Flag bones in scene for skel export

code/nel/tools/3d/mesh_export/main.cpp

@@ -21,6 +21,9 @@
 #include <nel/misc/cmd_args.h>
 #include <nel/misc/path.h>
 
+#include <nel/3d/register_3d.h>
+#include <nel/3d/scene.h>
+
 int printHelp(const NLMISC::CCmdArgs &args)
 {
 	printf("NeL Mesh Export\n");
@@ -29,6 +32,8 @@ int printHelp(const NLMISC::CCmdArgs &args)
 
 int main(int argc, char *argv[])
 {
+	NLMISC::CApplicationContext app;
+
 	NLMISC::CCmdArgs args;
 	args.setArgs(argc, (const char **)argv);
 
@@ -48,12 +53,16 @@ int main(int argc, char *argv[])
 	CMeshUtilsSettings settings;
 	settings.SourceFilePath = filePath;
 	
-	settings.DestinationDirectory = args.getArg('d');
-	if (settings.DestinationDirectory.empty())
-		settings.DestinationDirectory = args.getLongArg("dst");
-	if (settings.DestinationDirectory.empty())
-		settings.DestinationDirectory = filePath + "_export";
-	settings.DestinationDirectory += "/";
+	if (args.haveArg('d'))
+		settings.DestinationDirectoryPath = args.getArg('d');
+	if (settings.DestinationDirectoryPath.empty())
+		settings.DestinationDirectoryPath = args.getLongArg("dst");
+	if (settings.DestinationDirectoryPath.empty())
+		settings.DestinationDirectoryPath = filePath + "_export";
+	settings.DestinationDirectoryPath += "/";
+
+	NL3D::CScene::registerBasics();
+	NL3D::registerSerial3d();
 
 	return exportScene(settings);
 }

code/nel/tools/3d/mesh_utils/mesh_utils.cpp

@@ -18,8 +18,138 @@
 #include <nel/misc/types_nl.h>
 #include "mesh_utils.h"
 
-int exportScene(CMeshUtilsSettings &settings)
+#include <nel/misc/debug.h>
+
+#include <assimp/postprocess.h>
+#include <assimp/scene.h>
+#include <assimp/Importer.hpp>
+
+CMeshUtilsSettings::CMeshUtilsSettings()
 {
+	ShapeDirectory = "shape";
+	IGDirectory = "ig";
+	SkelDirectory = "skel";
+}
+
+struct CNodeContext
+{
+	CNodeContext() :
+		AssimpNode(NULL),
+		IsBone(false)
+	{
+
+	}
+
+	const aiNode *AssimpNode;
+	bool IsBone;
+};
+
+struct CMeshUtilsContext
+{
+	CMeshUtilsContext(const CMeshUtilsSettings &settings) : Settings(settings), AssimpScene(NULL)
+	{
+
+	}
+
+	const CMeshUtilsSettings &Settings;
+
+	const aiScene *AssimpScene;
+	std::map<std::string, CNodeContext> Nodes;
+};
+
+struct CNodeMeta
+{
+	// TODO
+};
+static const CNodeMeta g_DefaultMeta;
+
+void importNode(CMeshUtilsContext &context, const aiNode *node, const CNodeMeta *meta)
+{
+	if (node->mNumMeshes)
+	{
+		// TODO
+	}
+
+	for (unsigned int i = 0; i < node->mNumChildren; ++i)
+		importNode(context, node->mChildren[i], &g_DefaultMeta);
+}
+
+void validateAssimpNodeNames(CMeshUtilsContext &context, const aiNode *node)
+{
+	if (!node->mParent || node == context.AssimpScene->mRootNode)
+	{
+		// do nothing
+	}
+	else if (node->mName.length == 0)
+	{
+		nlwarning("CRITICAL: Node has no name");
+	}
+	else
+	{
+		CNodeContext &nodeContext = context.Nodes[node->mName.C_Str()];
+
+		if (nodeContext.AssimpNode && nodeContext.AssimpNode != node)
+		{
+			nlwarning("CRITICAL: Node name '%s' appears multiple times", node->mName.C_Str());
+		}
+		else
+		{
+			nodeContext.AssimpNode = node;
+		}
+	}
+
+	for (unsigned int i = 0; i < node->mNumChildren; ++i)
+		validateAssimpNodeNames(context, node->mChildren[i]);
+}
+
+void flagAssimpBones(CMeshUtilsContext &context)
+{
+	// Find out which nodes are bones by checking the mesh meta info
+	const aiScene *scene = context.AssimpScene;
+	for (unsigned int i = 0; i < scene->mNumMeshes; ++i)
+	{
+		// nldebug("FOUND MESH '%s'\n", scene->mMeshes[i]->mName.C_Str());
+		const aiMesh *mesh = scene->mMeshes[i];
+		for (unsigned int j = 0; j < mesh->mNumBones; ++j)
+		{
+			CNodeContext &nodeContext = context.Nodes[mesh->mBones[i]->mName.C_Str()];
+			if (!nodeContext.AssimpNode)
+			{
+				nlwarning("CRITICAL: Bone '%s' has no associated node", mesh->mBones[i]->mName.C_Str());
+			}
+			else
+			{
+				// Flag as bone
+				nodeContext.IsBone = true;
+
+				// Flag all parents as bones
+				const aiNode *parent = nodeContext.AssimpNode;
+				while (parent = parent->mParent) if (parent->mName.length)
+				{
+					context.Nodes[parent->mName.C_Str()].IsBone = true;
+				}
+			}
+		}
+	}
+}
+
+// TODO: Separate load scene and save scene functions
+int exportScene(const CMeshUtilsSettings &settings)
+{
+	Assimp::Importer importer;
+	const aiScene *scene = importer.ReadFile(settings.SourceFilePath, aiProcess_Triangulate | aiProcess_ValidateDataStructure); // aiProcess_SplitLargeMeshes | aiProcess_LimitBoneWeights
+	// aiProcess_ValidateDataStructure: TODO: Catch Assimp error output stream
+	// aiProcess_RemoveRedundantMaterials: Not used because we may override materials with NeL Material from meta
+	// aiProcess_ImproveCacheLocality: TODO: Verify this does not modify vertex indices
+	//scene->mRootNode->mMetaData
+
+	CMeshUtilsContext context(settings);
+	context.AssimpScene = scene;
+
+	flagAssimpBones(context);
+
+	importNode(context, scene->mRootNode, &g_DefaultMeta);
+
 	return EXIT_SUCCESS;
 }
 

code/nel/tools/3d/mesh_utils/mesh_utils.h

@@ -21,10 +21,18 @@
 
 struct CMeshUtilsSettings
 {
+	CMeshUtilsSettings();
+
+	// Absolute Paths
 	std::string SourceFilePath;
-	std::string DestinationDirectory;
+	std::string DestinationDirectoryPath;
+
+	// Relative Directories
+	std::string ShapeDirectory;
+	std::string IGDirectory;
+	std::string SkelDirectory;
 };
 
-int exportScene(CMeshUtilsSettings &settings);
+int exportScene(const CMeshUtilsSettings &settings);
 
 /* end of file */