1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79
|
/*
* This program source code file is part of KICAD, a free EDA CAD application.
*
* Copyright The 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 "preview_items/item_drawing_utils.h"
#include <array>
#include <geometry/geometry_utils.h>
#include <geometry/seg.h>
using namespace KIGFX;
void KIGFX::DrawCross( GAL& aGal, const VECTOR2I& aPosition, int aSize )
{
const int size = aSize / 2;
aGal.DrawLine( aPosition - VECTOR2I( size, 0 ), aPosition + VECTOR2I( size, 0 ) );
aGal.DrawLine( aPosition - VECTOR2I( 0, size ), aPosition + VECTOR2I( 0, size ) );
}
void KIGFX::DrawDashedLine( GAL& aGal, const SEG& aSeg, double aDashSize )
{
const std::array<double, 2> strokes = { aDashSize, aDashSize / 2 };
const double dashCycleLen = strokes[0] + strokes[1];
// The dash cycle length must be at least 1 pixel.
wxASSERT( dashCycleLen * aGal.GetWorldScale() > 1 );
const BOX2I clip = BOX2I::ByCorners( aSeg.A, aSeg.B );
const double theta = atan2( aSeg.B.y - aSeg.A.y, aSeg.B.x - aSeg.A.x );
const VECTOR2D cycleVec{
dashCycleLen * cos( theta ),
dashCycleLen * sin( theta ),
};
const VECTOR2D dashVec{
strokes[0] * cos( theta ),
strokes[0] * sin( theta ),
};
unsigned cyclei = 0;
while( true )
{
const VECTOR2D dashStart = aSeg.A + cycleVec * cyclei;
const VECTOR2D dashEnd = dashStart + dashVec;
// Drawing each segment can be done rounded to ints.
SEG dashSeg{ KiROUND( dashStart ), KiROUND( dashEnd ) };
if( ClipLine( &clip, dashSeg.A.x, dashSeg.A.y, dashSeg.B.x, dashSeg.B.y ) )
break;
aGal.DrawLine( dashSeg.A, dashSeg.B );
++cyclei;
}
}
|