Shape import

--HG--
branch : feature-export-assimp

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

@@ -30,12 +30,207 @@
 #include <nel/misc/path.h>
 #include <nel/misc/tool_logger.h>
 
+#include <nel/3d/mesh.h>
+
 using namespace std;
 using namespace NLMISC;
+using namespace NL3D;
 
-void assimpShape(CMeshUtilsContext &context, CNodeContext &nodeContext)
+// TODO: buildParticleSystem ??
+// TODO: buildWaveMakerShape ??
+// TODO: buildRemanence ??
+// TODO: buildFlare ??
+// Probably specific settings we can only do in meta editor on a dummy node..
+
+// TODO: buildWaterShape specifics when node has water material
+
+// TODO: CMeshMultiLod::CMeshMultiLodBuild multiLodBuild; export_mesh.cpp ln 228
+// TODO: LOD MRM
+
+// TODO: Skinned - reverse transform by skeleton root bone to align?
+
+void assimpBuildBaseMesh(CMeshBase::CMeshBaseBuild &buildBaseMesh, CNodeContext &nodeContext)
 {
+	const aiNode *node = nodeContext.InternalNode;
+	// TODO: Reference CExportNel::buildBaseMeshInterface
+}
 
+inline CVector convVector(const aiVector3D &av)
+{
+	return CVector(-av.x, av.z, av.y); // COORDINATE CONVERSION
+}
+
+inline CRGBA convColor(const aiColor4D &ac)
+{
+	return CRGBA(ac.r * 255.99f, ac.g * 255.99f, ac.b * 255.99f, ac.a * 255.99f);
+}
+
+bool assimpBuildMesh(CMesh::CMeshBuild &buildMesh, CMeshBase::CMeshBaseBuild &buildBaseMesh, CMeshUtilsContext &context, CNodeContext &nodeContext)
+{
+	// TODO
+	// *** If the mesh is skined, vertices will be exported in world space.
+	// *** If the mesh is not skined, vertices will be exported in offset space.
+
+	// TODO Support skinning
+
+	const aiNode *node = nodeContext.InternalNode;
+
+	// Basic validations before processing starts
+	for (unsigned int mi = 0; mi < node->mNumMeshes; ++mi)
+	{
+		// TODO: Maybe needs to be the same count too for all meshes, so compare with mesh 0
+		const aiMesh *mesh = context.InternalScene->mMeshes[node->mMeshes[mi]];
+		if (mesh->GetNumColorChannels() > 2)
+		{
+			tlerror(context.ToolLogger, context.Settings.SourceFilePath.c_str(),
+				"(%s) mesh->GetNumColorChannels() > 2", node->mName.C_Str());
+			return false;
+		}
+		if (mesh->GetNumUVChannels() > 1)
+		{
+			tlerror(context.ToolLogger, context.Settings.SourceFilePath.c_str(),
+				"(%s) mesh->GetNumUVChannels() > 1", node->mName.C_Str());
+			return false;
+		}
+		if (!mesh->HasNormals())
+		{
+			tlerror(context.ToolLogger, context.Settings.SourceFilePath.c_str(),
+				"(%s) !mesh->HasNormals()", node->mName.C_Str());
+			return false;
+		}
+	}
+
+	// TODO: UV Channels
+	for (uint i = 0; i < CVertexBuffer::MaxStage; ++i)
+		buildMesh.UVRouting[i] = i;
+
+	// Meshes in assimp are separated per material, so we need to re-merge them for the mesh build process
+	// This process also deduplicates vertices
+	sint32 numVertices = 0;
+	for (unsigned int mi = 0; mi < node->mNumMeshes; ++mi)
+		numVertices += context.InternalScene->mMeshes[node->mMeshes[mi]]->mNumVertices;
+	buildMesh.Vertices.resize(numVertices);
+	numVertices = 0;
+	map<CVector, sint32> vertexIdentifiers;
+	vector<vector<sint32> > vertexRemapping;
+	vertexRemapping.resize(node->mNumMeshes);
+	for (unsigned int mi = 0; mi < node->mNumMeshes; ++mi)
+	{
+		const aiMesh *mesh = context.InternalScene->mMeshes[node->mMeshes[mi]];
+		vertexRemapping[mi].resize(mesh->mNumVertices);
+		for (unsigned int vi = 0; vi < mesh->mNumVertices; ++vi)
+		{
+			CVector vec = convVector(mesh->mVertices[vi]);
+			map<CVector, sint32>::iterator vecit = vertexIdentifiers.find(vec);
+			if (vecit == vertexIdentifiers.end())
+			{
+				buildMesh.Vertices[numVertices] = vec;
+				vertexIdentifiers[vec] = numVertices;
+				vertexRemapping[mi][vi] = numVertices;
+				++numVertices;
+			}
+			else
+			{
+				vertexRemapping[mi][vi] = vecit->second;
+			}
+		}
+	}
+	buildMesh.Vertices.resize(numVertices);
+
+	// Process all faces
+	// WONT IMPLEMENT: Radial faces generation... is linked to smoothing group... 
+	// leave radial normals generation to modeling tool for now...
+	sint32 numFaces = 0;
+	for (unsigned int mi = 0; mi < node->mNumMeshes; ++mi)
+		numFaces += context.InternalScene->mMeshes[node->mMeshes[mi]]->mNumFaces;
+	buildMesh.Faces.resize(numFaces);
+	numFaces = 0;
+	for (unsigned int mi = 0; mi < node->mNumMeshes; ++mi)
+	{
+		const aiMesh *mesh = context.InternalScene->mMeshes[node->mMeshes[mi]];
+		unsigned int numColorChannels = mesh->GetNumColorChannels(); // TODO: Maybe needs to be same on all mesh parts
+		for (unsigned int fi = 0; fi < mesh->mNumFaces; ++fi)
+		{
+			const aiFace &af = mesh->mFaces[fi];
+			if (af.mNumIndices != 3)
+			{
+				tlerror(context.ToolLogger, context.Settings.SourceFilePath.c_str(),
+					"(%s) Face %i on mesh %i has %i faces", node->mName.C_Str(), fi, mi, af.mNumIndices);
+				continue; // return false; Keep going, just drop the face for better user experience
+			}
+			CMesh::CFace &face = buildMesh.Faces[numFaces];
+			face.MaterialId = mi;
+			face.SmoothGroup = 0; // No smoothing group (bitfield)
+			face.Corner[0].Vertex = vertexRemapping[mi][af.mIndices[0]];
+			face.Corner[1].Vertex = vertexRemapping[mi][af.mIndices[1]];
+			face.Corner[2].Vertex = vertexRemapping[mi][af.mIndices[2]];
+			face.Corner[0].Normal = convVector(mesh->mNormals[af.mIndices[0]]);
+			face.Corner[0].Normal = convVector(mesh->mNormals[af.mIndices[1]]);
+			face.Corner[0].Normal = convVector(mesh->mNormals[af.mIndices[2]]);
+			// TODO: UV
+			if (numColorChannels > 0) // TODO: Verify
+			{
+				face.Corner[0].Color = convColor(mesh->mColors[0][af.mIndices[0]]);
+				face.Corner[1].Color = convColor(mesh->mColors[0][af.mIndices[1]]);
+				face.Corner[2].Color = convColor(mesh->mColors[0][af.mIndices[2]]);
+				if (numColorChannels > 1) // TODO: Verify
+				{
+					face.Corner[0].Specular = convColor(mesh->mColors[0][af.mIndices[0]]);
+					face.Corner[1].Specular = convColor(mesh->mColors[0][af.mIndices[1]]);
+					face.Corner[2].Specular = convColor(mesh->mColors[0][af.mIndices[2]]);
+				}
+			}
+			// TODO: Color modulate, alpha, use color alpha for vp tree, etc
+			++numFaces;
+		}
+	}
+	buildMesh.Faces.resize(numFaces);
+
+	// clear for MRM info
+	buildMesh.Interfaces.clear();
+	buildMesh.InterfaceLinks.clear();
+
+	// TODO: Export VP
+	buildMesh.MeshVertexProgram = NULL;
+	
+	return true;
+}
+
+bool assimpShape(CMeshUtilsContext &context, CNodeContext &nodeContext)
+{
+	// Reference: export_mesh.cpp, buildShape
+	nodeContext.Shape = NULL;
+
+	const aiNode *node = nodeContext.InternalNode;
+	nlassert(node->mNumMeshes);
+
+	// Fill the build interface of CMesh
+	CMeshBase::CMeshBaseBuild buildBaseMesh;
+	assimpBuildBaseMesh(buildBaseMesh, nodeContext);
+
+	CMesh::CMeshBuild buildMesh;
+	if (!assimpBuildMesh(buildMesh, buildBaseMesh, context, nodeContext))
+		return false;
+
+	// Make a CMesh object
+	CMesh *mesh = new CMesh();
+
+	// Build the mesh with the build interface
+	mesh->build(buildBaseMesh, buildMesh);
+
+	// TODO
+	// Reference: export_mesh.cpp, buildShape
+	// Must be done after the build to update vertex links
+	// Pass to buildMeshMorph if the original mesh is skinned or not
+	// buildMeshMorph(buildMesh, node, time, nodeMap != NULL);
+	// mesh->setBlendShapes(buildMesh.BlendShapes);
+
+	// optimize number of material
+	// mesh->optimizeMaterialUsage(materialRemap);
+
+	// Store mesh in context
+	nodeContext.Shape = mesh;
+	return true;
 }
 
 /* end of file */

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

@@ -20,6 +20,6 @@
 struct CMeshUtilsContext;
 struct CNodeContext;
 
-void assimpShape(CMeshUtilsContext &context, CNodeContext &nodeContext);
+bool assimpShape(CMeshUtilsContext &context, CNodeContext &nodeContext);
 
 /* end of file */

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

@@ -47,7 +47,7 @@ void importShapes(CMeshUtilsContext &context, const aiNode *node)
 	{
 		CNodeContext &nodeContext = context.Nodes[node->mName.C_Str()];
 		CNodeMeta &nodeMeta = context.SceneMeta.Nodes[node->mName.C_Str()];
-		if (nodeMeta.ExportMesh == TMeshShape)
+		if (nodeMeta.ExportMesh == TMeshShape && nodeMeta.InstanceName.empty())
 		{
 			if (node->mNumMeshes)
 			{
@@ -232,7 +232,11 @@ int exportScene(const CMeshUtilsSettings &settings)
 	CDatabaseConfig::initTextureSearchDirectories();
 
 	Assimp::Importer importer;
-	const aiScene *scene = importer.ReadFile(settings.SourceFilePath, aiProcess_Triangulate | aiProcess_ValidateDataStructure); // aiProcess_SplitLargeMeshes | aiProcess_LimitBoneWeights
+	const aiScene *scene = importer.ReadFile(settings.SourceFilePath, 0
+		| aiProcess_Triangulate 
+		| aiProcess_ValidateDataStructure
+		| aiProcess_GenNormals // Or GenSmoothNormals? TODO: Validate smoothness between material boundaries!
+		); // aiProcess_SplitLargeMeshes | aiProcess_LimitBoneWeights
 	if (!scene)
 	{
 		const char *errs = importer.GetErrorString();
@@ -265,6 +269,9 @@ int exportScene(const CMeshUtilsSettings &settings)
 	// ]
 	// -- SKEL FLAG --
 
+	// TODO
+	// First import materials...
+
 	importShapes(context, context.InternalScene->mRootNode);
 
 	return EXIT_SUCCESS;

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

@@ -24,6 +24,8 @@
 
 #include <nel/misc/sstring.h>
 #include <nel/misc/tool_logger.h>
+#include <nel/misc/smart_ptr.h>
+#include <nel/misc/matrix.h>
 
 #ifndef NL_NODE_INTERNAL_TYPE
 #define NL_NODE_INTERNAL_TYPE void
@@ -32,6 +34,10 @@
 #define NL_SCENE_INTERNAL_TYPE void
 #endif
 
+namespace NL3D {
+	class IShape;
+}
+
 struct CNodeContext
 {
 	CNodeContext() :
@@ -43,6 +49,9 @@ struct CNodeContext
 
 	const NL_NODE_INTERNAL_TYPE *InternalNode;
 	bool IsBone;
+
+	// NLMISC::CMatrix Transform; // TODO
+	NLMISC::CRefPtr<NL3D::IShape> Shape;
 };
 
 typedef std::map<NLMISC::CSString, CNodeContext> TNodeContextMap;

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

@@ -28,7 +28,8 @@ using namespace NLMISC;
 CNodeMeta::CNodeMeta() :
 	AddToIG(true),
 	ExportMesh(TMeshShape),
-	ExportBone(TBoneAuto)
+	ExportBone(TBoneAuto),
+	AutoAnim(false)
 {
 
 }
@@ -42,6 +43,7 @@ void CNodeMeta::serial(NLMISC::IStream &s)
 	s.serial(InstanceShape);
 	s.serial(InstanceName);
 	s.serial(InstanceGroupName);
+	s.serial(AutoAnim);
 }
 
 CSceneMeta::CSceneMeta() :

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

@@ -32,6 +32,8 @@ enum TMesh
 	TMeshCollisionInt = 2,
 	TMeshCollisionExt = 3,
 	TMeshZone = 4,
+	TMeshPortal = 5,
+	TMeshCluster = 6,
 };
 
 enum TBone
@@ -53,6 +55,8 @@ struct CNodeMeta
 	std::string InstanceName;
 	std::string InstanceGroupName;
 
+	bool AutoAnim;
+
 	void serial(NLMISC::IStream &s);
 };