// @TODO - temporary processing animation context, need to think about where to put this functionality
public Boolean ProcessAnimationContext(H1AnimationContext animContext)
{
H1AnimMontage montage = new H1AnimMontage();
foreach (H1AnimationContext.AnimSequence animSeq in animContext.AnimSequences)
{
String animSeqName = animSeq.AnimSeqName;
float duration = Convert.ToSingle(animSeq.Duration);
float tickInSec = Convert.ToSingle(animSeq.TicksPerSecond);
// @TODO - temporary insert duration variable
Duration = duration;
TickInSec = tickInSec;
foreach (H1AnimationContext.JointAnimation jointAnimation in animSeq.BoneAnimations)
{
String boneName = jointAnimation.BoneName;
H1SlotAnimationTrack slotAnimationTrack = new H1SlotAnimationTrack();
slotAnimationTrack.SlotName = boneName;
slotAnimationTrack.AnimTrackRef = new H1AnimTrack();
H1AnimSegment animSegment = new H1AnimSegment();
H1AnimSequence animSequence = new H1AnimSequence();
// 1. process position keys
animSequence.TranslationTracks.Add(new H1TranslationTrack());
foreach (H1AnimationContext.PositionKey positionKey in jointAnimation.PosKeys)
{
animSequence.TranslationTracks[0].PosKeys.Add(positionKey.Value);
animSequence.TranslationTracks[0].Times.Add(Convert.ToSingle(positionKey.Time));
}
// 2. process rotation keys
animSequence.RotationTracks.Add(new H1RotationTrack());
foreach (H1AnimationContext.QuaternionKey quaternionKey in jointAnimation.RotKeys)
{
animSequence.RotationTracks[0].RotKeys.Add(quaternionKey.Value);
animSequence.RotationTracks[0].Times.Add(Convert.ToSingle(quaternionKey.Time));
}
// 3. process scale keys
animSequence.ScaleTracks.Add(new H1ScalingTrack());
foreach (H1AnimationContext.ScalingKey scaleKey in jointAnimation.ScaleKeys)
{
animSequence.ScaleTracks[0].ScaleKeys.Add(scaleKey.Value);
animSequence.ScaleTracks[0].Times.Add(Convert.ToSingle(scaleKey.Time));
}
animSegment.SetAnimSequence(animSequence);
slotAnimationTrack.AnimTrackRef.AnimSegments.Add(animSegment);
montage.SlotAnimTracks.Add(slotAnimationTrack);
}
}
H1AnimMontageInstance montageInstance = new H1AnimMontageInstance();
montageInstance.MontageRef = montage;
m_MontageInstances.Add(montageInstance);
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);
}