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/*
* This program source code file is part of KiCad, a free EDA CAD application.
*
* Copyright (C) 2009-2018 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 board_items_to_polygon_shape_transform.cpp
* @brief function to convert shapes of items ( pads, tracks... ) to polygons
*/
/* Function to convert pad and track shapes to polygons
* Used to fill zones areas and in 3D viewer
*/
#include <vector>
#include <fctsys.h>
#include <bezier_curves.h>
#include <base_units.h> // for IU_PER_MM
#include <gr_text.h>
#include <pcbnew.h>
#include <pcb_edit_frame.h>
#include <trigo.h>
#include <class_board.h>
#include <class_pad.h>
#include <class_track.h>
#include <class_drawsegment.h>
#include <class_pcb_text.h>
#include <class_zone.h>
#include <class_module.h>
#include <class_edge_mod.h>
#include <convert_basic_shapes_to_polygon.h>
#include <geometry/geometry_utils.h>
// A helper struct for the callback function
// These variables are parameters used in addTextSegmToPoly.
// But addTextSegmToPoly is a call-back function,
// so we cannot send them as arguments.
struct TSEGM_2_POLY_PRMS {
int m_textWidth;
int m_error;
SHAPE_POLY_SET* m_cornerBuffer;
};
TSEGM_2_POLY_PRMS prms;
// This is a call back function, used by GRText to draw the 3D text shape:
static void addTextSegmToPoly( int x0, int y0, int xf, int yf, void* aData )
{
TSEGM_2_POLY_PRMS* prm = static_cast<TSEGM_2_POLY_PRMS*>( aData );
TransformRoundedEndsSegmentToPolygon( *prm->m_cornerBuffer,
wxPoint( x0, y0), wxPoint( xf, yf ),
prm->m_error, prm->m_textWidth );
}
void BOARD::ConvertBrdLayerToPolygonalContours( PCB_LAYER_ID aLayer, SHAPE_POLY_SET& aOutlines )
{
// convert tracks and vias:
for( auto track : m_tracks )
{
if( !track->IsOnLayer( aLayer ) )
continue;
track->TransformShapeWithClearanceToPolygon( aOutlines, 0 );
}
// convert pads
for( auto module : m_modules )
{
module->TransformPadsShapesWithClearanceToPolygon( aLayer, aOutlines, 0 );
// Micro-wave modules may have items on copper layers
module->TransformGraphicShapesWithClearanceToPolygonSet( aLayer, aOutlines, 0 );
}
// convert copper zones
for( int ii = 0; ii < GetAreaCount(); ii++ )
{
ZONE_CONTAINER* zone = GetArea( ii );
PCB_LAYER_ID zonelayer = zone->GetLayer();
if( zonelayer == aLayer )
zone->TransformSolidAreasShapesToPolygonSet( aOutlines );
}
// convert graphic items on copper layers (texts)
for( auto item : m_drawings )
{
if( !item->IsOnLayer( aLayer ) )
continue;
switch( item->Type() )
{
case PCB_LINE_T:
( (DRAWSEGMENT*) item )->TransformShapeWithClearanceToPolygon( aOutlines, 0 );
break;
case PCB_TEXT_T:
( (TEXTE_PCB*) item )->TransformShapeWithClearanceToPolygonSet( aOutlines, 0 );
break;
default:
break;
}
}
}
void MODULE::TransformPadsShapesWithClearanceToPolygon( PCB_LAYER_ID aLayer,
SHAPE_POLY_SET& aCornerBuffer, int aInflateValue, int aMaxError,
bool aSkipNPTHPadsWihNoCopper ) const
{
wxSize margin;
for( auto pad : m_pads )
{
if( aLayer != UNDEFINED_LAYER && !pad->IsOnLayer(aLayer) )
continue;
// NPTH pads are not drawn on layers if the shape size and pos is the same
// as their hole:
if( aSkipNPTHPadsWihNoCopper && pad->GetAttribute() == PAD_ATTRIB_HOLE_NOT_PLATED )
{
if( pad->GetDrillSize() == pad->GetSize() && pad->GetOffset() == wxPoint( 0, 0 ) )
{
switch( pad->GetShape() )
{
case PAD_SHAPE_CIRCLE:
if( pad->GetDrillShape() == PAD_DRILL_SHAPE_CIRCLE )
continue;
break;
case PAD_SHAPE_OVAL:
if( pad->GetDrillShape() != PAD_DRILL_SHAPE_CIRCLE )
continue;
break;
default:
break;
}
}
}
switch( aLayer )
{
case F_Mask:
case B_Mask:
margin.x = margin.y = pad->GetSolderMaskMargin() + aInflateValue;
break;
case F_Paste:
case B_Paste:
margin = pad->GetSolderPasteMargin();
margin.x += aInflateValue;
margin.y += aInflateValue;
break;
default:
margin.x = margin.y = aInflateValue;
break;
}
pad->BuildPadShapePolygon( aCornerBuffer, margin );
}
}
/* generate shapes of graphic items (outlines) on layer aLayer as polygons,
* and adds these polygons to aCornerBuffer
* aCornerBuffer = the buffer to store polygons
* aInflateValue = a value to inflate shapes
* aCircleToSegmentsCount = number of segments to approximate a circle
* aCorrectionFactor = the correction to apply to the circle radius
* to generate the polygon.
* if aCorrectionFactor = 1.0, the polygon is inside the circle
* the radius of circle approximated by segments is
* initial radius * aCorrectionFactor
*/
void MODULE::TransformGraphicShapesWithClearanceToPolygonSet( PCB_LAYER_ID aLayer,
SHAPE_POLY_SET& aCornerBuffer, int aInflateValue, int aError, bool aIncludeText ) const
{
std::vector<TEXTE_MODULE *> texts; // List of TEXTE_MODULE to convert
EDGE_MODULE* outline;
for( auto item : GraphicalItems() )
{
switch( item->Type() )
{
case PCB_MODULE_TEXT_T:
{
TEXTE_MODULE* text = static_cast<TEXTE_MODULE*>( item );
if( ( aLayer != UNDEFINED_LAYER && text->GetLayer() == aLayer ) && text->IsVisible() )
texts.push_back( text );
break;
}
case PCB_MODULE_EDGE_T:
outline = (EDGE_MODULE*) item;
if( aLayer != UNDEFINED_LAYER && outline->GetLayer() != aLayer )
break;
outline->TransformShapeWithClearanceToPolygon( aCornerBuffer, 0, aError );
break;
default:
break;
}
}
if( !aIncludeText )
return;
// Convert texts sur modules
if( Reference().GetLayer() == aLayer && Reference().IsVisible() )
texts.push_back( &Reference() );
if( Value().GetLayer() == aLayer && Value().IsVisible() )
texts.push_back( &Value() );
prms.m_cornerBuffer = &aCornerBuffer;
for( unsigned ii = 0; ii < texts.size(); ii++ )
{
TEXTE_MODULE *textmod = texts[ii];
prms.m_textWidth = textmod->GetThickness() + ( 2 * aInflateValue );
prms.m_error = aError;
wxSize size = textmod->GetTextSize();
if( textmod->IsMirrored() )
size.x = -size.x;
GRText( NULL, textmod->GetTextPos(), BLACK, textmod->GetShownText(),
textmod->GetDrawRotation(), size, textmod->GetHorizJustify(),
textmod->GetVertJustify(), textmod->GetThickness(), textmod->IsItalic(),
true, addTextSegmToPoly, &prms );
}
}
// Same as function TransformGraphicShapesWithClearanceToPolygonSet but
// this only render text
void MODULE::TransformGraphicTextWithClearanceToPolygonSet(
PCB_LAYER_ID aLayer, SHAPE_POLY_SET& aCornerBuffer, int aInflateValue, int aError ) const
{
std::vector<TEXTE_MODULE *> texts; // List of TEXTE_MODULE to convert
for( auto item : GraphicalItems() )
{
switch( item->Type() )
{
case PCB_MODULE_TEXT_T:
{
TEXTE_MODULE* text = static_cast<TEXTE_MODULE*>( item );
if( text->GetLayer() == aLayer && text->IsVisible() )
texts.push_back( text );
break;
}
case PCB_MODULE_EDGE_T:
// This function does not render this
break;
default:
break;
}
}
// Convert texts sur modules
if( Reference().GetLayer() == aLayer && Reference().IsVisible() )
texts.push_back( &Reference() );
if( Value().GetLayer() == aLayer && Value().IsVisible() )
texts.push_back( &Value() );
prms.m_cornerBuffer = &aCornerBuffer;
for( unsigned ii = 0; ii < texts.size(); ii++ )
{
TEXTE_MODULE *textmod = texts[ii];
prms.m_textWidth = textmod->GetThickness() + ( 2 * aInflateValue );
prms.m_error = aError;
wxSize size = textmod->GetTextSize();
if( textmod->IsMirrored() )
size.x = -size.x;
GRText( NULL, textmod->GetTextPos(), BLACK, textmod->GetShownText(),
textmod->GetDrawRotation(), size, textmod->GetHorizJustify(),
textmod->GetVertJustify(), textmod->GetThickness(), textmod->IsItalic(),
true, addTextSegmToPoly, &prms );
}
}
void ZONE_CONTAINER::TransformSolidAreasShapesToPolygonSet(
SHAPE_POLY_SET& aCornerBuffer, int aError ) const
{
if( GetFilledPolysList().IsEmpty() )
return;
// add filled areas polygons
aCornerBuffer.Append( m_FilledPolysList );
auto board = GetBoard();
int maxError = ARC_HIGH_DEF;
if( board )
maxError = board->GetDesignSettings().m_MaxError;
// add filled areas outlines, which are drawn with thick lines
for( int i = 0; i < m_FilledPolysList.OutlineCount(); i++ )
{
const SHAPE_LINE_CHAIN& path = m_FilledPolysList.COutline( i );
for( int j = 0; j < path.PointCount(); j++ )
{
const VECTOR2I& a = path.CPoint( j );
const VECTOR2I& b = path.CPoint( j + 1 );
TransformRoundedEndsSegmentToPolygon( aCornerBuffer, wxPoint( a.x, a.y ),
wxPoint( b.x, b.y ), maxError, GetMinThickness() );
}
}
}
void EDA_TEXT::TransformBoundingBoxWithClearanceToPolygon(
SHAPE_POLY_SET* aCornerBuffer, int aClearanceValue ) const
{
if( GetText().Length() == 0 )
return;
wxPoint corners[4]; // Buffer of polygon corners
EDA_RECT rect = GetTextBox( -1 );
rect.Inflate( aClearanceValue );
corners[0].x = rect.GetOrigin().x;
corners[0].y = rect.GetOrigin().y;
corners[1].y = corners[0].y;
corners[1].x = rect.GetRight();
corners[2].x = corners[1].x;
corners[2].y = rect.GetBottom();
corners[3].y = corners[2].y;
corners[3].x = corners[0].x;
aCornerBuffer->NewOutline();
for( int ii = 0; ii < 4; ii++ )
{
// Rotate polygon
RotatePoint( &corners[ii].x, &corners[ii].y, GetTextPos().x, GetTextPos().y, GetTextAngle() );
aCornerBuffer->Append( corners[ii].x, corners[ii].y );
}
}
/* Function TransformShapeWithClearanceToPolygonSet
* Convert the text shape to a set of polygons (one by segment)
* Used in filling zones calculations and 3D view
* Circles and arcs are approximated by segments
* aCornerBuffer = SHAPE_POLY_SET to store the polygon corners
* aClearanceValue = the clearance around the text
* aCircleToSegmentsCount = the number of segments to approximate a circle
* aCorrectionFactor = the correction to apply to circles radius to keep
* clearance when the circle is approximated by segment bigger or equal
* to the real clearance value (usually near from 1.0)
*/
void TEXTE_PCB::TransformShapeWithClearanceToPolygonSet(
SHAPE_POLY_SET& aCornerBuffer, int aClearanceValue, int aError ) const
{
wxSize size = GetTextSize();
if( IsMirrored() )
size.x = -size.x;
prms.m_cornerBuffer = &aCornerBuffer;
prms.m_textWidth = GetThickness() + ( 2 * aClearanceValue );
prms.m_error = aError;
COLOR4D color = COLOR4D::BLACK; // not actually used, but needed by GRText
if( IsMultilineAllowed() )
{
wxArrayString strings_list;
wxStringSplit( GetShownText(), strings_list, '\n' );
std::vector<wxPoint> positions;
positions.reserve( strings_list.Count() );
GetPositionsOfLinesOfMultilineText( positions, strings_list.Count() );
for( unsigned ii = 0; ii < strings_list.Count(); ii++ )
{
wxString txt = strings_list.Item( ii );
GRText( NULL, positions[ii], color, txt, GetTextAngle(), size, GetHorizJustify(),
GetVertJustify(), GetThickness(), IsItalic(), true, addTextSegmToPoly, &prms );
}
}
else
{
GRText( NULL, GetTextPos(), color, GetShownText(), GetTextAngle(), size, GetHorizJustify(),
GetVertJustify(), GetThickness(), IsItalic(), true, addTextSegmToPoly, &prms );
}
}
void DRAWSEGMENT::TransformShapeWithClearanceToPolygon(
SHAPE_POLY_SET& aCornerBuffer, int aClearanceValue, int aError, bool ignoreLineWidth ) const
{
// The full width of the lines to create:
int linewidth = ignoreLineWidth ? 0 : m_Width;
linewidth += 2 * aClearanceValue;
// Creating a reliable clearance shape for circles and arcs is not so easy, due to
// the error created by segment approximation.
// for a circle this is not so hard: create a polygon from a circle slightly bigger:
// thickness = linewidth + s_error_max, and radius = initial radius + s_error_max/2
// giving a shape with a suitable internal radius and external radius
// For an arc this is more tricky: TODO
switch( m_Shape )
{
case S_CIRCLE:
TransformRingToPolygon(
aCornerBuffer, GetCenter(), GetRadius(), aError, linewidth );
break;
case S_ARC:
TransformArcToPolygon(
aCornerBuffer, GetCenter(), GetArcStart(), m_Angle, aError, linewidth );
break;
case S_SEGMENT:
TransformOvalClearanceToPolygon(
aCornerBuffer, m_Start, m_End, linewidth, aError );
break;
case S_POLYGON:
if( IsPolyShapeValid() )
{
// The polygon is expected to be a simple polygon
// not self intersecting, no hole.
MODULE* module = GetParentModule(); // NULL for items not in footprints
double orientation = module ? module->GetOrientation() : 0.0;
wxPoint offset;
if( module )
offset = module->GetPosition();
// Build the polygon with the actual position and orientation:
std::vector< wxPoint> poly;
poly = BuildPolyPointsList();
for( unsigned ii = 0; ii < poly.size(); ii++ )
{
RotatePoint( &poly[ii], orientation );
poly[ii] += offset;
}
// If the polygon is not filled, treat it as a closed set of lines
if( !IsPolygonFilled() )
{
for( size_t ii = 1; ii < poly.size(); ii++ )
{
TransformOvalClearanceToPolygon( aCornerBuffer, poly[ii - 1], poly[ii],
linewidth, aError );
}
TransformOvalClearanceToPolygon( aCornerBuffer, poly.back(), poly.front(),
linewidth, aError );
break;
}
// Generate polygons for the outline + clearance
// This code is compatible with a polygon with holes linked to external outline
// by overlapping segments.
// Insert the initial polygon:
aCornerBuffer.NewOutline();
for( unsigned ii = 0; ii < poly.size(); ii++ )
aCornerBuffer.Append( poly[ii].x, poly[ii].y );
if( linewidth ) // Add thick outlines
{
wxPoint corner1( poly[poly.size()-1] );
for( unsigned ii = 0; ii < poly.size(); ii++ )
{
wxPoint corner2( poly[ii] );
if( corner2 != corner1 )
{
TransformRoundedEndsSegmentToPolygon(
aCornerBuffer, corner1, corner2, aError, linewidth );
}
corner1 = corner2;
}
}
}
break;
case S_CURVE: // Bezier curve
{
std::vector<wxPoint> ctrlPoints = { m_Start, m_BezierC1, m_BezierC2, m_End };
BEZIER_POLY converter( ctrlPoints );
std::vector< wxPoint> poly;
converter.GetPoly( poly, m_Width );
for( unsigned ii = 1; ii < poly.size(); ii++ )
{
TransformRoundedEndsSegmentToPolygon(
aCornerBuffer, poly[ii - 1], poly[ii], aError, linewidth );
}
}
break;
default:
break;
}
}
void TRACK::TransformShapeWithClearanceToPolygon(
SHAPE_POLY_SET& aCornerBuffer, int aClearanceValue, int aError, bool ignoreLineWidth ) const
{
wxASSERT_MSG( !ignoreLineWidth, "IgnoreLineWidth has no meaning for tracks." );
int radius = ( m_Width / 2 ) + aClearanceValue;
switch( Type() )
{
case PCB_VIA_T:
{
TransformCircleToPolygon( aCornerBuffer, m_Start, radius, aError );
}
break;
default:
TransformOvalClearanceToPolygon( aCornerBuffer, m_Start, m_End,
m_Width + ( 2 * aClearanceValue ), aError );
break;
}
}
void D_PAD::TransformShapeWithClearanceToPolygon(
SHAPE_POLY_SET& aCornerBuffer, int aClearanceValue, int aError, bool ignoreLineWidth ) const
{
wxASSERT_MSG( !ignoreLineWidth, "IgnoreLineWidth has no meaning for pads." );
double angle = m_Orient;
int dx = (m_Size.x / 2) + aClearanceValue;
int dy = (m_Size.y / 2) + aClearanceValue;
wxPoint padShapePos = ShapePos(); /* Note: for pad having a shape offset,
* the pad position is NOT the shape position */
switch( GetShape() )
{
case PAD_SHAPE_CIRCLE:
{
TransformCircleToPolygon( aCornerBuffer, padShapePos, dx, aError );
}
break;
case PAD_SHAPE_OVAL:
// An oval pad has the same shape as a segment with rounded ends
{
int width;
wxPoint shape_offset;
if( dy > dx ) // Oval pad X/Y ratio for choosing translation axis
{
shape_offset.y = dy - dx;
width = dx * 2;
}
else //if( dy <= dx )
{
shape_offset.x = dy - dx;
width = dy * 2;
}
RotatePoint( &shape_offset, angle );
wxPoint start = padShapePos - shape_offset;
wxPoint end = padShapePos + shape_offset;
TransformOvalClearanceToPolygon( aCornerBuffer, start, end, width, aError );
}
break;
case PAD_SHAPE_TRAPEZOID:
case PAD_SHAPE_RECT:
{
wxPoint corners[4];
BuildPadPolygon( corners, wxSize( 0, 0 ), angle );
SHAPE_POLY_SET outline;
outline.NewOutline();
for( int ii = 0; ii < 4; ii++ )
{
corners[ii] += padShapePos;
outline.Append( corners[ii].x, corners[ii].y );
}
int numSegs = std::max( GetArcToSegmentCount( aClearanceValue, aError, 360.0 ), 6 );
double correction = GetCircletoPolyCorrectionFactor( numSegs );
int rounding_radius = KiROUND( aClearanceValue * correction );
outline.Inflate( rounding_radius, numSegs );
aCornerBuffer.Append( outline );
}
break;
case PAD_SHAPE_CHAMFERED_RECT:
case PAD_SHAPE_ROUNDRECT:
{
SHAPE_POLY_SET outline;
int radius = GetRoundRectCornerRadius() + aClearanceValue;
int numSegs = std::max( GetArcToSegmentCount( radius, aError, 360.0 ), 6 );
double correction = GetCircletoPolyCorrectionFactor( numSegs );
int clearance = KiROUND( aClearanceValue * correction );
int rounding_radius = GetRoundRectCornerRadius() + clearance;
wxSize shapesize( m_Size );
shapesize.x += clearance * 2;
shapesize.y += clearance * 2;
bool doChamfer = GetShape() == PAD_SHAPE_CHAMFERED_RECT;
TransformRoundChamferedRectToPolygon( outline, padShapePos, shapesize, angle,
rounding_radius, doChamfer ? GetChamferRectRatio() : 0.0,
doChamfer ? GetChamferPositions() : 0, aError );
aCornerBuffer.Append( outline );
}
break;
case PAD_SHAPE_CUSTOM:
{
int numSegs = std::max( GetArcToSegmentCount( aClearanceValue, aError, 360.0 ), 6 );
double correction = GetCircletoPolyCorrectionFactor( numSegs );
int clearance = KiROUND( aClearanceValue * correction );
SHAPE_POLY_SET outline; // Will contain the corners in board coordinates
outline.Append( m_customShapeAsPolygon );
CustomShapeAsPolygonToBoardPosition( &outline, GetPosition(), GetOrientation() );
outline.Simplify( SHAPE_POLY_SET::PM_FAST );
outline.Inflate( clearance, numSegs );
outline.Fracture( SHAPE_POLY_SET::PM_FAST );
aCornerBuffer.Append( outline );
}
break;
}
}
/*
* Function BuildPadShapePolygon
* Build the Corner list of the polygonal shape,
* depending on shape, extra size (clearance ...) pad and orientation
* Note: for Round and oval pads this function is equivalent to
* TransformShapeWithClearanceToPolygon, but not for other shapes
*/
void D_PAD::BuildPadShapePolygon(
SHAPE_POLY_SET& aCornerBuffer, wxSize aInflateValue, int aError ) const
{
wxPoint corners[4];
wxPoint padShapePos = ShapePos(); /* Note: for pad having a shape offset,
* the pad position is NOT the shape position */
switch( GetShape() )
{
case PAD_SHAPE_CIRCLE:
case PAD_SHAPE_OVAL:
case PAD_SHAPE_ROUNDRECT:
case PAD_SHAPE_CHAMFERED_RECT:
{
// We are using TransformShapeWithClearanceToPolygon to build the shape.
// Currently, this method uses only the same inflate value for X and Y dirs.
// so because here this is not the case, we use a inflated dummy pad to build
// the polygonal shape
// TODO: remove this dummy pad when TransformShapeWithClearanceToPolygon will use
// a wxSize to inflate the pad size
D_PAD dummy( *this );
dummy.SetSize( GetSize() + aInflateValue + aInflateValue );
dummy.TransformShapeWithClearanceToPolygon( aCornerBuffer, 0 );
}
break;
case PAD_SHAPE_TRAPEZOID:
case PAD_SHAPE_RECT:
aCornerBuffer.NewOutline();
BuildPadPolygon( corners, aInflateValue, m_Orient );
for( int ii = 0; ii < 4; ii++ )
{
corners[ii] += padShapePos; // Shift origin to position
aCornerBuffer.Append( corners[ii].x, corners[ii].y );
}
break;
case PAD_SHAPE_CUSTOM:
// for a custom shape, that is in fact a polygon (with holes), we can use only a inflate value.
// so use ( aInflateValue.x + aInflateValue.y ) / 2 as polygon inflate value.
// (different values for aInflateValue.x and aInflateValue.y has no sense for a custom pad)
TransformShapeWithClearanceToPolygon(
aCornerBuffer, ( aInflateValue.x + aInflateValue.y ) / 2 );
break;
}
}
bool D_PAD::BuildPadDrillShapePolygon(
SHAPE_POLY_SET& aCornerBuffer, int aInflateValue, int aError ) const
{
wxSize drillsize = GetDrillSize();
if( !drillsize.x || !drillsize.y )
return false;
if( drillsize.x == drillsize.y ) // usual round hole
{
int radius = ( drillsize.x / 2 ) + aInflateValue;
TransformCircleToPolygon( aCornerBuffer, GetPosition(), radius, aError );
}
else // Oblong hole
{
wxPoint start, end;
int width;
GetOblongDrillGeometry( start, end, width );
width += aInflateValue * 2;
TransformRoundedEndsSegmentToPolygon(
aCornerBuffer, GetPosition() + start, GetPosition() + end, aError, width );
}
return true;
}
/**
* Function CreateThermalReliefPadPolygon
* Add holes around a pad to create a thermal relief
* copper thickness is min (dx/2, aCopperWitdh) or min (dy/2, aCopperWitdh)
* @param aCornerBuffer = a buffer to store the polygon
* @param aPad = the current pad used to create the thermal shape
* @param aThermalGap = gap in thermal shape
* @param aCopperThickness = stubs thickness in thermal shape
* @param aMinThicknessValue = min copper thickness allowed
* @param aError = maximum error allowed when approximating arcs
* @param aThermalRot = for rond pads the rotation of thermal stubs (450 usually for 45 deg.)
*/
/* thermal reliefs are created as 4 polygons.
* each corner of a polygon if calculated for a pad at position 0, 0, orient 0,
* and then moved and rotated acroding to the pad position and orientation
*/
/*
* Note 1: polygons are drawm using outlines witk a thickness = aMinThicknessValue
* so shapes must take in account this outline thickness
*
* Note 2:
* Trapezoidal pads are not considered here because they are very special case
* and are used in microwave applications and they *DO NOT* have a thermal relief that
* change the shape by creating stubs and destroy their properties.
*/
void CreateThermalReliefPadPolygon( SHAPE_POLY_SET& aCornerBuffer,
const D_PAD& aPad,
int aThermalGap,
int aCopperThickness,
int aMinThicknessValue,
int aError,
double aThermalRot )
{
wxPoint corner, corner_end;
wxSize copper_thickness;
wxPoint padShapePos = aPad.ShapePos(); // Note: for pad having a shape offset,
// the pad position is NOT the shape position
/* Keep in account the polygon outline thickness
* aThermalGap must be increased by aMinThicknessValue/2 because drawing external outline
* with a thickness of aMinThicknessValue will reduce gap by aMinThicknessValue/2
*/
aThermalGap += aMinThicknessValue / 2;
/* Keep in account the polygon outline thickness
* copper_thickness must be decreased by aMinThicknessValue because drawing outlines
* with a thickness of aMinThicknessValue will increase real thickness by aMinThicknessValue
*/
int dx = aPad.GetSize().x / 2;
int dy = aPad.GetSize().y / 2;
copper_thickness.x = std::min( aPad.GetSize().x, aCopperThickness ) - aMinThicknessValue;
copper_thickness.y = std::min( aPad.GetSize().y, aCopperThickness ) - aMinThicknessValue;
if( copper_thickness.x < 0 )
copper_thickness.x = 0;
if( copper_thickness.y < 0 )
copper_thickness.y = 0;
switch( aPad.GetShape() )
{
case PAD_SHAPE_CIRCLE: // Add 4 similar holes
{
/* we create 4 copper holes and put them in position 1, 2, 3 and 4
* here is the area of the rectangular pad + its thermal gap
* the 4 copper holes remove the copper in order to create the thermal gap
* 4 ------ 1
* | |
* | |
* | |
* | |
* 3 ------ 2
* holes 2, 3, 4 are the same as hole 1, rotated 90, 180, 270 deg
*/
// Build the hole pattern, for the hole in the X >0, Y > 0 plane:
// The pattern roughtly is a 90 deg arc pie
std::vector <wxPoint> corners_buffer;
int numSegs = std::max( GetArcToSegmentCount( dx + aThermalGap, aError, 360.0 ), 6 );
double correction = GetCircletoPolyCorrectionFactor( numSegs );
double delta = 3600.0 / numSegs;
// Radius of outer arcs of the shape corrected for arc approximation by lines
int outer_radius = KiROUND( ( dx + aThermalGap ) * correction );
// Crosspoint of thermal spoke sides, the first point of polygon buffer
corners_buffer.push_back( wxPoint( copper_thickness.x / 2, copper_thickness.y / 2 ) );
// Add an intermediate point on spoke sides, to allow a > 90 deg angle between side
// and first seg of arc approx
corner.x = copper_thickness.x / 2;
int y = outer_radius - (aThermalGap / 4);
corner.y = KiROUND( sqrt( ( (double) y * y - (double) corner.x * corner.x ) ) );
if( aThermalRot != 0 )
corners_buffer.push_back( corner );
// calculate the starting point of the outter arc
corner.x = copper_thickness.x / 2;
corner.y = KiROUND( sqrt( ( (double) outer_radius * outer_radius ) -
( (double) corner.x * corner.x ) ) );
RotatePoint( &corner, 90 ); // 9 degrees is the spoke fillet size
// calculate the ending point of the outer arc
corner_end.x = corner.y;
corner_end.y = corner.x;
// calculate intermediate points (y coordinate from corner.y to corner_end.y
while( (corner.y > corner_end.y) && (corner.x < corner_end.x) )
{
corners_buffer.push_back( corner );
RotatePoint( &corner, delta );
}
corners_buffer.push_back( corner_end );
/* add an intermediate point, to avoid angles < 90 deg between last arc approx line
* and radius line
*/
corner.x = corners_buffer[1].y;
corner.y = corners_buffer[1].x;
corners_buffer.push_back( corner );
// Now, add the 4 holes ( each is the pattern, rotated by 0, 90, 180 and 270 deg
// aThermalRot = 450 (45.0 degrees orientation) work fine.
double angle_pad = aPad.GetOrientation(); // Pad orientation
double th_angle = aThermalRot;
for( unsigned ihole = 0; ihole < 4; ihole++ )
{
aCornerBuffer.NewOutline();
for( unsigned ii = 0; ii < corners_buffer.size(); ii++ )
{
corner = corners_buffer[ii];
RotatePoint( &corner, th_angle + angle_pad ); // Rotate by segment angle and pad orientation
corner += padShapePos;
aCornerBuffer.Append( corner.x, corner.y );
}
th_angle += 900; // Note: th_angle in in 0.1 deg.
}
}
break;
case PAD_SHAPE_OVAL:
{
// Oval pad support along the lines of round and rectangular pads
std::vector <wxPoint> corners_buffer; // Polygon buffer as vector
dx = (aPad.GetSize().x / 2) + aThermalGap; // Cutout radius x
dy = (aPad.GetSize().y / 2) + aThermalGap; // Cutout radius y
wxPoint shape_offset;
// We want to calculate an oval shape with dx > dy.
// if this is not the case, exchange dx and dy, and rotate the shape 90 deg.
int supp_angle = 0;
if( dx < dy )
{
std::swap( dx, dy );
supp_angle = 900;
std::swap( copper_thickness.x, copper_thickness.y );
}
int deltasize = dx - dy; // = distance between shape position and the 2 demi-circle ends centre
// here we have dx > dy
// Radius of outer arcs of the shape:
int outer_radius = dy; // The radius of the outer arc is radius end + aThermalGap
int numSegs = std::max( GetArcToSegmentCount( outer_radius, aError, 360.0 ), 6 );
double delta = 3600.0 / numSegs;
// Some coordinate fiddling, depending on the shape offset direction
shape_offset = wxPoint( deltasize, 0 );
// Crosspoint of thermal spoke sides, the first point of polygon buffer
corner.x = copper_thickness.x / 2;
corner.y = copper_thickness.y / 2;
corners_buffer.push_back( corner );
// Arc start point calculation, the intersecting point of cutout arc and thermal spoke edge
// If copper thickness is more than shape offset, we need to calculate arc intercept point.
if( copper_thickness.x > deltasize )
{
corner.x = copper_thickness.x / 2;
corner.y = KiROUND( sqrt( ( (double) outer_radius * outer_radius ) -
( (double) ( corner.x - delta ) * ( corner.x - deltasize ) ) ) );
corner.x -= deltasize;
/* creates an intermediate point, to have a > 90 deg angle
* between the side and the first segment of arc approximation
*/
wxPoint intpoint = corner;
intpoint.y -= aThermalGap / 4;
corners_buffer.push_back( intpoint + shape_offset );
RotatePoint( &corner, 90 ); // 9 degrees of thermal fillet
}
else
{
corner.x = copper_thickness.x / 2;
corner.y = outer_radius;
corners_buffer.push_back( corner );
}
// Add an intermediate point on spoke sides, to allow a > 90 deg angle between side
// and first seg of arc approx
wxPoint last_corner;
last_corner.y = copper_thickness.y / 2;
int px = outer_radius - (aThermalGap / 4);
last_corner.x =
KiROUND( sqrt( ( ( (double) px * px ) - (double) last_corner.y * last_corner.y ) ) );
// Arc stop point calculation, the intersecting point of cutout arc and thermal spoke edge
corner_end.y = copper_thickness.y / 2;
corner_end.x =
KiROUND( sqrt( ( (double) outer_radius *
outer_radius ) - ( (double) corner_end.y * corner_end.y ) ) );
RotatePoint( &corner_end, -90 ); // 9 degrees of thermal fillet
// calculate intermediate arc points till limit is reached
while( (corner.y > corner_end.y) && (corner.x < corner_end.x) )
{
corners_buffer.push_back( corner + shape_offset );
RotatePoint( &corner, delta );
}
//corners_buffer.push_back(corner + shape_offset); // TODO: about one mil geometry error forms somewhere.
corners_buffer.push_back( corner_end + shape_offset );
corners_buffer.push_back( last_corner + shape_offset ); // Enabling the line above shows intersection point.
/* Create 2 holes, rotated by pad rotation.
*/
double angle = aPad.GetOrientation() + supp_angle;
for( int irect = 0; irect < 2; irect++ )
{
aCornerBuffer.NewOutline();
for( unsigned ic = 0; ic < corners_buffer.size(); ic++ )
{
wxPoint cpos = corners_buffer[ic];
RotatePoint( &cpos, angle );
cpos += padShapePos;
aCornerBuffer.Append( cpos.x, cpos.y );
}
angle = AddAngles( angle, 1800 ); // this is calculate hole 3
}
// Create holes, that are the mirrored from the previous holes
for( unsigned ic = 0; ic < corners_buffer.size(); ic++ )
{
wxPoint swap = corners_buffer[ic];
swap.x = -swap.x;
corners_buffer[ic] = swap;
}
// Now add corner 4 and 2 (2 is the corner 4 rotated by 180 deg
angle = aPad.GetOrientation() + supp_angle;
for( int irect = 0; irect < 2; irect++ )
{
aCornerBuffer.NewOutline();
for( unsigned ic = 0; ic < corners_buffer.size(); ic++ )
{
wxPoint cpos = corners_buffer[ic];
RotatePoint( &cpos, angle );
cpos += padShapePos;
aCornerBuffer.Append( cpos.x, cpos.y );
}
angle = AddAngles( angle, 1800 );
}
}
break;
case PAD_SHAPE_CHAMFERED_RECT:
case PAD_SHAPE_ROUNDRECT: // thermal shape is the same for rectangular shapes.
case PAD_SHAPE_RECT:
{
/* we create 4 copper holes and put them in position 1, 2, 3 and 4
* here is the area of the rectangular pad + its thermal gap
* the 4 copper holes remove the copper in order to create the thermal gap
* 1 ------ 4
* | |
* | |
* | |
* | |
* 2 ------ 3
* hole 3 is the same as hole 1, rotated 180 deg
* hole 4 is the same as hole 2, rotated 180 deg and is the same as hole 1, mirrored
*/
// First, create a rectangular hole for position 1 :
// 2 ------- 3
// | |
// | |
// | |
// 1 -------4
// Modified rectangles with one corner rounded. TODO: merging with oval thermals
// and possibly round too.
std::vector <wxPoint> corners_buffer; // Polygon buffer as vector
dx = (aPad.GetSize().x / 2) + aThermalGap; // Cutout radius x
dy = (aPad.GetSize().y / 2) + aThermalGap; // Cutout radius y
// calculation is optimized for pad shape with dy >= dx (vertical rectangle).
// if it is not the case, just rotate this shape 90 degrees:
double angle = aPad.GetOrientation();
wxPoint corner_origin_pos( -aPad.GetSize().x / 2, -aPad.GetSize().y / 2 );
if( dy < dx )
{
std::swap( dx, dy );
std::swap( copper_thickness.x, copper_thickness.y );
std::swap( corner_origin_pos.x, corner_origin_pos.y );
angle += 900.0;
}
// Now calculate the hole pattern in position 1 ( top left pad corner )
// The first point of polygon buffer is left lower corner, second the crosspoint of
// thermal spoke sides, the third is upper right corner and the rest are rounding
// vertices going anticlockwise. Note the inverted Y-axis in corners_buffer y coordinates.
wxPoint arc_end_point( -dx, -(aThermalGap / 4 + copper_thickness.y / 2) );
corners_buffer.push_back( arc_end_point ); // Adds small miters to zone
corners_buffer.push_back( wxPoint( -(dx - aThermalGap / 4), -copper_thickness.y / 2 ) ); // fill and spoke corner
corners_buffer.push_back( wxPoint( -copper_thickness.x / 2, -copper_thickness.y / 2 ) );
corners_buffer.push_back( wxPoint( -copper_thickness.x / 2, -(dy - aThermalGap / 4) ) );
// The first point to build the rounded corner:
wxPoint arc_start_point( -(aThermalGap / 4 + copper_thickness.x / 2) , -dy );
corners_buffer.push_back( arc_start_point );
int numSegs = std::max( GetArcToSegmentCount( aThermalGap, aError, 360.0 ), 6 );
double correction = GetCircletoPolyCorrectionFactor( numSegs );
int rounding_radius = KiROUND( aThermalGap * correction ); // Corner rounding radius
// Calculate arc angle parameters.
// the start angle id near 900 decidegrees, the final angle is near 1800.0 decidegrees.
double arc_increment = 3600.0 / numSegs;
// the arc_angle_start is 900.0 or slighly more, depending on the actual arc starting point
double arc_angle_start = atan2( -arc_start_point.y -corner_origin_pos.y, arc_start_point.x - corner_origin_pos.x ) * 1800/M_PI;
if( arc_angle_start < 900.0 )
arc_angle_start = 900.0;
bool first_point = true;
for( double curr_angle = arc_angle_start; ; curr_angle += arc_increment )
{
wxPoint corner_position = wxPoint( rounding_radius, 0 );
RotatePoint( &corner_position, curr_angle ); // Rounding vector rotation
corner_position += corner_origin_pos; // Rounding vector + Pad corner offset
// The arc angle is <= 90 degrees, therefore the arc is finished if the x coordinate
// decrease or the y coordinate is smaller than the y end point
if( !first_point &&
( corner_position.x >= corners_buffer.back().x || corner_position.y > arc_end_point.y ) )
break;
first_point = false;
// Note: for hole in position 1, arc x coordinate is always < x starting point
// and arc y coordinate is always <= y ending point
if( corner_position != corners_buffer.back() // avoid duplicate corners.
&& corner_position.x <= arc_start_point.x ) // skip current point at the right of the starting point
corners_buffer.push_back( corner_position );
}
for( int irect = 0; irect < 2; irect++ )
{
aCornerBuffer.NewOutline();
for( unsigned ic = 0; ic < corners_buffer.size(); ic++ )
{
wxPoint cpos = corners_buffer[ic];
RotatePoint( &cpos, angle ); // Rotate according to module orientation
cpos += padShapePos; // Shift origin to position
aCornerBuffer.Append( cpos.x, cpos.y );
}
angle = AddAngles( angle, 1800 ); // this is calculate hole 3
}
// Create holes, that are the mirrored from the previous holes
for( unsigned ic = 0; ic < corners_buffer.size(); ic++ )
{
wxPoint swap = corners_buffer[ic];
swap.x = -swap.x;
corners_buffer[ic] = swap;
}
// Now add corner 4 and 2 (2 is the corner 4 rotated by 180 deg
for( int irect = 0; irect < 2; irect++ )
{
aCornerBuffer.NewOutline();
for( unsigned ic = 0; ic < corners_buffer.size(); ic++ )
{
wxPoint cpos = corners_buffer[ic];
RotatePoint( &cpos, angle );
cpos += padShapePos;
aCornerBuffer.Append( cpos.x, cpos.y );
}
angle = AddAngles( angle, 1800 );
}
}
break;
case PAD_SHAPE_TRAPEZOID:
{
SHAPE_POLY_SET antipad; // The full antipad area
// We need a length to build the stubs of the thermal reliefs
// the value is not very important. The pad bounding box gives a reasonable value
EDA_RECT bbox = aPad.GetBoundingBox();
int stub_len = std::max( bbox.GetWidth(), bbox.GetHeight() );
aPad.TransformShapeWithClearanceToPolygon( antipad, aThermalGap );
SHAPE_POLY_SET stub; // A basic stub ( a rectangle)
SHAPE_POLY_SET stubs; // the full stubs shape
// We now substract the stubs (connections to the copper zone)
//ClipperLib::Clipper clip_engine;
// Prepare a clipping transform
//clip_engine.AddPath( antipad, ClipperLib::ptSubject, true );
// Create stubs and add them to clipper engine
wxPoint stubBuffer[4];
stubBuffer[0].x = stub_len;
stubBuffer[0].y = copper_thickness.y/2;
stubBuffer[1] = stubBuffer[0];
stubBuffer[1].y = -copper_thickness.y/2;
stubBuffer[2] = stubBuffer[1];
stubBuffer[2].x = -stub_len;
stubBuffer[3] = stubBuffer[2];
stubBuffer[3].y = copper_thickness.y/2;
stub.NewOutline();
for( unsigned ii = 0; ii < arrayDim( stubBuffer ); ii++ )
{
wxPoint cpos = stubBuffer[ii];
RotatePoint( &cpos, aPad.GetOrientation() );
cpos += padShapePos;
stub.Append( cpos.x, cpos.y );
}
stubs.Append( stub );
stubBuffer[0].y = stub_len;
stubBuffer[0].x = copper_thickness.x/2;
stubBuffer[1] = stubBuffer[0];
stubBuffer[1].x = -copper_thickness.x/2;
stubBuffer[2] = stubBuffer[1];
stubBuffer[2].y = -stub_len;
stubBuffer[3] = stubBuffer[2];
stubBuffer[3].x = copper_thickness.x/2;
stub.RemoveAllContours();
stub.NewOutline();
for( unsigned ii = 0; ii < arrayDim( stubBuffer ); ii++ )
{
wxPoint cpos = stubBuffer[ii];
RotatePoint( &cpos, aPad.GetOrientation() );
cpos += padShapePos;
stub.Append( cpos.x, cpos.y );
}
stubs.Append( stub );
stubs.Simplify( SHAPE_POLY_SET::PM_FAST );
antipad.BooleanSubtract( stubs, SHAPE_POLY_SET::PM_FAST );
aCornerBuffer.Append( antipad );
break;
}
default:
;
}
}
void ZONE_CONTAINER::TransformShapeWithClearanceToPolygon(
SHAPE_POLY_SET& aCornerBuffer, int aClearanceValue, int aError, bool ignoreLineWidth ) const
{
wxASSERT_MSG( !ignoreLineWidth, "IgnoreLineWidth has no meaning for zones." );
aCornerBuffer = m_FilledPolysList;
aCornerBuffer.Simplify( SHAPE_POLY_SET::PM_STRICTLY_SIMPLE );
}
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