assimp/test/unit/utglTF2ImportExport.cpp

/*
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Open Asset Import Library (assimp)
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Copyright (c) 2006-2018, assimp team



All rights reserved.

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*/
#include "UnitTestPCH.h"
#include "AbstractImportExportBase.h"

#include <assimp/Importer.hpp>
#include <assimp/Exporter.hpp>
#include <assimp/postprocess.h>
#include <assimp/scene.h>
#include <array>

using namespace Assimp;

class utglTF2ImportExport : public AbstractImportExportBase {
public:
    virtual bool importerTest() {
        Assimp::Importer importer;
        const aiScene *scene = importer.ReadFile( ASSIMP_TEST_MODELS_DIR "/glTF2/BoxTextured-glTF/BoxTextured.gltf", aiProcess_ValidateDataStructure);
        EXPECT_NE( scene, nullptr );
        if ( !scene ) return false;

        EXPECT_TRUE( scene->HasMaterials() );
        if ( !scene->HasMaterials() ) return false;
        const aiMaterial *material = scene->mMaterials[0];

        aiString path;
        aiTextureMapMode modes[2];
        EXPECT_EQ( aiReturn_SUCCESS, material->GetTexture(aiTextureType_DIFFUSE, 0, &path, nullptr, nullptr, nullptr, nullptr, modes) );
        EXPECT_STREQ( path.C_Str(), "CesiumLogoFlat.png" );
        EXPECT_EQ( modes[0], aiTextureMapMode_Mirror );
        EXPECT_EQ( modes[1], aiTextureMapMode_Clamp );

        return true;
    }

    virtual bool binaryImporterTest() {
        Assimp::Importer importer;
        const aiScene *scene = importer.ReadFile( ASSIMP_TEST_MODELS_DIR "/glTF2/2CylinderEngine-glTF-Binary/2CylinderEngine.glb", aiProcess_ValidateDataStructure);
        return nullptr != scene;
    }

#ifndef ASSIMP_BUILD_NO_EXPORT
    virtual bool exporterTest() {
        Assimp::Importer importer;
        Assimp::Exporter exporter;
        const aiScene *scene = importer.ReadFile( ASSIMP_TEST_MODELS_DIR "/glTF2/BoxTextured-glTF/BoxTextured.gltf", aiProcess_ValidateDataStructure );
        EXPECT_NE( nullptr, scene );
        EXPECT_EQ( aiReturn_SUCCESS, exporter.Export( scene, "gltf2", ASSIMP_TEST_MODELS_DIR "/glTF2/BoxTextured-glTF/BoxTextured_out.gltf" ) );

        return true;
    }
#endif // ASSIMP_BUILD_NO_EXPORT

};

TEST_F( utglTF2ImportExport, importglTF2FromFileTest ) {
    EXPECT_TRUE( importerTest() );
}

TEST_F( utglTF2ImportExport, importBinaryglTF2FromFileTest ) {
    EXPECT_TRUE( binaryImporterTest() );
}

#ifndef ASSIMP_BUILD_NO_EXPORT
TEST_F(utglTF2ImportExport, importglTF2AndExportToOBJ) {
    Assimp::Importer importer;
    Assimp::Exporter exporter;
    const aiScene *scene = importer.ReadFile(ASSIMP_TEST_MODELS_DIR "/glTF2/BoxTextured-glTF/BoxTextured.gltf", aiProcess_ValidateDataStructure);
    EXPECT_NE(nullptr, scene);
    EXPECT_EQ(aiReturn_SUCCESS, exporter.Export(scene, "obj", ASSIMP_TEST_MODELS_DIR "/glTF2/BoxTextured-glTF/BoxTextured_out.obj"));
}

TEST_F(utglTF2ImportExport, importglTF2EmbeddedAndExportToOBJ) {
    Assimp::Importer importer;
    Assimp::Exporter exporter;
    const aiScene *scene = importer.ReadFile(ASSIMP_TEST_MODELS_DIR "/glTF2/BoxTextured-glTF-Embedded/BoxTextured.gltf", aiProcess_ValidateDataStructure);
    EXPECT_NE(nullptr, scene);
    EXPECT_EQ(aiReturn_SUCCESS, exporter.Export(scene, "obj", ASSIMP_TEST_MODELS_DIR "/glTF2/BoxTextured-glTF-Embedded/BoxTextured_out.obj"));
}
#endif // ASSIMP_BUILD_NO_EXPORT

TEST_F(utglTF2ImportExport, importglTF2PrimitiveModePointsWithoutIndices) {
    Assimp::Importer importer;
    //Points without indices
    const aiScene *scene = importer.ReadFile(ASSIMP_TEST_MODELS_DIR "/glTF2/glTF-Asset-Generator/Mesh_PrimitiveMode/Mesh_PrimitiveMode_00.gltf", aiProcess_ValidateDataStructure);
    EXPECT_NE(nullptr, scene);
    EXPECT_EQ(scene->mMeshes[0]->mNumVertices, 1024);
    for (unsigned int i = 0; i < scene->mMeshes[0]->mNumFaces; ++i)
    {
        EXPECT_EQ(scene->mMeshes[0]->mFaces[i].mNumIndices, 1);
        EXPECT_EQ(scene->mMeshes[0]->mFaces[i].mIndices[0], i);
    }
}

TEST_F(utglTF2ImportExport, importglTF2PrimitiveModeLinesWithoutIndices) {
    Assimp::Importer importer;
    //Lines without indices
    const aiScene *scene = importer.ReadFile(ASSIMP_TEST_MODELS_DIR "/glTF2/glTF-Asset-Generator/Mesh_PrimitiveMode/Mesh_PrimitiveMode_01.gltf", aiProcess_ValidateDataStructure);
    EXPECT_NE(nullptr, scene);
    EXPECT_EQ(scene->mMeshes[0]->mNumVertices, 8);
    for (unsigned int i = 0; i < scene->mMeshes[0]->mNumFaces; ++i)
    {
        EXPECT_EQ(scene->mMeshes[0]->mFaces[i].mNumIndices, 2);
        EXPECT_EQ(scene->mMeshes[0]->mFaces[i].mIndices[0], i*2);
        EXPECT_EQ(scene->mMeshes[0]->mFaces[i].mIndices[1], i*2 + 1);
    }
}

TEST_F(utglTF2ImportExport, importglTF2PrimitiveModeLinesLoopWithoutIndices) {
    Assimp::Importer importer;
    //Lines loop without indices
    const aiScene *scene = importer.ReadFile(ASSIMP_TEST_MODELS_DIR "/glTF2/glTF-Asset-Generator/Mesh_PrimitiveMode/Mesh_PrimitiveMode_02.gltf", aiProcess_ValidateDataStructure);
    EXPECT_NE(nullptr, scene);
    EXPECT_EQ(scene->mMeshes[0]->mNumVertices, 4);

    std::array<int, 5> l1 = {{ 0, 1, 2, 3, 0 }};
    EXPECT_EQ(scene->mMeshes[0]->mFaces[0].mNumIndices, 2);
    for (unsigned int i = 0; i < scene->mMeshes[0]->mNumFaces; ++i)
    {
        EXPECT_EQ(scene->mMeshes[0]->mFaces[i].mNumIndices, 2);
        EXPECT_EQ(scene->mMeshes[0]->mFaces[i].mIndices[0], l1[i]);
        EXPECT_EQ(scene->mMeshes[0]->mFaces[i].mIndices[1], l1[i + 1]);
    }
}

TEST_F(utglTF2ImportExport, importglTF2PrimitiveModeLinesStripWithoutIndices) {
    Assimp::Importer importer;
    //Lines strip without indices
    const aiScene *scene = importer.ReadFile(ASSIMP_TEST_MODELS_DIR "/glTF2/glTF-Asset-Generator/Mesh_PrimitiveMode/Mesh_PrimitiveMode_03.gltf", aiProcess_ValidateDataStructure);
    EXPECT_NE(nullptr, scene);
    EXPECT_EQ(scene->mMeshes[0]->mNumVertices, 5);

    EXPECT_EQ(scene->mMeshes[0]->mFaces[0].mNumIndices, 2);
    for (unsigned int i = 0; i < scene->mMeshes[0]->mNumFaces; ++i)
    {
        EXPECT_EQ(scene->mMeshes[0]->mFaces[i].mNumIndices, 2);
        EXPECT_EQ(scene->mMeshes[0]->mFaces[i].mIndices[0], i);
        EXPECT_EQ(scene->mMeshes[0]->mFaces[i].mIndices[1], i + 1);
    }
}

TEST_F(utglTF2ImportExport, importglTF2PrimitiveModeTrianglesStripWithoutIndices) {
    Assimp::Importer importer;
    //Triangles strip without indices
    const aiScene *scene = importer.ReadFile(ASSIMP_TEST_MODELS_DIR "/glTF2/glTF-Asset-Generator/Mesh_PrimitiveMode/Mesh_PrimitiveMode_04.gltf", aiProcess_ValidateDataStructure);
    EXPECT_NE(nullptr, scene);
    EXPECT_EQ(scene->mMeshes[0]->mNumFaces, 2);
    EXPECT_EQ(scene->mMeshes[0]->mNumVertices, 4);
    std::array<int, 3> f1 = {{ 0, 1, 2 }};
    EXPECT_EQ(scene->mMeshes[0]->mFaces[0].mNumIndices, 3);
    for (int i = 0; i < 3; ++i)
    {
        EXPECT_EQ(scene->mMeshes[0]->mFaces[0].mIndices[i], f1[i]);
    }

    std::array<int, 3> f2 = {{ 2, 1, 3 }};
    EXPECT_EQ(scene->mMeshes[0]->mFaces[1].mNumIndices, 3);
    for (int i = 0; i < 3; ++i)
    {
        EXPECT_EQ(scene->mMeshes[0]->mFaces[1].mIndices[i], f2[i]);
    }
}

TEST_F(utglTF2ImportExport, importglTF2PrimitiveModeTrianglesFanWithoutIndices) {
    Assimp::Importer importer;
    //Triangles fan without indices
    const aiScene *scene = importer.ReadFile(ASSIMP_TEST_MODELS_DIR "/glTF2/glTF-Asset-Generator/Mesh_PrimitiveMode/Mesh_PrimitiveMode_05.gltf", aiProcess_ValidateDataStructure);
    EXPECT_NE(nullptr, scene);
    EXPECT_EQ(scene->mMeshes[0]->mNumFaces, 2);
    EXPECT_EQ(scene->mMeshes[0]->mNumVertices, 4);
    std::array<int, 3> f1 = {{ 0, 1, 2 }};
    EXPECT_EQ(scene->mMeshes[0]->mFaces[0].mNumIndices, 3);
    for (int i = 0; i < 3; ++i)
    {
        EXPECT_EQ(scene->mMeshes[0]->mFaces[0].mIndices[i], f1[i]);
    }

    std::array<int, 3> f2 = {{ 0, 2, 3 }};
    EXPECT_EQ(scene->mMeshes[0]->mFaces[1].mNumIndices, 3);
    for (int i = 0; i < 3; ++i)
    {
        EXPECT_EQ(scene->mMeshes[0]->mFaces[1].mIndices[i], f2[i]);
    }
}

TEST_F(utglTF2ImportExport, importglTF2PrimitiveModeTrianglesWithoutIndices) {
    Assimp::Importer importer;
    //Triangles without indices
    const aiScene *scene = importer.ReadFile(ASSIMP_TEST_MODELS_DIR "/glTF2/glTF-Asset-Generator/Mesh_PrimitiveMode/Mesh_PrimitiveMode_06.gltf", aiProcess_ValidateDataStructure);
    EXPECT_NE(nullptr, scene);
    EXPECT_EQ(scene->mMeshes[0]->mNumFaces, 2);
    EXPECT_EQ(scene->mMeshes[0]->mNumVertices, 6);
    std::array<int, 3> f1 = {{ 0, 1, 2 }};
    EXPECT_EQ(scene->mMeshes[0]->mFaces[0].mNumIndices, 3);
    for (int i = 0; i < 3; ++i)
    {
        EXPECT_EQ(scene->mMeshes[0]->mFaces[0].mIndices[i], f1[i]);
    }

    std::array<int, 3> f2 = {{ 3, 4, 5 }};
    EXPECT_EQ(scene->mMeshes[0]->mFaces[1].mNumIndices, 3);
    for (int i = 0; i < 3; ++i)
    {
        EXPECT_EQ(scene->mMeshes[0]->mFaces[1].mIndices[i], f2[i]);
    }
}

TEST_F(utglTF2ImportExport, importglTF2PrimitiveModePoints) {
    Assimp::Importer importer;
    //Line loop
    const aiScene *scene = importer.ReadFile(ASSIMP_TEST_MODELS_DIR "/glTF2/glTF-Asset-Generator/Mesh_PrimitiveMode/Mesh_PrimitiveMode_07.gltf", aiProcess_ValidateDataStructure);
    EXPECT_NE(nullptr, scene);
    EXPECT_EQ(scene->mMeshes[0]->mNumVertices, 1024);
    for (unsigned int i = 0; i < scene->mMeshes[0]->mNumFaces; ++i)
    {
        EXPECT_EQ(scene->mMeshes[0]->mFaces[i].mNumIndices, 1);
        EXPECT_EQ(scene->mMeshes[0]->mFaces[i].mIndices[0], i);
    }
}

TEST_F(utglTF2ImportExport, importglTF2PrimitiveModeLines) {
    Assimp::Importer importer;
    //Lines
    const aiScene *scene = importer.ReadFile(ASSIMP_TEST_MODELS_DIR "/glTF2/glTF-Asset-Generator/Mesh_PrimitiveMode/Mesh_PrimitiveMode_08.gltf", aiProcess_ValidateDataStructure);
    EXPECT_NE(nullptr, scene);
    EXPECT_EQ(scene->mMeshes[0]->mNumVertices, 4);
    std::array<int, 5> l1 = {{ 0, 3, 2, 1, 0 }};
    EXPECT_EQ(scene->mMeshes[0]->mFaces[0].mNumIndices, 2);
    for (unsigned int i = 0; i < scene->mMeshes[0]->mNumFaces; ++i)
    {
        EXPECT_EQ(scene->mMeshes[0]->mFaces[i].mIndices[0], l1[i]);
        EXPECT_EQ(scene->mMeshes[0]->mFaces[i].mIndices[1], l1[i + 1]);
    }
}

TEST_F(utglTF2ImportExport, importglTF2PrimitiveModeLineLoop) {
    Assimp::Importer importer;
    //Line loop
    const aiScene *scene = importer.ReadFile(ASSIMP_TEST_MODELS_DIR "/glTF2/glTF-Asset-Generator/Mesh_PrimitiveMode/Mesh_PrimitiveMode_09.gltf", aiProcess_ValidateDataStructure);
    EXPECT_NE(nullptr, scene);
    EXPECT_EQ(scene->mMeshes[0]->mNumVertices, 4);
    std::array<int, 5> l1 = {{ 0, 3, 2, 1, 0 }};
    EXPECT_EQ(scene->mMeshes[0]->mFaces[0].mNumIndices, 2);
    for (unsigned int i = 0; i < scene->mMeshes[0]->mNumFaces; ++i)
    {
        EXPECT_EQ(scene->mMeshes[0]->mFaces[i].mIndices[0], l1[i]);
        EXPECT_EQ(scene->mMeshes[0]->mFaces[i].mIndices[1], l1[i+1]);
    }
}

TEST_F(utglTF2ImportExport, importglTF2PrimitiveModeLineStrip) {
    Assimp::Importer importer;
    //Lines Strip
    const aiScene *scene = importer.ReadFile(ASSIMP_TEST_MODELS_DIR "/glTF2/glTF-Asset-Generator/Mesh_PrimitiveMode/Mesh_PrimitiveMode_10.gltf", aiProcess_ValidateDataStructure);
    EXPECT_NE(nullptr, scene);
    EXPECT_EQ(scene->mMeshes[0]->mNumVertices, 4);
    std::array<int, 5> l1 = {{ 0, 3, 2, 1, 0 }};
    EXPECT_EQ(scene->mMeshes[0]->mFaces[0].mNumIndices, 2);
    for (unsigned int i = 0; i < scene->mMeshes[0]->mNumFaces; ++i)
    {
        EXPECT_EQ(scene->mMeshes[0]->mFaces[i].mIndices[0], l1[i]);
        EXPECT_EQ(scene->mMeshes[0]->mFaces[i].mIndices[1], l1[i + 1]);
    }
}

TEST_F(utglTF2ImportExport, importglTF2PrimitiveModeTrianglesStrip) {
    Assimp::Importer importer;
    //Triangles strip
    const aiScene *scene = importer.ReadFile(ASSIMP_TEST_MODELS_DIR "/glTF2/glTF-Asset-Generator/Mesh_PrimitiveMode/Mesh_PrimitiveMode_11.gltf", aiProcess_ValidateDataStructure);
    EXPECT_NE(nullptr, scene);
    EXPECT_EQ(scene->mMeshes[0]->mNumFaces, 2);
    EXPECT_EQ(scene->mMeshes[0]->mNumVertices, 4);
    std::array<int, 3> f1 = {{ 0, 3, 1 }};
    EXPECT_EQ(scene->mMeshes[0]->mFaces[0].mNumIndices, 3);
    for (int i = 0; i < 3; ++i)
    {
        EXPECT_EQ(scene->mMeshes[0]->mFaces[0].mIndices[i], f1[i]);
    }

    std::array<int, 3> f2 = {{ 1, 3, 2 }};
    EXPECT_EQ(scene->mMeshes[0]->mFaces[1].mNumIndices, 3);
    for (int i = 0; i < 3; ++i)
    {
        EXPECT_EQ(scene->mMeshes[0]->mFaces[1].mIndices[i], f2[i]);
    }
}

TEST_F(utglTF2ImportExport, importglTF2PrimitiveModeTrianglesFan) {
    Assimp::Importer importer;
    //Triangles fan
    const aiScene *scene = importer.ReadFile(ASSIMP_TEST_MODELS_DIR "/glTF2/glTF-Asset-Generator/Mesh_PrimitiveMode/Mesh_PrimitiveMode_12.gltf", aiProcess_ValidateDataStructure);
    EXPECT_NE(nullptr, scene);
    EXPECT_EQ(scene->mMeshes[0]->mNumVertices, 4);
    EXPECT_EQ(scene->mMeshes[0]->mNumFaces, 2);
    std::array<int, 3> f1 = {{ 0, 3, 2 }};
    EXPECT_EQ(scene->mMeshes[0]->mFaces[0].mNumIndices, 3);
    for (int i = 0; i < 3; ++i)
    {
        EXPECT_EQ(scene->mMeshes[0]->mFaces[0].mIndices[i], f1[i]);
    }

    std::array<int, 3> f2 = {{ 0, 2, 1 }};
    EXPECT_EQ(scene->mMeshes[0]->mFaces[1].mNumIndices, 3);
    for (int i = 0; i < 3; ++i)
    {
        EXPECT_EQ(scene->mMeshes[0]->mFaces[1].mIndices[i], f2[i]);
    }
}

#ifndef ASSIMP_BUILD_NO_EXPORT
TEST_F( utglTF2ImportExport, exportglTF2FromFileTest ) {
    EXPECT_TRUE( exporterTest() );
}

#endif // ASSIMP_BUILD_NO_EXPORT