Method GetMemoryRequirements

code/Common/Importer.cpp:1179–1279

------------------------------------------------------------------------------------------------ Get the memory requirements of the scene

// ------------------------------------------------------------------------------------------------
// Get the memory requirements of the scene
void Importer::GetMemoryRequirements(aiMemoryInfo& in) const {
    ai_assert(nullptr != pimpl);

    in = aiMemoryInfo();
    aiScene* mScene = pimpl->mScene;

    // return if we have no scene loaded
    if (!mScene)
        return;

    in.total = sizeof(aiScene);

    // add all meshes
    for (unsigned int i = 0; i < mScene->mNumMeshes;++i) {
        in.meshes += sizeof(aiMesh);
        if (mScene->mMeshes[i]->HasPositions()) {
            in.meshes += sizeof(aiVector3D) * mScene->mMeshes[i]->mNumVertices;
        }

        if (mScene->mMeshes[i]->HasNormals()) {
            in.meshes += sizeof(aiVector3D) * mScene->mMeshes[i]->mNumVertices;
        }

        if (mScene->mMeshes[i]->HasTangentsAndBitangents()) {
            in.meshes += sizeof(aiVector3D) * mScene->mMeshes[i]->mNumVertices * 2;
        }

        for (unsigned int a = 0; a < AI_MAX_NUMBER_OF_COLOR_SETS;++a) {
            if (mScene->mMeshes[i]->HasVertexColors(a)) {
                in.meshes += sizeof(aiColor4D) * mScene->mMeshes[i]->mNumVertices;
            } else {
                break;
            }
        }
        for (unsigned int a = 0; a < AI_MAX_NUMBER_OF_TEXTURECOORDS;++a) {
            if (mScene->mMeshes[i]->HasTextureCoords(a)) {
                in.meshes += sizeof(aiVector3D) * mScene->mMeshes[i]->mNumVertices;
            } else {
                break;
            }
        }
        if (mScene->mMeshes[i]->HasBones()) {
            in.meshes += sizeof(void*) * mScene->mMeshes[i]->mNumBones;
            for (unsigned int p = 0; p < mScene->mMeshes[i]->mNumBones;++p) {
                in.meshes += sizeof(aiBone);
                in.meshes += mScene->mMeshes[i]->mBones[p]->mNumWeights * sizeof(aiVertexWeight);
            }
        }
        in.meshes += (sizeof(aiFace) + 3 * sizeof(unsigned int))*mScene->mMeshes[i]->mNumFaces;
    }
    in.total += in.meshes;

    // add all embedded textures
    for (unsigned int i = 0; i < mScene->mNumTextures;++i) {
        const aiTexture* pc = mScene->mTextures[i];
        in.textures += sizeof(aiTexture);
        if (pc->mHeight) {
            in.textures += 4 * pc->mHeight * pc->mWidth;