compute all bones transform

FModel/Views/Snooper/Models/Animations/Animation.cs

@@ -1,4 +1,5 @@
 using System;
+using System.Collections.Generic;
 using System.Numerics;
 using CUE4Parse_Conversion.Animations;
 using CUE4Parse.UE4.Objects.Core.Math;
@@ -10,17 +11,24 @@ public class Animation : IDisposable
     public float CurrentTime;
     public float DeltaTime;
     public CAnimSet CurrentAnimation;
-    public Matrix4x4[] FinalBonesMatrix;
+    public Transform[] FinalBonesMatrix;
 
-    public Animation(CAnimSet anim)
+    public Animation(CAnimSet anim, Dictionary<string, int> nameToIndex, Dictionary<int, Transform> indexToTransform)
     {
         CurrentTime = 0f;
         CurrentAnimation = anim;
 
-        FinalBonesMatrix = new Matrix4x4[anim.TrackBoneNames.Length];
+        FinalBonesMatrix = new Transform[anim.TrackBoneNames.Length];
         for (int i = 0; i < FinalBonesMatrix.Length; i++)
         {
-            FinalBonesMatrix[i] = Matrix4x4.Identity;
+            if (!nameToIndex.TryGetValue(anim.TrackBoneNames[i].Text, out var boneIndex) ||
+                !indexToTransform.TryGetValue(boneIndex, out var boneTransform))
+            {
+                boneTransform = Transform.Identity;
+            }
+
+            FinalBonesMatrix[i] = Transform.Identity;
+            FinalBonesMatrix[i].Relation = boneTransform.Matrix;
         }
     }
 
@@ -29,7 +37,7 @@ public class Animation : IDisposable
         DeltaTime = deltaTime;
         if (CurrentAnimation != null)
         {
-            CurrentTime = deltaTime;
+            // CurrentTime = deltaTime;
             CalculateBoneTransform();
         }
     }
@@ -43,17 +51,8 @@ public class Animation : IDisposable
             var bonePosition = FVector.ZeroVector;
             sequence.Tracks[boneIndex].GetBonePosition(CurrentTime, sequence.NumFrames, false, ref bonePosition, ref boneOrientation);
 
-            boneOrientation *= CurrentAnimation.BonePositions[boneIndex].Orientation;
+            FinalBonesMatrix[boneIndex].Rotation = boneOrientation;
-            bonePosition = boneOrientation.RotateVector(bonePosition);
+            FinalBonesMatrix[boneIndex].Position = bonePosition * Constants.SCALE_DOWN_RATIO;
-            bonePosition *= Constants.SCALE_DOWN_RATIO;
-            if (CurrentAnimation.TrackBoneNames[boneIndex].Text == "pelvis")
-            {
-
-            }
-
-            FinalBonesMatrix[boneIndex] =
-                Matrix4x4.CreateFromQuaternion(boneOrientation) *
-                Matrix4x4.CreateTranslation(bonePosition);
         }
     }
 

FModel/Views/Snooper/Models/Animations/Skeleton.cs

@@ -1,5 +1,6 @@
 using System;
 using System.Collections.Generic;
+using CUE4Parse_Conversion.Animations;
 using CUE4Parse.UE4.Assets.Exports.Animation;
 using CUE4Parse.UE4.Assets.Exports.SkeletalMesh;
 using CUE4Parse.UE4.Objects.UObject;
@@ -9,59 +10,83 @@ namespace FModel.Views.Snooper.Models.Animations;
 
 public class Skeleton : IDisposable
 {
-    public readonly USkeleton RefSkel;
+    public readonly USkeleton UnrealSkeleton;
+    public readonly Dictionary<string, int> BonesIndexByName;
+    public readonly Dictionary<int, Transform> BonesTransformByIndex;
     public readonly bool IsLoaded;
+
     public readonly Socket[] Sockets;
 
     public Animation Anim;
 
     public Skeleton(FPackageIndex package)
     {
-        RefSkel = package.Load<USkeleton>();
+        UnrealSkeleton = package.Load<USkeleton>();
-        if (RefSkel == null) return;
+        if (UnrealSkeleton == null) return;
 
+        BonesIndexByName = UnrealSkeleton.ReferenceSkeleton.FinalNameToIndexMap;
+        BonesTransformByIndex = new Dictionary<int, Transform>();
+        foreach ((_, int boneIndex) in BonesIndexByName)
+        {
+            var transforms = new List<Transform>();
+            var parentBoneIndex = boneIndex;
+            while (parentBoneIndex > -1)
+            {
+                var parentFound = BonesTransformByIndex.TryGetValue(parentBoneIndex, out var boneTransform);
+                if (!parentFound)
+                {
+                    var bone = UnrealSkeleton.ReferenceSkeleton.FinalRefBonePose[parentBoneIndex];
+                    boneTransform = new Transform
+                    {
+                        Rotation = bone.Rotation,
+                        Position = bone.Translation * Constants.SCALE_DOWN_RATIO,
+                        Scale = bone.Scale3D
+                    };
+                }
+
+                parentBoneIndex = UnrealSkeleton.ReferenceSkeleton.FinalRefBoneInfo[parentBoneIndex].ParentIndex;
+                transforms.Add(boneTransform);
+                if (parentFound) parentBoneIndex = -1; // the parent transform is already relative to all its parent so we can just skip
+            }
+
+            for (int j = transforms.Count - 2; j > -1; j--)
+            {
+                transforms[j].Relation *= transforms[j + 1].Matrix;
+            }
+
+            BonesTransformByIndex[boneIndex] = transforms[0];
+            transforms.Clear();
+        }
         IsLoaded = true;
-        Sockets = new Socket[RefSkel.Sockets.Length];
+
+        Sockets = new Socket[UnrealSkeleton.Sockets.Length];
         for (int i = 0; i < Sockets.Length; i++)
         {
-            if (RefSkel.Sockets[i].Load<USkeletalMeshSocket>() is not { } socket) continue;
+            if (UnrealSkeleton.Sockets[i].Load<USkeletalMeshSocket>() is not { } socket) continue;
 
-            if (!RefSkel.ReferenceSkeleton.FinalNameToIndexMap.TryGetValue(socket.BoneName.Text, out var boneIndex))
+            if (!BonesIndexByName.TryGetValue(socket.BoneName.Text, out var boneIndex) ||
+                !BonesTransformByIndex.TryGetValue(boneIndex, out var boneTransform))
             {
                 Sockets[i] = new Socket(socket);
             }
             else
             {
-                var transforms = new List<Transform>();
+                Sockets[i] = new Socket(socket, boneTransform);
-                while (boneIndex > -1)
-                {
-                    var bone = RefSkel.ReferenceSkeleton.FinalRefBonePose[boneIndex];
-                    boneIndex = RefSkel.ReferenceSkeleton.FinalRefBoneInfo[boneIndex].ParentIndex;
-
-                    transforms.Add(new Transform
-                    {
-                        Rotation = bone.Rotation,
-                        Position = bone.Translation * Constants.SCALE_DOWN_RATIO,
-                        Scale = bone.Scale3D
-                    });
-                }
-
-                for (int j = transforms.Count - 2; j > -1; j--)
-                {
-                    transforms[j].Relation *= transforms[j + 1].Matrix;
-                }
-
-                Sockets[i] = new Socket(socket, transforms[0]);
             }
         }
     }
 
+    public void SetAnimation(CAnimSet anim)
+    {
+        Anim = new Animation(anim, BonesIndexByName, BonesTransformByIndex);
+    }
+
     public void SetUniform(Shader shader)
     {
         if (!IsLoaded) return;
         for (var i = 0; i < Anim?.FinalBonesMatrix.Length; i++)
         {
-            shader.SetUniform($"uFinalBonesMatrix[{i}]", Anim.FinalBonesMatrix[i]);
+            shader.SetUniform($"uFinalBonesMatrix[{i}]", Anim.FinalBonesMatrix[i].Matrix);
         }
     }
 

FModel/Views/Snooper/Models/Socket.cs

@@ -23,7 +23,7 @@ public class Socket : IDisposable
     {
         Name = socket.SocketName.Text;
         Bone = socket.BoneName.Text;
-        Transform = transform;
+        Transform = Transform.Identity;
         Transform.Relation = transform.Matrix;
         Transform.Rotation = socket.RelativeRotation.Quaternion();
         Transform.Position = socket.RelativeLocation * Constants.SCALE_DOWN_RATIO;

FModel/Views/Snooper/Renderer.cs

@@ -89,10 +89,10 @@ public class Renderer : IDisposable
     public void Animate(UAnimSequence animSequence)
     {
         if (!Options.TryGetModel(out var model) || !model.Skeleton.IsLoaded ||
-            model.Skeleton?.RefSkel.ConvertAnims(animSequence) is not { } anim || anim.Sequences.Count == 0)
+            model.Skeleton?.UnrealSkeleton.ConvertAnims(animSequence) is not { } anim || anim.Sequences.Count == 0)
             return;
 
-        model.Skeleton.Anim = new Animation(anim);
+        model.Skeleton.SetAnimation(anim);
         Options.AnimateMesh(false);
     }
 

FModel/Views/Snooper/SnimGui.cs

@@ -338,7 +338,6 @@ Snooper aims to give an accurate preview of models, materials, skeletal animatio
                             _saver.Value = model.TrySave(out _saver.Label, out _saver.Path);
                             s.WindowShouldFreeze(false);
                         }
-
                         ImGui.BeginDisabled(true);
                         // ImGui.BeginDisabled(!model.HasSkeleton);
                         if (ImGui.Selectable("Animate"))
@@ -346,7 +345,6 @@ Snooper aims to give an accurate preview of models, materials, skeletal animatio
                             s.Renderer.Options.AnimateMesh(true);
                             s.WindowShouldClose(true, false);
                         }
-
                         ImGui.EndDisabled();
                         if (ImGui.Selectable("Teleport To"))
                         {
@@ -432,8 +430,8 @@ Snooper aims to give an accurate preview of models, materials, skeletal animatio
                 Layout("Guid");ImGui.Text($" :  {s.Renderer.Options.SelectedModel.ToString(EGuidFormats.UniqueObjectGuid)}");
                 if (model.HasSkeleton)
                 {
-                    Layout("Skeleton");ImGui.Text($" :  {model.Skeleton.RefSkel.Name}");
+                    Layout("Skeleton");ImGui.Text($" :  {model.Skeleton.UnrealSkeleton.Name}");
-                    Layout("Bones");ImGui.Text($" :  x{model.Skeleton.RefSkel.BoneTree.Length}");
+                    Layout("Bones");ImGui.Text($" :  x{model.Skeleton.UnrealSkeleton.BoneTree.Length}");
                     Layout("Sockets");ImGui.Text($" :  x{model.Skeleton.Sockets.Length}");
                 }
                 else