C++ LLBBox::IntersectOut方法代码示例

/* assembles lists of line strips from the given track recursively traversing
   the subtracks data */
void Track::Assemble(std::list< std::list<wxPoint> > &pointlists, const LLBBox &box, double scale, int &last, int level, int pos)
{
    if(pos == (int)SubTracks[level].size())
        return;

    SubTrack &s = SubTracks[level][pos];
    if(box.IntersectOut(s.m_box))
        return;

    if(s.m_scale < scale) {
        pos <<= level;

        if(last < pos - 1) {
            std::list<wxPoint> new_list;
            pointlists.push_back(new_list);
        }

        if(last < pos)
            AddPointToList(pointlists, pos);
        last = wxMin(pos + (1<<level), TrackPoints.size() - 1);
        AddPointToList(pointlists, last);
    } else {
        Assemble(pointlists, box, scale, last, level-1, pos<<1);
        Assemble(pointlists, box, scale, last, level-1, (pos<<1)+1);
    }
}

// internal test to see if regions don't intersect (optimization)
bool LLRegion::NoIntersection(const LLRegion& region) const
{
    if(Empty() || region.Empty())
        return true;
    
    LLBBox box = GetBox(), rbox = region.GetBox();
    return box.IntersectOut(rbox) || NoIntersection(rbox) || region.NoIntersection(box);
}

void RoutePoint::DrawGL( ViewPort &vp, bool use_cached_screen_coords )
{
    if( !m_bIsVisible )
        return;

    //    Optimization, especially apparent on tracks in normal cases
    if( m_IconName == _T("empty") && !m_bShowName && !m_bPtIsSelected ) return;

    if(m_wpBBox.GetValid() &&
       vp.view_scale_ppm == m_wpBBox_view_scale_ppm &&
       vp.rotation == m_wpBBox_rotation) {
        /* see if this waypoint can intersect with bounding box */
        LLBBox vpBBox = vp.GetBBox();
        if( vpBBox.IntersectOut( m_wpBBox ) ){
            
            // Are Range Rings enabled?
            if(m_bShowWaypointRangeRings && (m_iWaypointRangeRingsNumber > 0)){
                double factor = 1.00;
                if( m_iWaypointRangeRingsStepUnits == 1 )          // convert kilometers to NMi
                    factor = 1 / 1.852;
            
                double radius = factor * m_iWaypointRangeRingsNumber * m_fWaypointRangeRingsStep  / 60.;

                LLBBox radar_box = m_wpBBox;
                radar_box.EnLarge(radius * 2 );
                if( vpBBox.IntersectOut( radar_box ) ){
                    return;
                }
            }
            else
                return;
        }
    }

    wxPoint r;
    wxRect hilitebox;
    unsigned char transparency = 150;
    double platform_pen_width = wxRound(wxMax(1.0, g_Platform->GetDisplayDPmm() / 2));             // 0.5 mm nominal, but not less than 1 pixel
    
    if(use_cached_screen_coords && m_pos_on_screen)
        r.x = m_screen_pos.m_x, r.y = m_screen_pos.m_y;
    else
        cc1->GetCanvasPointPix( m_lat, m_lon, &r );

    if(r.x == INVALID_COORD)
        return;

//    Substitute icon?
    wxBitmap *pbm;
    if( ( m_bIsActive ) && ( m_IconName != _T("mob") ) )
        pbm = pWayPointMan->GetIconBitmap(  _T ( "activepoint" ) );
    else
        pbm = m_pbmIcon;

    //  If icon is corrupt, there is really nothing else to do...
    if(!pbm->IsOk())
        return;
    
    int sx2 = pbm->GetWidth() / 2;
    int sy2 = pbm->GetHeight() / 2;

//    Calculate the mark drawing extents
    wxRect r1( r.x - sx2, r.y - sy2, sx2 * 2, sy2 * 2 );           // the bitmap extents

    wxRect r3 = r1;
    if( m_bShowName ) {
        if( !m_pMarkFont ) {
            m_pMarkFont = FontMgr::Get().GetFont( _( "Marks" ) );
            m_FontColor = FontMgr::Get().GetFontColor( _( "Marks" ) );
            CalculateNameExtents();
        }

        if( m_pMarkFont ) {
            wxRect r2( r.x + m_NameLocationOffsetX, r.y + m_NameLocationOffsetY,
                       m_NameExtents.x, m_NameExtents.y );
            r3.Union( r2 );
        }
    }

    hilitebox = r3;
    hilitebox.x -= r.x;
    hilitebox.y -= r.y;
    
    hilitebox.x *= g_ChartScaleFactorExp;
    hilitebox.y *= g_ChartScaleFactorExp;
    hilitebox.width  *= g_ChartScaleFactorExp;
    hilitebox.height *= g_ChartScaleFactorExp;
    
    float radius;
    if( g_btouch ){
        hilitebox.Inflate( 20 );
        radius = 20.0f;
    }
    else{
        hilitebox.Inflate( 4 );
        radius = 4.0f;
    }
    
    /* update bounding box */
    if(!m_wpBBox.GetValid() || vp.view_scale_ppm != m_wpBBox_view_scale_ppm || vp.rotation != m_wpBBox_rotation) {
//.........这里部分代码省略.........

void Route::Draw( ocpnDC& dc, ViewPort &vp, const LLBBox &box )
{
    if( pRoutePointList->empty() )
        return;

    LLBBox test_box = GetBBox();
    if( box.IntersectOut( test_box ) ) // Route is wholly outside window
        return;

    int width = g_route_line_width;
    if( m_width != WIDTH_UNDEFINED ) width = m_width;

    if( m_bVisible && m_bRtIsSelected ) {
        wxPen spen = *g_pRouteMan->GetSelectedRoutePen();
        spen.SetWidth( width );
        dc.SetPen( spen );
        dc.SetBrush( *g_pRouteMan->GetSelectedRouteBrush() );
    }
    else if ( m_bVisible )
    {
        wxPenStyle style = wxPENSTYLE_SOLID;
        wxColour col;
        if( m_style != wxPENSTYLE_INVALID ) style = m_style;
        if( m_Colour == wxEmptyString ) {
            col = g_pRouteMan->GetRoutePen()->GetColour();
        } else {
            for( unsigned int i = 0; i < sizeof( ::GpxxColorNames ) / sizeof(wxString); i++ ) {
                if( m_Colour == ::GpxxColorNames[i] ) {
                    col = ::GpxxColors[i];
                    break;
                }
            }
        }
        dc.SetPen( *wxThePenList->FindOrCreatePen( col, width, style ) );
        dc.SetBrush( *wxTheBrushList->FindOrCreateBrush( col, wxBRUSHSTYLE_SOLID ) );
    }

    if( m_bVisible && m_bRtIsActive )
    {
        wxPen spen = *g_pRouteMan->GetActiveRoutePen();
        spen.SetWidth( width );
        dc.SetPen( spen );
        dc.SetBrush( *g_pRouteMan->GetActiveRouteBrush() );
    }

    wxPoint rpt1, rpt2;
    if ( m_bVisible )
        DrawPointWhich( dc, 1, &rpt1 );

    wxRoutePointListNode *node = pRoutePointList->GetFirst();
    RoutePoint *prp1 = node->GetData();
    node = node->GetNext();

    if ( !m_bVisible && prp1->m_bKeepXRoute )
        prp1->Draw( dc );

    while( node ) {

        RoutePoint *prp2 = node->GetData();
        if ( !m_bVisible && prp2->m_bKeepXRoute )
            prp2->Draw( dc );
        else if (m_bVisible)
            prp2->Draw( dc, &rpt2 );

        if ( m_bVisible )
        {
            //    Handle offscreen points
            bool b_2_on = vp.GetBBox().Contains( prp2->m_lat,  prp2->m_lon );
            bool b_1_on = vp.GetBBox().Contains( prp1->m_lat,  prp1->m_lon );

            //Simple case
            if( b_1_on && b_2_on ) RenderSegment( dc, rpt1.x, rpt1.y, rpt2.x, rpt2.y, vp, true, m_hiliteWidth ); // with arrows

            //    In the cases where one point is on, and one off
            //    we must decide which way to go in longitude
            //     Arbitrarily, we will go the shortest way

            double pix_full_circle = WGS84_semimajor_axis_meters * mercator_k0 * 2 * PI
                                     * vp.view_scale_ppm;
            double dp = pow( (double) ( rpt1.x - rpt2.x ), 2 ) + pow( (double) ( rpt1.y - rpt2.y ), 2 );
            double dtest;
            int adder;
            if( b_1_on && !b_2_on ) {
                if( rpt2.x < rpt1.x ) adder = (int) pix_full_circle;
                else
                    adder = -(int) pix_full_circle;

                dtest = pow( (double) ( rpt1.x - ( rpt2.x + adder ) ), 2 )
                        + pow( (double) ( rpt1.y - rpt2.y ), 2 );

                if( dp < dtest ) adder = 0;

                RenderSegment( dc, rpt1.x, rpt1.y, rpt2.x + adder, rpt2.y, vp, true, m_hiliteWidth );
            } else if( !b_1_on ) {
                if( rpt1.x < rpt2.x ) adder = (int) pix_full_circle;
                else
                    adder = -(int) pix_full_circle;

                float rxd = rpt2.x - ( rpt1.x + adder );
                float ryd = rpt1.y - rpt2.y;
//.........这里部分代码省略.........