anchor.cpp
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上传日期:2020-07-06
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文件大小:3k
源码类别:
midi
开发平台:
Unix_Linux
- /*****************************************************************************
- * anchor.cpp
- *****************************************************************************
- * Copyright (C) 2003 the VideoLAN team
- * $Id: 24e80516c0c9a35badedc17484955d8d3a619cde $
- *
- * Authors: Cyril Deguet <asmax@via.ecp.fr>
- * Olivier Teulière <ipkiss@via.ecp.fr>
- *
- * 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, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
- *****************************************************************************/
- #include "anchor.hpp"
- bool Anchor::isHanging( const Anchor &rOther ) const
- {
- if( m_priority <= rOther.m_priority )
- return false;
- // Compute delta coordinates between anchors, since the Bezier class
- // uses coordinates relative to (0;0)
- int deltaX = getXPosAbs() - rOther.getXPosAbs();
- int deltaY = getYPosAbs() - rOther.getYPosAbs();
- // One of the anchors (at least) must be a point, else it has no meaning
- return (isPoint() && rOther.m_rCurve.getMinDist( deltaX, deltaY ) == 0) ||
- (rOther.isPoint() && m_rCurve.getMinDist( -deltaX, -deltaY ) == 0);
- }
- bool Anchor::canHang( const Anchor &rOther, int &xOffset, int &yOffset ) const
- {
- int deltaX = getXPosAbs() - (rOther.getXPosAbs() + xOffset);
- int deltaY = getYPosAbs() - (rOther.getYPosAbs() + yOffset);
- // One of the anchors (at least) must be a point, else it has no meaning
- if( (isPoint() && rOther.m_rCurve.getMinDist( deltaX, deltaY ) < m_range) )
- {
- // Compute the coordinates of the nearest point of the curve
- int xx, yy;
- float p = rOther.m_rCurve.getNearestPercent( deltaX, deltaY );
- rOther.m_rCurve.getPoint( p, xx, yy );
- xOffset = getXPosAbs() - (rOther.getXPosAbs() + xx);
- yOffset = getYPosAbs() - (rOther.getYPosAbs() + yy);
- return true;
- }
- else if( (rOther.isPoint() &&
- m_rCurve.getMinDist( -deltaX, -deltaY ) < m_range) )
- {
- // Compute the coordinates of the nearest point of the curve
- int xx, yy;
- float p = m_rCurve.getNearestPercent( -deltaX, -deltaY );
- m_rCurve.getPoint( p, xx, yy );
- xOffset = (getXPosAbs() + xx) - rOther.getXPosAbs();
- yOffset = (getYPosAbs() + yy) - rOther.getYPosAbs();
- return true;
- }
- else
- {
- return false;
- }
- }