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kicad/pcbnew/pad_custom_shape_functions.cpp

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/*
* This program source code file is part of KiCad, a free EDA CAD application.
*
* Copyright (C) 2018 Jean-Pierre Charras, jp.charras at wanadoo.fr
* Copyright (C) 1992-2019 KiCad Developers, see AUTHORS.txt for contributors.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, you may find one here:
* http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
* or you may search the http://www.gnu.org website for the version 2 license,
* or you may write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
/**
* @file class_pad_custom_shape_functions.cpp
* D_PAD functions specific to custom shaped pads.
*/
#include <fctsys.h>
#include <trigo.h>
#include <pcbnew.h>
#include <bezier_curves.h>
#include <class_board.h>
#include <class_board_item.h>
#include <class_drawsegment.h>
#include <class_edge_mod.h>
#include <class_pad.h>
#include <convert_basic_shapes_to_polygon.h>
#include <geometry/convex_hull.h>
#include <geometry/geometry_utils.h>
#include <geometry/shape_rect.h>
/*
* Has meaning only for free shape pads.
* add a free shape to the shape list.
* the shape is a polygon (can be with thick outline), segment, circle or arc
*/
void D_PAD::AddPrimitivePoly( const SHAPE_POLY_SET& aPoly, int aThickness )
{
std::vector<wxPoint> points;
// If aPoly has holes, convert it to a polygon with no holes.
SHAPE_POLY_SET poly_no_hole;
poly_no_hole.Append( aPoly );
poly_no_hole.Fracture( SHAPE_POLY_SET::PM_STRICTLY_SIMPLE );
for( auto iter = poly_no_hole.CIterate(); iter; iter++ )
points.emplace_back( iter->x, iter->y );
AddPrimitivePoly( points, aThickness );
}
void D_PAD::AddPrimitivePoly( const std::vector<wxPoint>& aPoly, int aThickness )
{
DRAWSEGMENT* item = new DRAWSEGMENT();
item->SetShape( S_POLYGON );
item->SetPolyPoints( aPoly );
item->SetWidth( aThickness );
m_editPrimitives.emplace_back( item );
m_shapesDirty = true;
}
void D_PAD::AddPrimitiveSegment( const wxPoint& aStart, const wxPoint& aEnd, int aThickness )
{
DRAWSEGMENT* item = new DRAWSEGMENT();
item->SetStart( aStart );
item->SetEnd( aEnd );
item->SetWidth( aThickness );
m_editPrimitives.emplace_back( item );
m_shapesDirty = true;
}
void D_PAD::AddPrimitiveArc( const wxPoint& aCenter, const wxPoint& aStart, int aArcAngle,
int aThickness )
{
DRAWSEGMENT* item = new DRAWSEGMENT();
item->SetShape( S_ARC );
item->SetCenter( aCenter );
item->SetArcStart( aStart );
item->SetAngle( aArcAngle );
item->SetWidth( aThickness );
m_editPrimitives.emplace_back( item );
m_shapesDirty = true;
}
void D_PAD::AddPrimitiveCurve( const wxPoint& aStart, const wxPoint& aEnd, const wxPoint& aCtrl1,
const wxPoint& aCtrl2, int aThickness )
{
DRAWSEGMENT* item = new DRAWSEGMENT();
item->SetShape( S_CURVE );
item->SetStart( aStart );
item->SetEnd( aEnd );
item->SetBezControl1( aCtrl1 );
item->SetBezControl2( aCtrl2 );
item->SetWidth( aThickness );
m_editPrimitives.emplace_back( item );
m_shapesDirty = true;
}
void D_PAD::AddPrimitiveCircle( const wxPoint& aCenter, int aRadius, int aThickness )
{
DRAWSEGMENT* item = new DRAWSEGMENT();
item->SetShape( S_CIRCLE );
item->SetStart( aCenter );
item->SetEnd( wxPoint( aCenter.x + aRadius, aCenter.y ) );
item->SetWidth( aThickness );
m_editPrimitives.emplace_back( item );
m_shapesDirty = true;
}
void D_PAD::AddPrimitiveRect( const wxPoint& aStart, const wxPoint& aEnd, int aThickness )
{
DRAWSEGMENT* item = new DRAWSEGMENT();
item->SetShape( S_RECT );
item->SetStart( aStart );
item->SetEnd( aEnd );
item->SetWidth( aThickness );
m_editPrimitives.emplace_back( item );
m_shapesDirty = true;
}
void D_PAD::SetPrimitives( const std::vector<std::shared_ptr<DRAWSEGMENT>>& aPrimitivesList )
{
// clear old list
m_editPrimitives.clear();
// Import to the basic shape list
if( aPrimitivesList.size() )
m_editPrimitives = aPrimitivesList;
m_shapesDirty = true;
}
void D_PAD::AddPrimitives( const std::vector<std::shared_ptr<DRAWSEGMENT>>& aPrimitivesList )
{
for( const std::shared_ptr<DRAWSEGMENT>& prim : aPrimitivesList )
m_editPrimitives.push_back( prim );
m_shapesDirty = true;
}
void D_PAD::AddPrimitive( DRAWSEGMENT* aPrimitive )
{
m_editPrimitives.emplace_back( aPrimitive );
m_shapesDirty = true;
}
// clear the basic shapes list and associated data
void D_PAD::DeletePrimitivesList()
{
m_editPrimitives.clear();
m_shapesDirty = true;
}
void D_PAD::addPadPrimitivesToPolygon( SHAPE_POLY_SET* aMergedPolygon, int aError ) const
{
SHAPE_POLY_SET polyset;
for( const std::shared_ptr<DRAWSEGMENT>& primitive : m_editPrimitives )
{
int lineWidth = primitive->GetWidth();
switch( primitive->GetShape() )
{
case S_CURVE:
{
std::vector<wxPoint> ctrlPoints = { primitive->GetStart(), primitive->GetBezControl1(),
primitive->GetBezControl2(), primitive->GetEnd() };
BEZIER_POLY converter( ctrlPoints );
std::vector< wxPoint> poly;
converter.GetPoly( poly, lineWidth );
for( unsigned ii = 1; ii < poly.size(); ii++ )
TransformSegmentToPolygon( polyset, poly[ ii - 1 ], poly[ ii ], aError, lineWidth );
break;
}
case S_SEGMENT: // usual segment : line with rounded ends
{
TransformSegmentToPolygon( polyset, primitive->GetStart(), primitive->GetEnd(),
aError, lineWidth );
break;
}
case S_ARC: // Arc with rounded ends
{
TransformArcToPolygon( polyset, primitive->GetStart(), primitive->GetEnd(),
primitive->GetAngle(), aError, lineWidth );
break;
}
case S_CIRCLE:
{
if( lineWidth ) // Ring
{
TransformRingToPolygon( polyset, primitive->GetStart(), primitive->GetRadius(),
aError, lineWidth );
}
else // Filled circle
{
TransformCircleToPolygon( polyset, primitive->GetStart(), primitive->GetRadius(),
aError );
}
break;
}
case S_RECT:
{
wxPoint corners[4];
corners[0] = primitive->GetStart();
corners[1] = wxPoint( primitive->GetEnd().x, primitive->GetStart().y );
corners[2] = primitive->GetEnd();
corners[3] = wxPoint( primitive->GetStart().x, primitive->GetEnd().y );
if( lineWidth ) // Rect boundary
{
TransformSegmentToPolygon( polyset, corners[0], corners[1], aError, lineWidth );
TransformSegmentToPolygon( polyset, corners[1], corners[2], aError, lineWidth );
TransformSegmentToPolygon( polyset, corners[2], corners[3], aError, lineWidth );
TransformSegmentToPolygon( polyset, corners[3], corners[0], aError, lineWidth );
}
else // Filled rect
{
// Insert the polygon:
polyset.NewOutline();
for( const wxPoint& corner : corners )
polyset.Append( corner );
}
}
break;
case S_POLYGON:
{
SHAPE_POLY_SET poly;
poly.NewOutline();
for( const VECTOR2I& pt : primitive->GetPolyShape().Outline( 0 ).CPoints() )
poly.Append( pt );
if( primitive->GetWidth() > 0 )
{
int numSegs = std::max( GetArcToSegmentCount( lineWidth / 2, aError, 360.0 ), 6 );
poly.Inflate( lineWidth / 2, numSegs );
}
// Insert the polygon:
polyset.NewOutline();
polyset.Append( poly );
}
break;
default:
// un-handled primitive
wxASSERT_MSG( false, "D_PAD::addPadPrimitivesToPolygon not implemented for "
+ BOARD_ITEM::ShowShape( primitive->GetShape() ) );
break;
}
}
polyset.Simplify( SHAPE_POLY_SET::PM_FAST );
// Merge all polygons with the initial pad anchor shape
if( polyset.OutlineCount() )
{
aMergedPolygon->BooleanAdd( polyset, SHAPE_POLY_SET::PM_STRICTLY_SIMPLE );
aMergedPolygon->Fracture( SHAPE_POLY_SET::PM_STRICTLY_SIMPLE );
}
}
void D_PAD::MergePrimitivesAsPolygon( SHAPE_POLY_SET* aMergedPolygon ) const
{
auto board = GetBoard();
int maxError = ARC_HIGH_DEF;
if( board )
maxError = board->GetDesignSettings().m_MaxError;
aMergedPolygon->RemoveAllContours();
// Add the anchor pad shape in aMergedPolygon, others in aux_polyset:
// The anchor pad is always at 0,0
switch( GetAnchorPadShape() )
{
case PAD_SHAPE_RECT:
{
SHAPE_RECT rect( -GetSize().x / 2, -GetSize().y / 2, GetSize().x, GetSize().y );
aMergedPolygon->AddOutline( rect.Outline() );
}
break;
default:
case PAD_SHAPE_CIRCLE:
TransformCircleToPolygon( *aMergedPolygon, wxPoint( 0, 0 ), GetSize().x / 2, maxError );
break;
}
addPadPrimitivesToPolygon( aMergedPolygon, maxError );
}
bool D_PAD::GetBestAnchorPosition( VECTOR2I& aPos )
{
SHAPE_POLY_SET poly;
addPadPrimitivesToPolygon( &poly, ARC_LOW_DEF );
if( poly.OutlineCount() > 1 )
return false;
const int minSteps = 10;
const int maxSteps = 50;
int stepsX, stepsY;
auto bbox = poly.BBox();
if( bbox.GetWidth() < bbox.GetHeight() )
{
stepsX = minSteps;
stepsY = minSteps * (double) bbox.GetHeight() / (double )(bbox.GetWidth() + 1);
}
else
{
stepsY = minSteps;
stepsX = minSteps * (double) bbox.GetWidth() / (double )(bbox.GetHeight() + 1);
}
stepsX = std::max(minSteps, std::min( maxSteps, stepsX ) );
stepsY = std::max(minSteps, std::min( maxSteps, stepsY ) );
VECTOR2I center = bbox.Centre();
int64_t minDist = std::numeric_limits<int64_t>::max();
int64_t minDistEdge;
if( GetAnchorPadShape() == PAD_SHAPE_CIRCLE )
{
minDistEdge = GetSize().x;
}
else
{
minDistEdge = std::max( GetSize().x, GetSize().y );
}
OPT<VECTOR2I> bestAnchor( []()->OPT<VECTOR2I> { return NULLOPT; }() );
for( int y = 0; y < stepsY ; y++ )
{
for( int x = 0; x < stepsX; x++ )
{
VECTOR2I p = bbox.GetPosition();
p.x += rescale( x, bbox.GetWidth(), (stepsX - 1) );
p.y += rescale( y, bbox.GetHeight(), (stepsY - 1) );
if( poly.Contains(p) )
{
int dist = (center - p).EuclideanNorm();
int distEdge = poly.COutline(0).Distance( p, true );
if( distEdge >= minDistEdge )
{
if( dist < minDist )
{
bestAnchor = p;
minDist = dist;
}
}
}
}
}
if( bestAnchor )
{
aPos = *bestAnchor;
return true;
}
return false;
}
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