Horizon
geometry_utils.h
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1/*
2 * This program source code file is part of KiCad, a free EDA CAD application.
3 *
4 * Copyright (C) 2018 Jean-Pierre Charras, jp.charras at wanadoo.fr
5 * Copyright (C) 1992-2018 KiCad Developers, see AUTHORS.txt for contributors.
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version 2
10 * of the License, or (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, you may find one here:
19 * http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
20 * or you may search the http://www.gnu.org website for the version 2 license,
21 * or you may write to the Free Software Foundation, Inc.,
22 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
23 */
24
30#ifndef GEOMETRY_UTILS_H
31#define GEOMETRY_UTILS_H
32
33#include <math/vector2d.h>
34#include <cmath>
35
44int GetArcToSegmentCount( int aRadius, int aErrorMax, double aArcAngleDegree );
45
57double GetCircletoPolyCorrectionFactor( int aSegCountforCircle );
58
70template<typename T>
72{
73 auto newVec = aVec;
74 const VECTOR2<T> absVec { std::abs( aVec.x ), std::abs( aVec.y ) };
75
76 if ( absVec.x > absVec.y * 2 )
77 {
78 // snap along x-axis
79 newVec.y = 0;
80 }
81 else if ( absVec.y > absVec.x * 2 )
82 {
83 // snap onto y-axis
84 newVec.x = 0;
85 }
86 else if ( absVec.x > absVec.y )
87 {
88 // snap away from x-axis towards 45
89 newVec.y = std::copysign( aVec.x, aVec.y );
90 } else
91 {
92 // snap away from y-axis towards 45
93 newVec.x = std::copysign( aVec.y, aVec.x );
94 }
95
96 return newVec;
97}
98
99
107#define DOT_WIDTH_MILS 0.0254
108
109#define DOT_MARK_LEN( aLineWidth ) \
110 ( std::max( 1.0, IU_PER_MILS * DOT_WIDTH_MILS - aLineWidth ) )
111
112#define DASH_GAP_LEN( aLineWidth ) \
113 ( 3.0 * DOT_MARK_LEN( aLineWidth ) + ( 2.0 * aLineWidth ) )
114
115#define DASH_MARK_LEN( aLineWidth ) \
116 ( std::max( DASH_GAP_LEN( aLineWidth ), 5.0 * DOT_MARK_LEN( aLineWidth ) ) )
117
118
119
120#endif // #ifndef GEOMETRY_UTILS_H
121
Class VECTOR2 defines a general 2D-vector/point.
Definition: vector2d.h:76
VECTOR2< T > GetVectorSnapped45(const VECTOR2< T > &aVec)
Snap a vector onto the nearest 0, 45 or 90 degree line.
Definition: geometry_utils.h:71
int GetArcToSegmentCount(int aRadius, int aErrorMax, double aArcAngleDegree)
Definition: geometry_utils.cpp:35
double GetCircletoPolyCorrectionFactor(int aSegCountforCircle)
Definition: geometry_utils.cpp:56