protected FbxNode CreateSkeleton(FbxScene scene)
{
FbxSkeleton skelRoot = FbxSkeleton.Create(scene, "SkelRoot");
skelRoot.SetSkeletonType(FbxSkeleton.EType.eRoot);
FbxNode skelRootNode = FbxNode.Create(scene, "SkelRootNode");
skelRootNode.SetNodeAttribute(skelRoot);
skelRootNode.LclTranslation.Set(new FbxDouble3(0.0, -40.0, 0.0));
// create skeleton limb nodes
FbxSkeleton skelLimb1 = FbxSkeleton.Create(scene, "SkelLimb1");
skelLimb1.SetSkeletonType(FbxSkeleton.EType.eLimbNode);
skelLimb1.Size.Set(1.5);
FbxNode skelLimbNode1 = FbxNode.Create(scene, "SkelLimbNode1");
skelLimbNode1.SetNodeAttribute(skelLimb1);
skelLimbNode1.LclTranslation.Set(new FbxDouble3(0.0, 40.0, 0.0));
FbxSkeleton skelLimb2 = FbxSkeleton.Create(scene, "SkelLimb2");
skelLimb2.SetSkeletonType(FbxSkeleton.EType.eLimbNode);
skelLimb2.Size.Set(1.5);
FbxNode skelLimbNode2 = FbxNode.Create(scene, "SkelLimbNode2");
skelLimbNode2.SetNodeAttribute(skelLimb2);
skelLimbNode2.LclTranslation.Set(new FbxDouble3(0.0, 40.0, 0.0));
// build skeleton hierarchy
skelRootNode.AddChild(skelLimbNode1);
skelLimbNode1.AddChild(skelLimbNode2);
return(skelRootNode);
}
public DsBoneData(DsBone bone, FLVER.Bone flverBone, FbxScene scene)
{
FbxSkeleton fbxBone = FbxSkeleton.Create(scene, bone.Name + "Bone");
fbxBone.SetSkeletonType(flverBone.ChildIndex >= 0 ? FbxSkeleton.EType.eLimbNode : FbxSkeleton.EType.eEffector);
fbxBone.Size.Set(flverBone.Translation.Length());
exportData = fbxBone.CreateExportDataWithScene(bone, scene);
this.flverBone = flverBone;
}
public FbxNode CreateSkeleton(List <FMeshBoneInfo> boneInfos, ref List <FbxNode> BoneNodes)
{
if (boneInfos == null || boneInfos.Count == 0)
{
return(null);
}
for (int BoneIndex = 0; BoneIndex < boneInfos.Count; BoneIndex++)
{
FMeshBoneInfo CurrentBone = boneInfos[BoneIndex];
FbxSkeleton SkeletonAttribute = FbxSkeleton.Create(Scene, CurrentBone.Name);
if (BoneIndex != 0)
{
SkeletonAttribute.SetSkeletonType(FbxSkeleton.EType.eLimbNode);
//SkeletonAttribute.Size.Set(1.0);
}
else
{
SkeletonAttribute.SetSkeletonType(FbxSkeleton.EType.eRoot);
//SkeletonAttribute.Size.Set(1.0);
}
// Create the node
FbxNode BoneNode = FbxNode.Create(Scene, CurrentBone.Name);
BoneNode.SetNodeAttribute(SkeletonAttribute);
FbxDouble3 LocalPos = FbxDataConverter.ConvertToFbxPos(CurrentBone.BoneTransform.position);
FbxDouble3 LocalRot = FbxDataConverter.ConvertToFbxRot(CurrentBone.BoneTransform.rotation);
FbxDouble3 LocalScale = FbxDataConverter.ConvertToFbxScale(CurrentBone.BoneTransform.scale);
BoneNode.LclTranslation.Set(LocalPos);
BoneNode.LclRotation.Set(LocalRot);
BoneNode.LclScaling.Set(LocalScale);
if (BoneIndex != 0)
{
BoneNodes[CurrentBone.ParentIndex].AddChild(BoneNode);
}
BoneNodes.Add(BoneNode);
}
return(BoneNodes[0]);
}
/// <summary>
/// Export bones of skinned mesh, if this is a skinned mesh with
/// bones and bind poses.
/// </summary>
private bool ExportSkeleton(GameObject unityGo, FbxScene fbxScene)
{
var unitySkinnedMeshRenderer = unityGo.GetComponentInChildren <SkinnedMeshRenderer> ();
if (!unitySkinnedMeshRenderer)
{
return(false);
}
var bones = unitySkinnedMeshRenderer.bones;
if (bones == null || bones.Length == 0)
{
return(false);
}
var mesh = unitySkinnedMeshRenderer.sharedMesh;
if (!mesh)
{
return(false);
}
var bindPoses = mesh.bindposes;
if (bindPoses == null || bindPoses.Length != bones.Length)
{
return(false);
}
// Three steps:
// 0. Set up the map from bone to index.
// 1. Create the bones, in arbitrary order.
// 2. Connect up the hierarchy.
// 3. Set the transforms.
// Step 0 supports step 1 (finding which is the root bone) and step 3
// (setting up transforms; the complication is the use of pivots).
// Step 0: map transform to index so we can look up index by bone.
Dictionary <Transform, int> index = new Dictionary <Transform, int>();
for (int boneIndex = 0, n = bones.Length; boneIndex < n; boneIndex++)
{
Transform unityBoneTransform = bones [boneIndex];
index[unityBoneTransform] = boneIndex;
}
// Step 1: create the bones.
for (int boneIndex = 0, n = bones.Length; boneIndex < n; boneIndex++)
{
Transform unityBoneTransform = bones [boneIndex];
// Create the bone node if we haven't already. Parent it to
// its corresponding parent, or to the scene if there is none.
FbxNode fbxBoneNode;
if (!MapUnityObjectToFbxNode.TryGetValue(unityBoneTransform.gameObject, out fbxBoneNode))
{
var unityParent = unityBoneTransform.parent;
FbxNode fbxParent;
if (MapUnityObjectToFbxNode.TryGetValue(unityParent.gameObject, out fbxParent))
{
fbxBoneNode = FbxNode.Create(fbxParent, unityBoneTransform.name);
}
else
{
fbxBoneNode = FbxNode.Create(fbxScene, unityBoneTransform.name);
}
MapUnityObjectToFbxNode.Add(unityBoneTransform.gameObject, fbxBoneNode);
}
// Set it up as a skeleton node if we haven't already.
if (fbxBoneNode.GetSkeleton() == null)
{
FbxSkeleton fbxSkeleton = FbxSkeleton.Create(fbxScene, unityBoneTransform.name + "_Skel");
var fbxSkeletonType = index.ContainsKey(unityBoneTransform.parent)
? FbxSkeleton.EType.eLimbNode : FbxSkeleton.EType.eRoot;
fbxSkeleton.SetSkeletonType(fbxSkeletonType);
fbxSkeleton.Size.Set(1.0f);
fbxBoneNode.SetNodeAttribute(fbxSkeleton);
if (Verbose)
{
Debug.Log("Converted " + unityBoneTransform.name + " to a " + fbxSkeletonType + " bone");
}
}
}
// Step 2: connect up the hierarchy.
foreach (var unityBone in bones)
{
var fbxBone = MapUnityObjectToFbxNode[unityBone.gameObject];
var fbxParent = MapUnityObjectToFbxNode[unityBone.parent.gameObject];
fbxParent.AddChild(fbxBone);
}
// Step 3: set up the transforms.
for (int boneIndex = 0, n = bones.Length; boneIndex < n; boneIndex++)
{
var unityBone = bones[boneIndex];
var fbxBone = MapUnityObjectToFbxNode[unityBone.gameObject];
Matrix4x4 pose;
if (fbxBone.GetSkeleton().GetSkeletonType() == FbxSkeleton.EType.eRoot)
{
// bind pose is local -> root. We want root -> local, so invert.
pose = bindPoses[boneIndex].inverse; // assuming parent is identity matrix
}
else
{
// Bind pose is local -> parent -> ... -> root.
// We want parent -> local.
// Invert our bind pose to get root -> local.
// The apply parent -> root to leave just parent -> local.
pose = bindPoses[index[unityBone.parent]] * bindPoses[boneIndex].inverse;
}
// FBX is transposed relative to Unity: transpose as we convert.
FbxMatrix matrix = new FbxMatrix();
matrix.SetColumn(0, new FbxVector4(pose.GetRow(0).x, pose.GetRow(0).y, pose.GetRow(0).z, pose.GetRow(0).w));
matrix.SetColumn(1, new FbxVector4(pose.GetRow(1).x, pose.GetRow(1).y, pose.GetRow(1).z, pose.GetRow(1).w));
matrix.SetColumn(2, new FbxVector4(pose.GetRow(2).x, pose.GetRow(2).y, pose.GetRow(2).z, pose.GetRow(2).w));
matrix.SetColumn(3, new FbxVector4(pose.GetRow(3).x, pose.GetRow(3).y, pose.GetRow(3).z, pose.GetRow(3).w));
// FBX wants translation, rotation (in euler angles) and scale.
// We assume there's no real shear, just rounding error.
FbxVector4 translation, rotation, shear, scale;
double sign;
matrix.GetElements(out translation, out rotation, out shear, out scale, out sign);
// Bones should have zero rotation, and use a pivot instead.
fbxBone.LclTranslation.Set(new FbxDouble3(translation.X, translation.Y, translation.Z));
fbxBone.LclRotation.Set(new FbxDouble3(0, 0, 0));
fbxBone.LclScaling.Set(new FbxDouble3(scale.X, scale.Y, scale.Z));
fbxBone.SetRotationActive(true);
fbxBone.SetPivotState(FbxNode.EPivotSet.eSourcePivot, FbxNode.EPivotState.ePivotReference);
fbxBone.SetPreRotation(FbxNode.EPivotSet.eSourcePivot, new FbxVector4(rotation.X, rotation.Y, rotation.Z));
}
return(true);
}
/// <summary>
/// Export bones of skinned mesh
/// </summary>
protected bool ExportSkeleton(MeshInfo meshInfo, FbxScene fbxScene, FbxNode fbxParentNode,
ref Dictionary <Transform, FbxNode> boneNodes)
{
SkinnedMeshRenderer unitySkinnedMeshRenderer
= meshInfo.renderer as SkinnedMeshRenderer;
if (unitySkinnedMeshRenderer.bones.Length <= 0)
{
return(false);
}
Dictionary <Transform, Matrix4x4> boneBindPose = new Dictionary <Transform, Matrix4x4>();
for (int boneIndex = 0; boneIndex < unitySkinnedMeshRenderer.bones.Length; boneIndex++)
{
Transform unityBoneTransform = unitySkinnedMeshRenderer.bones [boneIndex];
FbxNode fbxBoneNode = FbxNode.Create(fbxScene, unityBoneTransform.name);
// Create the node's attributes
FbxSkeleton fbxSkeleton = FbxSkeleton.Create(fbxScene, unityBoneTransform.name + "_Skel");
var fbxSkeletonType = FbxSkeleton.EType.eLimbNode;
if (unityBoneTransform == unityBoneTransform.root || fbxParentNode.GetName().Equals(unityBoneTransform.parent.name))
{
fbxSkeletonType = FbxSkeleton.EType.eRoot;
}
fbxSkeleton.SetSkeletonType(fbxSkeletonType);
fbxSkeleton.Size.Set(1.0f);
// Set the node's attribute
fbxBoneNode.SetNodeAttribute(fbxSkeleton);
boneBindPose.Add(unityBoneTransform, meshInfo.BindPoses [boneIndex]);
// save relatation between unity transform and fbx bone node for skinning
boneNodes [unityBoneTransform] = fbxBoneNode;
}
// set the hierarchy for the FbxNodes
foreach (KeyValuePair <Transform, FbxNode> t in boneNodes)
{
Matrix4x4 pose;
// if this is a root node then don't need to do anything
if (t.Key == t.Key.root || !boneNodes.ContainsKey(t.Key.parent))
{
fbxParentNode.AddChild(t.Value);
pose = boneBindPose[t.Key].inverse; // assuming parent is identity matrix
}
else
{
boneNodes [t.Key.parent].AddChild(t.Value);
// inverse of my bind pose times parent bind pose
pose = boneBindPose[t.Key.parent] * boneBindPose[t.Key].inverse;
}
// use FbxMatrix to get translation and rotation relative to parent
FbxMatrix matrix = new FbxMatrix();
matrix.SetColumn(0, new FbxVector4(pose.GetRow(0).x, pose.GetRow(0).y, pose.GetRow(0).z, pose.GetRow(0).w));
matrix.SetColumn(1, new FbxVector4(pose.GetRow(1).x, pose.GetRow(1).y, pose.GetRow(1).z, pose.GetRow(1).w));
matrix.SetColumn(2, new FbxVector4(pose.GetRow(2).x, pose.GetRow(2).y, pose.GetRow(2).z, pose.GetRow(2).w));
matrix.SetColumn(3, new FbxVector4(pose.GetRow(3).x, pose.GetRow(3).y, pose.GetRow(3).z, pose.GetRow(3).w));
FbxVector4 translation, rotation, shear, scale;
double sign;
matrix.GetElements(out translation, out rotation, out shear, out scale, out sign);
// Negating the x value of the translation, and the y and z values of the prerotation
// to convert from Unity to Maya coordinates (left to righthanded)
t.Value.LclTranslation.Set(new FbxDouble3(-translation.X, translation.Y, translation.Z));
t.Value.LclRotation.Set(new FbxDouble3(0, 0, 0));
t.Value.LclScaling.Set(new FbxDouble3(scale.X, scale.Y, scale.Z));
t.Value.SetRotationActive(true);
t.Value.SetPivotState(FbxNode.EPivotSet.eSourcePivot, FbxNode.EPivotState.ePivotReference);
t.Value.SetPreRotation(FbxNode.EPivotSet.eSourcePivot, new FbxVector4(rotation.X, -rotation.Y, -rotation.Z));
}
return(true);
}