khanat-code-old/code/nel/tools/3d/mesh_utils/mesh_utils.cpp

157 lines
4.1 KiB
C++
Raw Normal View History

2015-09-19 15:14:35 +00:00
// NeL - MMORPG Framework <http://dev.ryzom.com/projects/nel/>
// Copyright (C) 2015 Winch Gate Property Limited
// Author: Jan Boon <jan.boon@kaetemi.be>
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as
// published by the Free Software Foundation, either version 3 of the
// License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
2015-09-19 16:08:25 +00:00
#include <nel/misc/types_nl.h>
#include "mesh_utils.h"
2015-09-19 17:35:57 +00:00
#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
2015-09-19 15:14:35 +00:00
{
2015-09-19 17:35:57 +00:00
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);
2015-09-19 16:08:25 +00:00
return EXIT_SUCCESS;
2015-09-19 15:14:35 +00:00
}
/* end of file */