assimp/test/unit/utSTLImportExport.cpp

/*
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Open Asset Import Library (assimp)
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*/

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

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

#include <vector>

using namespace Assimp;

class utSTLImporterExporter : public AbstractImportExportBase {
public:
    virtual bool importerTest() {
        Assimp::Importer importer;
        const aiScene *scene = importer.ReadFile( ASSIMP_TEST_MODELS_DIR "/STL/Spider_ascii.stl", aiProcess_ValidateDataStructure );
        return nullptr != scene;
    }
};

TEST_F( utSTLImporterExporter, importSTLFromFileTest ) {
    EXPECT_TRUE( importerTest() );
}


TEST_F(utSTLImporterExporter, test_multiple) {
    // import same file twice, each with its own importer
    // must work both times and not crash
    Assimp::Importer importer1;
    const aiScene *scene1 = importer1.ReadFile( ASSIMP_TEST_MODELS_DIR "/STL/Spider_ascii.stl", aiProcess_ValidateDataStructure );
    EXPECT_NE(nullptr, scene1);

    Assimp::Importer importer2;
    const aiScene *scene2 = importer2.ReadFile( ASSIMP_TEST_MODELS_DIR "/STL/Spider_ascii.stl", aiProcess_ValidateDataStructure );
    EXPECT_NE(nullptr, scene2);
}

TEST_F(utSTLImporterExporter, importSTLformatdetection) {
    ::Assimp::Importer importer;
    const aiScene *scene = importer.ReadFile(ASSIMP_TEST_MODELS_DIR "/STL/formatDetection", aiProcess_ValidateDataStructure);

    EXPECT_NE(nullptr, scene);
}

TEST_F( utSTLImporterExporter, test_with_two_solids ) {
    Assimp::Importer importer;
    const aiScene *scene = importer.ReadFile( ASSIMP_TEST_MODELS_DIR "/STL/triangle_with_two_solids.stl", aiProcess_ValidateDataStructure );
    EXPECT_NE( nullptr, scene );
}

TEST_F(utSTLImporterExporter, test_with_empty_solid) {
    Assimp::Importer importer;
    //STL File with empty mesh. We should still be able to import other meshes in this file. ValidateDataStructure should fail.
    const aiScene *scene = importer.ReadFile(ASSIMP_TEST_MODELS_DIR "/STL/triangle_with_empty_solid.stl", 0);
    EXPECT_NE(nullptr, scene);

    const aiScene *scene2 = importer.ReadFile(ASSIMP_TEST_MODELS_DIR "/STL/triangle_with_empty_solid.stl", aiProcess_ValidateDataStructure);
    EXPECT_EQ(nullptr, scene2);
}

#ifndef ASSIMP_BUILD_NO_EXPORT

TEST_F(utSTLImporterExporter, exporterTest) {
    Assimp::Importer importer;
    const aiScene *scene = importer.ReadFile(ASSIMP_TEST_MODELS_DIR "/STL/Spider_ascii.stl", aiProcess_ValidateDataStructure);

    Assimp::Exporter mAiExporter;
    mAiExporter.Export( scene, "stl", "spiderExport.stl" );

    const aiScene *scene2 = importer.ReadFile("spiderExport.stl", aiProcess_ValidateDataStructure);
    EXPECT_NE(nullptr, scene2);
}

TEST_F(utSTLImporterExporter, test_export_pointclouds) {
    struct XYZ {
        float x, y, z;
    };

    std::vector<XYZ> points;

    for (size_t i = 0; i < 10; ++i) {
        XYZ current;
        current.x = static_cast<float>(i);
        current.y = static_cast<float>(i);
        current.z = static_cast<float>(i);
        points.push_back(current);
    }
    aiScene scene;
    scene.mRootNode = new aiNode();

    scene.mMeshes = new aiMesh*[1];
    scene.mMeshes[0] = nullptr;
    scene.mNumMeshes = 1;

    scene.mMaterials = new aiMaterial*[1];
    scene.mMaterials[0] = nullptr;
    scene.mNumMaterials = 1;

    scene.mMaterials[0] = new aiMaterial();

    scene.mMeshes[0] = new aiMesh();
    scene.mMeshes[0]->mMaterialIndex = 0;

    scene.mRootNode->mMeshes = new unsigned int[1];
    scene.mRootNode->mMeshes[0] = 0;
    scene.mRootNode->mNumMeshes = 1;

    auto pMesh = scene.mMeshes[0];

    size_t numValidPoints = points.size();

    pMesh->mVertices = new aiVector3D[numValidPoints];
    pMesh->mNumVertices = static_cast<unsigned int>( numValidPoints );

    int i = 0;
    for (XYZ &p : points) {
        pMesh->mVertices[i] = aiVector3D(p.x, p.y, p.z);
        ++i;
    }

    Assimp::Exporter mAiExporter;
    ExportProperties *properties = new ExportProperties;
    properties->SetPropertyBool(AI_CONFIG_EXPORT_POINT_CLOUDS, true);
    mAiExporter.Export(&scene, "stl", "testExport.stl", 0, properties );

    delete properties;
}

#endif