241 lines
6.8 KiB
C++
241 lines
6.8 KiB
C++
/*
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* This program source code file is part of KiCad, a free EDA CAD application.
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*
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* Copyright (C) 2013 CERN
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* @author Tomasz Wlostowski <tomasz.wlostowski@cern.ch>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, you may find one here:
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* http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
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* or you may search the http://www.gnu.org website for the version 2 license,
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* or you may write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#include <math/vector2d.h>
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#include <geometry/shape.h>
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#include <geometry/shape_line_chain.h>
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#include <geometry/shape_circle.h>
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#include <geometry/shape_rect.h>
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typedef VECTOR2I::extended_type ecoord;
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static inline bool Collide( const SHAPE_CIRCLE& aA, const SHAPE_CIRCLE& aB, int aClearance,
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bool aNeedMTV, VECTOR2I& aMTV )
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{
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ecoord min_dist = aClearance + aA.GetRadius() + aB.GetRadius();
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ecoord min_dist_sq = min_dist * min_dist;
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const VECTOR2I delta = aB.GetCenter() - aA.GetCenter();
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ecoord dist_sq = delta.SquaredEuclideanNorm();
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if( dist_sq >= min_dist_sq )
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return false;
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if( aNeedMTV )
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aMTV = delta.Resize( sqrt( abs( min_dist_sq - dist_sq ) ) + 1 );
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return true;
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}
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static inline bool Collide( const SHAPE_RECT& aA, const SHAPE_CIRCLE& aB, int aClearance,
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bool aNeedMTV, VECTOR2I& aMTV )
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{
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const VECTOR2I c = aB.GetCenter();
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const VECTOR2I p0 = aA.GetPosition();
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const VECTOR2I size = aA.GetSize();
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const ecoord r = aB.GetRadius();
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const ecoord min_dist = aClearance + r;
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const ecoord min_dist_sq = min_dist * min_dist;
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if( aA.BBox( 0 ).Contains( c ) )
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return true;
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const VECTOR2I vts[] =
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{
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VECTOR2I( p0.x, p0.y ),
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VECTOR2I( p0.x, p0.y + size.y ),
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VECTOR2I( p0.x + size.x, p0.y + size.y ),
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VECTOR2I( p0.x + size.x, p0.y ),
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VECTOR2I( p0.x, p0.y )
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};
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ecoord nearest_seg_dist_sq = VECTOR2I::ECOORD_MAX;
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VECTOR2I nearest;
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bool inside = c.x >= p0.x && c.x <= ( p0.x + size.x )
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&& c.y >= p0.y && c.y <= ( p0.y + size.y );
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if( !inside )
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{
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for( int i = 0; i < 4; i++ )
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{
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const SEG seg( vts[i], vts[i + 1] );
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ecoord dist_sq = seg.SquaredDistance( c );
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if( dist_sq < min_dist_sq )
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{
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if( !aNeedMTV )
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return true;
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else
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{
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nearest = seg.NearestPoint( c );
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nearest_seg_dist_sq = dist_sq;
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}
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}
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}
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}
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if( nearest_seg_dist_sq >= min_dist_sq && !inside )
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return false;
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VECTOR2I delta = c - nearest;
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if( !aNeedMTV )
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return true;
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if( inside )
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aMTV = -delta.Resize( sqrt( abs( r * r + nearest_seg_dist_sq ) + 1 ) );
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else
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aMTV = delta.Resize( sqrt( abs( r * r - nearest_seg_dist_sq ) + 1 ) );
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return true;
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}
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static inline bool Collide( const SHAPE_CIRCLE& aA, const SHAPE_LINE_CHAIN& aB, int aClearance,
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bool aNeedMTV, VECTOR2I& aMTV )
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{
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for( int s = 0; s < aB.SegmentCount(); s++ )
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{
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if( aA.Collide( aB.CSegment( s ), aClearance ) )
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return true;
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}
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return false;
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}
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static inline bool Collide( const SHAPE_LINE_CHAIN& aA, const SHAPE_LINE_CHAIN& aB, int aClearance,
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bool aNeedMTV, VECTOR2I& aMTV )
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{
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for( int i = 0; i < aB.SegmentCount(); i++ )
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if( aA.Collide( aB.CSegment( i ), aClearance ) )
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return true;
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return false;
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}
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static inline bool Collide( const SHAPE_RECT& aA, const SHAPE_LINE_CHAIN& aB, int aClearance,
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bool aNeedMTV, VECTOR2I& aMTV )
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{
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for( int s = 0; s < aB.SegmentCount(); s++ )
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{
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SEG seg = aB.CSegment( s );
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if( aA.Collide( seg, aClearance ) )
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return true;
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}
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return false;
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}
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bool CollideShapes( const SHAPE* aA, const SHAPE* aB, int aClearance,
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bool aNeedMTV, VECTOR2I& aMTV )
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{
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switch( aA->Type() )
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{
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case SH_RECT:
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switch( aB->Type() )
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{
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case SH_CIRCLE:
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return Collide( *static_cast<const SHAPE_RECT*>( aA ),
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*static_cast<const SHAPE_CIRCLE*>( aB ), aClearance, aNeedMTV, aMTV );
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case SH_LINE_CHAIN:
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return Collide( *static_cast<const SHAPE_RECT*>( aA ),
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*static_cast<const SHAPE_LINE_CHAIN*>( aB ), aClearance, aNeedMTV, aMTV );
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default:
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break;
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}
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break;
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case SH_CIRCLE:
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switch( aB->Type() )
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{
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case SH_RECT:
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return Collide( *static_cast<const SHAPE_RECT*>( aB ),
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*static_cast<const SHAPE_CIRCLE*>( aA ), aClearance, aNeedMTV, aMTV );
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case SH_CIRCLE:
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return Collide( *static_cast<const SHAPE_CIRCLE*>( aA ),
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*static_cast<const SHAPE_CIRCLE*>( aB ), aClearance, aNeedMTV, aMTV );
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case SH_LINE_CHAIN:
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return Collide( *static_cast<const SHAPE_CIRCLE*>( aA ),
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*static_cast<const SHAPE_LINE_CHAIN *>( aB ), aClearance, aNeedMTV, aMTV );
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default:
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break;
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}
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break;
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case SH_LINE_CHAIN:
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switch( aB->Type() )
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{
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case SH_RECT:
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return Collide( *static_cast<const SHAPE_RECT*>( aB ),
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*static_cast<const SHAPE_LINE_CHAIN*>( aA ), aClearance, aNeedMTV, aMTV );
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case SH_CIRCLE:
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return Collide( *static_cast<const SHAPE_CIRCLE*>( aB ),
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*static_cast<const SHAPE_LINE_CHAIN*>( aA ), aClearance, aNeedMTV, aMTV );
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case SH_LINE_CHAIN:
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return Collide( *static_cast<const SHAPE_LINE_CHAIN*>( aA ),
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*static_cast<const SHAPE_LINE_CHAIN*>( aB ), aClearance, aNeedMTV, aMTV );
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default:
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break;
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}
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break;
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default:
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break;
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}
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assert( 0 ); // unsupported_collision
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return false;
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}
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bool SHAPE::Collide( const SHAPE* aShape, int aClerance, VECTOR2I& aMTV ) const
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{
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return CollideShapes( this, aShape, aClerance, true, aMTV );
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}
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bool SHAPE::Collide( const SHAPE* aShape, int aClerance ) const
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{
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VECTOR2I dummy;
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return CollideShapes( this, aShape, aClerance, false, dummy );
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}
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