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/*******************************************/
/* zones_convert_brd_items_to_polygons.cpp */
/*******************************************/
/* Functions to convert some board items to polygons
* (pads, tracks ..)
* This is used to calculate filled areas in copper zones.
* Filled areas are areas remainder of the full zone area after removed all polygons
* calculated from these items shapes and the clearance area
*
* Important note:
* Because filled areas must have a minimum thickness to match with Design rule, they are draw in 2 step:
* 1 - filled polygons are drawn
* 2 - polygon outlines are drawn with a "minimum thickness width" ( or with a minimum thickness pen )
* So outlines of filled polygons are calculated with the constraint they match with clearance,
* taking in account outlines have thickness
* This ensures:
* - areas meet the minimum thickness requirement.
* - shapes are smoothed.
*/
#include <math.h>
#include <vector>
#include "fctsys.h"
#include "polygons_defs.h"
#include "common.h"
#include "pcbnew.h"
#include "wxPcbStruct.h"
#include "trigo.h"
#include "zones.h"
#include "PolyLine.h"
extern void BuildUnconnectedThermalStubsPolygonList( std::vector<CPolyPt>& aCornerBuffer,
BOARD* aPcb, ZONE_CONTAINER* aZone,
double aArcCorrection,
int aRoundPadThermalRotation);
extern void Test_For_Copper_Island_And_Remove( BOARD* aPcb,
ZONE_CONTAINER* aZone_container );
extern void CreateThermalReliefPadPolygon( std::vector<CPolyPt>& aCornerBuffer,
D_PAD& aPad,
int aThermalGap,
int aCopperThickness,
int aMinThicknessValue,
int aCircleToSegmentsCount,
double aCorrectionFactor,
int aThermalRot );
// Local Functions: helper function to calculate solid areas
static void AddPolygonCornersToKPolygonList( std::vector <CPolyPt>& aCornersBuffer,
KPolygonSet& aKPolyList );
static int CopyPolygonsFromKPolygonListToFilledPolysList( ZONE_CONTAINER* aZone,
KPolygonSet& aKPolyList );
static int CopyPolygonsFromFilledPolysListTotKPolygonList( ZONE_CONTAINER* aZone,
KPolygonSet& aKPolyList );
// Local Variables:
static int s_thermalRot = 450; // angle of stubs in thermal reliefs for round pads
/* how many segments are used to create a polygon from a circle: */
static int s_CircleToSegmentsCount = ARC_APPROX_SEGMENTS_COUNT_LOW_DEF; /* default value. the real value will be changed to
* ARC_APPROX_SEGMENTS_COUNT_HIGHT_DEF
* if m_ArcToSegmentsCount == ARC_APPROX_SEGMENTS_COUNT_HIGHT_DEF
*/
double s_Correction; /* mult coeff used to enlarge rounded and oval pads (and vias)
* because the segment approximation for arcs and circles
* create a smaller gap than a true circle
*/
/**
* Function AddClearanceAreasPolygonsToPolysList
* Supports a min thickness area constraint.
* Add non copper areas polygons (pads and tracks with clearence)
* 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 clearence 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( 3.14159265 / s_CircleToSegmentsCount );
/* Uses a kbool engine to add holes in the m_FilledPolysList polygon.
* Because this function is called just after creating the m_FilledPolysList,
* only one polygon is in list.
* (initial holes in zones are linked into outer contours by double overlapping segments).
* because after adding holes, many polygons could be exist in this list.
*/
// This polygon set is the area(s) to fill, with m_ZoneMinThickness/2
KPolygonSet 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
*/
CopyPolygonsFromFilledPolysListTotKPolygonList( this,
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 = 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->GetBiggestClearanceValue();
biggest_clearance = 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 std::vector <CPolyPt> cornerBufferPolysToSubstract;
cornerBufferPolysToSubstract.clear();
/* 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 );
D_PAD* nextpad;
for( MODULE* module = aPcb->m_Modules; module; module = module->Next() )
{
for( D_PAD* pad = module->m_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->m_Drill.x == 0) && (pad->m_Drill.y == 0) )
continue;
// Use a dummy pad to calculate a hole shape that have the same dimension as the pad hole
dummypad.m_Size = pad->m_Drill;
dummypad.m_Orient = pad->m_Orient;
dummypad.m_PadShape = pad->m_DrillShape;
dummypad.m_Pos = pad->m_Pos;
pad = &dummypad;
}
if( pad->GetNet() != GetNet() )
{
item_clearance = pad->GetClearance() + margin;
item_boundingbox = pad->GetBoundingBox();
if( item_boundingbox.Intersects( zone_boundingbox ) )
{
int clearance = MAX( zone_clearance, item_clearance );
pad->TransformShapeWithClearanceToPolygon( cornerBufferPolysToSubstract,
clearance,
s_CircleToSegmentsCount,
s_Correction );
}
continue;
}
int gap = zone_clearance;
if( (m_PadOption == PAD_NOT_IN_ZONE)
|| (GetNet() == 0) || pad->m_PadShape == 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
{
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->GetNet() == GetNet() && (GetNet() != 0) )
continue;
item_clearance = track->GetClearance() + margin;
item_boundingbox = track->GetBoundingBox();
if( item_boundingbox.Intersects( zone_boundingbox ) )
{
int clearance = 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 handle here, until a better way is found
*/
for( MODULE* module = aPcb->m_Modules; module; module = module->Next() )
{
for( BOARD_ITEM* item = module->m_Drawings; item; item = item->Next() )
{
if( !item->IsOnLayer( GetLayer() ) )
continue;
if( item->Type() != TYPE_EDGE_MODULE )
continue;
item_boundingbox = item->GetBoundingBox();
if( item_boundingbox.Intersects( zone_boundingbox ) )
{
( (EDGE_MODULE*) item )->TransformShapeWithClearanceToPolygon(
cornerBufferPolysToSubstract, m_ZoneClearance,
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_N )
continue;
switch( item->Type() )
{
case TYPE_DRAWSEGMENT:
( (DRAWSEGMENT*) item )->TransformShapeWithClearanceToPolygon(
cornerBufferPolysToSubstract,
m_ZoneClearance,
s_CircleToSegmentsCount,
s_Correction );
break;
case TYPE_TEXTE:
( (TEXTE_PCB*) item )->TransformShapeWithClearanceToPolygon(
cornerBufferPolysToSubstract,
m_ZoneClearance,
s_CircleToSegmentsCount,
s_Correction );
break;
default:
break;
}
}
// Remove thermal symbols
if( m_PadOption == THERMAL_PAD )
{
for( MODULE* module = aPcb->m_Modules; module; module = module->Next() )
{
for( D_PAD* pad = module->m_Pads; pad != NULL; pad = pad->Next() )
{
if( !pad->IsOnLayer( GetLayer() ) )
continue;
if( pad->GetNet() != GetNet() )
continue;
item_boundingbox = pad->GetBoundingBox();
item_boundingbox.Inflate( m_ThermalReliefGapValue, m_ThermalReliefGapValue );
if( item_boundingbox.Intersects( zone_boundingbox ) )
{
CreateThermalReliefPadPolygon( cornerBufferPolysToSubstract,
*pad, m_ThermalReliefGapValue,
m_ThermalReliefCopperBridgeValue,
m_ZoneMinThickness,
s_CircleToSegmentsCount,
s_Correction, s_thermalRot );
}
}
}
}
// cornerBufferPolysToSubstract contains polygons to substract.
// Calculate now actual solid areas
if( cornerBufferPolysToSubstract.size() > 0 )
{
KPolygonSet polyset_holes;
AddPolygonCornersToKPolygonList( cornerBufferPolysToSubstract,
polyset_holes );
// Remove holes from initial area.:
polyset_zone_solid_areas -= polyset_holes;
/* put these areas in m_FilledPolysList */
m_FilledPolysList.clear();
CopyPolygonsFromKPolygonListToFilledPolysList( this, polyset_zone_solid_areas );
}
// Remove insulated islands:
if( GetNet() > 0 )
Test_For_Copper_Island_And_Remove_Insulated_Islands( aPcb );
// Now we remove all unused thermal stubs.
if( m_PadOption == THERMAL_PAD )
{
cornerBufferPolysToSubstract.clear();
// Test thermal stubs connections and add polygons to remove unconnected stubs.
BuildUnconnectedThermalStubsPolygonList( cornerBufferPolysToSubstract, aPcb, this, s_Correction, s_thermalRot );
/* remove copper areas */
if( cornerBufferPolysToSubstract.size() )
{
KPolygonSet polyset_holes;
AddPolygonCornersToKPolygonList( cornerBufferPolysToSubstract, polyset_holes );
polyset_zone_solid_areas -= polyset_holes;
/* put these areas in m_FilledPolysList */
m_FilledPolysList.clear();
CopyPolygonsFromKPolygonListToFilledPolysList( this, polyset_zone_solid_areas );
if( GetNet() > 0 )
Test_For_Copper_Island_And_Remove_Insulated_Islands( aPcb );
}
}
cornerBufferPolysToSubstract.clear();
}
void AddPolygonCornersToKPolygonList( std::vector <CPolyPt>&
aCornersBuffer,
KPolygonSet& aKPolyList )
{
unsigned ii;
std::vector<KPolyPoint> cornerslist;
int polycount = 0;
for( unsigned ii = 0; ii < aCornersBuffer.size(); ii++ )
{
if( aCornersBuffer[ii].end_contour )
polycount++;
}
aKPolyList.reserve( polycount );
for( unsigned icnt = 0; icnt < aCornersBuffer.size(); )
{
KPolygon poly;
cornerslist.clear();
for( ii = icnt; ii < aCornersBuffer.size(); ii++ )
{
cornerslist.push_back( KPolyPoint( aCornersBuffer[ii].x,
aCornersBuffer[ii].y ) );
if( aCornersBuffer[ii].end_contour )
break;
}
bpl::set_points( poly, cornerslist.begin(), cornerslist.end() );
aKPolyList.push_back( poly );
icnt = ii + 1;
}
}
int CopyPolygonsFromKPolygonListToFilledPolysList( ZONE_CONTAINER*
aZone, KPolygonSet&
aKPolyList )
{
int count = 0;
for( unsigned ii = 0; ii < aKPolyList.size(); ii++ )
{
KPolygon& poly = aKPolyList[ii];
CPolyPt corner( 0, 0, false );
for( unsigned jj = 0; jj < poly.size(); jj++ )
{
KPolyPoint point = *(poly.begin() + jj);
corner.x = point.x();
corner.y = point.y();
corner.end_contour = false;
// Flag this corner if starting a hole connection segment:
// This is used by draw functions to draw only useful segments (and not extra segments)
// corner.utility = (aBoolengine->GetPolygonPointEdgeType() == KB_FALSE_EDGE) ? 1 : 0;
aZone->m_FilledPolysList.push_back( corner );
count++;
}
corner.end_contour = true;
aZone->m_FilledPolysList.pop_back();
aZone->m_FilledPolysList.push_back( corner );
}
return count;
}
int CopyPolygonsFromFilledPolysListTotKPolygonList( ZONE_CONTAINER*
aZone, KPolygonSet&
aKPolyList )
{
unsigned corners_count = aZone->m_FilledPolysList.size();
int count = 0;
unsigned ic = 0;
int polycount = 0;
for( unsigned ii = 0; ii < corners_count; ii++ )
{
CPolyPt* corner = &aZone->m_FilledPolysList[ic];
if( corner->end_contour )
polycount++;
}
aKPolyList.reserve( polycount );
std::vector<KPolyPoint> cornerslist;
while( ic < corners_count )
{
cornerslist.clear();
KPolygon poly;
{
for( ; ic < corners_count; ic++ )
{
CPolyPt* corner = &aZone->m_FilledPolysList[ic];
cornerslist.push_back( KPolyPoint( corner->x, corner->y ) );
count++;
if( corner->end_contour )
{
ic++;
break;
}
}
bpl::set_points( poly, cornerslist.begin(), cornerslist.end() );
aKPolyList.push_back( poly );
}
}
return count;
}
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