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kicad/qa/tests/libs/kimath/geometry/test_segment.cpp
John Beard 78cb6c1189 SEG: Correct sign in LineDistance
2024-09-06 19:26:58 +01:00

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/*
* This program source code file is part of KiCad, a free EDA CAD application.
*
* Copyright (C) 2017 CERN
* @author Alejandro García Montoro <alejandro.garciamontoro@gmail.com>
* Copyright (C) 2019-2021 KiCad Developers, see AUTHORS.txt for contributors.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, you may find one here:
* http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
* or you may search the http://www.gnu.org website for the version 2 license,
* or you may write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include <qa_utils/wx_utils/unit_test_utils.h>
#include <geometry/seg.h>
/**
* Predicate to check expected collision between two segments
* @param aSegA the first #SEG
* @param aSegB the second #SEG
* @param aClearance the collision clearance
* @param aExp expected collision
* @return does the distance calculated agree?
*/
bool SegCollideCorrect( const SEG& aSegA, const SEG& aSegB, int aClearance, bool aExp )
{
const bool AtoB = aSegA.Collide( aSegB, aClearance );
const bool BtoA = aSegB.Collide( aSegA, aClearance );
const bool ok = ( AtoB == aExp ) && ( BtoA == aExp );
if( AtoB != BtoA )
{
std::stringstream ss;
ss << "Segment collision is not the same in both directions: expected " << aExp << ", got "
<< AtoB << " & " << BtoA;
BOOST_TEST_INFO( ss.str() );
}
else if( !ok )
{
std::stringstream ss;
ss << "Collision incorrect: expected " << aExp << ", got " << AtoB;
BOOST_TEST_INFO( ss.str() );
}
return ok;
}
/**
* Predicate to check expected distance between two segments
* @param aSegA the first #SEG
* @param aSegB the second #SEG
* @param aExp expected distance
* @return does the distance calculated agree?
*/
bool SegDistanceCorrect( const SEG& aSegA, const SEG& aSegB, int aExp )
{
const int AtoB = aSegA.Distance( aSegB );
const int BtoA = aSegB.Distance( aSegA );
bool ok = ( AtoB == aExp ) && ( BtoA == aExp );
if( AtoB != BtoA )
{
std::stringstream ss;
ss << "Segment distance is not the same in both directions: expected " << aExp << ", got "
<< AtoB << " & " << BtoA;
BOOST_TEST_INFO( ss.str() );
}
else if( !ok )
{
std::stringstream ss;
ss << "Distance incorrect: expected " << aExp << ", got " << AtoB;
BOOST_TEST_INFO( ss.str() );
}
// Sanity check: the collision should be consistent with the distance
ok = ok && SegCollideCorrect( aSegA, aSegB, 0, aExp == 0 );
return ok;
}
/**
* Predicate to check expected distance between a segment and a point
* @param aSegA the segment
* @param aVec the vector (point)
* @param aExp expected distance
* @return does the distance calculated agree?
*/
bool SegVecDistanceCorrect( const SEG& aSeg, const VECTOR2I& aVec, int aExp )
{
const SEG::ecoord squaredDistance = aSeg.SquaredDistance( aVec );
BOOST_REQUIRE( squaredDistance >= 0 );
const int dist = aSeg.Distance( aVec );
bool ok = ( dist == aExp );
if( !ok )
{
std::stringstream ss;
ss << "Distance incorrect: expected " << aExp << ", got " << dist;
BOOST_TEST_INFO( ss.str() );
}
return ok;
}
/**
* Predicate to check expected collision between two segments
* @param aSegA the first #SEG
* @param sSegB the second #SEG
* @param aExp expected collinearity
* @return does the collinearity calculated agree?
*/
bool SegCollinearCorrect( const SEG& aSegA, const SEG& aSegB, bool aExp )
{
const bool AtoB = aSegA.Collinear( aSegB );
const bool BtoA = aSegB.Collinear( aSegA );
const bool ok = ( AtoB == aExp ) && ( BtoA == aExp );
if( AtoB != BtoA )
{
std::stringstream ss;
ss << "Segment collinearity is not the same in both directions: expected " << aExp
<< ", got " << AtoB << " & " << BtoA;
BOOST_TEST_INFO( ss.str() );
}
else if( !ok )
{
std::stringstream ss;
ss << "Collinearity incorrect: expected " << aExp << ", got " << AtoB;
BOOST_TEST_INFO( ss.str() );
}
return ok;
}
/**
* Predicate to check expected parallelism between two segments
* @param aSegA the first #SEG
* @param sSegB the second #SEG
* @param aExp expected parallelism: true = segments are parallel
* false = segments are not parallel
* @return does the parallelism calculated agree?
*/
bool SegParallelCorrect( const SEG& aSegA, const SEG& aSegB, bool aExp )
{
const bool AtoB = aSegA.ApproxParallel( aSegB );
const bool BtoA = aSegB.ApproxParallel( aSegA );
const bool ok = ( AtoB == aExp ) && ( BtoA == aExp );
if( AtoB != BtoA )
{
std::stringstream ss;
ss << "Segment parallelism is not the same in both directions: expected " << aExp
<< ", got AtoB: " << AtoB << " BtoA:" << BtoA;
BOOST_TEST_INFO( ss.str() );
}
else if( !ok )
{
std::stringstream ss;
ss << "Parallelism incorrect: expected " << aExp << ", got " << AtoB;
BOOST_TEST_INFO( ss.str() );
}
return ok;
}
/**
* Predicate to check expected perpendicularity between two segments
* @param aSegA the first #SEG
* @param sSegB the second #SEG
* @param aExp expected perpendicularity: true = segments are perpendicular
* false = segments are not perpendicular
* @return does the perpendicularity calculated agree?
*/
bool SegPerpendicularCorrect( const SEG& aSegA, const SEG& aSegB, bool aExp )
{
const bool AtoB = aSegA.ApproxPerpendicular( aSegB );
const bool BtoA = aSegB.ApproxPerpendicular( aSegA );
const bool ok = ( AtoB == aExp ) && ( BtoA == aExp );
if( AtoB != BtoA )
{
std::stringstream ss;
ss << "Segment perpendicularity is not the same in both directions: expected " << aExp
<< ", got AtoB: " << AtoB << " BtoA:" << BtoA;
BOOST_TEST_INFO( ss.str() );
}
else if( !ok )
{
std::stringstream ss;
ss << "Perpendicularity incorrect: expected " << aExp << ", got " << AtoB;
BOOST_TEST_INFO( ss.str() );
}
return ok;
}
BOOST_AUTO_TEST_SUITE( Segment )
/**
* Checks whether the construction of a segment referencing external points works
* and that the endpoints can be modified as normal points.
*/
BOOST_AUTO_TEST_CASE( EndpointCtorMod )
{
const VECTOR2I pointA{ 10, 20 };
const VECTOR2I pointB{ 100, 200 };
// Build a segment referencing the previous points
SEG segment( pointA, pointB );
BOOST_CHECK_EQUAL( pointA, VECTOR2I( 10, 20 ) );
BOOST_CHECK_EQUAL( pointB, VECTOR2I( 100, 200 ) );
// Modify the ends of the segments
segment.A += VECTOR2I( 10, 10 );
segment.B += VECTOR2I( 100, 100 );
// Check that the ends in segment are modified
BOOST_CHECK_EQUAL( segment.A, VECTOR2I( 20, 30 ) );
BOOST_CHECK_EQUAL( segment.B, VECTOR2I( 200, 300 ) );
}
struct SEG_SEG_DISTANCE_CASE
{
std::string m_case_name;
SEG m_seg_a;
SEG m_seg_b;
int m_exp_dist;
};
// clang-format off
static const std::vector<SEG_SEG_DISTANCE_CASE> seg_seg_dist_cases = {
{
"Parallel, 10 apart",
{ { 0, 0 }, { 10, 0 } },
{ { 0, 10 }, { 10, 10 } },
10,
},
{
"Non-parallel, 10 apart",
{ { 0, -5 }, { 10, 0 } },
{ { 0, 10 }, { 10, 10 } },
10,
},
{
"Co-incident",
{ { 0, 0 }, { 30, 0 } },
{ { 10, 0 }, { 20, 0 } },
0,
},
{
"Crossing",
{ { 0, -10 }, { 0, 10 } },
{ { -20, 0 }, { 20, 0 } },
0,
},
{
"T-junction",
{ { 0, -10 }, { 0, 10 } },
{ { -20, 0 }, { 0, 0 } },
0,
},
{
"T-junction (no touch)",
{ { 0, -10 }, { 0, 10 } },
{ { -20, 0 }, { -2, 0 } },
2,
},
};
// clang-format on
BOOST_AUTO_TEST_CASE( SegSegDistance )
{
for( const auto& c : seg_seg_dist_cases )
{
BOOST_TEST_CONTEXT( c.m_case_name )
{
BOOST_CHECK_PREDICATE( SegDistanceCorrect, ( c.m_seg_a )( c.m_seg_b )( c.m_exp_dist ) );
}
}
}
struct SEG_VECTOR_DISTANCE_CASE
{
std::string m_case_name;
SEG m_seg;
VECTOR2I m_vec;
int m_exp_dist;
};
// clang-format off
static const std::vector<SEG_VECTOR_DISTANCE_CASE> seg_vec_dist_cases = {
{
"On endpoint",
{ { 0, 0 }, { 10, 0 } },
{ 0, 0 },
0,
},
{
"On segment",
{ { 0, 0 }, { 10, 0 } },
{ 3, 0 },
0,
},
{
"At side",
{ { 0, 0 }, { 10, 0 } },
{ 3, 2 },
2,
},
{
"At end (collinear)",
{ { 0, 0 }, { 10, 0 } },
{ 12, 0 },
2,
},
{
"At end (not collinear)",
{ { 0, 0 }, { 1000, 0 } },
{ 1000 + 200, 200 },
282, // sqrt(200^2 + 200^2) = 282.8, rounded to nearest
},
{
"Issue 18473 (inside hit with rounding error)",
{ { 187360000, 42510000 }, { 105796472, 42510000 } },
{ 106645000, 42510000 },
0,
},
{
"Straight line x distance",
{ { 187360000, 42510000 }, { 105796472, 42510000 } },
{ 197360000, 42510000 },
10000000,
},
{
"Straight line -x distance",
{ { 187360000, 42510000 }, { 105796472, 42510000 } },
{ 104796472, 42510000 },
1000000,
},
};
// clang-format on
BOOST_AUTO_TEST_CASE( SegVecDistance )
{
for( const auto& c : seg_vec_dist_cases )
{
BOOST_TEST_CONTEXT( c.m_case_name )
{
BOOST_CHECK_PREDICATE( SegVecDistanceCorrect, ( c.m_seg )( c.m_vec )( c.m_exp_dist ) );
}
}
}
/**
* Test cases for collisions (with clearance, for no clearance,
* it's just a SEG_SEG_DISTANCE_CASE of 0)
*/
struct SEG_SEG_COLLIDE_CASE
{
std::string m_case_name;
SEG m_seg_a;
SEG m_seg_b;
int m_clearance;
bool m_exp_coll;
};
// clang-format off
static const std::vector<SEG_SEG_COLLIDE_CASE> seg_seg_coll_cases = {
{
"Parallel, 10 apart, 5 clear",
{ { 0, 0 }, { 10, 0 } },
{ { 0, 10 }, { 10, 10 } },
5,
false,
},
{
"Parallel, 10 apart, 10 clear",
{ { 0, 0 }, { 10, 0 } },
{ { 0, 10 }, { 10, 10 } },
10,
false,
},
{
"Parallel, 10 apart, 11 clear",
{ { 0, 0 }, { 10, 0 } },
{ { 0, 10 }, { 10, 10 } },
11,
true,
},
{
"T-junction, 2 apart, 2 clear",
{ { 0, -10 }, { 0, 0 } },
{ { -20, 0 }, { -2, 0 } },
2,
false,
},
{
"T-junction, 2 apart, 3 clear",
{ { 0, -10 }, { 0, 0 } },
{ { -20, 0 }, { -2, 0 } },
3,
true,
},
};
// clang-format on
BOOST_AUTO_TEST_CASE( SegSegCollision )
{
for( const auto& c : seg_seg_coll_cases )
{
BOOST_TEST_CONTEXT( c.m_case_name )
{
BOOST_CHECK_PREDICATE( SegCollideCorrect,
( c.m_seg_a )( c.m_seg_b )( c.m_clearance )( c.m_exp_coll ) );
}
}
}
/**
* Struct to hold general cases for collinearity, parallelism and perpendicularity
*/
struct SEG_SEG_BOOLEAN_CASE
{
std::string m_case_name;
SEG m_seg_a;
SEG m_seg_b;
bool m_exp_result;
};
// clang-format off
/**
* Test cases for collinearity
*/
static const std::vector<SEG_SEG_BOOLEAN_CASE> seg_vec_collinear_cases = {
{
"coincident",
{ { 0, 0 }, { 10, 0 } },
{ { 0, 0 }, { 10, 0 } },
true,
},
{
"end-to-end",
{ { 0, 0 }, { 10, 0 } },
{ { 10, 0 }, { 20, 0 } },
true,
},
{
"In segment",
{ { 0, 0 }, { 10, 0 } },
{ { 4, 0 }, { 7, 0 } },
true,
},
{
"At side, parallel",
{ { 0, 0 }, { 10, 0 } },
{ { 4, 1 }, { 7, 1 } },
false,
},
{
"crossing",
{ { 0, 0 }, { 10, 0 } },
{ { 5, -5 }, { 5, 5 } },
false,
},
};
// clang-format on
BOOST_AUTO_TEST_CASE( SegSegCollinear )
{
for( const auto& c : seg_vec_collinear_cases )
{
BOOST_TEST_CONTEXT( c.m_case_name )
{
BOOST_CHECK_PREDICATE( SegCollinearCorrect,
( c.m_seg_a )( c.m_seg_b )( c.m_exp_result ) );
}
}
}
// clang-format off
/**
* Test cases for parallelism
*/
static const std::vector<SEG_SEG_BOOLEAN_CASE> seg_vec_parallel_cases = {
{
"coincident",
{ { 0, 0 }, { 10, 0 } },
{ { 0, 0 }, { 10, 0 } },
true,
},
{
"end-to-end",
{ { 0, 0 }, { 10, 0 } },
{ { 10, 0 }, { 20, 0 } },
true,
},
{
"In segment",
{ { 0, 0 }, { 10, 0 } },
{ { 4, 0 }, { 7, 0 } },
true,
},
{
"At side, parallel",
{ { 0, 0 }, { 10, 0 } },
{ { 4, 1 }, { 7, 1 } },
true,
},
{
"crossing",
{ { 0, 0 }, { 10, 0 } },
{ { 5, -5 }, { 5, 5 } },
false,
},
};
// clang-format on
BOOST_AUTO_TEST_CASE( SegSegParallel )
{
for( const auto& c : seg_vec_parallel_cases )
{
BOOST_TEST_CONTEXT( c.m_case_name )
{
BOOST_CHECK_PREDICATE( SegParallelCorrect,
( c.m_seg_a )( c.m_seg_b )( c.m_exp_result ) );
}
}
}
// clang-format off
/**
* Test cases for perpendicularity
*/
static const std::vector<SEG_SEG_BOOLEAN_CASE> seg_vec_perpendicular_cases = {
{
"coincident",
{ { 0, 0 }, { 10, 0 } },
{ { 0, 0 }, { 10, 0 } },
false,
},
{
"end-to-end",
{ { 0, 0 }, { 10, 0 } },
{ { 10, 0 }, { 20, 0 } },
false,
},
{
"In segment",
{ { 0, 0 }, { 10, 0 } },
{ { 4, 0 }, { 7, 0 } },
false,
},
{
"At side, parallel",
{ { 0, 0 }, { 10, 0 } },
{ { 4, 1 }, { 7, 1 } },
false,
},
{
"crossing 45 deg",
{ { 0, 0 }, { 10, 0 } },
{ { 0, 0 }, { 5, 5 } },
false,
},
{
"very nearly perpendicular",
{ { 0, 0 }, { 10, 0 } },
{ { 0, 0 }, { 1, 10 } },
true, //allow error margin of 1 IU
},
{
"not really perpendicular",
{ { 0, 0 }, { 10, 0 } },
{ { 0, 0 }, { 3, 10 } },
false,
},
{
"perpendicular",
{ { 0, 0 }, { 10, 0 } },
{ { 0, 0 }, { 0, 10 } },
true,
},
{
"perpendicular not intersecting",
{ { 0, 0 }, { 10, 0 } },
{ { 15, 5 }, { 15, 10 } },
true,
},
};
// clang-format on
BOOST_AUTO_TEST_CASE( SegSegPerpendicular )
{
for( const auto& c : seg_vec_perpendicular_cases )
{
BOOST_TEST_CONTEXT( c.m_case_name )
{
BOOST_CHECK_PREDICATE( SegPerpendicularCorrect,
( c.m_seg_a )( c.m_seg_b )( c.m_exp_result ) );
}
}
}
/**
* Struct to hold cases for operations with a #SEG, and a #VECTOR2I
*/
struct SEG_VEC_CASE
{
std::string m_case_name;
SEG m_seg;
VECTOR2I m_vec;
};
// clang-format off
/**
* Test cases to create segments passing through a point
*/
static const std::vector<SEG_VEC_CASE> segment_and_point_cases = {
{
"Horizontal: point on edge of seg",
{ { 0, 0 }, { 10, 0 } },
{ 0, 0 },
},
{
"Horizontal: point in middle of seg",
{ { 0, 0 }, { 10, 0 } },
{ 5, 0 },
},
{
"Horizontal: point outside seg",
{ { 0, 0 }, { 10, 0 } },
{ 20, 20 },
},
{
"Vertical: point on edge of seg",
{ { 0, 0 }, { 0, 10 } },
{ 0, 0 },
},
{
"Vertical: point in middle of seg",
{ { 0, 0 }, { 0, 10 } },
{ 0, 5 },
},
{
"Vertical: point outside seg",
{ { 0, 0 }, { 0, 10 } },
{ 20, 20 },
},
};
// clang-format on
BOOST_AUTO_TEST_CASE( SegCreateParallel )
{
for( const auto& c : segment_and_point_cases )
{
BOOST_TEST_CONTEXT( c.m_case_name )
{
SEG perpendicular = c.m_seg.ParallelSeg( c.m_vec );
BOOST_CHECK_PREDICATE( SegParallelCorrect, ( perpendicular )( c.m_seg )( true ) );
BOOST_CHECK_PREDICATE( SegVecDistanceCorrect, ( perpendicular )( c.m_vec )( 0 ) );
}
}
}
BOOST_AUTO_TEST_CASE( SegCreatePerpendicular )
{
for( const auto& c : segment_and_point_cases )
{
BOOST_TEST_CONTEXT( c.m_case_name )
{
SEG perpendicular = c.m_seg.PerpendicularSeg( c.m_vec );
BOOST_CHECK_PREDICATE( SegPerpendicularCorrect, ( perpendicular )( c.m_seg )( true ) );
BOOST_CHECK_PREDICATE( SegVecDistanceCorrect, ( perpendicular )( c.m_vec )( 0 ) );
}
}
}
BOOST_AUTO_TEST_CASE( LineDistance )
{
SEG seg( { 0, 0 }, { 10, 0 } );
BOOST_TEST( seg.LineDistance( { 5, 0 } ) == 0 );
BOOST_TEST( seg.LineDistance( { 5, 8 } ) == 8 );
}
BOOST_AUTO_TEST_CASE( LineDistanceSided )
{
SEG seg( { 0, 0 }, { 10, 0 } );
BOOST_TEST( seg.LineDistance( { 5, 8 }, true ) == 8 );
BOOST_TEST( seg.LineDistance( { 5, -8 }, true ) == -8 );
}
BOOST_AUTO_TEST_SUITE_END()
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