assimp/test/unit/utObjImportExport.cpp

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#include "UnitTestPCH.h"
#include "SceneDiffer.h"

#include <assimp/Importer.hpp>
#include <assimp/scene.h>

using namespace Assimp;

static const float VertComponents[ 24 * 3 ] = {
    -0.500000,  0.500000,  0.500000,
    -0.500000,  0.500000, -0.500000,
    -0.500000, -0.500000, -0.500000,
    -0.500000, -0.500000,  0.500000,
    -0.500000, -0.500000, -0.500000,
     0.500000, -0.500000, -0.500000,
     0.500000, -0.500000,  0.500000,
    -0.500000, -0.500000,  0.500000,
    -0.500000,  0.500000, -0.500000,
     0.500000,  0.500000, -0.500000,
     0.500000, -0.500000, -0.500000,
    -0.500000, -0.500000, -0.500000,
     0.500000,  0.500000,  0.500000,
     0.500000,  0.500000, -0.500000,
    -0.500000,  0.500000, -0.500000,
    -0.500000,  0.500000,  0.500000,
     0.500000, -0.500000,  0.500000,
     0.500000,  0.500000,  0.500000,
    -0.500000,  0.500000,  0.500000,
    -0.500000, -0.500000,  0.500000,
     0.500000, -0.500000, -0.500000,
     0.500000,  0.500000, -0.500000,
     0.500000,  0.500000,  0.500000f,
     0.500000, -0.500000,  0.500000f
};

static const std::string ObjModel =
    "o 1\n"
    "\n"
    "# Vertex list\n"
    "\n"
    "v -0.5 -0.5  0.5\n"
    "v -0.5 -0.5 -0.5\n"
    "v -0.5  0.5 -0.5\n"
    "v -0.5  0.5  0.5\n"
    "v  0.5 -0.5  0.5\n"
    "v  0.5 -0.5 -0.5\n"
    "v  0.5  0.5 -0.5\n"
    "v  0.5  0.5  0.5\n"
    "\n"
    "# Point / Line / Face list\n"
    "\n"
    "usemtl Default\n"
    "f 4 3 2 1\n"
    "f 2 6 5 1\n"
    "f 3 7 6 2\n"
    "f 8 7 3 4\n"
    "f 5 8 4 1\n"
    "f 6 7 8 5\n"
    "\n"
    "# End of file\n";

class utObjImportExport : public ::testing::Test {
protected:
    virtual void SetUp() {
        m_im = new Assimp::Importer;
    }

    virtual void TearDown() {
        delete m_im;
        m_im = nullptr;
    }

    aiScene *createScene() {
        aiScene *expScene = new aiScene;
        expScene->mNumMeshes = 1;
        expScene->mMeshes = new aiMesh*[ 1 ];
        aiMesh *mesh = new aiMesh;
        mesh->mName.Set( "1" );
        mesh->mNumVertices = 24;
        mesh->mVertices = new aiVector3D[ 24 ];
        ::memcpy( &mesh->mVertices->x, &VertComponents[ 0 ], sizeof( float ) * 24 * 3 );
        mesh->mNumFaces = 6;
        mesh->mFaces = new aiFace[ mesh->mNumFaces ];

        mesh->mFaces[ 0 ].mNumIndices = 4;
        mesh->mFaces[ 0 ].mIndices = new unsigned int[ mesh->mFaces[ 0 ].mNumIndices ];
        mesh->mFaces[ 0 ].mIndices[ 0 ] = 0;
        mesh->mFaces[ 0 ].mIndices[ 1 ] = 1;
        mesh->mFaces[ 0 ].mIndices[ 2 ] = 2;
        mesh->mFaces[ 0 ].mIndices[ 3 ] = 3;

        mesh->mFaces[ 1 ].mNumIndices = 4;
        mesh->mFaces[ 1 ].mIndices = new unsigned int[ mesh->mFaces[ 0 ].mNumIndices ];
        mesh->mFaces[ 1 ].mIndices[ 0 ] = 4;
        mesh->mFaces[ 1 ].mIndices[ 1 ] = 5;
        mesh->mFaces[ 1 ].mIndices[ 2 ] = 6;
        mesh->mFaces[ 1 ].mIndices[ 3 ] = 7;

        mesh->mFaces[ 2 ].mNumIndices = 4;
        mesh->mFaces[ 2 ].mIndices = new unsigned int[ mesh->mFaces[ 0 ].mNumIndices ];
        mesh->mFaces[ 2 ].mIndices[ 0 ] = 8;
        mesh->mFaces[ 2 ].mIndices[ 1 ] = 9;
        mesh->mFaces[ 2 ].mIndices[ 2 ] = 10;
        mesh->mFaces[ 2 ].mIndices[ 3 ] = 11;

        mesh->mFaces[ 3 ].mNumIndices = 4;
        mesh->mFaces[ 3 ].mIndices = new unsigned int[ mesh->mFaces[ 0 ].mNumIndices ];
        mesh->mFaces[ 3 ].mIndices[ 0 ] = 12;
        mesh->mFaces[ 3 ].mIndices[ 1 ] = 13;
        mesh->mFaces[ 3 ].mIndices[ 2 ] = 14;
        mesh->mFaces[ 3 ].mIndices[ 3 ] = 15;

        mesh->mFaces[ 4 ].mNumIndices = 4;
        mesh->mFaces[ 4 ].mIndices = new unsigned int[ mesh->mFaces[ 0 ].mNumIndices ];
        mesh->mFaces[ 4 ].mIndices[ 0 ] = 16;
        mesh->mFaces[ 4 ].mIndices[ 1 ] = 17;
        mesh->mFaces[ 4 ].mIndices[ 2 ] = 18;
        mesh->mFaces[ 4 ].mIndices[ 3 ] = 19;

        mesh->mFaces[ 5 ].mNumIndices = 4;
        mesh->mFaces[ 5 ].mIndices = new unsigned int[ mesh->mFaces[ 0 ].mNumIndices ];
        mesh->mFaces[ 5 ].mIndices[ 0 ] = 20;
        mesh->mFaces[ 5 ].mIndices[ 1 ] = 21;
        mesh->mFaces[ 5 ].mIndices[ 2 ] = 22;
        mesh->mFaces[ 5 ].mIndices[ 3 ] = 23;

        expScene->mMeshes[ 0 ] = mesh;

        expScene->mNumMaterials = 1;
        expScene->mMaterials = new aiMaterial*[ expScene->mNumMaterials ];

        return expScene;
    }

protected:
    Assimp::Importer *m_im;
    aiScene *m_expectedScene;
};

TEST_F( utObjImportExport, obj_import_test ) {
    const aiScene *scene = m_im->ReadFileFromMemory( (void*) ObjModel.c_str(), ObjModel.size(), 0 );
    aiScene *expected = createScene();
    EXPECT_NE( nullptr, scene );

    SceneDiffer differ;
    EXPECT_TRUE( differ.isEqual( expected, scene ) );
    differ.showReport();

    m_im->FreeScene();
}