KiCad PCB EDA Suite
geometry_utils.h
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1 /*
2  * This program source code file is part of KiCad, a free EDA CAD application.
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4  * Copyright (C) 2018 Jean-Pierre Charras, jp.charras at wanadoo.fr
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24 
30 #ifndef GEOMETRY_UTILS_H
31 #define GEOMETRY_UTILS_H
32 
33 #include <math.h> // for copysign
34 #include <stdlib.h> // for abs
35 
36 #include <math/vector2d.h>
37 
38 class EDA_RECT;
39 
48 int GetArcToSegmentCount( int aRadius, int aErrorMax, double aArcAngleDegree );
49 
61 {
62 public:
65 };
66 
76 int GetCircleToPolyCorrection( int aMaxError );
77 
89 template<typename T>
90 VECTOR2<T> GetVectorSnapped45( const VECTOR2<T>& aVec, bool only45 = false )
91 {
92  auto newVec = aVec;
93  const VECTOR2<T> absVec { std::abs( aVec.x ), std::abs( aVec.y ) };
94 
95  if ( !only45 && absVec.x > absVec.y * 2 )
96  {
97  // snap along x-axis
98  newVec.y = 0;
99  }
100  else if ( !only45 && absVec.y > absVec.x * 2 )
101  {
102  // snap onto y-axis
103  newVec.x = 0;
104  }
105  else if ( absVec.x > absVec.y )
106  {
107  // snap away from x-axis towards 45
108  newVec.y = std::copysign( aVec.x, aVec.y );
109  } else
110  {
111  // snap away from y-axis towards 45
112  newVec.x = std::copysign( aVec.y, aVec.x );
113  }
114 
115  return newVec;
116 }
117 
118 
132 bool ClipLine( const EDA_RECT *aClipBox, int &x1, int &y1, int &x2, int &y2 );
133 
134 
142 #define DOT_WIDTH_MILS 0.0254
143 
144 #define DOT_MARK_LEN( aLineWidth ) \
145  ( std::max( 1.0, IU_PER_MILS * DOT_WIDTH_MILS - aLineWidth ) )
146 
147 #define DASH_GAP_LEN( aLineWidth ) \
148  ( 3.0 * DOT_MARK_LEN( aLineWidth ) + ( 2.0 * aLineWidth ) )
149 
150 #define DASH_MARK_LEN( aLineWidth ) \
151  ( std::max( DASH_GAP_LEN( aLineWidth ), 5.0 * DOT_MARK_LEN( aLineWidth ) ) )
152 
153 
154 
155 #endif // #ifndef GEOMETRY_UTILS_H
156 
VECTOR2< T > GetVectorSnapped45(const VECTOR2< T > &aVec, bool only45=false)
Snap a vector onto the nearest 0, 45 or 90 degree line.
VECTOR2 defines a general 2D-vector/point.
Definition: vector2d.h:61
bool ClipLine(const EDA_RECT *aClipBox, int &x1, int &y1, int &x2, int &y2)
Test if any part of a line falls within the bounds of a rectangle.
int GetCircleToPolyCorrection(int aMaxError)
When creating polygons to create a clearance polygonal area, the polygon must be same or bigger than ...
EDA_RECT handles the component boundary box.
Definition: eda_rect.h:44
int GetArcToSegmentCount(int aRadius, int aErrorMax, double aArcAngleDegree)