Merge d96da9434e into ed43cacb33

README.md

@@ -1,4 +1,4 @@
-# FBX2glTF
+# FBX2glTF
 
 [![License](https://img.shields.io/badge/License-BSD%203--Clause-blue.svg)](https://opensource.org/licenses/BSD-3-Clause)
 
@@ -56,6 +56,7 @@ Options:
   --flip-v                    Flip all V texture coordinates.
   --no-flip-v                 Don't flip V texture coordinates.
   --no-khr-lights-punctual    Don't use KHR_lights_punctual extension to export FBX lights.
+  --animation-files         Read multiple fbx animation files.
   --user-properties           Transcribe FBX User Properties into glTF node and material 'extras'.
   --blend-shape-normals       Include blend shape normals, if reported present by the FBX SDK.
   --blend-shape-tangents      Include blend shape tangents, if reported present by the FBX SDK.
@@ -97,6 +98,10 @@ Some of these switches are not obvious:
   Your FBX is likely constructed with the assumption that `(0, 0)` is bottom
   left, whereas glTF has `(0, 0)` as top left. To produce spec-compliant glTF,
   we must flip the texcoords. To request unflipped coordinates:
+- '--animation-files' will try to read in additional animations from multiple
+  fbx files with numbers added to the base name (eg. test1.fbx, test2.fbx, ...).
+  It will apply animations to geometry in the base file by matching the node
+  names, so make sure all nodes have a unique name.
 - `--long-indices` lets you force the use of either 16-bit or 32-bit indices.
   The default option is auto, which make the choice on a per-mesh-size basis.
 - `--compute-normals` controls when automatic vertex normals should be computed

src/FBX2glTF.cpp

@@ -137,6 +137,11 @@ int main(int argc, char* argv[]) {
       [&](size_t count) { gltfOptions.useKHRLightsPunctual = (count == 0); },
       "Don't use KHR_lights_punctual extension to export FBX lights.");
 
+  app.add_flag(
+      "--animation-files",
+      gltfOptions.readAnimationFiles,
+      "Read multiple fbx animation files.");
+
   app.add_flag(
       "--user-properties",
       gltfOptions.enableUserProperties,
@@ -314,6 +319,7 @@ int main(int argc, char* argv[]) {
   if (verboseOutput) {
     fmt::printf("Loading FBX File: %s\n", inputPath);
   }
+
   if (!LoadFBXFile(raw, inputPath, {"png", "jpg", "jpeg"}, gltfOptions)) {
     fmt::fprintf(stderr, "ERROR:: Failed to parse FBX: %s\n", inputPath);
     return 1;

src/FBX2glTF.h

@@ -112,6 +112,9 @@ struct GltfOptions {
   /** Whether to include lights through the KHR_punctual_lights extension. */
   bool useKHRLightsPunctual{true};
 
+  /** Whether to read multiple fbx animation files. */
+  bool readAnimationFiles{false};
+
   /** Whether to include blend shape normals, if present according to the SDK. */
   bool useBlendShapeNormals{false};
   /** Whether to include blend shape tangents, if present according to the SDK. */

src/fbx/Fbx2Raw.cpp

@@ -720,7 +720,7 @@ static void ReadNodeHierarchy(
   }
 }
 
-static void ReadAnimations(RawModel& raw, FbxScene* pScene, const GltfOptions& options) {
+static void ReadAnimations(RawModel& raw, FbxScene* pScene, const GltfOptions& options, bool nodeNameLookup) {
   FbxTime::EMode eMode = FbxTime::eFrames24;
   switch (options.animationFramerate) {
     case AnimationFramerateOptions::BAKE24:
@@ -816,7 +816,14 @@ static void ReadAnimations(RawModel& raw, FbxScene* pScene, const GltfOptions& o
       bool hasMorphs = false;
 
       RawChannel channel;
-      channel.nodeIndex = raw.GetNodeById(pNode->GetUniqueID());
+      if (nodeNameLookup) {
+        channel.nodeIndex = raw.GetNodeByName(pNode->GetName());
+      } else {
+        channel.nodeIndex = raw.GetNodeById(pNode->GetUniqueID());
+      }
+      if (channel.nodeIndex == -1) {
+        continue;
+      }
 
       for (FbxLongLong frameIndex = firstFrameIndex; frameIndex <= lastFrameIndex; frameIndex++) {
         FbxTime pTime;
@@ -1068,15 +1075,7 @@ static void FindFbxTextures(
   }
 }
 
-bool LoadFBXFile(
-    RawModel& raw,
-    const std::string fbxFileName,
-    const std::set<std::string>& textureExtensions,
-    const GltfOptions& options) {
-  FbxManager* pManager = FbxManager::Create();
-  FbxIOSettings* pIoSettings = FbxIOSettings::Create(pManager, IOSROOT);
-  pManager->SetIOSettings(pIoSettings);
-
+static FbxScene* LoadScene(FbxManager* pManager, const std::string fbxFileName) {
   FbxImporter* pImporter = FbxImporter::Create(pManager, "");
 
   if (!pImporter->Initialize(fbxFileName.c_str(), -1, pManager->GetIOSettings())) {
@@ -1084,8 +1083,7 @@ bool LoadFBXFile(
       fmt::printf("%s\n", pImporter->GetStatus().GetErrorString());
     }
     pImporter->Destroy();
-    pManager->Destroy();
-    return false;
+    return nullptr;
   }
 
   FbxScene* pScene = FbxScene::Create(pManager, "fbxScene");
@@ -1093,14 +1091,9 @@ bool LoadFBXFile(
   pImporter->Destroy();
 
   if (pScene == nullptr) {
-    pImporter->Destroy();
-    pManager->Destroy();
-    return false;
+    return nullptr;
   }
 
-  std::map<const FbxTexture*, FbxString> textureLocations;
-  FindFbxTextures(pScene, fbxFileName, textureExtensions, textureLocations);
-
   // Use Y up for glTF
   FbxAxisSystem::MayaYUp.ConvertScene(pScene);
 
@@ -1113,14 +1106,54 @@ bool LoadFBXFile(
   if (sceneSystemUnit != FbxSystemUnit::cm) {
     FbxSystemUnit::cm.ConvertScene(pScene);
   }
+
+  return pScene;
+}
+
+bool LoadFBXFile(
+    RawModel& raw,
+    const std::string fbxFileName,
+    const std::set<std::string>& textureExtensions,
+    const GltfOptions& options) {
+  FbxManager* pManager = FbxManager::Create();
+  FbxIOSettings* pIoSettings = FbxIOSettings::Create(pManager, IOSROOT);
+  pManager->SetIOSettings(pIoSettings);
+
+  FbxScene* pScene = LoadScene(pManager, fbxFileName);
+  if (pScene == nullptr) {
+    pManager->Destroy();
+    return false;
+  }
+
   // this is always 0.01, but let's opt for clarity.
   scaleFactor = FbxSystemUnit::m.GetConversionFactorFrom(FbxSystemUnit::cm);
 
+  std::map<const FbxTexture*, FbxString> textureLocations;
+  FindFbxTextures(pScene, fbxFileName, textureExtensions, textureLocations);
+
   ReadNodeHierarchy(raw, pScene, pScene->GetRootNode(), 0, "");
   ReadNodeAttributes(raw, pScene, pScene->GetRootNode(), textureLocations);
-  ReadAnimations(raw, pScene, options);
+  ReadAnimations(raw, pScene, options, false);
 
   pScene->Destroy();
+
+  // read additional animation files
+  bool readAnimationFiles = options.readAnimationFiles;
+  int animationFileNumber = 1;
+  while (readAnimationFiles) {
+    std::string animationFileName = StringUtils::GetFolderString(fbxFileName) +
+        StringUtils::GetFileBaseString(fbxFileName) +
+        std::to_string(animationFileNumber) + ".fbx";
+    FbxScene* pAnimationScene = LoadScene(pManager, animationFileName.c_str());
+    if (pAnimationScene != nullptr) {
+      ReadAnimations(raw, pAnimationScene, options, true);
+      pAnimationScene->Destroy();
+      animationFileNumber++;
+    } else {
+      readAnimationFiles = false;
+    }
+  }
+
   pManager->Destroy();
 
   return true;

src/raw/RawModel.cpp

@@ -640,6 +640,15 @@ int RawModel::GetNodeById(const long nodeId) const {
   return -1;
 }
 
+int RawModel::GetNodeByName(const char* name) const {
+  for (size_t i = 0; i < nodes.size(); i++) {
+    if (nodes[i].name == name) {
+      return (int)i;
+    }
+  }
+  return -1;
+}
+
 int RawModel::GetSurfaceById(const long surfaceId) const {
   for (size_t i = 0; i < surfaces.size(); i++) {
     if (surfaces[i].id == surfaceId) {

src/raw/RawModel.hpp

@@ -508,6 +508,7 @@ class RawModel {
     return nodes[index];
   }
   int GetNodeById(const long nodeId) const;
+  int GetNodeByName(const char* name) const;
 
   // Create individual attribute arrays.
   // Returns true if the vertices store the particular attribute.