Example #1
0
        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);
        }
Example #2
0
        public Boolean ProcessAssetContextRecursive(H1SkeletalContext.JointNode node, ref H1ReferenceSkeleton refSkeleton, ref Dictionary <String, H1SkeletalContext.JointNode> mapBoneNameToBoneNode)
        {
            if (node == null) // successfully reach to the leaf nodes
            {
                return(true);
            }

            if (!ProcessRefSkeletonFromAssetContext(node, ref refSkeleton))
            {
                return(false);
            }

            // add pair for BoneNameToBoneNode
            mapBoneNameToBoneNode.Add(node.JointName, node);

            foreach (H1SkeletalContext.JointNode child in node.Children)
            {
                if (!ProcessAssetContextRecursive(child, ref refSkeleton, ref mapBoneNameToBoneNode))
                {
                    return(false);
                }
            }

            return(true);
        }
Example #3
0
        public Boolean ProcessRefSkeletonFromAssetContext(H1SkeletalContext.JointNode node, ref H1ReferenceSkeleton refSkeleton)
        {
            H1SkeletalContext.Joint jointData = null; // node.JointData;

            // add mesh bone info
            H1MeshBoneInfo meshBoneInfo = new H1MeshBoneInfo();

            //meshBoneInfo.Name = jointData.JointName;

            if (refSkeleton.NameToIndexMapIsEmpty())
            {
                // should be root node, so parent index is '0'
                meshBoneInfo.ParentIndex = 0;
            }
            else if (node.Parent == null)
            {
                // should be sub-root node, so parent index is '0' (root motion node)
                meshBoneInfo.ParentIndex = refSkeleton.GetIndexByBoneName("RootMotionNode");
            }
            else
            //meshBoneInfo.ParentIndex = refSkeleton.GetIndexByBoneName(node.Parent.JointData.JointName);

            if (meshBoneInfo.ParentIndex == -1)
            {
                return(false);
            }

            // the new index should be same with RefBoneBases
            Int32 newBoneInfoIndex = refSkeleton.RefBoneInfoList.Count;
            Int32 newBoneBaseIndex = refSkeleton.RefBoneBases.Count;

            if (newBoneBaseIndex != newBoneInfoIndex)
            {
                return(false);
            }

            refSkeleton.RefBoneInfoList.Add(meshBoneInfo);

            // add bone base
            H1Transform boneBase = new H1Transform();

            boneBase.Translation = jointData.OffsetTransformation.Translation;
            boneBase.Scaling     = jointData.OffsetTransformation.Scaling;
            boneBase.Rotation    = jointData.OffsetTransformation.Rotation;

            refSkeleton.RefBoneBases.Add(boneBase);

            // add NameToIndex
            refSkeleton.AddNameToIndexPair(meshBoneInfo.Name, newBoneInfoIndex);

            return(true);
        }
Example #4
0
        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);
        }