KiCad PCB EDA Suite
board_items_to_polygon_shape_transform.cpp File Reference
#include <vector>
#include <fctsys.h>
#include <drawtxt.h>
#include <pcbnew.h>
#include <wxPcbStruct.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>

Go to the source code of this file.

Functions

static void addTextSegmToPoly (int x0, int y0, int xf, int yf)
 
void CreateThermalReliefPadPolygon (SHAPE_POLY_SET &aCornerBuffer, D_PAD &aPad, int aThermalGap, int aCopperThickness, int aMinThicknessValue, int aCircleToSegmentsCount, double aCorrectionFactor, double aThermalRot)
 Function CreateThermalReliefPadPolygon Add holes around a pad to create a thermal relief copper thickness is min (dx/2, aCopperWitdh) or min (dy/2, aCopperWitdh) More...
 

Variables

static int s_textWidth
 
static int s_textCircle2SegmentCount
 
static SHAPE_POLY_SETs_cornerBuffer
 

Function Documentation

static void addTextSegmToPoly ( int  x0,
int  y0,
int  xf,
int  yf 
)
static

Definition at line 58 of file board_items_to_polygon_shape_transform.cpp.

References s_textCircle2SegmentCount, s_textWidth, and TransformRoundedEndsSegmentToPolygon().

Referenced by MODULE::TransformGraphicShapesWithClearanceToPolygonSet(), MODULE::TransformGraphicTextWithClearanceToPolygonSet(), and TEXTE_PCB::TransformShapeWithClearanceToPolygonSet().

59 {
61  wxPoint( x0, y0), wxPoint( xf, yf ),
63 }
void TransformRoundedEndsSegmentToPolygon(SHAPE_POLY_SET &aCornerBuffer, wxPoint aStart, wxPoint aEnd, int aCircleToSegmentsCount, int aWidth)
Function TransformRoundedEndsSegmentToPolygon convert a segment with rounded ends to a polygon Conver...
static SHAPE_POLY_SET * s_cornerBuffer
static int s_textCircle2SegmentCount
void CreateThermalReliefPadPolygon ( SHAPE_POLY_SET aCornerBuffer,
D_PAD aPad,
int  aThermalGap,
int  aCopperThickness,
int  aMinThicknessValue,
int  aCircleToSegmentsCount,
double  aCorrectionFactor,
double  aThermalRot 
)

Function CreateThermalReliefPadPolygon Add holes around a pad to create a thermal relief copper thickness is min (dx/2, aCopperWitdh) or min (dy/2, aCopperWitdh)

Parameters
aCornerBuffer= a buffer to store the polygon
aPad= the current pad used to create the thermal shape
aThermalGap= gap in thermal shape
aCopperThickness= stubs thickness in thermal shape
aMinThicknessValue= min copper thickness allowed
aCircleToSegmentsCount= the number of segments to approximate a circle
aCorrectionFactor= the correction to apply to circles radius to keep
aThermalRot= for rond pads the rotation of thermal stubs (450 usually for 45 deg.)

Definition at line 828 of file board_items_to_polygon_shape_transform.cpp.

References AddAngles(), PNS::angle(), SHAPE_POLY_SET::Append(), SHAPE_POLY_SET::BooleanSubtract(), delta, DIM, D_PAD::GetBoundingBox(), EDA_RECT::GetHeight(), D_PAD::GetOrientation(), D_PAD::GetShape(), D_PAD::GetSize(), EDA_RECT::GetWidth(), KiROUND(), max, min, SHAPE_POLY_SET::NewOutline(), PAD_SHAPE_CIRCLE, PAD_SHAPE_OVAL, PAD_SHAPE_RECT, PAD_SHAPE_ROUNDRECT, PAD_SHAPE_TRAPEZOID, SHAPE_POLY_SET::PM_FAST, SHAPE_POLY_SET::RemoveAllContours(), RotatePoint(), D_PAD::ShapePos(), SHAPE_POLY_SET::Simplify(), D_PAD::TransformShapeWithClearanceToPolygon(), wxPoint::x, and wxPoint::y.

Referenced by ZONE_CONTAINER::buildFeatureHoleList().

836 {
837  wxPoint corner, corner_end;
838  wxPoint padShapePos = aPad.ShapePos(); // Note: for pad having a shape offset,
839  // the pad position is NOT the shape position
840  wxSize copper_thickness;
841 
842  double delta = 3600.0 / aCircleToSegmentsCount; // rot angle in 0.1 degree
843 
844  /* Keep in account the polygon outline thickness
845  * aThermalGap must be increased by aMinThicknessValue/2 because drawing external outline
846  * with a thickness of aMinThicknessValue will reduce gap by aMinThicknessValue/2
847  */
848  aThermalGap += aMinThicknessValue / 2;
849 
850  /* Keep in account the polygon outline thickness
851  * copper_thickness must be decreased by aMinThicknessValue because drawing outlines
852  * with a thickness of aMinThicknessValue will increase real thickness by aMinThicknessValue
853  */
854  aCopperThickness -= aMinThicknessValue;
855 
856  if( aCopperThickness < 0 )
857  aCopperThickness = 0;
858 
859  int dx = aPad.GetSize().x / 2;
860  int dy = aPad.GetSize().y / 2;
861 
862  copper_thickness.x = std::min( dx, aCopperThickness );
863  copper_thickness.y = std::min( dy, aCopperThickness );
864 
865  switch( aPad.GetShape() )
866  {
867  case PAD_SHAPE_CIRCLE: // Add 4 similar holes
868  {
869  /* we create 4 copper holes and put them in position 1, 2, 3 and 4
870  * here is the area of the rectangular pad + its thermal gap
871  * the 4 copper holes remove the copper in order to create the thermal gap
872  * 4 ------ 1
873  * | |
874  * | |
875  * | |
876  * | |
877  * 3 ------ 2
878  * holes 2, 3, 4 are the same as hole 1, rotated 90, 180, 270 deg
879  */
880 
881  // Build the hole pattern, for the hole in the X >0, Y > 0 plane:
882  // The pattern roughtly is a 90 deg arc pie
883  std::vector <wxPoint> corners_buffer;
884 
885  // Radius of outer arcs of the shape corrected for arc approximation by lines
886  int outer_radius = KiROUND( (dx + aThermalGap) * aCorrectionFactor );
887 
888  // Crosspoint of thermal spoke sides, the first point of polygon buffer
889  corners_buffer.push_back( wxPoint( copper_thickness.x / 2, copper_thickness.y / 2 ) );
890 
891  // Add an intermediate point on spoke sides, to allow a > 90 deg angle between side
892  // and first seg of arc approx
893  corner.x = copper_thickness.x / 2;
894  int y = outer_radius - (aThermalGap / 4);
895  corner.y = KiROUND( sqrt( ( (double) y * y - (double) corner.x * corner.x ) ) );
896 
897  if( aThermalRot != 0 )
898  corners_buffer.push_back( corner );
899 
900  // calculate the starting point of the outter arc
901  corner.x = copper_thickness.x / 2;
902 
903  corner.y = KiROUND( sqrt( ( (double) outer_radius * outer_radius ) -
904  ( (double) corner.x * corner.x ) ) );
905  RotatePoint( &corner, 90 ); // 9 degrees is the spoke fillet size
906 
907  // calculate the ending point of the outter arc
908  corner_end.x = corner.y;
909  corner_end.y = corner.x;
910 
911  // calculate intermediate points (y coordinate from corner.y to corner_end.y
912  while( (corner.y > corner_end.y) && (corner.x < corner_end.x) )
913  {
914  corners_buffer.push_back( corner );
915  RotatePoint( &corner, delta );
916  }
917 
918  corners_buffer.push_back( corner_end );
919 
920  /* add an intermediate point, to avoid angles < 90 deg between last arc approx line
921  * and radius line
922  */
923  corner.x = corners_buffer[1].y;
924  corner.y = corners_buffer[1].x;
925  corners_buffer.push_back( corner );
926 
927  // Now, add the 4 holes ( each is the pattern, rotated by 0, 90, 180 and 270 deg
928  // aThermalRot = 450 (45.0 degrees orientation) work fine.
929  double angle_pad = aPad.GetOrientation(); // Pad orientation
930  double th_angle = aThermalRot;
931 
932  for( unsigned ihole = 0; ihole < 4; ihole++ )
933  {
934  aCornerBuffer.NewOutline();
935 
936  for( unsigned ii = 0; ii < corners_buffer.size(); ii++ )
937  {
938  corner = corners_buffer[ii];
939  RotatePoint( &corner, th_angle + angle_pad ); // Rotate by segment angle and pad orientation
940  corner += padShapePos;
941  aCornerBuffer.Append( corner.x, corner.y );
942  }
943 
944  th_angle += 900; // Note: th_angle in in 0.1 deg.
945  }
946  }
947  break;
948 
949  case PAD_SHAPE_OVAL:
950  {
951  // Oval pad support along the lines of round and rectangular pads
952  std::vector <wxPoint> corners_buffer; // Polygon buffer as vector
953 
954  dx = (aPad.GetSize().x / 2) + aThermalGap; // Cutout radius x
955  dy = (aPad.GetSize().y / 2) + aThermalGap; // Cutout radius y
956 
957  wxPoint shape_offset;
958 
959  // We want to calculate an oval shape with dx > dy.
960  // if this is not the case, exchange dx and dy, and rotate the shape 90 deg.
961  int supp_angle = 0;
962 
963  if( dx < dy )
964  {
965  std::swap( dx, dy );
966  supp_angle = 900;
967  std::swap( copper_thickness.x, copper_thickness.y );
968  }
969 
970  int deltasize = dx - dy; // = distance between shape position and the 2 demi-circle ends centre
971  // here we have dx > dy
972  // Radius of outer arcs of the shape:
973  int outer_radius = dy; // The radius of the outer arc is radius end + aThermalGap
974 
975  // Some coordinate fiddling, depending on the shape offset direction
976  shape_offset = wxPoint( deltasize, 0 );
977 
978  // Crosspoint of thermal spoke sides, the first point of polygon buffer
979  corner.x = copper_thickness.x / 2;
980  corner.y = copper_thickness.y / 2;
981  corners_buffer.push_back( corner );
982 
983  // Arc start point calculation, the intersecting point of cutout arc and thermal spoke edge
984  // If copper thickness is more than shape offset, we need to calculate arc intercept point.
985  if( copper_thickness.x > deltasize )
986  {
987  corner.x = copper_thickness.x / 2;
988  corner.y = KiROUND( sqrt( ( (double) outer_radius * outer_radius ) -
989  ( (double) ( corner.x - delta ) * ( corner.x - deltasize ) ) ) );
990  corner.x -= deltasize;
991 
992  /* creates an intermediate point, to have a > 90 deg angle
993  * between the side and the first segment of arc approximation
994  */
995  wxPoint intpoint = corner;
996  intpoint.y -= aThermalGap / 4;
997  corners_buffer.push_back( intpoint + shape_offset );
998  RotatePoint( &corner, 90 ); // 9 degrees of thermal fillet
999  }
1000  else
1001  {
1002  corner.x = copper_thickness.x / 2;
1003  corner.y = outer_radius;
1004  corners_buffer.push_back( corner );
1005  }
1006 
1007  // Add an intermediate point on spoke sides, to allow a > 90 deg angle between side
1008  // and first seg of arc approx
1009  wxPoint last_corner;
1010  last_corner.y = copper_thickness.y / 2;
1011  int px = outer_radius - (aThermalGap / 4);
1012  last_corner.x =
1013  KiROUND( sqrt( ( ( (double) px * px ) - (double) last_corner.y * last_corner.y ) ) );
1014 
1015  // Arc stop point calculation, the intersecting point of cutout arc and thermal spoke edge
1016  corner_end.y = copper_thickness.y / 2;
1017  corner_end.x =
1018  KiROUND( sqrt( ( (double) outer_radius *
1019  outer_radius ) - ( (double) corner_end.y * corner_end.y ) ) );
1020  RotatePoint( &corner_end, -90 ); // 9 degrees of thermal fillet
1021 
1022  // calculate intermediate arc points till limit is reached
1023  while( (corner.y > corner_end.y) && (corner.x < corner_end.x) )
1024  {
1025  corners_buffer.push_back( corner + shape_offset );
1026  RotatePoint( &corner, delta );
1027  }
1028 
1029  //corners_buffer.push_back(corner + shape_offset); // TODO: about one mil geometry error forms somewhere.
1030  corners_buffer.push_back( corner_end + shape_offset );
1031  corners_buffer.push_back( last_corner + shape_offset ); // Enabling the line above shows intersection point.
1032 
1033  /* Create 2 holes, rotated by pad rotation.
1034  */
1035  double angle = aPad.GetOrientation() + supp_angle;
1036 
1037  for( int irect = 0; irect < 2; irect++ )
1038  {
1039  aCornerBuffer.NewOutline();
1040  for( unsigned ic = 0; ic < corners_buffer.size(); ic++ )
1041  {
1042  wxPoint cpos = corners_buffer[ic];
1043  RotatePoint( &cpos, angle );
1044  cpos += padShapePos;
1045  aCornerBuffer.Append( cpos.x, cpos.y );
1046  }
1047 
1048  angle = AddAngles( angle, 1800 ); // this is calculate hole 3
1049  }
1050 
1051  // Create holes, that are the mirrored from the previous holes
1052  for( unsigned ic = 0; ic < corners_buffer.size(); ic++ )
1053  {
1054  wxPoint swap = corners_buffer[ic];
1055  swap.x = -swap.x;
1056  corners_buffer[ic] = swap;
1057  }
1058 
1059  // Now add corner 4 and 2 (2 is the corner 4 rotated by 180 deg
1060  angle = aPad.GetOrientation() + supp_angle;
1061 
1062  for( int irect = 0; irect < 2; irect++ )
1063  {
1064  aCornerBuffer.NewOutline();
1065 
1066  for( unsigned ic = 0; ic < corners_buffer.size(); ic++ )
1067  {
1068  wxPoint cpos = corners_buffer[ic];
1069  RotatePoint( &cpos, angle );
1070  cpos += padShapePos;
1071  aCornerBuffer.Append( cpos.x, cpos.y );
1072  }
1073 
1074  angle = AddAngles( angle, 1800 );
1075  }
1076  }
1077  break;
1078 
1079  case PAD_SHAPE_ROUNDRECT: // thermal shape is the same for round rect and rect.
1080  case PAD_SHAPE_RECT:
1081  {
1082  /* we create 4 copper holes and put them in position 1, 2, 3 and 4
1083  * here is the area of the rectangular pad + its thermal gap
1084  * the 4 copper holes remove the copper in order to create the thermal gap
1085  * 4 ------ 1
1086  * | |
1087  * | |
1088  * | |
1089  * | |
1090  * 3 ------ 2
1091  * hole 3 is the same as hole 1, rotated 180 deg
1092  * hole 4 is the same as hole 2, rotated 180 deg and is the same as hole 1, mirrored
1093  */
1094 
1095  // First, create a rectangular hole for position 1 :
1096  // 2 ------- 3
1097  // | |
1098  // | |
1099  // | |
1100  // 1 -------4
1101 
1102  // Modified rectangles with one corner rounded. TODO: merging with oval thermals
1103  // and possibly round too.
1104 
1105  std::vector <wxPoint> corners_buffer; // Polygon buffer as vector
1106 
1107  dx = (aPad.GetSize().x / 2) + aThermalGap; // Cutout radius x
1108  dy = (aPad.GetSize().y / 2) + aThermalGap; // Cutout radius y
1109 
1110  // The first point of polygon buffer is left lower corner, second the crosspoint of
1111  // thermal spoke sides, the third is upper right corner and the rest are rounding
1112  // vertices going anticlockwise. Note the inveted Y-axis in CG.
1113  corners_buffer.push_back( wxPoint( -dx, -(aThermalGap / 4 + copper_thickness.y / 2) ) ); // Adds small miters to zone
1114  corners_buffer.push_back( wxPoint( -(dx - aThermalGap / 4), -copper_thickness.y / 2 ) ); // fill and spoke corner
1115  corners_buffer.push_back( wxPoint( -copper_thickness.x / 2, -copper_thickness.y / 2 ) );
1116  corners_buffer.push_back( wxPoint( -copper_thickness.x / 2, -(dy - aThermalGap / 4) ) );
1117  corners_buffer.push_back( wxPoint( -(aThermalGap / 4 + copper_thickness.x / 2), -dy ) );
1118 
1119  double angle = aPad.GetOrientation();
1120  int rounding_radius = KiROUND( aThermalGap * aCorrectionFactor ); // Corner rounding radius
1121 
1122  for( int i = 0; i < aCircleToSegmentsCount / 4 + 1; i++ )
1123  {
1124  wxPoint corner_position = wxPoint( 0, -rounding_radius );
1125 
1126  // Start at half increment offset
1127  RotatePoint( &corner_position, 1800.0 / aCircleToSegmentsCount );
1128  double angle_pg = i * delta;
1129 
1130  RotatePoint( &corner_position, angle_pg ); // Rounding vector rotation
1131  corner_position -= aPad.GetSize() / 2; // Rounding vector + Pad corner offset
1132 
1133  corners_buffer.push_back( wxPoint( corner_position.x, corner_position.y ) );
1134  }
1135 
1136  for( int irect = 0; irect < 2; irect++ )
1137  {
1138  aCornerBuffer.NewOutline();
1139 
1140  for( unsigned ic = 0; ic < corners_buffer.size(); ic++ )
1141  {
1142  wxPoint cpos = corners_buffer[ic];
1143  RotatePoint( &cpos, angle ); // Rotate according to module orientation
1144  cpos += padShapePos; // Shift origin to position
1145  aCornerBuffer.Append( cpos.x, cpos.y );
1146  }
1147 
1148  angle = AddAngles( angle, 1800 ); // this is calculate hole 3
1149  }
1150 
1151  // Create holes, that are the mirrored from the previous holes
1152  for( unsigned ic = 0; ic < corners_buffer.size(); ic++ )
1153  {
1154  wxPoint swap = corners_buffer[ic];
1155  swap.x = -swap.x;
1156  corners_buffer[ic] = swap;
1157  }
1158 
1159  // Now add corner 4 and 2 (2 is the corner 4 rotated by 180 deg
1160  for( int irect = 0; irect < 2; irect++ )
1161  {
1162  aCornerBuffer.NewOutline();
1163 
1164  for( unsigned ic = 0; ic < corners_buffer.size(); ic++ )
1165  {
1166  wxPoint cpos = corners_buffer[ic];
1167  RotatePoint( &cpos, angle );
1168  cpos += padShapePos;
1169  aCornerBuffer.Append( cpos.x, cpos.y );
1170  }
1171 
1172  angle = AddAngles( angle, 1800 );
1173  }
1174  }
1175  break;
1176 
1177  case PAD_SHAPE_TRAPEZOID:
1178  {
1179  SHAPE_POLY_SET antipad; // The full antipad area
1180 
1181  // We need a length to build the stubs of the thermal reliefs
1182  // the value is not very important. The pad bounding box gives a reasonable value
1183  EDA_RECT bbox = aPad.GetBoundingBox();
1184  int stub_len = std::max( bbox.GetWidth(), bbox.GetHeight() );
1185 
1186  aPad.TransformShapeWithClearanceToPolygon( antipad, aThermalGap,
1187  aCircleToSegmentsCount, aCorrectionFactor );
1188 
1189  SHAPE_POLY_SET stub; // A basic stub ( a rectangle)
1190  SHAPE_POLY_SET stubs; // the full stubs shape
1191 
1192 
1193  // We now substract the stubs (connections to the copper zone)
1194  //ClipperLib::Clipper clip_engine;
1195  // Prepare a clipping transform
1196  //clip_engine.AddPath( antipad, ClipperLib::ptSubject, true );
1197 
1198  // Create stubs and add them to clipper engine
1199  wxPoint stubBuffer[4];
1200  stubBuffer[0].x = stub_len;
1201  stubBuffer[0].y = copper_thickness.y/2;
1202  stubBuffer[1] = stubBuffer[0];
1203  stubBuffer[1].y = -copper_thickness.y/2;
1204  stubBuffer[2] = stubBuffer[1];
1205  stubBuffer[2].x = -stub_len;
1206  stubBuffer[3] = stubBuffer[2];
1207  stubBuffer[3].y = copper_thickness.y/2;
1208 
1209  stub.NewOutline();
1210 
1211  for( unsigned ii = 0; ii < DIM( stubBuffer ); ii++ )
1212  {
1213  wxPoint cpos = stubBuffer[ii];
1214  RotatePoint( &cpos, aPad.GetOrientation() );
1215  cpos += padShapePos;
1216  stub.Append( cpos.x, cpos.y );
1217  }
1218 
1219  stubs.Append( stub );
1220 
1221  stubBuffer[0].y = stub_len;
1222  stubBuffer[0].x = copper_thickness.x/2;
1223  stubBuffer[1] = stubBuffer[0];
1224  stubBuffer[1].x = -copper_thickness.x/2;
1225  stubBuffer[2] = stubBuffer[1];
1226  stubBuffer[2].y = -stub_len;
1227  stubBuffer[3] = stubBuffer[2];
1228  stubBuffer[3].x = copper_thickness.x/2;
1229 
1230  stub.RemoveAllContours();
1231  stub.NewOutline();
1232 
1233  for( unsigned ii = 0; ii < DIM( stubBuffer ); ii++ )
1234  {
1235  wxPoint cpos = stubBuffer[ii];
1236  RotatePoint( &cpos, aPad.GetOrientation() );
1237  cpos += padShapePos;
1238  stub.Append( cpos.x, cpos.y );
1239  }
1240 
1241  stubs.Append( stub );
1243 
1244  antipad.BooleanSubtract( stubs, SHAPE_POLY_SET::PM_FAST );
1245  aCornerBuffer.Append( antipad );
1246 
1247  break;
1248  }
1249 
1250  default:
1251  ;
1252  }
1253 }
#define DIM(x)
of elements in an array
Definition: macros.h:98
static int KiROUND(double v)
KiROUND rounds a floating point number to an int using "round halfway cases away from zero"...
Definition: common.h:107
int GetHeight() const
void RotatePoint(int *pX, int *pY, double angle)
Definition: trigo.cpp:317
PAD_SHAPE_T GetShape() const
Function GetShape.
Definition: class_pad.h:201
static const int delta[8][2]
Definition: solve.cpp:112
void TransformShapeWithClearanceToPolygon(SHAPE_POLY_SET &aCornerBuffer, int aClearanceValue, int aCircleToSegmentsCount, double aCorrectionFactor) const
Function TransformShapeWithClearanceToPolygon Convert the pad shape to a closed polygon Used in filli...
T AddAngles(T a1, T2 a2)
Add two angles (keeping the result normalized). T2 is here.
Definition: trigo.h:246
Class SHAPE_POLY_SET.
const wxSize & GetSize() const
Definition: class_pad.h:254
void Simplify(POLYGON_MODE aFastMode)
Simplifies the polyset (merges overlapping polys, eliminates degeneracy/self-intersections) For aFast...
int NewOutline()
Creates a new empty polygon in the set and returns its index
#define max(a, b)
Definition: auxiliary.h:86
static DIRECTION_45::AngleType angle(const VECTOR2I &a, const VECTOR2I &b)
void RemoveAllContours()
Removes all outlines & holes (clears) the polygon set.
double GetOrientation() const
Function GetOrientation returns the rotation angle of the pad in tenths of degrees, but soon degrees.
Definition: class_pad.h:357
Class EDA_RECT handles the component boundary box.
int GetWidth() const
wxPoint ShapePos() const
Definition: class_pad.cpp:500
void BooleanSubtract(const SHAPE_POLY_SET &b, POLYGON_MODE aFastMode)
Performs boolean polyset difference For aFastMode meaning, see function booleanOp ...
const EDA_RECT GetBoundingBox() const override
Function GetBoundingBox returns the orthogonal, bounding box of this object for display purposes...
Definition: class_pad.cpp:199
#define min(a, b)
Definition: auxiliary.h:85
int Append(int x, int y, int aOutline=-1, int aHole=-1, bool aAllowDuplication=false)
Appends a vertex at the end of the given outline/hole (default: the last outline) ...

Variable Documentation

SHAPE_POLY_SET* s_cornerBuffer
static

Definition at line 55 of file board_items_to_polygon_shape_transform.cpp.