Changed animation system to support multiple roots

SHADE_Engine/src/Animation/SHAnimatorComponent.cpp

@@ -71,7 +71,7 @@ namespace SHADE
       Play();
 
       // Set to initial pose
-      if (rig && rig->GetRootNode())
+      if (rig && !rig->GetRootNodes().empty())
       {
         updateCurrentAnimatorState(currClip, 0.0f);
       }
@@ -124,7 +124,7 @@ namespace SHADE
     std::fill(boneMatrices.begin(), boneMatrices.end(), SHMatrix::Identity);
 
     // Do not do anything if is not playing or there's nothing to animate
-    if (!rig || !rig->GetRootNode())
+    if (!rig || rig->GetRootNodes().empty())
       return;
 
     // We want to still display a paused pose, so we only prevent progression
@@ -274,7 +274,7 @@ namespace SHADE
   void SHAnimatorComponent::updateCurrentAnimatorState(Handle<SHAnimationClip> clip, float playbackTime)
   {
     // Nothing to animate
-    if (!clip || !rig || !rig->GetRootNode())
+    if (!clip || !rig || rig->GetRootNodes().empty())
       return;
 
     // Check that we have animation data
@@ -286,7 +286,10 @@ namespace SHADE
   }
   void SHAnimatorComponent::updatePoseWithClip(Handle<SHAnimationClip> clip, float poseTime)
   {
-    updatePoseWithClip(poseTime, clip->GetRawAnimation(), rig->GetRootNode(), SHMatrix::Identity);
+    for (auto rootNode : rig->GetRootNodes())
+    {
+      updatePoseWithClip(poseTime, clip->GetRawAnimation(), rootNode, SHMatrix::Identity);
+    }
   }
 
   void SHAnimatorComponent::updatePoseWithClip(float poseTime, Handle<SHRawAnimation> rawAnimData, Handle<SHRigNode> node, const SHMatrix& parentMatrix)

SHADE_Engine/src/Animation/SHRig.cpp

@@ -33,22 +33,21 @@ namespace SHADE
     }
 
     // Do a recursive depth first traversal to populate the rig
-    rootNode = recurseCreateNode(asset, asset.root, nodeStore);
+    auto rootNode = recurseCreateNode(asset, asset.root, nodeStore);
     if (rootNode)
     {
-      globalInverseMatrix = SHMatrix::Inverse(rootNode->TransformMatrix);
+      rootNodes.emplace_back(rootNode);
     }
   }
 
   SHRig::SHRig(SHRig&& rhs)
-  : rootNode            { rhs.rootNode }
+  : rootNodes           { std::move(rhs.rootNodes) }
   , nodeNames           { std::move(rhs.nodeNames) }
   , nodesByName         { std::move(rhs.nodesByName) }
   , nodes               { std::move(rhs.nodes) }
   , nodeIndexMap        { std::move(rhs.nodeIndexMap) }
-  , globalInverseMatrix { std::move(rhs.globalInverseMatrix) }
   {
-    rhs.rootNode = {};
+    rhs.nodes = {};
   }
   SHRig::~SHRig()
   {
@@ -63,17 +62,17 @@ namespace SHADE
 
   SHRig& SHRig::operator=(SHRig&& rhs)
   {
-    rootNode            = rhs.rootNode;
+    rootNodes           = std::move(rhs.rootNodes);
     nodeNames           = std::move(rhs.nodeNames);
     nodesByName         = std::move(rhs.nodesByName);
     nodes               = std::move(rhs.nodes);
     nodeIndexMap        = std::move(rhs.nodeIndexMap);
-    globalInverseMatrix = std::move(rhs.globalInverseMatrix);
 
-    rhs.rootNode = {};
+    rhs.rootNodes = {};
 
     return *this;
   }
+
   /*-----------------------------------------------------------------------------------*/
   /* Usage Functions                                                                   */
   /*-----------------------------------------------------------------------------------*/

SHADE_Engine/src/Animation/SHRig.h

@@ -104,11 +104,10 @@ namespace SHADE
     /// </returns>
     const std::string& GetName(Handle<SHRigNode> node) const noexcept;
     /// <summary>
-    /// Retrieves the root node of the rig.
+    /// Retrieves a read only reference to the root nodes of this rig.
     /// </summary>
-    /// <returns>Handle to the root node of the rig.</returns>
+    /// <returns>Vector of handles to the root node of the rig.</returns>
-    Handle<SHRigNode> GetRootNode() const noexcept { return rootNode; }
+    const std::vector<Handle<SHRigNode>>& GetRootNodes() const noexcept { return rootNodes; }
-    const SHMatrix& GetGlobalInverseMatrix() const noexcept { return globalInverseMatrix; }
     /// <summary>
     /// Retrieves a node via name.
     /// </summary>
@@ -132,12 +131,11 @@ namespace SHADE
     /*---------------------------------------------------------------------------------*/
     /* Data Members                                                                    */
     /*---------------------------------------------------------------------------------*/
-    Handle<SHRigNode> rootNode;
+    std::vector<Handle<SHRigNode>> rootNodes;
     std::unordered_map<Handle<SHRigNode>, std::string> nodeNames;
     std::unordered_map<std::string, Handle<SHRigNode>> nodesByName;
     std::vector<Handle<SHRigNode>> nodes;
     std::unordered_map<Handle<SHRigNode>, int> nodeIndexMap;
-    SHMatrix globalInverseMatrix;
 
     /*---------------------------------------------------------------------------------*/
     /* Helper Functions                                                                */