C++ MeshData3D::normals方法代码示例

PrimitivesExample::PrimitivesExample(const Arguments& arguments):
    Platform::Application{arguments, Configuration{}.setTitle("Magnum Primitives Example")}
{
    GL::Renderer::enable(GL::Renderer::Feature::DepthTest);
    GL::Renderer::enable(GL::Renderer::Feature::FaceCulling);

    const Trade::MeshData3D cube = Primitives::cubeSolid();

    _vertexBuffer.setData(MeshTools::interleave(cube.positions(0), cube.normals(0)));

    Containers::Array<char> indexData;
    MeshIndexType indexType;
    UnsignedInt indexStart, indexEnd;
    std::tie(indexData, indexType, indexStart, indexEnd) =
        MeshTools::compressIndices(cube.indices());
    _indexBuffer.setData(indexData);

    _mesh.setPrimitive(cube.primitive())
        .setCount(cube.indices().size())
        .addVertexBuffer(_vertexBuffer, 0, Shaders::Phong::Position{},
                                           Shaders::Phong::Normal{})
        .setIndexBuffer(_indexBuffer, 0, indexType, indexStart, indexEnd);

    _transformation =
        Matrix4::rotationX(30.0_degf)*Matrix4::rotationY(40.0_degf);
    _projection =
        Matrix4::perspectiveProjection(
            35.0_degf, Vector2{windowSize()}.aspectRatio(), 0.01f, 100.0f)*
        Matrix4::translation(Vector3::zAxis(-10.0f));
    _color = Color3::fromHsv({35.0_degf, 1.0f, 1.0f});
}

void UVSphereTest::withoutTextureCoords() {
    Trade::MeshData3D sphere = UVSphere::solid(3, 3);

    CORRADE_COMPARE_AS(*sphere.positions(0), (std::vector<Vector3>{
        {0.0f, -1.0f, 0.0f},

        {0.0f, -0.5f, 0.866025f},
        {0.75f, -0.5f, -0.433013f},
        {-0.75f, -0.5f, -0.433013f},

        {0, 0.5f, 0.866025f},
        {0.75f, 0.5f, -0.433013f},
        {-0.75f, 0.5f, -0.433013f},

        {0.0f, 1.0f, 0.0f}
    }), TestSuite::Compare::Container);

    CORRADE_COMPARE_AS(*sphere.normals(0), (std::vector<Vector3>{
        {0.0f, -1.0f, 0.0f},

        {0.0f, -0.5f, 0.866025f},
        {0.75f, -0.5f, -0.433013f},
        {-0.75f, -0.5f, -0.433013f},

        {0, 0.5f, 0.866025f},
        {0.75f, 0.5f, -0.433013f},
        {-0.75f, 0.5f, -0.433013f},

        {0.0f, 1.0f, 0.0f}
    }), TestSuite::Compare::Container);

    CORRADE_COMPARE_AS(*sphere.indices(), (std::vector<UnsignedInt>{
        0, 2, 1, 0, 3, 2, 0, 1, 3,
        1, 2, 5, 1, 5, 4, 2, 3, 6, 2, 6, 5, 3, 1, 4, 3, 4, 6,
        4, 5, 7, 5, 6, 7, 6, 4, 7
    }), TestSuite::Compare::Container);
}

void CylinderTest::withoutAnything() {
    Trade::MeshData3D cylinder = Cylinder::solid(2, 3, 3.0f);

    CORRADE_COMPARE_AS(*cylinder.positions(0), (std::vector<Vector3>{
        {0.0f, -1.5f, 1.0f},
        {0.866025f, -1.5f, -0.5f},
        {-0.866025f, -1.5f, -0.5f},

        {0.0f, 0.0f, 1.0f},
        {0.866025f, 0.0f, -0.5f},
        {-0.866025f, 0.0f, -0.5f},

        {0.0f, 1.5f, 1.0f},
        {0.866025f, 1.5f, -0.5f},
        {-0.866025f, 1.5f, -0.5f}
    }), Container);

    CORRADE_COMPARE_AS(*cylinder.normals(0), (std::vector<Vector3>{
        {0.0f, 0.0f, 1.0f},
        {0.866025f, 0.0f, -0.5f},
        {-0.866025f, 0.0f, -0.5f},

        {0.0f, 0.0f, 1.0f},
        {0.866025f, 0.0f, -0.5f},
        {-0.866025f, 0.0f, -0.5f},

        {0.0f, 0.0f, 1.0f},
        {0.866025f, 0.0f, -0.5f},
        {-0.866025f, 0.0f, -0.5f}
    }), Container);

    CORRADE_COMPARE_AS(*cylinder.indices(), (std::vector<UnsignedInt>{
        0, 1, 4, 0, 4, 3, 1, 2, 5, 1, 5, 4, 2, 0, 3, 2, 3, 5,
        3, 4, 7, 3, 7, 6, 4, 5, 8, 4, 8, 7, 5, 3, 6, 5, 6, 8
    }), Container);
}

void CylinderTest::withTextureCoordsAndCaps() {
    Trade::MeshData3D cylinder = Cylinder::solid(2, 3, 3.0f, Cylinder::Flag::GenerateTextureCoords|Cylinder::Flag::CapEnds);

    CORRADE_COMPARE_AS(*cylinder.positions(0), (std::vector<Vector3>{
        {0.0f, -1.5f, 0.0f},

        {0.0f, -1.5f, 1.0f},
        {0.866025f, -1.5f, -0.5f},
        {-0.866025f, -1.5f, -0.5f},
        {0.0f, -1.5f, 1.0f},

        {0.0f, -1.5f, 1.0f},
        {0.866025f, -1.5f, -0.5f},
        {-0.866025f, -1.5f, -0.5f},
        {0.0f, -1.5f, 1.0f},

        {0.0f, 0.0f, 1.0f},
        {0.866025f, 0.0f, -0.5f},
        {-0.866025f, 0.0f, -0.5f},
        {0.0f, 0.0f, 1.0f},

        {0.0f, 1.5f, 1.0f},
        {0.866025f, 1.5f, -0.5f},
        {-0.866025f, 1.5f, -0.5f},
        {0.0f, 1.5f, 1.0f},

        {0.0f, 1.5f, 1.0f},
        {0.866025f, 1.5f, -0.5f},
        {-0.866025f, 1.5f, -0.5f},
        {0.0f, 1.5f, 1.0f},

        {0.0f, 1.5f, 0.0f}
    }), Container);

    CORRADE_COMPARE_AS(*cylinder.normals(0), (std::vector<Vector3>{
        {0.0f, -1.0f, 0.0f},

        {0.0f, -1.0f, 0.0f},
        {0.0f, -1.0f, 0.0f},
        {0.0f, -1.0f, 0.0f},
        {0.0f, -1.0f, 0.0f},

        {0.0f, 0.0f, 1.0f},
        {0.866025f, 0.0f, -0.5f},
        {-0.866025f, 0.0f, -0.5f},
        {0.0f, 0.0f, 1.0f},

        {0.0f, 0.0f, 1.0f},
        {0.866025f, 0.0f, -0.5f},
        {-0.866025f, 0.0f, -0.5f},
        {0.0f, 0.0f, 1.0f},

        {0.0f, 0.0f, 1.0f},
        {0.866025f, 0.0f, -0.5f},
        {-0.866025f, 0.0f, -0.5f},
        {0.0f, 0.0f, 1.0f},

        {0.0f, 1.0f, 0.0f},
        {0.0f, 1.0f, 0.0f},
        {0.0f, 1.0f, 0.0f},
        {0.0f, 1.0f, 0.0f},

        {0.0f, 1.0f, 0.0f},
    }), Container);

    CORRADE_COMPARE_AS(*cylinder.textureCoords2D(0), (std::vector<Vector2>{
        {0.5f, 0.0f},

        {0.0f, 0.2f},
        {0.333333f, 0.2f},
        {0.666667f, 0.2f},
        {1.0f, 0.2f},

        {0.0f, 0.2f},
        {0.333333f, 0.2f},
        {0.666667f, 0.2f},
        {1.0f, 0.2f},

        {0.0f, 0.5f},
        {0.333333f, 0.5f},
        {0.666667f, 0.5f},
        {1.0f, 0.5f},

        {0.0f, 0.8f},
        {0.333333f, 0.8f},
        {0.666667f, 0.8f},
        {1.0f, 0.8f},

        {0.0f, 0.8f},
        {0.333333f, 0.8f},
        {0.666667f, 0.8f},
        {1.0f, 0.8f},

        {0.5f, 1.0f}
    }), Container);

    CORRADE_COMPARE_AS(*cylinder.indices(), (std::vector<UnsignedInt>{
        0, 2, 1, 0, 3, 2, 0, 4, 3,
        1, 2, 6, 1, 6, 5, 2, 3, 7, 2, 7, 6, 3, 4, 8, 3, 8, 7,
        5, 6, 10, 5, 10, 9, 6, 7, 11, 6, 11, 10, 7, 8, 12, 7,
//.........这里部分代码省略.........

MotionBlurExample::MotionBlurExample(const Arguments& arguments): Platform::Application(arguments, Configuration().setTitle("Magnum Motion Blur Example")) {
    (cameraObject = new Object3D(&scene))
        ->translate(Vector3::zAxis(3.0f));
    (camera = new MotionBlurCamera(*cameraObject))
        ->setAspectRatioPolicy(SceneGraph::AspectRatioPolicy::Extend)
        .setProjectionMatrix(Matrix4::perspectiveProjection(Deg(35.0f), 1.0f, 0.001f, 100))
        .setViewport(GL::defaultFramebuffer.viewport().size());
    GL::Renderer::setClearColor({0.1f, 0.1f, 0.1f});
    GL::Renderer::enable(GL::Renderer::Feature::DepthTest);
    GL::Renderer::enable(GL::Renderer::Feature::FaceCulling);

    const Trade::MeshData3D data = Primitives::icosphereSolid(3);

    buffer.setData(MeshTools::interleave(data.positions(0), data.normals(0)), GL::BufferUsage::StaticDraw);

    Containers::Array<char> indexData;
    MeshIndexType indexType;
    UnsignedInt indexStart, indexEnd;
    std::tie(indexData, indexType, indexStart, indexEnd) = MeshTools::compressIndices(data.indices());
    indexBuffer.setData(indexData, GL::BufferUsage::StaticDraw);

    mesh.setPrimitive(data.primitive())
        .setCount(data.indices().size())
        .addVertexBuffer(buffer, 0, Shaders::Phong::Position{}, Shaders::Phong::Normal{})
        .setIndexBuffer(indexBuffer, 0, indexType, indexStart, indexEnd);

    /* Add spheres to the scene */
    new Icosphere(&mesh, &shader, {1.0f, 1.0f, 0.0f}, &scene, &drawables);

    spheres[0] = new Object3D(&scene);
    (new Icosphere(&mesh, &shader, {1.0f, 0.0f, 0.0f}, spheres[0], &drawables))
        ->translate(Vector3::yAxis(0.25f));
    (new Icosphere(&mesh, &shader, {1.0f, 0.0f, 0.0f}, spheres[0], &drawables))
        ->translate(Vector3::yAxis(0.25f))
        .rotateZ(Deg(120.0f));
    (new Icosphere(&mesh, &shader, {1.0f, 0.0f, 0.0f}, spheres[0], &drawables))
        ->translate(Vector3::yAxis(0.25f))
        .rotateZ(Deg(240.0f));

    spheres[1] = new Object3D(&scene);
    (new Icosphere(&mesh, &shader, {0.0f, 1.0f, 0.0f}, spheres[1], &drawables))
        ->translate(Vector3::yAxis(0.50f));
    (new Icosphere(&mesh, &shader, {0.0f, 1.0f, 0.0f}, spheres[1], &drawables))
        ->translate(Vector3::yAxis(0.50f))
        .rotateZ(Deg(120.0f));
    (new Icosphere(&mesh, &shader, {0.0f, 1.0f, 0.0f}, spheres[1], &drawables))
        ->translate(Vector3::yAxis(0.50f))
        .rotateZ(Deg(240.0f));

    spheres[2] = new Object3D(&scene);
    (new Icosphere(&mesh, &shader, {0.0f, 0.0f, 1.0f}, spheres[2], &drawables))
        ->translate(Vector3::yAxis(0.75f));
    (new Icosphere(&mesh, &shader, {0.0f, 0.0f, 1.0f}, spheres[2], &drawables))
        ->translate(Vector3::yAxis(0.75f))
        .rotateZ(Deg(120.0f));
    (new Icosphere(&mesh, &shader, {0.0f, 0.0f, 1.0f}, spheres[2], &drawables))
        ->translate(Vector3::yAxis(0.75f))
        .rotateZ(Deg(240.0f));

    setSwapInterval(16);
    setMinimalLoopPeriod(40);
}

void CapsuleTest::solid3DWithoutTextureCoords() {
    Trade::MeshData3D capsule = Capsule3D::solid(2, 4, 3, 0.5f);

    CORRADE_COMPARE_AS(capsule.positions(0), (std::vector<Vector3>{
        {0.0f, -1.5f, 0.0f},

        {0.0f, -1.20711f, 0.707107f},
        {0.612372f, -1.20711f, -0.353553f},
        {-0.612373f, -1.20711f, -0.353553f},

        {0.0f, -0.5f, 1.0f},
        {0.866025f, -0.5f, -0.5f},
        {-0.866025f, -0.5f, -0.5f},

        {0.0f, -0.25f, 1.0f},
        {0.866025f, -0.25f, -0.5f},
        {-0.866025f, -0.25f, -0.5f},

        {0.0f, 0.0f, 1.0f},
        {0.866025f, 0.0f, -0.5f},
        {-0.866025f, 0.0f, -0.5f},

        {0.0f, 0.25f, 1.0f},
        {0.866025f, 0.25f, -0.5f},
        {-0.866025f, 0.25f, -0.5f},

        {0.0f, 0.5f, 1.0f},
        {0.866025f, 0.5f, -0.5f},
        {-0.866025f, 0.5f, -0.5f},

        {0.0f, 1.20711f, 0.707107f},
        {0.612372f, 1.20711f, -0.353553f},
        {-0.612372f, 1.20711f, -0.353553f},

        {0.0f, 1.5f, 0.0f}
    }), TestSuite::Compare::Container);

    CORRADE_COMPARE_AS(capsule.normals(0), (std::vector<Vector3>{
        {0.0f, -1.0f, 0.0f},

        {0.0f, -0.707107f, 0.707107f},
        {0.612372f, -0.707107f, -0.353553f},
        {-0.612373f, -0.707107f, -0.353553f},

        {0.0f, 0.0f, 1.0f},
        {0.866025f, 0.0f, -0.5f},
        {-0.866025f, 0.0f, -0.5f},

        {0.0f, 0.0f, 1.0f},
        {0.866025f, 0.0f, -0.5f},
        {-0.866025f, 0.0f, -0.5f},

        {0.0f, 0.0f, 1.0f},
        {0.866025f, 0.0f, -0.5f},
        {-0.866025f, 0.0f, -0.5f},

        {0.0f, 0.0f, 1.0f},
        {0.866025f, 0.0f, -0.5f},
        {-0.866025f, 0.0f, -0.5f},

        {0.0f, 0.0f, 1.0f},
        {0.866025f, 0.0f, -0.5f},
        {-0.866025f, 0.0f, -0.5f},

        {0.0f, 0.707107f, 0.707107f},
        {0.612372f, 0.707107f, -0.353553f},
        {-0.612372f, 0.707107f, -0.353553f},

        {0.0f, 1.0f, 0.0f}
    }), TestSuite::Compare::Container);

    CORRADE_COMPARE_AS(capsule.indices(), (std::vector<UnsignedInt>{
        0, 2, 1, 0, 3, 2, 0, 1, 3,
        1, 2, 5, 1, 5, 4, 2, 3, 6, 2, 6, 5, 3, 1, 4, 3, 4, 6,
        4, 5, 8, 4, 8, 7, 5, 6, 9, 5, 9, 8, 6, 4, 7, 6, 7, 9,
        7, 8, 11, 7, 11, 10, 8, 9, 12, 8, 12, 11, 9, 7, 10, 9, 10, 12,
        10, 11, 14, 10, 14, 13, 11, 12, 15, 11, 15, 14, 12, 10, 13, 12, 13, 15,
        13, 14, 17, 13, 17, 16, 14, 15, 18, 14, 18, 17, 15, 13, 16, 15, 16, 18,
        16, 17, 20, 16, 20, 19, 17, 18, 21, 17, 21, 20, 18, 16, 19, 18, 19, 21,
        19, 20, 22, 20, 21, 22, 21, 19, 22
    }), TestSuite::Compare::Container);
}

std::tuple<Mesh, std::unique_ptr<Buffer>, std::unique_ptr<Buffer>> compile(const Trade::MeshData3D& meshData, const BufferUsage usage) {
    Mesh mesh;
    mesh.setPrimitive(meshData.primitive());

    /* Decide about stride and offsets */
    UnsignedInt stride = sizeof(Shaders::Generic3D::Position::Type);
    const UnsignedInt normalOffset = sizeof(Shaders::Generic3D::Position::Type);
    UnsignedInt textureCoordsOffset = sizeof(Shaders::Generic3D::Position::Type);
    if(meshData.hasNormals()) {
        stride += sizeof(Shaders::Generic3D::Normal::Type);
        textureCoordsOffset += sizeof(Shaders::Generic3D::Normal::Type);
    }
    if(meshData.hasTextureCoords2D())
        stride += sizeof(Shaders::Generic3D::TextureCoordinates::Type);

    /* Create vertex buffer */
    std::unique_ptr<Buffer> vertexBuffer{new Buffer{Buffer::TargetHint::Array}};

    /* Interleave positions */
    Containers::Array<char> data = MeshTools::interleave(
        meshData.positions(0),
        stride - sizeof(Shaders::Generic3D::Position::Type));
    mesh.addVertexBuffer(*vertexBuffer, 0,
        Shaders::Generic3D::Position(),
        stride - sizeof(Shaders::Generic3D::Position::Type));

    /* Add also normals, if present */
    if(meshData.hasNormals()) {
        MeshTools::interleaveInto(data,
            normalOffset,
            meshData.normals(0),
            stride - normalOffset - sizeof(Shaders::Generic3D::Normal::Type));
        mesh.addVertexBuffer(*vertexBuffer, 0,
            normalOffset,
            Shaders::Generic3D::Normal(),
            stride - normalOffset - sizeof(Shaders::Generic3D::Normal::Type));
    }

    /* Add also texture coordinates, if present */
    if(meshData.hasTextureCoords2D()) {
        MeshTools::interleaveInto(data,
            textureCoordsOffset,
            meshData.textureCoords2D(0),
            stride - textureCoordsOffset - sizeof(Shaders::Generic3D::TextureCoordinates::Type));
        mesh.addVertexBuffer(*vertexBuffer, 0,
            textureCoordsOffset,
            Shaders::Generic3D::TextureCoordinates(),
            stride - textureCoordsOffset - sizeof(Shaders::Generic3D::TextureCoordinates::Type));
    }

    /* Fill vertex buffer with interleaved data */
    vertexBuffer->setData(data, usage);

    /* If indexed, fill index buffer and configure indexed mesh */
    std::unique_ptr<Buffer> indexBuffer;
    if(meshData.isIndexed()) {
        Containers::Array<char> indexData;
        Mesh::IndexType indexType;
        UnsignedInt indexStart, indexEnd;
        std::tie(indexData, indexType, indexStart, indexEnd) = MeshTools::compressIndices(meshData.indices());

        indexBuffer.reset(new Buffer{Buffer::TargetHint::ElementArray});
        indexBuffer->setData(indexData, usage);
        mesh.setCount(meshData.indices().size())
            .setIndexBuffer(*indexBuffer, 0, indexType, indexStart, indexEnd);

    /* Else set vertex count */
    } else mesh.setCount(meshData.positions(0).size());

    return std::make_tuple(std::move(mesh), std::move(vertexBuffer), std::move(indexBuffer));
}