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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) 1992-2021 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 <algorithm>
34#include <math.h> // for copysign
35#include <stdlib.h> // for abs
36#include <math/box2.h>
37#include <geometry/eda_angle.h>
38
45
54int GetArcToSegmentCount( int aRadius, int aErrorMax, const EDA_ANGLE& aArcAngle );
55
64int CircleToEndSegmentDeltaRadius( int aInnerCircleRadius, int aSegCount );
65
77{
78public:
81};
82
92int GetCircleToPolyCorrection( int aMaxError );
93
105template<typename T>
106VECTOR2<T> GetVectorSnapped45( const VECTOR2<T>& aVec, bool only45 = false )
107{
108 using ext_type = typename VECTOR2<T>::extended_type;
109
110 auto newVec = aVec;
111 const VECTOR2<T> absVec{ std::abs( aVec.x ), std::abs( aVec.y ) };
112
113 if( !only45 && absVec.x > ext_type( absVec.y ) * 2 )
114 {
115 // snap along x-axis
116 newVec.y = 0;
117 }
118 else if( !only45 && absVec.y > ext_type( absVec.x ) * 2 )
119 {
120 // snap onto y-axis
121 newVec.x = 0;
122 }
123 else if( absVec.x > absVec.y )
124 {
125 // snap away from x-axis towards 45
126 newVec.y = std::copysign( aVec.x, aVec.y );
127 }
128 else
129 {
130 // snap away from y-axis towards 45
131 newVec.x = std::copysign( aVec.y, aVec.x );
132 }
133
134 return newVec;
135}
136
137
150template <typename in_type, typename ret_type = in_type, typename pad_type = unsigned int,
151 typename = typename std::enable_if<std::is_unsigned<pad_type>::value>::type>
152VECTOR2<ret_type> GetClampedCoords( const VECTOR2<in_type>& aCoords, pad_type aPadding = 1u )
153{
154 typedef std::numeric_limits<int32_t> coord_limits;
155
156 in_type x = aCoords.x;
157 in_type y = aCoords.y;
158
159 if constexpr( !std::is_floating_point_v<in_type> )
160 {
161 int64_t max = static_cast<int64_t>( coord_limits::max() ) - aPadding;
162 int64_t min = -max;
163 x = std::clamp<int64_t>( static_cast<int64_t>( x ), min, max );
164 y = std::clamp<int64_t>( static_cast<int64_t>( y ), min, max );
165 }
166 else
167 {
168 double max = static_cast<double>( coord_limits::max() ) - aPadding;
169 double min = -max;
170 x = std::clamp<double>( static_cast<double>( x ), min, max );
171 y = std::clamp<double>( static_cast<double>( y ), min, max );
172 }
173
174 if constexpr( !std::is_integral_v<in_type> && std::is_integral_v<ret_type> )
175 {
176 return VECTOR2<ret_type>( KiROUND<in_type, ret_type>( x, true ),
177 KiROUND<in_type, ret_type>( y, true ) );
178 }
179
180 return VECTOR2<ret_type>( x, y );
181}
182
183
197bool ClipLine( const BOX2I *aClipBox, int &x1, int &y1, int &x2, int &y2 );
198
199
200#endif // #ifndef GEOMETRY_UTILS_H
When creating polygons to create a clearance polygonal area, the polygon must be same or bigger than ...
Define a general 2D-vector/point.
Definition: vector2d.h:71
VECTOR2_TRAITS< T >::extended_type extended_type
Definition: vector2d.h:73
int GetCircleToPolyCorrection(int aMaxError)
int CircleToEndSegmentDeltaRadius(int aInnerCircleRadius, int aSegCount)
ERROR_LOC
When approximating an arc or circle, should the error be placed on the outside or inside of the curve...
@ ERROR_OUTSIDE
@ ERROR_INSIDE
VECTOR2< T > GetVectorSnapped45(const VECTOR2< T > &aVec, bool only45=false)
Snap a vector onto the nearest 0, 45 or 90 degree line.
bool ClipLine(const BOX2I *aClipBox, int &x1, int &y1, int &x2, int &y2)
Test if any part of a line falls within the bounds of a rectangle.
int GetArcToSegmentCount(int aRadius, int aErrorMax, const EDA_ANGLE &aArcAngle)
VECTOR2< ret_type > GetClampedCoords(const VECTOR2< in_type > &aCoords, pad_type aPadding=1u)
Clamps a vector to values that can be negated, respecting numeric limits of coordinates data type wit...
EDA_ANGLE abs(const EDA_ANGLE &aAngle)
Definition: eda_angle.h:390