Method initBasisAxesObject_

source/MRViewer/MRViewer.cpp:2107–2180

}

void Viewer::initBasisAxesObject_()
{
    // store basis axes in the corner
    const float cubeSzie = 0.8f;
    const float size = 1.0f;
    std::shared_ptr<Mesh> basisAxesMesh = std::make_shared<Mesh>( makeBasisAxes( size, size * 0.03f, size * 0.03f, 0.0f ) );
    const Vector3f translation = Vector3f::diagonal( -cubeSzie * 0.5f );
    basisAxesMesh->transform( AffineXf3f::translation( translation ) );

    basisAxes = std::make_shared<ObjectMesh>();
    basisAxes->setMesh( basisAxesMesh );
    basisAxes->setName("Basis axes mesh");
    basisAxes->setFlatShading( true );

    auto numF = basisAxesMesh->topology.edgePerFace().size();
    // setting color to faces
    const Color colorX = ColorTheme::getViewportColor( ColorTheme::ViewportColorsType::AxisX );
    const Color colorY = ColorTheme::getViewportColor( ColorTheme::ViewportColorsType::AxisY );
    const Color colorZ = ColorTheme::getViewportColor( ColorTheme::ViewportColorsType::AxisZ );
    FaceColors colorMap( numF );
    const auto arrowSize = numF / 3;
    for (int i = 0; i < arrowSize; i++)
    {
        colorMap[FaceId( i )] = colorX;
        colorMap[FaceId( i + arrowSize )] = colorY;
        colorMap[FaceId( i + arrowSize * 2 )] = colorZ;
    }
    const float labelPos = size + 0.2f;

    addLabel( *basisAxes, "X", labelPos * Vector3f::plusX() + translation, true );
    addLabel( *basisAxes, "Y", labelPos * Vector3f::plusY() + translation, true );
    addLabel( *basisAxes, "Z", labelPos * Vector3f::plusZ() + translation, true );

    basisAxes->setFacesColorMap( std::move( colorMap ) );
    basisAxes->setVisualizeProperty( false, MeshVisualizePropertyType::EnableShading, ViewportMask::all() );
    basisAxes->setColoringType( ColoringType::FacesColorMap );

    connections_->uiUpdateConnections.push_back( ColorTheme::instance().onChanged( [this, numF] ()
    {
        if ( !basisAxes )
            return;

        const Color colorX = ColorTheme::getViewportColor( ColorTheme::ViewportColorsType::AxisX );
        const Color colorY = ColorTheme::getViewportColor( ColorTheme::ViewportColorsType::AxisY );
        const Color colorZ = ColorTheme::getViewportColor( ColorTheme::ViewportColorsType::AxisZ );
        FaceColors colorMap;
        basisAxes->updateFacesColorMap( colorMap ); // swap with empty with real
        const auto arrowSize = numF / 3;
        for ( int i = 0; i < arrowSize; i++ ) // update real
        {
            colorMap[FaceId( i )] = colorX;
            colorMap[FaceId( i + arrowSize )] = colorY;
            colorMap[FaceId( i + arrowSize * 2 )] = colorZ;
        }
        basisAxes->updateFacesColorMap( colorMap ); // swap updated real with empty

        const Color& color = SceneColors::get( SceneColors::Type::Labels );