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 
40 
49 int GetArcToSegmentCount( int aRadius, int aErrorMax, double aArcAngleDegree );
50 
62 double GetCircletoPolyCorrectionFactor( int aSegCountforCircle );
63 
75 template<typename T>
77 {
78  auto newVec = aVec;
79  const VECTOR2<T> absVec { std::abs( aVec.x ), std::abs( aVec.y ) };
80 
81  if ( absVec.x > absVec.y * 2 )
82  {
83  // snap along x-axis
84  newVec.y = 0;
85  }
86  else if ( absVec.y > absVec.x * 2 )
87  {
88  // snap onto y-axis
89  newVec.x = 0;
90  }
91  else if ( absVec.x > absVec.y )
92  {
93  // snap away from x-axis towards 45
94  newVec.y = std::copysign( aVec.x, aVec.y );
95  } else
96  {
97  // snap away from y-axis towards 45
98  newVec.x = std::copysign( aVec.y, aVec.x );
99  }
100 
101  return newVec;
102 }
103 
104 
118 bool ClipLine( const EDA_RECT *aClipBox, int &x1, int &y1, int &x2, int &y2 );
119 
120 
128 #define DOT_WIDTH_MILS 0.0254
129 
130 #define DOT_MARK_LEN( aLineWidth ) \
131  ( std::max( 1.0, IU_PER_MILS * DOT_WIDTH_MILS - aLineWidth ) )
132 
133 #define DASH_GAP_LEN( aLineWidth ) \
134  ( 3.0 * DOT_MARK_LEN( aLineWidth ) + ( 2.0 * aLineWidth ) )
135 
136 #define DASH_MARK_LEN( aLineWidth ) \
137  ( std::max( DASH_GAP_LEN( aLineWidth ), 5.0 * DOT_MARK_LEN( aLineWidth ) ) )
138 
139 
140 
141 #endif // #ifndef GEOMETRY_UTILS_H
142 
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.
double GetCircletoPolyCorrectionFactor(int aSegCountforCircle)
EDA_RECT handles the component boundary box.
Definition: eda_rect.h:44
VECTOR2< T > GetVectorSnapped45(const VECTOR2< T > &aVec)
Snap a vector onto the nearest 0, 45 or 90 degree line.
int GetArcToSegmentCount(int aRadius, int aErrorMax, double aArcAngleDegree)