public static MeshData[] ProcMesh(FbxManager manager, FbxNode node, FbxMesh mesh, ImportOptions importOptions, Matrix4 additionalTransform)
{
var transform = additionalTransform * FbxMath.EvaluateGlobalTransform(node).ToMatrix4();
transform = transform * FbxMath.GetGeometryOffset(node).ToMatrix4();
var converter = new FbxGeometryConverter(manager);
bool success = false;
try
{
mesh = FbxMesh.Cast(converter.Triangulate(mesh, false)); //ToDo :? Может true? Чтобы не создавать второй mesh в Attribute
success = true;
}
catch (Exception ex)
{
FbxImportLog.LogError(node, "Inside Triangulate error: " + ex);
}
if (!success || mesh == null)
{
return(null);
}
MeshData data = ReadTriangles(mesh, node);
var ret = ReadMaterialsAndSplitByMaterials(data);
foreach (var m in ret)
{
ReadMeshElements(m, importOptions, ref transform);
}
return(ret);
}
//ToDo : учет associate model?
// GlobalTransform of the bone at the binding moment.
//
// (Comments from fbxcluster.h)
// Transformation matrices. A link has three transformation matrices:
// - Transform refers to the global initial transform of the geometry node(geometry is the attribute of the node) that contains the link node.
// - TransformLink refers to global initial transform of the link(bone) node.
// - TransformAssociateModel refers to the global initial transform of the associate model.
//
// For example, given a mesh binding with several bones(links), Transform is the global transform
// of the mesh at the binding moment, TransformLink is the global transform of the bone(link)
// at the binding moment, TransformAssociateModel is the global transform of the associate model
// at the binding moment.
FbxAMatrix GetInitialTransform()
{
if (cluster == null)
{
return(FbxMath.EvaluateGlobalTransform(Node));
}
//Each cluster is associated with a FbxNode (bone)
//cluster.GetLink().GetUniqueID() == Node.GetUniqueID();
//??? Учитывать ли AxisSystem?
//??? Не совсем понятны отличаи globalMeshTransform == skin.GetGeometry().GetNode().EvaluateGlobalTransform(), от cluster.GetTransformMatrix()
//matrix associated with the geometry node containing the link. (global transform of the mesh at the binding moment)
FbxAMatrix globalMeshInitialTransform = new FbxAMatrix();
cluster.GetTransformMatrix(globalMeshInitialTransform);
//Get matrix associated with the link node (bind pose, bone transform) at the binding moment
FbxAMatrix boneInitialTransform = new FbxAMatrix();
cluster.GetTransformLinkMatrix(boneInitialTransform);
//Дополнительная матрица которую cluster ассоциирует с Node - Трансформация в момент привязки.
//bind pose matrix that is local for the mesh = Inverse(TransformMatrix) * TransformLinkMatrix
FbxAMatrix localBindPose = (globalMeshInitialTransform.mul(geometryOffset).Inverse()).mul(boneInitialTransform);
//globalMeshTransform * Inverse(globalMeshInitialTransform) * boneInitialTransform
return(globalMeshTransform.mul(geometryOffset).mul(localBindPose));
}
//const int maxNameLength = 40;
//static void AppendName(ref string name1, string name2)
//{
// if (name1.Length < maxNameLength)
// {
// name1 = name1 + " + " + name2;
// if (name1.Length >= maxNameLength) //no more append
// name1 += " + ...";
// }
//}
//void MergeGeometriesByMaterials()
//{
// int mergedCount = 0;
// for (int i = 0; i < Geometries.Count; i++)
// {
// MeshData g1 = Geometries[i];
// if(g1 == null)
// continue;
// for (int j = i + 1; j < Geometries.Count; j++)
// {
// MeshData g2 = Geometries[j];
// if (g2 != null && g1.MaterialIndex == g2.MaterialIndex && g1.VertexComponents == g2.VertexComponents && g1.PolygonSize == g2.PolygonSize)
// {
// var newVertices = new VertexInfo[g1.Vertices.Length + g2.Vertices.Length];
// g1.Vertices.CopyTo(newVertices, 0);
// g2.Vertices.CopyTo(newVertices, g1.Vertices.Length);
// g1.Vertices = newVertices;
// g1.ClearCache(); //No longer valid
// AppendName(ref g1.Name, g2.Name);
// //m1.NormalsSource remains from first
// Geometries[j] = null;
// mergedCount++;
// }
// }
// }
// int count = Geometries.Count - mergedCount;
// var res = new List<MeshData>(count);
// for (int i = 0; i < count; i++)
// if (Geometries[i] != null)
// res.Add(Geometries[i]);
// Geometries = res;
//}
static void FillBoneAssignments(MeshData data, Skeleton skeleton)
{
if (skeleton == null)
{
for (int i = 0; i < data.Vertices.Length; i++)
{
data.Vertices[i].Vertex.BlendIndices = new Vector4I(-1, -1, -1, -1);
}
}
data.VertexComponents |= StandardVertex.Components.BlendIndices | StandardVertex.Components.BlendWeights;
Dictionary <int, BoneAssignment> boneAssignments = ProcessSkeleton.GetBoneAssignments(data.Mesh, skeleton);
if (boneAssignments != null)
{
for (int i = 0; i < data.Vertices.Length; i++)
{
ref VertexInfo v = ref data.Vertices[i];
if (boneAssignments.TryGetValue(v.ControlPointIndex, out BoneAssignment ba))
{
FbxMath.ConvertBoneAssignment(ref ba, out v.Vertex.BlendIndices, out v.Vertex.BlendWeights);
}
else
{
v.Vertex.BlendIndices = new Vector4I(-1, -1, -1, -1);
}
}
}
public SkeletonBone(FbxNode boneNode, SkeletonBone parentBone, FbxSkin[] skins, SceneLoader scene)
{
//this.scene = scene;
this.scene = scene;
Node = boneNode;
ParentBone = parentBone;
//animationTrackKeyFrames = new List<HashSet<double>>();
cluster = Skeleton.FindCluster(Node, skins, out skin); //Поиск по всем skins во всех mesh. Можно было бы сделать эффективнее.
globalMeshTransform = new FbxAMatrix();
globalMeshTransform.SetIdentity();
geometryOffset = new FbxAMatrix();
geometryOffset.SetIdentity();
if (cluster != null)
{
FbxNode meshNode = skin.GetGeometry()?.GetNode();
if (meshNode != null)
{
globalMeshTransform = meshNode.EvaluateGlobalTransform(FbxExtensions.ToFbxTime(-1)); // FbxMath.GetGlobalPosition( meshNode, FbxExtensions.ToFbxTime( -1 ), null );
geometryOffset = FbxMath.GetGeometryOffset(meshNode);
}
}
InitialTransform = GetInitialTransform().ToMatrix4(); //Во внешнем коде надо использовать это значение, т.к. результат GetInitialTransform() может зависеть от установленного AnimationTrack
}