protected void LinkMeshToSkeleton(FbxScene scene, FbxNode meshNode, FbxNode skelRootNode)
{
FbxNode limb1 = skelRootNode.GetChild(0);
FbxNode limb2 = limb1.GetChild(0);
FbxCluster rootCluster = FbxCluster.Create(scene, "RootCluster");
rootCluster.SetLink(skelRootNode);
rootCluster.SetLinkMode(FbxCluster.ELinkMode.eTotalOne);
for (int i = 0; i < 4; i++)
{
for (int j = 0; j < 4; j++)
{
rootCluster.AddControlPointIndex(4 * i + j, 1.0 - 0.25 * i);
}
}
FbxCluster limb1Cluster = FbxCluster.Create(scene, "Limb1Cluster");
limb1Cluster.SetLink(limb1);
limb1Cluster.SetLinkMode(FbxCluster.ELinkMode.eTotalOne);
for (int i = 1; i < 6; i++)
{
for (int j = 0; j < 4; j++)
{
limb1Cluster.AddControlPointIndex(4 * i + j, (i == 1 || i == 5 ? 0.25 : 0.5));
}
}
FbxCluster limb2Cluster = FbxCluster.Create(scene, "Limb2Cluster");
limb2Cluster.SetLink(limb2);
limb2Cluster.SetLinkMode(FbxCluster.ELinkMode.eTotalOne);
for (int i = 3; i < 7; i++)
{
for (int j = 0; j < 4; j++)
{
limb2Cluster.AddControlPointIndex(4 * i + j, 0.25 * (i - 2));
}
}
FbxAMatrix globalTransform = meshNode.EvaluateGlobalTransform();
rootCluster.SetTransformMatrix(globalTransform);
limb1Cluster.SetTransformMatrix(globalTransform);
limb2Cluster.SetTransformMatrix(globalTransform);
rootCluster.SetTransformLinkMatrix(skelRootNode.EvaluateGlobalTransform());
limb1Cluster.SetTransformLinkMatrix(limb1.EvaluateGlobalTransform());
limb2Cluster.SetTransformLinkMatrix(limb2.EvaluateGlobalTransform());
FbxSkin skin = FbxSkin.Create(scene, "Skin");
skin.AddCluster(rootCluster);
skin.AddCluster(limb1Cluster);
skin.AddCluster(limb2Cluster);
meshNode.GetMesh().AddDeformer(skin);
}
public void Skin_AddCluster_AddsCluster()
{
// given:
var s = new FbxSkin("");
var c = new FbxCluster("");
// require:
Assert.AreEqual(0, s.GetSrcObjectCount());
Assert.AreEqual(0, s.GetDstObjectCount());
Assert.AreEqual(0, s.GetClusterCount());
Assert.AreEqual(0, c.GetSrcObjectCount());
Assert.AreEqual(0, c.GetDstObjectCount());
// when:
s.AddCluster(c);
// then:
Assert.AreEqual(1, s.GetSrcObjectCount());
Assert.AreSame(c, s.GetSrcObject(0));
Assert.AreEqual(0, s.GetDstObjectCount());
Assert.AreEqual(1, s.GetClusterCount());
Assert.AreSame(c, s.GetCluster(0));
Assert.AreEqual(0, c.GetSrcObjectCount());
Assert.AreEqual(1, c.GetDstObjectCount());
Assert.AreSame(s, c.GetDstObject(0));
}
/// <summary>
/// Export binding of mesh to skeleton
/// </summary>
protected void ExportSkin(MeshInfo meshInfo, FbxScene fbxScene, FbxMesh fbxMesh,
FbxNode fbxRootNode,
Dictionary <Transform, FbxNode> boneNodes)
{
SkinnedMeshRenderer unitySkinnedMeshRenderer
= meshInfo.renderer as SkinnedMeshRenderer;
FbxSkin fbxSkin = FbxSkin.Create(fbxScene, (meshInfo.unityObject.name + "_Skin"));
FbxAMatrix fbxMeshMatrix = fbxRootNode.EvaluateGlobalTransform();
// keep track of the bone index -> fbx cluster mapping, so that we can add the bone weights afterwards
Dictionary <int, FbxCluster> boneCluster = new Dictionary <int, FbxCluster> ();
for (int i = 0; i < unitySkinnedMeshRenderer.bones.Length; i++)
{
FbxNode fbxBoneNode = boneNodes [unitySkinnedMeshRenderer.bones[i]];
// Create the deforming cluster
FbxCluster fbxCluster = FbxCluster.Create(fbxScene, "BoneWeightCluster");
fbxCluster.SetLink(fbxBoneNode);
fbxCluster.SetLinkMode(FbxCluster.ELinkMode.eTotalOne);
boneCluster.Add(i, fbxCluster);
// set the Transform and TransformLink matrix
fbxCluster.SetTransformMatrix(fbxMeshMatrix);
FbxAMatrix fbxLinkMatrix = fbxBoneNode.EvaluateGlobalTransform();
fbxCluster.SetTransformLinkMatrix(fbxLinkMatrix);
// add the cluster to the skin
fbxSkin.AddCluster(fbxCluster);
}
// set the vertex weights for each bone
SetVertexWeights(meshInfo, boneCluster);
// Add the skin to the mesh after the clusters have been added
fbxMesh.AddDeformer(fbxSkin);
}
