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 );
}
continue;
}
// Pads are removed from zone if the setup is PAD_ZONE_CONN_NONE
if( GetPadConnection( pad ) == PAD_ZONE_CONN_NONE )
{
int gap = zone_clearance;
int thermalGap = GetThermalReliefGap( pad );
gap = std::max( gap, thermalGap );
item_boundingbox = pad->GetBoundingBox();
item_boundingbox.Inflate( gap );
if( item_boundingbox.Intersects( zone_boundingbox ) )
{
pad->TransformShapeWithClearanceToPolygon( aFeatures,
gap,
segsPerCircle,
correctionFactor );
}
}
}
}
/* Add holes (i.e. tracks and vias areas as polygons outlines)
* in cornerBufferPolysToSubstract
*/
for( TRACK* track = aPcb->m_Track; track; track = track->Next() )
{
if( !track->IsOnLayer( GetLayer() ) )
continue;
if( track->GetNetCode() == GetNetCode() && (GetNetCode() != 0) )
continue;
item_clearance = track->GetClearance() + outline_half_thickness;
item_boundingbox = track->GetBoundingBox();
if( item_boundingbox.Intersects( zone_boundingbox ) )
{
int clearance = std::max( zone_clearance, item_clearance );
track->TransformShapeWithClearanceToPolygon( aFeatures,
clearance,
segsPerCircle,
correctionFactor );
}
}
/* Add module edge items that are on copper layers
* Pcbnew allows these items to be on copper layers in microwave applictions
* This is a bad thing, but must be handled here, until a better way is found
*/
for( MODULE* module = aPcb->m_Modules; module; module = module->Next() )
{
for( BOARD_ITEM* item = module->GraphicalItems(); item; item = item->Next() )
{
if( !item->IsOnLayer( GetLayer() ) && !item->IsOnLayer( Edge_Cuts ) )
continue;
if( item->Type() != PCB_MODULE_EDGE_T )
continue;
item_boundingbox = item->GetBoundingBox();
if( item_boundingbox.Intersects( zone_boundingbox ) )
{
( (EDGE_MODULE*) item )->TransformShapeWithClearanceToPolygon(
aFeatures, zone_clearance,
segsPerCircle, correctionFactor );
}
}
}
// Add graphic items (copper texts) and board edges
for( BOARD_ITEM* item = aPcb->m_Drawings; item; item = item->Next() )
{
if( item->GetLayer() != GetLayer() && item->GetLayer() != Edge_Cuts )
continue;
switch( item->Type() )
{
case PCB_LINE_T:
( (DRAWSEGMENT*) item )->TransformShapeWithClearanceToPolygon(
aFeatures,
zone_clearance, segsPerCircle, correctionFactor );
break;
case PCB_TEXT_T:
( (TEXTE_PCB*) item )->TransformBoundingBoxWithClearanceToPolygon(
aFeatures, zone_clearance );
break;
default:
break;
}
}
// Add zones outlines having an higher priority and keepout
for( int ii = 0; ii < GetBoard()->GetAreaCount(); ii++ )
{
ZONE_CONTAINER* zone = GetBoard()->GetArea( ii );
if( zone->GetLayer() != GetLayer() )
continue;
if( !zone->GetIsKeepout() && zone->GetPriority() <= GetPriority() )
continue;
if( zone->GetIsKeepout() && ! zone->GetDoNotAllowCopperPour() )
continue;
// A highter priority zone or keepout area is found: remove this area
item_boundingbox = zone->GetBoundingBox();
if( !item_boundingbox.Intersects( zone_boundingbox ) )
continue;
// Add the zone outline area.
// However if the zone has the same net as the current zone,
// do not add any clearance.
// the zone will be connected to the current zone, but filled areas
// will use different parameters (clearance, thermal shapes )
bool same_net = GetNetCode() == zone->GetNetCode();
bool use_net_clearance = true;
int min_clearance = zone_clearance;
// Do not forget to make room to draw the thick outlines
// of the hole created by the area of the zone to remove
int holeclearance = zone->GetClearance() + outline_half_thickness;
// The final clearance is obviously the max value of each zone clearance
min_clearance = std::max( min_clearance, holeclearance );
if( zone->GetIsKeepout() || same_net )
{
// Just take in account the fact the outline has a thickness, so
// the actual area to substract is inflated to take in account this fact
min_clearance = outline_half_thickness;
use_net_clearance = false;
}
zone->TransformOutlinesShapeWithClearanceToPolygon(
aFeatures,
min_clearance, use_net_clearance );
}
// Remove thermal symbols
for( MODULE* module = aPcb->m_Modules; module; module = module->Next() )
{
for( D_PAD* pad = module->Pads(); pad != NULL; pad = pad->Next() )
{
// Rejects non-standard pads with tht-only thermal reliefs
if( GetPadConnection( pad ) == PAD_ZONE_CONN_THT_THERMAL
&& pad->GetAttribute() != PAD_ATTRIB_STANDARD )
continue;
if( GetPadConnection( pad ) != PAD_ZONE_CONN_THERMAL
&& GetPadConnection( pad ) != PAD_ZONE_CONN_THT_THERMAL )
continue;
if( !pad->IsOnLayer( GetLayer() ) )
continue;
if( pad->GetNetCode() != GetNetCode() )
continue;
item_boundingbox = pad->GetBoundingBox();
int thermalGap = GetThermalReliefGap( pad );
item_boundingbox.Inflate( thermalGap, thermalGap );
if( item_boundingbox.Intersects( zone_boundingbox ) )
{
CreateThermalReliefPadPolygon( aFeatures,
*pad, thermalGap,
GetThermalReliefCopperBridge( pad ),
m_ZoneMinThickness,
segsPerCircle,
correctionFactor, s_thermalRot );
}
}
}
}
void ZONE_FILLER::buildZoneFeatureHoleList( const ZONE_CONTAINER* aZone,
SHAPE_POLY_SET& aFeatures ) const
{
int segsPerCircle;
double correctionFactor;
// Set the number of segments in arc approximations
if( aZone->GetArcSegmentCount() == 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 = aZone->GetMinThickness() / 2;
// When removing holes, the holes must be expanded by outline_half_thickness
// to take in account the thickness of the zone outlines
int zone_clearance = aZone->GetClearance() + outline_half_thickness;
// When holes are created by non copper items (edge cut items), use only
// the m_ZoneClearance parameter (zone clearance with no netclass clearance)
int zone_to_edgecut_clearance = aZone->GetZoneClearance() + 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 = aZone->GetBoundingBox();
int biggest_clearance = m_board->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
*/
/* Use a dummy pad to calculate hole clearance 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( m_board ); // Creates a dummy parent
D_PAD dummypad( &dummymodule );
for( MODULE* module = m_board->m_Modules; module; module = module->Next() )
{
D_PAD* nextpad;
for( D_PAD* pad = module->PadsList(); pad != NULL; pad = nextpad )
{
nextpad = pad->Next(); // pad pointer can be modified by next code, so
// calculate the next pad here
if( !pad->IsOnLayer( aZone->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() != aZone->GetNetCode() ) || ( pad->GetNetCode() <= 0 ) )
{
int 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_SHAPE_CUSTOM can have a specific keepout, to avoid to break the shape
if( pad->GetShape() == PAD_SHAPE_CUSTOM
&& pad->GetCustomShapeInZoneOpt() == CUST_PAD_SHAPE_IN_ZONE_CONVEXHULL )
{
// the pad shape in zone can be its convex hull or
// the shape itself
SHAPE_POLY_SET outline( pad->GetCustomShapeAsPolygon() );
outline.Inflate( KiROUND( clearance * correctionFactor ), segsPerCircle );
pad->CustomShapeAsPolygonToBoardPosition( &outline,
pad->GetPosition(), pad->GetOrientation() );
if( pad->GetCustomShapeInZoneOpt() == CUST_PAD_SHAPE_IN_ZONE_CONVEXHULL )
{
std::vector<wxPoint> convex_hull;
BuildConvexHull( convex_hull, outline );
aFeatures.NewOutline();
for( unsigned ii = 0; ii < convex_hull.size(); ++ii )
aFeatures.Append( convex_hull[ii] );
}
else
aFeatures.Append( outline );
}
else
pad->TransformShapeWithClearanceToPolygon( aFeatures,
clearance,
segsPerCircle,
correctionFactor );
}
continue;
}
// Pads are removed from zone if the setup is PAD_ZONE_CONN_NONE
// or if they have a custom shape, because a thermal relief will break
// the shape
if( aZone->GetPadConnection( pad ) == PAD_ZONE_CONN_NONE
|| pad->GetShape() == PAD_SHAPE_CUSTOM )
{
int gap = zone_clearance;
int thermalGap = aZone->GetThermalReliefGap( pad );
gap = std::max( gap, thermalGap );
item_boundingbox = pad->GetBoundingBox();
item_boundingbox.Inflate( gap );
if( item_boundingbox.Intersects( zone_boundingbox ) )
{
// PAD_SHAPE_CUSTOM has a specific keepout, to avoid to break the shape
// the pad shape in zone can be its convex hull or the shape itself
if( pad->GetShape() == PAD_SHAPE_CUSTOM
&& pad->GetCustomShapeInZoneOpt() == CUST_PAD_SHAPE_IN_ZONE_CONVEXHULL )
{
// the pad shape in zone can be its convex hull or
// the shape itself
SHAPE_POLY_SET outline( pad->GetCustomShapeAsPolygon() );
outline.Inflate( KiROUND( gap * correctionFactor ), segsPerCircle );
pad->CustomShapeAsPolygonToBoardPosition( &outline,
pad->GetPosition(), pad->GetOrientation() );
std::vector<wxPoint> convex_hull;
BuildConvexHull( convex_hull, outline );
aFeatures.NewOutline();
for( unsigned ii = 0; ii < convex_hull.size(); ++ii )
aFeatures.Append( convex_hull[ii] );
}
else
pad->TransformShapeWithClearanceToPolygon( aFeatures,
gap, segsPerCircle, correctionFactor );
}
}
}
}
/* Add holes (i.e. tracks and vias areas as polygons outlines)
* in cornerBufferPolysToSubstract
*/
for( auto track : m_board->Tracks() )
{
if( !track->IsOnLayer( aZone->GetLayer() ) )
continue;
if( track->GetNetCode() == aZone->GetNetCode() && ( aZone->GetNetCode() != 0) )
continue;
int item_clearance = track->GetClearance() + outline_half_thickness;
item_boundingbox = track->GetBoundingBox();
if( item_boundingbox.Intersects( zone_boundingbox ) )
{
int clearance = std::max( zone_clearance, item_clearance );
track->TransformShapeWithClearanceToPolygon( aFeatures,
clearance,
segsPerCircle,
correctionFactor );
}
}
/* Add module edge items that are on copper layers
* Pcbnew allows these items to be on copper layers in microwave applictions
* This is a bad thing, but must be handled here, until a better way is found
*/
for( auto module : m_board->Modules() )
{
for( auto item : module->GraphicalItems() )
{
if( !item->IsOnLayer( aZone->GetLayer() ) && !item->IsOnLayer( Edge_Cuts ) )
continue;
if( item->Type() != PCB_MODULE_EDGE_T )
continue;
item_boundingbox = item->GetBoundingBox();
if( item_boundingbox.Intersects( zone_boundingbox ) )
{
int zclearance = zone_clearance;
if( item->IsOnLayer( Edge_Cuts ) )
// use only the m_ZoneClearance, not the clearance using
// the netclass value, because we do not have a copper item
zclearance = zone_to_edgecut_clearance;
( (EDGE_MODULE*) item )->TransformShapeWithClearanceToPolygon(
aFeatures, zclearance, segsPerCircle, correctionFactor );
}
}
}
// Add graphic items (copper texts) and board edges
// Currently copper texts have no net, so only the zone_clearance
// is used.
for( auto item : m_board->Drawings() )
{
if( item->GetLayer() != aZone->GetLayer() && item->GetLayer() != Edge_Cuts )
continue;
int zclearance = zone_clearance;
if( item->GetLayer() == Edge_Cuts )
// use only the m_ZoneClearance, not the clearance using
// the netclass value, because we do not have a copper item
zclearance = zone_to_edgecut_clearance;
switch( item->Type() )
{
case PCB_LINE_T:
( (DRAWSEGMENT*) item )->TransformShapeWithClearanceToPolygon(
aFeatures,
zclearance, segsPerCircle, correctionFactor );
break;
case PCB_TEXT_T:
( (TEXTE_PCB*) item )->TransformBoundingBoxWithClearanceToPolygon(
aFeatures, zclearance );
break;
default:
break;
}
}
// Add zones outlines having an higher priority and keepout
for( int ii = 0; ii < m_board->GetAreaCount(); ii++ )
{
ZONE_CONTAINER* zone = m_board->GetArea( ii );
// If the zones share no common layers
if( !aZone->CommonLayerExists( zone->GetLayerSet() ) )
continue;
if( !zone->GetIsKeepout() && zone->GetPriority() <= aZone->GetPriority() )
continue;
if( zone->GetIsKeepout() && !zone->GetDoNotAllowCopperPour() )
continue;
// A highter priority zone or keepout area is found: remove this area
item_boundingbox = zone->GetBoundingBox();
if( !item_boundingbox.Intersects( zone_boundingbox ) )
continue;
// Add the zone outline area.
// However if the zone has the same net as the current zone,
// do not add any clearance.
// the zone will be connected to the current zone, but filled areas
// will use different parameters (clearance, thermal shapes )
bool same_net = aZone->GetNetCode() == zone->GetNetCode();
bool use_net_clearance = true;
int min_clearance = zone_clearance;
// Do not forget to make room to draw the thick outlines
// of the hole created by the area of the zone to remove
int holeclearance = zone->GetClearance() + outline_half_thickness;
// The final clearance is obviously the max value of each zone clearance
min_clearance = std::max( min_clearance, holeclearance );
if( zone->GetIsKeepout() || same_net )
{
// Just take in account the fact the outline has a thickness, so
// the actual area to substract is inflated to take in account this fact
min_clearance = outline_half_thickness;
use_net_clearance = false;
}
zone->TransformOutlinesShapeWithClearanceToPolygon(
aFeatures, min_clearance, use_net_clearance );
}
// Remove thermal symbols
for( auto module : m_board->Modules() )
{
for( auto pad : module->Pads() )
{
// Rejects non-standard pads with tht-only thermal reliefs
if( aZone->GetPadConnection( pad ) == PAD_ZONE_CONN_THT_THERMAL
&& pad->GetAttribute() != PAD_ATTRIB_STANDARD )
continue;
if( aZone->GetPadConnection( pad ) != PAD_ZONE_CONN_THERMAL
&& aZone->GetPadConnection( pad ) != PAD_ZONE_CONN_THT_THERMAL )
continue;
if( !pad->IsOnLayer( aZone->GetLayer() ) )
continue;
if( pad->GetNetCode() != aZone->GetNetCode() )
continue;
item_boundingbox = pad->GetBoundingBox();
int thermalGap = aZone->GetThermalReliefGap( pad );
item_boundingbox.Inflate( thermalGap, thermalGap );
if( item_boundingbox.Intersects( zone_boundingbox ) )
{
CreateThermalReliefPadPolygon( aFeatures,
*pad, thermalGap,
aZone->GetThermalReliefCopperBridge( pad ),
aZone->GetMinThickness(),
segsPerCircle,
correctionFactor, s_thermalRot );
}
}
}
}
/**
* 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.
* 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_OBLONG ?
PAD_OVAL : PAD_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() + margin;
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( cornerBufferPolysToSubstract,
clearance,
s_CircleToSegmentsCount,
s_Correction );
}
continue;
}
if( ( GetPadConnection( pad ) == PAD_NOT_IN_ZONE )
|| ( pad->GetShape() == PAD_TRAPEZOID ) )
// PAD_TRAPEZOID shapes are not in zones because they are used in microwave apps
// and i think it is good that shapes are not changed by thermal pads or others
{
int gap = zone_clearance;
int thermalGap = GetThermalReliefGap( pad );
gap = std::max( gap, thermalGap );
item_boundingbox = pad->GetBoundingBox();
if( item_boundingbox.Intersects( zone_boundingbox ) )
{
pad->TransformShapeWithClearanceToPolygon( cornerBufferPolysToSubstract,
gap,
s_CircleToSegmentsCount,
s_Correction );
}
}
}
}
/* Add holes (i.e. tracks and vias areas as polygons outlines)
* in cornerBufferPolysToSubstract
*/
for( TRACK* track = aPcb->m_Track; track; track = track->Next() )
{
if( !track->IsOnLayer( GetLayer() ) )
continue;
if( track->GetNetCode() == GetNetCode() && (GetNetCode() != 0) )
continue;
item_clearance = track->GetClearance() + margin;
item_boundingbox = track->GetBoundingBox();
if( item_boundingbox.Intersects( zone_boundingbox ) )
{
int clearance = std::max( zone_clearance, item_clearance );
track->TransformShapeWithClearanceToPolygon( cornerBufferPolysToSubstract,
clearance,
s_CircleToSegmentsCount,
s_Correction );
}
}
/* Add module edge items that are on copper layers
* Pcbnew allows these items to be on copper layers in microwave applictions
* This is a bad thing, but must be handled here, until a better way is found
*/
for( MODULE* module = aPcb->m_Modules; module; module = module->Next() )
{
for( BOARD_ITEM* item = module->GraphicalItems(); item; item = item->Next() )
{
if( !item->IsOnLayer( GetLayer() ) && !item->IsOnLayer( Edge_Cuts ) )
continue;
if( item->Type() != PCB_MODULE_EDGE_T )
continue;
item_boundingbox = item->GetBoundingBox();
if( item_boundingbox.Intersects( zone_boundingbox ) )
{
( (EDGE_MODULE*) item )->TransformShapeWithClearanceToPolygon(
cornerBufferPolysToSubstract, zone_clearance,
s_CircleToSegmentsCount, s_Correction );
}
}
}
// Add graphic items (copper texts) and board edges
for( BOARD_ITEM* item = aPcb->m_Drawings; item; item = item->Next() )
{
if( item->GetLayer() != GetLayer() && item->GetLayer() != Edge_Cuts )
continue;
switch( item->Type() )
{
case PCB_LINE_T:
( (DRAWSEGMENT*) item )->TransformShapeWithClearanceToPolygon(
cornerBufferPolysToSubstract,
zone_clearance, s_CircleToSegmentsCount, s_Correction );
break;
case PCB_TEXT_T:
( (TEXTE_PCB*) item )->TransformBoundingBoxWithClearanceToPolygon(
cornerBufferPolysToSubstract, zone_clearance );
break;
default:
break;
}
}
// Add zones outlines having an higher priority and keepout
for( int ii = 0; ii < GetBoard()->GetAreaCount(); ii++ )
{
ZONE_CONTAINER* zone = GetBoard()->GetArea( ii );
if( zone->GetLayer() != GetLayer() )
continue;
if( !zone->GetIsKeepout() && zone->GetPriority() <= GetPriority() )
continue;
if( zone->GetIsKeepout() && ! zone->GetDoNotAllowCopperPour() )
continue;
// A highter priority zone or keepout area is found: remove its area
item_boundingbox = zone->GetBoundingBox();
if( !item_boundingbox.Intersects( zone_boundingbox ) )
continue;
// Add the zone outline area.
// However if the zone has the same net as the current zone,
// do not add clearance.
// the zone will be connected to the current zone, but filled areas
// will use different parameters (clearance, thermal shapes )
bool addclearance = GetNetCode() != zone->GetNetCode();
int clearance = zone_clearance;
if( zone->GetIsKeepout() )
{
addclearance = true;
clearance = m_ZoneMinThickness / 2;
}
zone->TransformOutlinesShapeWithClearanceToPolygon(
cornerBufferPolysToSubstract,
clearance, addclearance );
}
// Remove thermal symbols
for( MODULE* module = aPcb->m_Modules; module; module = module->Next() )
{
for( D_PAD* pad = module->Pads(); pad != NULL; pad = pad->Next() )
{
// Rejects non-standard pads with tht-only thermal reliefs
if( GetPadConnection( pad ) == THT_THERMAL
&& pad->GetAttribute() != PAD_STANDARD )
continue;
if( GetPadConnection( pad ) != THERMAL_PAD
&& GetPadConnection( pad ) != THT_THERMAL )
continue;
if( !pad->IsOnLayer( GetLayer() ) )
continue;
if( pad->GetNetCode() != GetNetCode() )
continue;
item_boundingbox = pad->GetBoundingBox();
int thermalGap = GetThermalReliefGap( pad );
item_boundingbox.Inflate( thermalGap, thermalGap );
if( item_boundingbox.Intersects( zone_boundingbox ) )
{
CreateThermalReliefPadPolygon( cornerBufferPolysToSubstract,
*pad, thermalGap,
GetThermalReliefCopperBridge( pad ),
m_ZoneMinThickness,
s_CircleToSegmentsCount,
s_Correction, s_thermalRot );
}
}
}
// cornerBufferPolysToSubstract contains polygons to substract.
// polyset_zone_solid_areas contains the main filled area
// Calculate now actual solid areas
if( cornerBufferPolysToSubstract.GetCornersCount() > 0 )
{
KI_POLYGON_SET polyset_holes;
cornerBufferPolysToSubstract.ExportTo( polyset_holes );
// Remove holes from initial area.:
polyset_zone_solid_areas -= polyset_holes;
}
// put solid areas in m_FilledPolysList:
m_FilledPolysList.RemoveAllContours();
CopyPolygonsFromKiPolygonListToFilledPolysList( polyset_zone_solid_areas );
// Remove insulated islands:
if( GetNetCode() > 0 )
TestForCopperIslandAndRemoveInsulatedIslands( aPcb );
// Now we remove all unused thermal stubs.
cornerBufferPolysToSubstract.RemoveAllContours();
// Test thermal stubs connections and add polygons to remove unconnected stubs.
// (this is a refinement for thermal relief shapes)
if( GetNetCode() > 0 )
BuildUnconnectedThermalStubsPolygonList( cornerBufferPolysToSubstract, aPcb, this,
s_Correction, s_thermalRot );
// remove copper areas corresponding to not connected stubs
if( cornerBufferPolysToSubstract.GetCornersCount() )
{
KI_POLYGON_SET polyset_holes;
cornerBufferPolysToSubstract.ExportTo( polyset_holes );
// Remove unconnected stubs
polyset_zone_solid_areas -= polyset_holes;
// put these areas in m_FilledPolysList
m_FilledPolysList.RemoveAllContours();
CopyPolygonsFromKiPolygonListToFilledPolysList( polyset_zone_solid_areas );
if( GetNetCode() > 0 )
TestForCopperIslandAndRemoveInsulatedIslands( aPcb );
}
cornerBufferPolysToSubstract.RemoveAllContours();
}
/* Plot a solder mask layer.
* Solder mask layers have a minimum thickness value and cannot be drawn like standard layers,
* unless the minimum thickness is 0.
* Currently the algo is:
* 1 - build all pad shapes as polygons with a size inflated by
* mask clearance + (min width solder mask /2)
* 2 - Merge shapes
* 3 - deflate result by (min width solder mask /2)
* 4 - oring result by all pad shapes as polygons with a size inflated by
* mask clearance only (because deflate sometimes creates shape artifacts)
* 5 - draw result as polygons
*
* TODO:
* make this calculation only for shapes with clearance near than (min width solder mask)
* (using DRC algo)
* plot all other shapes by flashing the basing shape
* (shapes will be better, and calculations faster)
*/
void PlotSolderMaskLayer( BOARD *aBoard, PLOTTER* aPlotter,
LAYER_MSK aLayerMask, const PCB_PLOT_PARAMS& aPlotOpt,
int aMinThickness )
{
LAYER_NUM layer = ( aLayerMask & SOLDERMASK_LAYER_BACK ) ?
SOLDERMASK_N_BACK : SOLDERMASK_N_FRONT;
int inflate = aMinThickness/2;
BRDITEMS_PLOTTER itemplotter( aPlotter, aBoard, aPlotOpt );
itemplotter.SetLayerMask( aLayerMask );
// Plot edge layer and graphic items
itemplotter.PlotBoardGraphicItems();
for( MODULE* module = aBoard->m_Modules; module; module = module->Next() )
{
for( BOARD_ITEM* item = module->GraphicalItems(); item; item = item->Next() )
{
if( layer != item->GetLayer() )
continue;
switch( item->Type() )
{
case PCB_MODULE_EDGE_T:
itemplotter.Plot_1_EdgeModule( (EDGE_MODULE*) item );
break;
default:
break;
}
}
}
// Build polygons for each pad shape.
// the size of the shape on solder mask should be:
// size of pad + clearance around the pad.
// clearance = solder mask clearance + extra margin
// extra margin is half the min width for solder mask
// This extra margin is used to merge too close shapes
// (distance < aMinThickness), and will be removed when creating
// the actual shapes
CPOLYGONS_LIST bufferPolys; // Contains shapes to plot
CPOLYGONS_LIST initialPolys; // Contains exact shapes to plot
/* calculates the coeff to compensate radius reduction of holes clearance
* due to the segment approx ( 1 /cos( PI/circleToSegmentsCount )
*/
int circleToSegmentsCount = 32;
double correction = 1.0 / cos( M_PI / circleToSegmentsCount );
// Plot pads
for( MODULE* module = aBoard->m_Modules; module; module = module->Next() )
{
// add shapes with exact size
module->TransformPadsShapesWithClearanceToPolygon( layer,
initialPolys, 0,
circleToSegmentsCount, correction );
// add shapes inflated by aMinThickness/2
module->TransformPadsShapesWithClearanceToPolygon( layer,
bufferPolys, inflate,
circleToSegmentsCount, correction );
}
// Plot vias on solder masks, if aPlotOpt.GetPlotViaOnMaskLayer() is true,
if( aPlotOpt.GetPlotViaOnMaskLayer() )
{
// The current layer is a solder mask,
// use the global mask clearance for vias
int via_clearance = aBoard->GetDesignSettings().m_SolderMaskMargin;
int via_margin = via_clearance + inflate;
for( TRACK* track = aBoard->m_Track; track; track = track->Next() )
{
const VIA* via = dynamic_cast<const VIA*>( track );
if( !via )
continue;
// vias are plotted only if they are on the corresponding
// external copper layer
LAYER_MSK via_mask_layer = via->GetLayerMask();
if( via_mask_layer & LAYER_BACK )
via_mask_layer |= SOLDERMASK_LAYER_BACK;
if( via_mask_layer & LAYER_FRONT )
via_mask_layer |= SOLDERMASK_LAYER_FRONT;
if( ( via_mask_layer & aLayerMask ) == 0 )
continue;
via->TransformShapeWithClearanceToPolygon( bufferPolys, via_margin,
circleToSegmentsCount,
correction );
via->TransformShapeWithClearanceToPolygon( initialPolys, via_clearance,
circleToSegmentsCount,
correction );
}
}
// Add filled zone areas
for( int ii = 0; ii < aBoard->GetAreaCount(); ii++ )
{
ZONE_CONTAINER* zone = aBoard->GetArea( ii );
if( zone->GetLayer() != layer )
continue;
zone->TransformOutlinesShapeWithClearanceToPolygon( bufferPolys,
inflate, true );
}
// Now:
// 1 - merge areas which are intersecting, i.e. remove gaps
// having a thickness < aMinThickness
// 2 - deflate resulting areas by aMinThickness/2
KI_POLYGON_SET areasToMerge;
bufferPolys.ExportTo( areasToMerge );
KI_POLYGON_SET initialAreas;
initialPolys.ExportTo( initialAreas );
// Merge polygons: because each shape was created with an extra margin
// = aMinThickness/2, shapes too close ( dist < aMinThickness )
// will be merged, because they are overlapping
KI_POLYGON_SET areas;
areas |= areasToMerge;
// Deflate: remove the extra margin, to create the actual shapes
// Here I am using polygon:resize, because this function creates better shapes
// than deflate algo.
// Use here deflate with arc creation and 18 segments per circle to create arcs
// In boost polygon (at least v 1.54 and previous) in very rare cases resize crashes
// with 16 segments (perhaps related to 45 degrees pads). So using 18 segments
// is a workaround to try to avoid these crashes
areas = resize( areas, -inflate , true, 18 );
// Resize slightly changes shapes. So *ensure* initial shapes are kept
areas |= initialAreas;
// To avoid a lot of code, use a ZONE_CONTAINER
// to plot polygons, because they are exactly like
// filled areas in zones
ZONE_CONTAINER zone( aBoard );
zone.SetArcSegmentCount( 32 );
zone.SetMinThickness( 0 ); // trace polygons only
zone.SetLayer ( layer );
zone.CopyPolygonsFromKiPolygonListToFilledPolysList( areas );
itemplotter.PlotFilledAreas( &zone );
}
/* Plot a solder mask layer.
* Solder mask layers have a minimum thickness value and cannot be drawn like standard layers,
* unless the minimum thickness is 0.
* Currently the algo is:
* 1 - build all pad shapes as polygons with a size inflated by
* mask clearance + (min width solder mask /2)
* 2 - Merge shapes
* 3 - deflate result by (min width solder mask /2)
* 4 - oring result by all pad shapes as polygons with a size inflated by
* mask clearance only (because deflate sometimes creates shape artifacts)
* 5 - draw result as polygons
*
* TODO:
* make this calculation only for shapes with clearance near than (min width solder mask)
* (using DRC algo)
* plot all other shapes by flashing the basing shape
* (shapes will be better, and calculations faster)
*/
void PlotSolderMaskLayer( BOARD *aBoard, PLOTTER* aPlotter,
LSET aLayerMask, const PCB_PLOT_PARAMS& aPlotOpt,
int aMinThickness )
{
LAYER_ID layer = aLayerMask[B_Mask] ? B_Mask : F_Mask;
int inflate = aMinThickness/2;
BRDITEMS_PLOTTER itemplotter( aPlotter, aBoard, aPlotOpt );
itemplotter.SetLayerSet( aLayerMask );
// Plot edge layer and graphic items
// They do not have a solder Mask margin, because they are only graphic items
// on this layer (like logos), not actually areas around pads.
itemplotter.PlotBoardGraphicItems();
for( MODULE* module = aBoard->m_Modules; module; module = module->Next() )
{
for( BOARD_ITEM* item = module->GraphicalItems(); item; item = item->Next() )
{
if( layer != item->GetLayer() )
continue;
switch( item->Type() )
{
case PCB_MODULE_EDGE_T:
itemplotter.Plot_1_EdgeModule( (EDGE_MODULE*) item );
break;
default:
break;
}
}
}
// Build polygons for each pad shape.
// the size of the shape on solder mask should be:
// size of pad + clearance around the pad.
// clearance = solder mask clearance + extra margin
// extra margin is half the min width for solder mask
// This extra margin is used to merge too close shapes
// (distance < aMinThickness), and will be removed when creating
// the actual shapes
SHAPE_POLY_SET areas; // Contains shapes to plot
SHAPE_POLY_SET initialPolys; // Contains exact shapes to plot
/* calculates the coeff to compensate radius reduction of holes clearance
* due to the segment approx ( 1 /cos( PI/circleToSegmentsCount )
*/
int circleToSegmentsCount = 32;
double correction = 1.0 / cos( M_PI / circleToSegmentsCount );
// Plot pads
for( MODULE* module = aBoard->m_Modules; module; module = module->Next() )
{
// add shapes with exact size
module->TransformPadsShapesWithClearanceToPolygon( layer,
initialPolys, 0,
circleToSegmentsCount, correction );
// add shapes inflated by aMinThickness/2
module->TransformPadsShapesWithClearanceToPolygon( layer,
areas, inflate,
circleToSegmentsCount, correction );
}
// Plot vias on solder masks, if aPlotOpt.GetPlotViaOnMaskLayer() is true,
if( aPlotOpt.GetPlotViaOnMaskLayer() )
{
// The current layer is a solder mask,
// use the global mask clearance for vias
int via_clearance = aBoard->GetDesignSettings().m_SolderMaskMargin;
int via_margin = via_clearance + inflate;
for( TRACK* track = aBoard->m_Track; track; track = track->Next() )
{
const VIA* via = dyn_cast<const VIA*>( track );
if( !via )
continue;
// vias are plotted only if they are on the corresponding
// external copper layer
LSET via_set = via->GetLayerSet();
if( via_set[B_Cu] )
via_set.set( B_Mask );
if( via_set[F_Cu] )
via_set.set( F_Mask );
if( !( via_set & aLayerMask ).any() )
continue;
via->TransformShapeWithClearanceToPolygon( areas, via_margin,
circleToSegmentsCount,
correction );
via->TransformShapeWithClearanceToPolygon( initialPolys, via_clearance,
circleToSegmentsCount,
correction );
}
}
// Add filled zone areas.
#if 0 // Set to 1 if a solder mask margin must be applied to zones on solder mask
int zone_margin = aBoard->GetDesignSettings().m_SolderMaskMargin;
#else
int zone_margin = 0;
#endif
for( int ii = 0; ii < aBoard->GetAreaCount(); ii++ )
{
ZONE_CONTAINER* zone = aBoard->GetArea( ii );
if( zone->GetLayer() != layer )
continue;
zone->TransformOutlinesShapeWithClearanceToPolygon( areas,
inflate+zone_margin, false );
zone->TransformOutlinesShapeWithClearanceToPolygon( initialPolys,
zone_margin, false );
}
// To avoid a lot of code, use a ZONE_CONTAINER
// to handle and plot polygons, because our polygons look exactly like
// filled areas in zones
// Note, also this code is not optimized: it creates a lot of copy/duplicate data
// However it is not complex, and fast enough for plot purposes (copy/convert data
// is only a very small calculation time for these calculations)
ZONE_CONTAINER zone( aBoard );
zone.SetArcSegmentCount( 32 );
zone.SetMinThickness( 0 ); // trace polygons only
zone.SetLayer ( layer );
areas.BooleanAdd( initialPolys );
areas.Inflate( -inflate, circleToSegmentsCount );
// Combine the current areas to initial areas. This is mandatory because
// inflate/deflate transform is not perfect, and we want the initial areas perfectly kept
areas.BooleanAdd( initialPolys );
areas.Fracture();
zone.AddFilledPolysList( areas );
itemplotter.PlotFilledAreas( &zone );
}