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80 lines
2.6 KiB
C++
80 lines
2.6 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 The KiCad Developers, see AUTHORS.txt for contributors.
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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 "preview_items/item_drawing_utils.h"
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#include <array>
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#include <geometry/geometry_utils.h>
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#include <geometry/seg.h>
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using namespace KIGFX;
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void KIGFX::DrawCross( GAL& aGal, const VECTOR2I& aPosition, int aSize )
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{
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const int size = aSize / 2;
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aGal.DrawLine( aPosition - VECTOR2I( size, 0 ), aPosition + VECTOR2I( size, 0 ) );
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aGal.DrawLine( aPosition - VECTOR2I( 0, size ), aPosition + VECTOR2I( 0, size ) );
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}
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void KIGFX::DrawDashedLine( GAL& aGal, const SEG& aSeg, double aDashSize )
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{
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const std::array<double, 2> strokes = { aDashSize, aDashSize / 2 };
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const double dashCycleLen = strokes[0] + strokes[1];
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// The dash cycle length must be at least 1 pixel.
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wxASSERT( dashCycleLen * aGal.GetWorldScale() > 1 );
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const BOX2I clip = BOX2I::ByCorners( aSeg.A, aSeg.B );
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const double theta = atan2( aSeg.B.y - aSeg.A.y, aSeg.B.x - aSeg.A.x );
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const VECTOR2D cycleVec{
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dashCycleLen * cos( theta ),
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dashCycleLen * sin( theta ),
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};
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const VECTOR2D dashVec{
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strokes[0] * cos( theta ),
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strokes[0] * sin( theta ),
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};
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unsigned cyclei = 0;
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while( true )
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{
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const VECTOR2D dashStart = aSeg.A + cycleVec * cyclei;
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const VECTOR2D dashEnd = dashStart + dashVec;
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// Drawing each segment can be done rounded to ints.
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SEG dashSeg{ KiROUND( dashStart ), KiROUND( dashEnd ) };
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if( ClipLine( &clip, dashSeg.A.x, dashSeg.A.y, dashSeg.B.x, dashSeg.B.y ) )
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break;
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aGal.DrawLine( dashSeg.A, dashSeg.B );
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++cyclei;
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}
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}
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