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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 09:06:44 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 09:06:44 +0000
commited5640d8b587fbcfed7dd7967f3de04b37a76f26 (patch)
tree7a5f7c6c9d02226d7471cb3cc8fbbf631b415303 /tools/source/generic/line.cxx
parentInitial commit. (diff)
downloadlibreoffice-ed5640d8b587fbcfed7dd7967f3de04b37a76f26.tar.xz
libreoffice-ed5640d8b587fbcfed7dd7967f3de04b37a76f26.zip
Adding upstream version 4:7.4.7.upstream/4%7.4.7upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r--tools/source/generic/line.cxx140
1 files changed, 140 insertions, 0 deletions
diff --git a/tools/source/generic/line.cxx b/tools/source/generic/line.cxx
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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed
+ * with this work for additional information regarding copyright
+ * ownership. The ASF licenses this file to you under the Apache
+ * License, Version 2.0 (the "License"); you may not use this file
+ * except in compliance with the License. You may obtain a copy of
+ * the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <tools/line.hxx>
+#include <tools/helpers.hxx>
+
+#include <cmath>
+
+namespace tools
+{
+
+double Line::GetLength() const
+{
+ return hypot( maStart.X() - maEnd.X(), maStart.Y() - maEnd.Y() );
+}
+
+bool Line::Intersection( const Line& rLine, Point& rIntersection ) const
+{
+ double fX, fY;
+ bool bRet;
+
+ if( Intersection( rLine, fX, fY ) )
+ {
+ rIntersection.setX( FRound( fX ) );
+ rIntersection.setY( FRound( fY ) );
+ bRet = true;
+ }
+ else
+ bRet = false;
+
+ return bRet;
+}
+
+bool Line::Intersection( const tools::Line& rLine, double& rIntersectionX, double& rIntersectionY ) const
+{
+ const double fAx = maEnd.X() - maStart.X();
+ const double fAy = maEnd.Y() - maStart.Y();
+ const double fBx = rLine.maStart.X() - rLine.maEnd.X();
+ const double fBy = rLine.maStart.Y() - rLine.maEnd.Y();
+ const double fDen = fAy * fBx - fAx * fBy;
+ bool bOk = false;
+
+ if( fDen != 0. )
+ {
+ const double fCx = maStart.X() - rLine.maStart.X();
+ const double fCy = maStart.Y() - rLine.maStart.Y();
+ const double fA = fBy * fCx - fBx * fCy;
+ const bool bGreater = ( fDen > 0. );
+
+ bOk = true;
+
+ if ( bGreater )
+ {
+ if ( ( fA < 0. ) || ( fA > fDen ) )
+ bOk = false;
+ }
+ else if ( ( fA > 0. ) || ( fA < fDen ) )
+ bOk = false;
+
+ if ( bOk )
+ {
+ const double fB = fAx * fCy - fAy * fCx;
+
+ if ( bGreater )
+ {
+ if ( ( fB < 0. ) || ( fB > fDen ) )
+ bOk = false;
+ }
+ else if ( ( fB > 0. ) || ( fB < fDen ) )
+ bOk = false;
+
+ if( bOk )
+ {
+ const double fAlpha = fA / fDen;
+
+ rIntersectionX = ( maStart.X() + fAlpha * fAx );
+ rIntersectionY = ( maStart.Y() + fAlpha * fAy );
+ }
+ }
+ }
+
+ return bOk;
+}
+
+double Line::GetDistance( const double& rPtX, const double& rPtY ) const
+{
+ double fDist;
+
+ if( maStart != maEnd )
+ {
+ const double fDistX = maEnd.X() - maStart.X();
+ const double fDistY = maEnd.Y() - maStart.Y();
+ const double fACX = maStart.X() - rPtX;
+ const double fACY = maStart.Y() - rPtY;
+ const double fL2 = fDistX * fDistX + fDistY * fDistY;
+ const double fR = ( fACY * -fDistY - fACX * fDistX ) / fL2;
+ const double fS = ( fACY * fDistX - fACX * fDistY ) / fL2;
+
+ if( fR < 0.0 )
+ {
+ fDist = hypot( maStart.X() - rPtX, maStart.Y() - rPtY );
+
+ if( fS < 0.0 )
+ fDist *= -1.0;
+ }
+ else if( fR <= 1.0 )
+ fDist = fS * sqrt( fL2 );
+ else
+ {
+ fDist = hypot( maEnd.X() - rPtX, maEnd.Y() - rPtY );
+
+ if( fS < 0.0 )
+ fDist *= -1.0;
+ }
+ }
+ else
+ fDist = hypot( maStart.X() - rPtX, maStart.Y() - rPtY );
+
+ return fDist;
+}
+
+} //namespace tools
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */