C++ TRACK::GetClearance方法代码示例

void ZONE_CONTAINER::buildFeatureHoleList( BOARD* aPcb, SHAPE_POLY_SET& aFeatures )
{
    int segsPerCircle;
    double correctionFactor;

    // Set the number of segments in arc approximations
    if( m_ArcToSegmentsCount == ARC_APPROX_SEGMENTS_COUNT_HIGHT_DEF  )
        segsPerCircle = ARC_APPROX_SEGMENTS_COUNT_HIGHT_DEF;
    else
        segsPerCircle = ARC_APPROX_SEGMENTS_COUNT_LOW_DEF;

    /* calculates the coeff to compensate radius reduction of holes clearance
     * due to the segment approx.
     * For a circle the min radius is radius * cos( 2PI / s_CircleToSegmentsCount / 2)
     * s_Correction is 1 /cos( PI/s_CircleToSegmentsCount  )
     */
    correctionFactor = 1.0 / cos( M_PI / (double) segsPerCircle );

    aFeatures.RemoveAllContours();

    int outline_half_thickness = m_ZoneMinThickness / 2;

    int zone_clearance = std::max( m_ZoneClearance, GetClearance() );
    zone_clearance += outline_half_thickness;

    /* store holes (i.e. tracks and pads areas as polygons outlines)
     * in a polygon list
     */

    /* items ouside the zone bounding box are skipped
     * the bounding box is the zone bounding box + the biggest clearance found in Netclass list
     */
    EDA_RECT item_boundingbox;
    EDA_RECT zone_boundingbox  = GetBoundingBox();
    int      biggest_clearance = aPcb->GetDesignSettings().GetBiggestClearanceValue();
    biggest_clearance = std::max( biggest_clearance, zone_clearance );
    zone_boundingbox.Inflate( biggest_clearance );

    /*
     * First : Add pads. Note: pads having the same net as zone are left in zone.
     * Thermal shapes will be created later if necessary
     */
    int item_clearance;

    /* Use a dummy pad to calculate hole clerance when a pad is not on all copper layers
     * and this pad has a hole
     * This dummy pad has the size and shape of the hole
    * Therefore, this dummy pad is a circle or an oval.
     * A pad must have a parent because some functions expect a non null parent
     * to find the parent board, and some other data
     */
    MODULE dummymodule( aPcb );    // Creates a dummy parent
    D_PAD dummypad( &dummymodule );

    for( MODULE* module = aPcb->m_Modules;  module;  module = module->Next() )
    {
        D_PAD* nextpad;

        for( D_PAD* pad = module->Pads(); pad != NULL; pad = nextpad )
        {
            nextpad = pad->Next();  // pad pointer can be modified by next code, so
                                    // calculate the next pad here

            if( !pad->IsOnLayer( GetLayer() ) )
            {
                /* Test for pads that are on top or bottom only and have a hole.
                 * There are curious pads but they can be used for some components that are
                 * inside the board (in fact inside the hole. Some photo diodes and Leds are
                 * like this)
                 */
                if( pad->GetDrillSize().x == 0 && pad->GetDrillSize().y == 0 )
                    continue;

                // Use a dummy pad to calculate a hole shape that have the same dimension as
                // the pad hole
                dummypad.SetSize( pad->GetDrillSize() );
                dummypad.SetOrientation( pad->GetOrientation() );
                dummypad.SetShape( pad->GetDrillShape() == PAD_DRILL_SHAPE_OBLONG ?
                                   PAD_SHAPE_OVAL : PAD_SHAPE_CIRCLE );
                dummypad.SetPosition( pad->GetPosition() );

                pad = &dummypad;
            }

            // Note: netcode <=0 means not connected item
            if( ( pad->GetNetCode() != GetNetCode() ) || ( pad->GetNetCode() <= 0 ) )
            {
                item_clearance   = pad->GetClearance() + outline_half_thickness;
                item_boundingbox = pad->GetBoundingBox();
                item_boundingbox.Inflate( item_clearance );

                if( item_boundingbox.Intersects( zone_boundingbox ) )
                {
                    int clearance = std::max( zone_clearance, item_clearance );
                    pad->TransformShapeWithClearanceToPolygon( aFeatures,
                                                               clearance,
                                                               segsPerCircle,
                                                               correctionFactor );
                }

//.........这里部分代码省略.........

void DRC::testTexts()
{
    std::vector<wxPoint> textShape;      // a buffer to store the text shape (set of segments)
    std::vector<D_PAD*> padList = m_pcb->GetPads();

    // Test text areas for vias, tracks and pads inside text areas
    for( BOARD_ITEM* item = m_pcb->m_Drawings; item; item = item->Next() )
    {
        // Drc test only items on copper layers
        if( ! IsCopperLayer( item->GetLayer() ) )
            continue;

        // only texts on copper layers are tested
        if( item->Type() !=  PCB_TEXT_T )
            continue;

        textShape.clear();

        // So far the bounding box makes up the text-area
        TEXTE_PCB* text = (TEXTE_PCB*) item;
        text->TransformTextShapeToSegmentList( textShape );

        if( textShape.size() == 0 )     // Should not happen (empty text?)
            continue;

        for( TRACK* track = m_pcb->m_Track; track != NULL; track = track->Next() )
        {
            if( ! track->IsOnLayer( item->GetLayer() ) )
                    continue;

            // Test the distance between each segment and the current track/via
            int min_dist = ( track->GetWidth() + text->GetThickness() ) /2 +
                           track->GetClearance(NULL);

            if( track->Type() == PCB_TRACE_T )
            {
                SEG segref( track->GetStart(), track->GetEnd() );

                // Error condition: Distance between text segment and track segment is
                // smaller than the clearance of the segment
                for( unsigned jj = 0; jj < textShape.size(); jj += 2 )
                {
                    SEG segtest( textShape[jj], textShape[jj+1] );
                    int dist = segref.Distance( segtest );

                    if( dist < min_dist )
                    {
                        addMarkerToPcb( fillMarker( track, text,
                                                    DRCE_TRACK_INSIDE_TEXT,
                                                    m_currentMarker ) );
                        m_currentMarker = nullptr;
                        break;
                    }
                }
            }
            else if( track->Type() == PCB_VIA_T )
            {
                // Error condition: Distance between text segment and via is
                // smaller than the clearance of the via
                for( unsigned jj = 0; jj < textShape.size(); jj += 2 )
                {
                    SEG segtest( textShape[jj], textShape[jj+1] );

                    if( segtest.PointCloserThan( track->GetPosition(), min_dist ) )
                    {
                        addMarkerToPcb( fillMarker( track, text,
                                                    DRCE_VIA_INSIDE_TEXT, m_currentMarker ) );
                        m_currentMarker = nullptr;
                        break;
                    }
                }
            }
        }

        // Test pads
        for( unsigned ii = 0; ii < padList.size(); ii++ )
        {
            D_PAD* pad = padList[ii];

            if( ! pad->IsOnLayer( item->GetLayer() ) )
                    continue;

            wxPoint shape_pos = pad->ShapePos();

            for( unsigned jj = 0; jj < textShape.size(); jj += 2 )
            {
                /* In order to make some calculations more easier or faster,
                 * pads and tracks coordinates will be made relative
                 * to the segment origin
                 */
                wxPoint origin = textShape[jj];  // origin will be the origin of other coordinates
                m_segmEnd = textShape[jj+1] - origin;
                wxPoint delta = m_segmEnd;
                m_segmAngle = 0;

                // for a non horizontal or vertical segment Compute the segment angle
                // in tenths of degrees and its length
                if( delta.x || delta.y )    // delta.x == delta.y == 0 for vias
                {
                    // Compute the segment angle in 0,1 degrees
//.........这里部分代码省略.........

/**
 * Function AddClearanceAreasPolygonsToPolysList
 * Supports a min thickness area constraint.
 * Add non copper areas polygons (pads and tracks with clearance)
 * to the filled copper area found
 * in BuildFilledPolysListData after calculating filled areas in a zone
 * Non filled copper areas are pads and track and their clearance areas
 * The filled copper area must be computed just before.
 * BuildFilledPolysListData() call this function just after creating the
 *  filled copper area polygon (without clearance areas)
 * to do that this function:
 * 1 - Creates the main outline (zone outline) using a correction to shrink the resulting area
 *     with m_ZoneMinThickness/2 value.
 *     The result is areas with a margin of m_ZoneMinThickness/2
 *     When drawing outline with segments having a thickness of m_ZoneMinThickness, the
 *      outlines will match exactly the initial outlines
 * 3 - Add all non filled areas (pads, tracks) in group B with a clearance of m_Clearance +
 *     m_ZoneMinThickness/2
 *     in a buffer
 *   - If Thermal shapes are wanted, add non filled area, in order to create these thermal shapes
 * 4 - calculates the polygon A - B
 * 5 - put resulting list of polygons (filled areas) in m_FilledPolysList
 *     This zone contains pads with the same net.
 * 6 - Remove insulated copper islands
 * 7 - If Thermal shapes are wanted, remove unconnected stubs in thermal shapes:
 *     creates a buffer of polygons corresponding to stubs to remove
 *     sub them to the filled areas.
 *     Remove new insulated copper islands
 */
void ZONE_CONTAINER::AddClearanceAreasPolygonsToPolysList( BOARD* aPcb )
{
    // Set the number of segments in arc approximations
    if( m_ArcToSegmentsCount == ARC_APPROX_SEGMENTS_COUNT_HIGHT_DEF  )
        s_CircleToSegmentsCount = ARC_APPROX_SEGMENTS_COUNT_HIGHT_DEF;
    else
        s_CircleToSegmentsCount = ARC_APPROX_SEGMENTS_COUNT_LOW_DEF;

    /* calculates the coeff to compensate radius reduction of holes clearance
     * due to the segment approx.
     * For a circle the min radius is radius * cos( 2PI / s_CircleToSegmentsCount / 2)
     * s_Correction is 1 /cos( PI/s_CircleToSegmentsCount  )
     */
    s_Correction = 1.0 / cos( M_PI / s_CircleToSegmentsCount );

    // This KI_POLYGON_SET is the area(s) to fill, with m_ZoneMinThickness/2
    KI_POLYGON_SET polyset_zone_solid_areas;
    int         margin = m_ZoneMinThickness / 2;

    /* First, creates the main polygon (i.e. the filled area using only one outline)
     * to reserve a m_ZoneMinThickness/2 margin around the outlines and holes
     * this margin is the room to redraw outlines with segments having a width set to
     * m_ZoneMinThickness
     * so m_ZoneMinThickness is the min thickness of the filled zones areas
     * the main polygon is stored in polyset_zone_solid_areas
     */

    CopyPolygonsFromFilledPolysListToKiPolygonList( polyset_zone_solid_areas );
    polyset_zone_solid_areas -= margin;

    if( polyset_zone_solid_areas.size() == 0 )
        return;

    /* Calculates the clearance value that meet DRC requirements
     * from m_ZoneClearance and clearance from the corresponding netclass
     * We have a "local" clearance in zones because most of time
     * clearance between a zone and others items is bigger than the netclass clearance
     * this is more true for small clearance values
     * Note also the "local" clearance is used for clearance between non copper items
     *    or items like texts on copper layers
     */
    int zone_clearance = std::max( m_ZoneClearance, GetClearance() );
    zone_clearance += margin;

    /* store holes (i.e. tracks and pads areas as polygons outlines)
     * in a polygon list
     */

    /* items ouside the zone bounding box are skipped
     * the bounding box is the zone bounding box + the biggest clearance found in Netclass list
     */
    EDA_RECT item_boundingbox;
    EDA_RECT zone_boundingbox  = GetBoundingBox();
    int      biggest_clearance = aPcb->GetDesignSettings().GetBiggestClearanceValue();
    biggest_clearance = std::max( biggest_clearance, zone_clearance );
    zone_boundingbox.Inflate( biggest_clearance );

    /*
     * First : Add pads. Note: pads having the same net as zone are left in zone.
     * Thermal shapes will be created later if necessary
     */
    int item_clearance;

    // static to avoid unnecessary memory allocation when filling many zones.
    static CPOLYGONS_LIST cornerBufferPolysToSubstract;
    cornerBufferPolysToSubstract.RemoveAllContours();

    /* Use a dummy pad to calculate hole clerance when a pad is not on all copper layers
     * and this pad has a hole
     * This dummy pad has the size and shape of the hole
    * Therefore, this dummy pad is a circle or an oval.
//.........这里部分代码省略.........