khanat-opennel-code/code/nel/tools/3d/mesh_utils/assimp_material.cpp

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// 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/>.
#include <nel/misc/types_nl.h>
#include "assimp_shape.h"
#include <assimp/postprocess.h>
#include <assimp/scene.h>
#include <assimp/Importer.hpp>
#define NL_NODE_INTERNAL_TYPE aiNode
#define NL_SCENE_INTERNAL_TYPE aiScene
#include "scene_context.h"
#include <nel/misc/debug.h>
#include <nel/misc/path.h>
#include <nel/pipeline/tool_logger.h>
#include <nel/3d/mesh.h>
#include <nel/3d/texture_file.h>
using namespace std;
using namespace NLMISC;
using namespace NL3D;
// http://assimp.sourceforge.net/lib_html/materials.html
inline CRGBA convColor(const aiColor3D &ac, uint8 a = 255)
{
return CRGBA(ac.r * 255.99f, ac.g * 255.99f, ac.b * 255.99f);
}
inline CRGBA convColor(const aiColor4D &ac)
{
return CRGBA(ac.r * 255.99f, ac.g * 255.99f, ac.b * 255.99f, ac.a * 255.99f);
}
void assimpMaterial(NL3D::CMaterial &mat, CMeshUtilsContext &context, const aiMaterial *am)
{
aiString amname;
if (am->Get(AI_MATKEY_NAME, amname) != aiReturn_SUCCESS)
amname = "";
mat.initLighted();
mat.setShader(CMaterial::Normal);
int i;
float f;
aiColor3D c3;
aiColor4D c4;
if (am->Get(AI_MATKEY_TWOSIDED, i) == aiReturn_SUCCESS)
mat.setDoubleSided(i != 0);
if (am->Get(AI_MATKEY_BLEND_FUNC, i) == aiReturn_SUCCESS) switch ((aiBlendMode)i)
{
case aiBlendMode_Default:
mat.setSrcBlend(CMaterial::srcalpha);
mat.setDstBlend(CMaterial::invsrcalpha);
break;
case aiBlendMode_Additive:
mat.setSrcBlend(CMaterial::one);
mat.setDstBlend(CMaterial::one);
break;
}
// Colors follow GL convention
// "While the ambient, diffuse, specular and emission
// "material parameters all have alpha components, only the diffuse"
// "alpha component is used in the lighting computation."
if (am->Get(AI_MATKEY_COLOR_DIFFUSE, c3) == aiReturn_SUCCESS)
mat.setDiffuse(convColor(c3));
if (am->Get(AI_MATKEY_OPACITY, f) == aiReturn_SUCCESS)
mat.setOpacity(f * 255.99f);
if (am->Get(AI_MATKEY_COLOR_AMBIENT, c3) == aiReturn_SUCCESS)
mat.setAmbient(convColor(c3));
if (am->Get(AI_MATKEY_SHININESS, f) == aiReturn_SUCCESS)
mat.setShininess(f); // (float)pow(2.0, f * 10.0) * 4.f;
if (am->Get(AI_MATKEY_COLOR_SPECULAR, c3) == aiReturn_SUCCESS)
mat.setSpecular(convColor(c3));
if (am->Get(AI_MATKEY_SHININESS_STRENGTH, f) == aiReturn_SUCCESS)
mat.setSpecular(CRGBAF(mat.getSpecular()) * f);
else
mat.setSpecular(NLMISC::CRGBA::Black);
if (am->Get(AI_MATKEY_COLOR_EMISSIVE, c3) == aiReturn_SUCCESS)
mat.setEmissive(convColor(c3));
// Textures
unsigned int texCount = am->GetTextureCount(aiTextureType_DIFFUSE);
if (texCount > IDRV_MAT_MAXTEXTURES)
{
tlwarning(context.ToolLogger, context.Settings.SourceFilePath.c_str(),
"Material '%s' has more than %i textures (%i textures found)", amname.C_Str(), IDRV_MAT_MAXTEXTURES, texCount);
texCount = IDRV_MAT_MAXTEXTURES;
}
for (unsigned int ti = 0; ti < texCount; ++ti)
{
aiString path;
aiTextureMapping mapping;
unsigned int uvindex;
float blend; // Partially supported
aiTextureOp op;
aiTextureMapMode mapmode;
if (am->GetTexture(aiTextureType_DIFFUSE, ti, &path, &mapping, &uvindex, &blend, &op, &mapmode) != aiReturn_SUCCESS)
{
tlerror(context.ToolLogger, context.Settings.SourceFilePath.c_str(),
"Failed to get texture %i in material '%s'", ti, amname.C_Str());
break;
}
std::string fileName = CFile::getFilename(CPath::standardizePath(path.C_Str(), false));
std::string knownPath = CPath::lookup(fileName, false, false, false);
if (knownPath.empty())
{
tlwarning(context.ToolLogger, context.Settings.SourceFilePath.c_str(),
"Texture '%s' referenced in material '%s' but not found in the database search paths", fileName.c_str(), amname.C_Str());
}
// NeL supports bitmap and cubemap, but we import only basic bitmap here. Cubemap can be inserted from the mesh editor tool
// NeL also has fancy multi-bitmap thing to switch between summer and winter and so on. Same story
CSmartPtr<CTextureFile> tex = new CTextureFile();
tex->setFileName(fileName);
tex->setWrapS(mapmode == aiTextureMapMode_Clamp ? ITexture::Clamp : ITexture::Repeat);
tex->setWrapT(mapmode == aiTextureMapMode_Clamp ? ITexture::Clamp : ITexture::Repeat);
mat.setTexture(ti, tex);
// TODO uvindex for uv routing (probably necessary during shape import - if so also need to also ask the uv channel in the editor and store in meta)
// TODO aiTextureMapping texcoordgen if useful to import
mat.texEnvArg0Alpha(ti, CMaterial::Texture, CMaterial::SrcAlpha);
mat.texEnvArg0RGB(ti, CMaterial::Texture, CMaterial::SrcColor);
mat.texEnvArg1Alpha(ti, ti == 0 ? CMaterial::Diffuse : CMaterial::Previous, CMaterial::SrcAlpha);
mat.texEnvArg1RGB(ti, ti == 0 ? CMaterial::Diffuse : CMaterial::Previous, CMaterial::SrcColor);
switch (op)
{
case aiTextureOp_Multiply:
default:
mat.texEnvOpAlpha(ti, CMaterial::Modulate);
mat.texEnvOpRGB(ti, CMaterial::Modulate);
break;
case aiTextureOp_Add:
mat.texEnvOpAlpha(ti, CMaterial::Add);
mat.texEnvOpRGB(ti, CMaterial::Add);
break;
case aiTextureOp_Subtract:
mat.texEnvArg0Alpha(ti, CMaterial::Texture, CMaterial::InvSrcAlpha);
mat.texEnvArg0RGB(ti, CMaterial::Texture, CMaterial::InvSrcColor);
mat.texEnvOpAlpha(ti, CMaterial::Add);
mat.texEnvOpRGB(ti, CMaterial::Add);
break;
case aiTextureOp_SignedAdd:
mat.texEnvOpAlpha(ti, CMaterial::AddSigned);
mat.texEnvOpRGB(ti, CMaterial::AddSigned);
break;
}
}
}
CSmartPtr<CMaterial> assimpMaterial(CMeshUtilsContext &context, const aiMaterial *am)
{
CSmartPtr<CMaterial> matp = new CMaterial();
CMaterial &mat = *matp;
assimpMaterial(mat, context, am);
return matp;
}
void assimpMaterials(CMeshUtilsContext &context)
{
set<CSString> materialNames;
const aiScene *scene = context.InternalScene;
for (unsigned int mi = 0; mi < scene->mNumMaterials; ++mi)
{
const aiMaterial *am = scene->mMaterials[mi];
for (unsigned int pi = 0; pi < am->mNumProperties; ++pi) // DEBUG
{ // DEBUG
const aiMaterialProperty *amp = am->mProperties[pi];
printf("%s\n", amp->mKey.C_Str());
} // DEBUG
aiString amname;
if (am->Get(AI_MATKEY_NAME, amname) != aiReturn_SUCCESS)
{
tlerror(context.ToolLogger, context.Settings.SourceFilePath.c_str(),
"Material has no name");
continue;
}
if (materialNames.find(amname.C_Str()) != materialNames.end())
{
tlerror(context.ToolLogger, context.Settings.SourceFilePath.c_str(),
"Material name '%s' used more than once", amname.C_Str());
continue;
}
if (context.SceneMeta.Materials.find(amname.C_Str())
== context.SceneMeta.Materials.end())
{
materialNames.insert(amname.C_Str());
context.SceneMeta.Materials[amname.C_Str()] = assimpMaterial(context, am);
}
}
}
/* end of file */