* }
*
* // find root node for all meshes
* Node boneRootNode = FindRootBone(bones, scene.RootNode);
*
* H1SkeletalContext skeletalContext = null;
* skeletalContext = new H1SkeletalContext();
* //@TODO - need to optimize for deep copies
* ExtractSkeletalMeshData(boneRootNode, bones, ref skeletalContext);
*
* convertedModel.SkeletalContexts.Add(skeletalContext);
* }*/
#endregion
// what I learned from this failed algorithm
// 1. the counts of bones and bone nodes (joint nodes) can be different
// 2. bone node can be used for just transforming spaces
// 3. bone node could have empty meshes (just includes space information)
// 4. bones are subsidiary for bone nodes
// 5. don't consider aiBone as bone node in hierarchy rather regards node(aiNode) as bone node in hierarchy
// 6. consider aiBone as node bone data containing all necessary data
#region Failed Algorithm
// new algorithms to handle multiple root node (like pelvis and head) more efficient way
/*if (scene.HasMeshes)
* {
* // 1. extracted all bones for all meshes in the scene
* // NOTICE - multiple meshes in file are considered in same body but chunked several parts
* Dictionary<String, Bone> extractedBones = new Dictionary<String, Bone>();
* Dictionary<String, H1SkeletalContext.JointNode> jointNodes = new Dictionary<string, H1SkeletalContext.JointNode>();
* foreach (Mesh mesh in scene.Meshes)
* {
* if (mesh.HasBones)
* {
* foreach (Bone bone in mesh.Bones)
* {
* String boneName = bone.Name;
* if (!extractedBones.ContainsKey(boneName))
* {
* extractedBones.Add(boneName, bone);
*
* H1SkeletalContext.JointNode newJointNode = new H1SkeletalContext.JointNode();
* newJointNode.JointData.JointName = boneName;
* jointNodes.Add(boneName, newJointNode);
* }
* }
* }
* }
*
* // 2. process extracted bones
* // @TODO - naive algorithm need to optimize by searching tree and set the bones parent
* foreach (KeyValuePair<String, Bone> extractedBone in extractedBones)
* {
* Node node = scene.RootNode.FindNode(extractedBone.Key);
* H1SkeletalContext.JointNode jointNode = jointNodes[node.Name];
* H1SkeletalContext.JointNode parentJointNode = jointNodes[node.Parent.Name];
*
* // set proper properties
* jointNode.Parent = parentJointNode;
* foreach (Node child in node.Children)
* {
* H1SkeletalContext.JointNode childJointNode = null;
* if (jointNodes.TryGetValue(child.Name, out childJointNode))
* {
* jointNode.Children.Add(childJointNode);
* }
* }
* ExtractBone(extractedBone.Value, ref jointNode.JointData);
* }
*
* // 3. find root node(s) and set them at the front
* }*/
#endregion
if (scene.HasMeshes)
{
H1SkeletalContext skeletalContext = null;
skeletalContext = new H1SkeletalContext();
// prepare data for BFS search
List <H1SkeletalContext.JointNode> jointNodes = skeletalContext.JointNodes;
Dictionary <String, Int32> jointNameToJointNodeIndex = new Dictionary <String, Int32>();
// extractedBones could have same bone name and multiple bone data
Dictionary <String, List <Bone> > extractedBones = new Dictionary <String, List <Bone> >();
// boneToMeshContexIndex should be mirrored same as extractedBones (index of list should be same)
Dictionary <String, List <Int32> > boneToMeshContextIndex = new Dictionary <String, List <Int32> >();
#region Debug Validation Weight Vertex Counts
#if DEBUG
List <Boolean> taggedVertexIndex = new List <Boolean>(); // verification to tag all needed vertices
List <float> taggedVertexWeights = new List <float>(); // verification to tag all vertex weight for sum of each vertex
List <Int32> taggedVertexIndexOffset = new List <Int32>();
// pre-test for validation
foreach (Mesh mesh in scene.Meshes)
{
if (mesh.HasVertices)
{
foreach (Vector3D vertex in mesh.Vertices)
{
taggedVertexIndex.Add(false);
}
}
if (mesh.HasBones)
{
foreach (Bone bone in mesh.Bones)
{
if (bone.HasVertexWeights)
{
foreach (VertexWeight vertexWeight in bone.VertexWeights)
{
taggedVertexIndex[vertexWeight.VertexID] = true;
}
}
}
}
List <Int32> notTaggedVertexIndex0 = new List <Int32>();
Int32 currVertexIndex0 = 0;
foreach (Boolean isTagged in taggedVertexIndex)
{
if (isTagged == false)
{
notTaggedVertexIndex0.Add(currVertexIndex0);
}
currVertexIndex0++;
}
if (notTaggedVertexIndex0.Count > 0)
{
return(false);
}
taggedVertexIndex.Clear();
}
#endif
#endregion
Int32 validMeshContextIndex = 0;
foreach (Mesh mesh in scene.Meshes)
{
if (mesh.HasVertices &&
mesh.HasNormals &&
mesh.HasTangentBasis &&
mesh.TextureCoordinateChannels[0].Count > 0 &&
mesh.HasFaces) // process vertices in the mesh
{
if (mesh.HasBones)
{
foreach (Bone bone in mesh.Bones)
{
String boneName = bone.Name;
if (!extractedBones.ContainsKey(boneName))
{
// add new list of bone list
extractedBones.Add(boneName, new List <Bone>());
extractedBones[boneName].Add(bone);
// add new list of mesh context index
boneToMeshContextIndex.Add(boneName, new List <Int32>());
boneToMeshContextIndex[boneName].Add(validMeshContextIndex);
}
else // same bone name, but different bone data exists
{
// no need to create list of data, just add new item
// bone data could have different set of weighted vertices, but with same bone name
extractedBones[boneName].Add(bone);
boneToMeshContextIndex[boneName].Add(validMeshContextIndex);
}
}
validMeshContextIndex++;
#region Debug Validation Weight Vertex Count
#if DEBUG
taggedVertexIndexOffset.Add(taggedVertexIndex.Count);
for (Int32 i = 0; i < mesh.VertexCount; ++i)
{
taggedVertexIndex.Add(false);
taggedVertexWeights.Add(0.0f);
}
#endif
#endregion
}
}
}
// BFS search to construct bone data
Stack <Node> nodes = new Stack <Node>();
nodes.Push(scene.RootNode);
while (nodes.Count != 0)
{
Node currNode = nodes.Pop();
H1SkeletalContext.JointNode jointNode = new H1SkeletalContext.JointNode();
H1SkeletalContext.JointNode parentJointNode = jointNodes.Find(x => (x.JointName == currNode.Parent.Name));
jointNode.Parent = parentJointNode;
ExtractNodeSpace(currNode, ref jointNode);
List <Bone> boneDataList = null;
List <Int32> meshContextIndexList = null;
if (extractedBones.TryGetValue(jointNode.JointName, out boneDataList))
{
meshContextIndexList = boneToMeshContextIndex[jointNode.JointName];
// looping bone data list, extract bone data
Int32 currBoneIndex = 0;
foreach (Bone bone in boneDataList)
{
H1SkeletalContext.Joint newJointData = new H1SkeletalContext.Joint();
ExtractBone(bone, ref newJointData);
newJointData.MeshContextIndex = meshContextIndexList[currBoneIndex];
currBoneIndex++;
// store mesh context local-to-global H1Transform for later transformation of offsetMatrix for animation
newJointData.MeshContextLocalToGlobal = convertedModel.Meshes[newJointData.MeshContextIndex].LocalToGlobalTransform;
// add new joint data
jointNode.JointDataList.Add(newJointData);
}
// mark this node is bone-space
jointNode.MarkedAsBoneSpace = true;
// tag its parent until it reaches the state that 'MarkedAsBoneSpace' is true
H1SkeletalContext.JointNode markNode = jointNode.Parent;
while (markNode != null && markNode.MarkedAsBoneSpace != true)
{
markNode.MarkedAsBoneSpace = true;
markNode = markNode.Parent;
}
}
else
{
// for debugging
}
foreach (Node child in currNode.Children)
{
nodes.Push(child);
// tag child names to process child nodes after BFS search
jointNode.ChildNodeNames.Add(child.Name);
}
// add new joint node
Int32 newJointNodeIndex = jointNodes.Count;
jointNodes.Add(jointNode);
jointNameToJointNodeIndex.Add(jointNode.JointName, newJointNodeIndex);
}
// process tagged child nodes
foreach (H1SkeletalContext.JointNode node in jointNodes)
{
foreach (String childName in node.ChildNodeNames)
{
node.Children.Add(jointNodes[jointNameToJointNodeIndex[childName]]);
}
}
#region Debug Validation for total weight value of weighted vertices & vertex counts
#if DEBUG
foreach (H1SkeletalContext.JointNode node in jointNodes)
{
foreach (H1SkeletalContext.Joint jointData in node.JointDataList)
{
foreach (H1SkeletalContext.WeightedVertex weightedVertex in jointData.WeightedVertices)
{
// confirm all vertices in Mesh are tagged by weighted vertices
taggedVertexIndex[taggedVertexIndexOffset[jointData.MeshContextIndex] + weightedVertex.VertexIndex] = true;
// add vertex weight to verify
taggedVertexWeights[taggedVertexIndexOffset[jointData.MeshContextIndex] + weightedVertex.VertexIndex] += weightedVertex.Weight;
}
}
}
// verification code to extract not tagged vertex index
List <Int32> notTaggedVertexIndex = new List <Int32>();
Int32 currVertexIndex = 0;
foreach (Boolean isTagged in taggedVertexIndex)
{
if (isTagged == false)
{
notTaggedVertexIndex.Add(currVertexIndex);
}
currVertexIndex++;
}
if (notTaggedVertexIndex.Count > 0)
{
return(false);
}
// verification code to extract vertex which has invalid vertex weight value
List <Int32> invalidVertexWeightVertexIndex = new List <Int32>();
currVertexIndex = 0;
foreach (float currVertexWeights in taggedVertexWeights)
{
if (currVertexWeights < 0.99f)
{
invalidVertexWeightVertexIndex.Add(currVertexIndex);
}
}
if (invalidVertexWeightVertexIndex.Count > 0)
{
return(false);
}
#endif
#endregion
convertedModel.SkeletalContexts.Add(skeletalContext);
}
// extract the animations
if (scene.HasAnimations)
{
H1AnimationContext newAnimContext = new H1AnimationContext();
for (Int32 animIndex = 0; animIndex < scene.AnimationCount; ++animIndex)
{
Animation currAnimation = scene.Animations[animIndex];
if (currAnimation.HasNodeAnimations) // we only handle node animations (not vertex animation)
{
// create new animation sequence
H1AnimationContext.AnimSequence newAnimSeq = new H1AnimationContext.AnimSequence();
newAnimSeq.AnimSeqName = currAnimation.Name;
newAnimSeq.Duration = currAnimation.DurationInTicks;
newAnimSeq.TicksPerSecond = currAnimation.TicksPerSecond;
foreach (NodeAnimationChannel animChannel in currAnimation.NodeAnimationChannels)
{
H1AnimationContext.JointAnimation newJointAnim = new H1AnimationContext.JointAnimation();
newJointAnim.BoneName = animChannel.NodeName;
// calculate maximum number of keys to fill up the special case (only holding one key)
Int32 maxNumKeys = Math.Max(Math.Max(animChannel.ScalingKeyCount, animChannel.RotationKeyCount), animChannel.PositionKeyCount);
if (animChannel.HasPositionKeys)
{
if (animChannel.PositionKeyCount == 1) // special handling (only holding one key)
{
VectorKey positionKey = animChannel.PositionKeys[0];
for (Int32 numKey = 0; numKey < maxNumKeys; ++numKey)
{
H1AnimationContext.PositionKey newPosKey = new H1AnimationContext.PositionKey();
newPosKey.Time = positionKey.Time;
newPosKey.Value = new Vector3(positionKey.Value.X, positionKey.Value.Y, positionKey.Value.Z);
newJointAnim.PosKeys.Add(newPosKey);
}
}
else
{
foreach (VectorKey positionKey in animChannel.PositionKeys)
{
H1AnimationContext.PositionKey newPosKey = new H1AnimationContext.PositionKey();
newPosKey.Time = positionKey.Time;
newPosKey.Value = new Vector3(positionKey.Value.X, positionKey.Value.Y, positionKey.Value.Z);
newJointAnim.PosKeys.Add(newPosKey);
}
}
}
if (animChannel.HasRotationKeys)
{
if (animChannel.RotationKeyCount == 1) // special handling (only holding one key)
{
QuaternionKey quatKey = animChannel.RotationKeys[0];
for (Int32 numKey = 0; numKey < maxNumKeys; ++numKey)
{
H1AnimationContext.QuaternionKey newQuatKey = new H1AnimationContext.QuaternionKey();
newQuatKey.Time = quatKey.Time;
newQuatKey.Value = new SharpDX.Quaternion(quatKey.Value.X, quatKey.Value.Y, quatKey.Value.Z, quatKey.Value.W);
newJointAnim.RotKeys.Add(newQuatKey);
}
}
else
{
foreach (QuaternionKey quatKey in animChannel.RotationKeys)
{
H1AnimationContext.QuaternionKey newQuatKey = new H1AnimationContext.QuaternionKey();
newQuatKey.Time = quatKey.Time;
newQuatKey.Value = new SharpDX.Quaternion(quatKey.Value.X, quatKey.Value.Y, quatKey.Value.Z, quatKey.Value.W);
newJointAnim.RotKeys.Add(newQuatKey);
}
}
}
if (animChannel.HasScalingKeys)
{
if (animChannel.ScalingKeyCount == 1) // special handling (only holding one key)
{
VectorKey scalingKey = animChannel.ScalingKeys[0];
for (Int32 numKey = 0; numKey < maxNumKeys; ++numKey)
{
H1AnimationContext.ScalingKey newScalingKey = new H1AnimationContext.ScalingKey();
newScalingKey.Time = scalingKey.Time;
newScalingKey.Value = new Vector3(scalingKey.Value.X, scalingKey.Value.Y, scalingKey.Value.Z);
newJointAnim.ScaleKeys.Add(newScalingKey);
}
}
else
{
foreach (VectorKey scalingKey in animChannel.ScalingKeys)
{
H1AnimationContext.ScalingKey newScalingKey = new H1AnimationContext.ScalingKey();
newScalingKey.Time = scalingKey.Time;
newScalingKey.Value = new Vector3(scalingKey.Value.X, scalingKey.Value.Y, scalingKey.Value.Z);
newJointAnim.ScaleKeys.Add(newScalingKey);
}
}
}
newAnimSeq.BoneAnimations.Add(newJointAnim);
}
newAnimContext.AnimSequences.Add(newAnimSeq);
}
}
// set the animation context
convertedModel.AnimationContext = newAnimContext;
}
return(true);
}
