ModelsCache.cpp

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/*+-------------------------------------------------------------------------+
  |                       MultiVehicle simulator (libmvsim)                 |
  |                                                                         |
  | Copyright (C) 2014-2023  Jose Luis Blanco Claraco                       |
  | Copyright (C) 2017  Borys Tymchenko (Odessa Polytechnic University)     |
  | Distributed under 3-clause BSD License                                  |
  |   See COPYING                                                           |
  +-------------------------------------------------------------------------+ */

#include "ModelsCache.h"

#include <mrpt/core/get_env.h>
#include <mrpt/system/filesystem.h>
#include <mrpt/version.h>

#include <cstdlib>
#include <cstring>

using namespace mvsim;

ModelsCache& ModelsCache::Instance()
{
        static ModelsCache o;
        return o;
}

mrpt::opengl::CAssimpModel::Ptr ModelsCache::get(
        const std::string& localFileName, const Options& options)
{
        // already cached?
        if (auto it = cache.find(localFileName); it != cache.end())
                return it->second;

        // No, it's a new model path, create its placeholder:
        auto m = cache[localFileName] = mrpt::opengl::CAssimpModel::Create();

        ASSERT_FILE_EXISTS_(localFileName);

        // En/Dis-able the extra verbosity while loading the 3D model:
        int loadFlags = mrpt::opengl::CAssimpModel::LoadFlags::RealTimeMaxQuality |
                                        mrpt::opengl::CAssimpModel::LoadFlags::FlipUVs;

        if (options.modelColor != mrpt::img::TColor::white())
                loadFlags |= mrpt::opengl::CAssimpModel::LoadFlags::IgnoreMaterialColor;

        m->setColor_u8(options.modelColor);

        if (mrpt::get_env<bool>("MVSIM_LOAD_MODELS_VERBOSE", false))
                loadFlags |= mrpt::opengl::CAssimpModel::LoadFlags::Verbose;

        m->loadScene(localFileName, loadFlags);

        m->cullFaces(mrpt::typemeta::TEnumType<mrpt::opengl::TCullFace>::name2value(
                options.modelCull));

        return m;
}