C++ PNS_LINE::SegmentCount方法代码示例

void PNS_LINE_PLACER::removeLoops( PNS_NODE* aNode, PNS_LINE& aLatest )
{
    if( !aLatest.SegmentCount() )
        return;

    if( aLatest.CLine().CPoint( 0 ) == aLatest.CLine().CPoint( -1 ) )
        return;

    std::set<PNS_SEGMENT *> toErase;
    aNode->Add( &aLatest, true );

    for( int s = 0; s < aLatest.LinkCount(); s++ )
    {
        PNS_SEGMENT* seg = ( *aLatest.LinkedSegments() )[s];
        PNS_LINE ourLine = aNode->AssembleLine( seg );
        PNS_JOINT a, b;
        std::vector<PNS_LINE> lines;

        aNode->FindLineEnds( ourLine, a, b );

        if( a == b )
        {
            aNode->FindLineEnds( aLatest, a, b );
        }

        aNode->FindLinesBetweenJoints( a, b, lines );

        int removedCount = 0;
        int total = 0;

        for( PNS_LINE& line : lines )
        {
            total++;

            if( !( line.ContainsSegment( seg ) ) && line.SegmentCount() )
            {
                for( PNS_SEGMENT *ss : *line.LinkedSegments() )
                    toErase.insert( ss );

                removedCount++;
            }
        }

        TRACE( 0, "total segs removed: %d/%d\n", removedCount % total );
    }

    for( PNS_SEGMENT *s : toErase )
        aNode->Remove( s );

    aNode->Remove( &aLatest );
}

bool PNS_LINE_PLACER::Move( const VECTOR2I& aP, PNS_ITEM* aEndItem )
{
    PNS_LINE current;
    VECTOR2I p = aP;
    int eiDepth = -1;

    if( aEndItem && aEndItem->Owner() )
        eiDepth = aEndItem->Owner()->Depth();

    if( m_lastNode )
    {
        delete m_lastNode;
        m_lastNode = NULL;
    }

    route( p );

    current = Trace();

    if( !current.PointCount() )
        m_currentEnd = m_p_start;
    else
        m_currentEnd = current.CLine().CPoint( -1 );

    PNS_NODE* latestNode = m_currentNode;
    m_lastNode = latestNode->Branch();

    if( eiDepth >= 0 && aEndItem && latestNode->Depth() > eiDepth &&
            current.SegmentCount() )
    {
        splitAdjacentSegments( m_lastNode, aEndItem, current.CPoint( -1 ) );

        if( Settings().RemoveLoops() )
            removeLoops( m_lastNode, &current );
    }

    updateLeadingRatLine();
    return true;
}

bool PNS_LINE_PLACER::optimizeTailHeadTransition()
{
    PNS_LINE tmp = Trace();

    if( PNS_OPTIMIZER::Optimize( &tmp, PNS_OPTIMIZER::FANOUT_CLEANUP, m_currentNode ) )
    {
        if( tmp.SegmentCount() < 1 )
            return false;

        m_head = tmp;
        m_p_start = tmp.CLine().CPoint( 0 );
        m_direction = DIRECTION_45( tmp.CSegment( 0 ) );
        m_tail.Line().Clear();

        return true;
    }

    SHAPE_LINE_CHAIN& head = m_head.Line();
    SHAPE_LINE_CHAIN& tail = m_tail.Line();

    int tailLookbackSegments = 3;

    //if(m_currentMode() == RM_Walkaround)
    //    tailLookbackSegments = 10000;

    int threshold = std::min( tail.PointCount(), tailLookbackSegments + 1 );

    if( tail.SegmentCount() < 3 )
        return false;

    // assemble TailLookbackSegments tail segments with the current head
    SHAPE_LINE_CHAIN opt_line = tail.Slice( -threshold, -1 );

    int end = std::min(2, head.PointCount() - 1 );

    opt_line.Append( head.Slice( 0, end ) );

    PNS_LINE new_head( m_tail, opt_line );

    // and see if it could be made simpler by merging obtuse/collnear segments.
    // If so, replace the (threshold) last tail points and the head with
    // the optimized line

    if( PNS_OPTIMIZER::Optimize( &new_head, PNS_OPTIMIZER::MERGE_OBTUSE, m_currentNode ) )
    {
        PNS_LINE tmp( m_tail, opt_line );

        TRACE( 0, "Placer: optimize tail-head [%d]", threshold );

        head.Clear();
        tail.Replace( -threshold, -1, new_head.CLine() );
        tail.Simplify();

        m_p_start = new_head.CLine().CPoint( -1 );
        m_direction = DIRECTION_45( new_head.CSegment( -1 ) );

        return true;
    }

    return false;
}

PNS_WALKAROUND::WALKAROUND_STATUS PNS_WALKAROUND::Route( const PNS_LINE& aInitialPath,
        PNS_LINE& aWalkPath, bool aOptimize )
{
    PNS_LINE path_cw( aInitialPath ), path_ccw( aInitialPath );
    WALKAROUND_STATUS s_cw = IN_PROGRESS, s_ccw = IN_PROGRESS;
    SHAPE_LINE_CHAIN best_path;

    start( aInitialPath );

    m_currentObstacle[0] = m_currentObstacle[1] = nearestObstacle( aInitialPath );
    m_recursiveBlockageCount = 0;

    aWalkPath = aInitialPath;

    if( m_forceWinding )
    {
        s_cw = m_forceCw ? IN_PROGRESS : STUCK;
        s_ccw = m_forceCw ? STUCK : IN_PROGRESS;
        m_forceSingleDirection = true;
    } else {
        m_forceSingleDirection = false;
    }

    while( m_iteration < m_iterationLimit )
    {
        if( s_cw != STUCK )
            s_cw = singleStep( path_cw, true );

        if( s_ccw != STUCK )
            s_ccw = singleStep( path_ccw, false );

        if( ( s_cw == DONE && s_ccw == DONE ) || ( s_cw == STUCK && s_ccw == STUCK ) )
        {
            int len_cw  = path_cw.CLine().Length();
            int len_ccw = path_ccw.CLine().Length();

            if( m_forceLongerPath )
                aWalkPath = ( len_cw > len_ccw ? path_cw : path_ccw );
            else
                aWalkPath = ( len_cw < len_ccw ? path_cw : path_ccw );

            break;
        }
        else if( s_cw == DONE && !m_forceLongerPath )
        {
            aWalkPath = path_cw;
            break;
        }
        else if( s_ccw == DONE && !m_forceLongerPath )
        {
            aWalkPath = path_ccw;
            break;
        }

        m_iteration++;
    }

    if( m_iteration == m_iterationLimit )
    {
        int len_cw  = path_cw.CLine().Length();
        int len_ccw = path_ccw.CLine().Length();

        if( m_forceLongerPath )
            aWalkPath = ( len_cw > len_ccw ? path_cw : path_ccw );
        else
            aWalkPath = ( len_cw < len_ccw ? path_cw : path_ccw );
    }

    if( m_cursorApproachMode )
    {
        // int len_cw = path_cw.GetCLine().Length();
        // int len_ccw = path_ccw.GetCLine().Length();
        bool found = false;

        SHAPE_LINE_CHAIN l = aWalkPath.CLine();

        for( int i = 0; i < l.SegmentCount(); i++ )
        {
            const SEG s = l.Segment( i );

            VECTOR2I nearest = s.NearestPoint( m_cursorPos );
            VECTOR2I::extended_type dist_a = ( s.A - m_cursorPos ).SquaredEuclideanNorm();
            VECTOR2I::extended_type dist_b = ( s.B - m_cursorPos ).SquaredEuclideanNorm();
            VECTOR2I::extended_type dist_n = ( nearest - m_cursorPos ).SquaredEuclideanNorm();

            if( dist_n <= dist_a && dist_n < dist_b )
            {
                l.Remove( i + 1, -1 );
                l.Append( nearest );
                l.Simplify();
                found = true;
                break;
            }
        }

        if( found )
        {
            aWalkPath = aInitialPath;
            aWalkPath.SetShape( l );
        }
//.........这里部分代码省略.........