File indexing completed on 2024-06-16 04:15:51
0001 /* 0002 * SPDX-FileCopyrightText: 2008 Cyrille Berger <cberger@cberger.net> 0003 * 0004 * SPDX-License-Identifier: LGPL-2.0-or-later 0005 */ 0006 0007 #include "Ruler.h" 0008 0009 Ruler::Ruler() : p1(QPointF(10, 10)), p2(QPointF(100, 190)) 0010 { 0011 } 0012 0013 Ruler::~Ruler() 0014 { 0015 } 0016 0017 QPointF Ruler::project(const QPointF& pt) 0018 { 0019 double x1 = p1.x(); 0020 double y1 = p1.y(); 0021 double x2 = p2.x(); 0022 double y2 = p2.y(); 0023 double a1 = (y2 - y1) / (x2 - x1); 0024 double b1 = y1 - x1 * a1; 0025 double a2 = (x2 - x1) / (y1 - y2); 0026 double b2 = pt.y() - a2 * pt.x(); 0027 double xm = (b2 - b1) / (a1 - a2); 0028 return QPointF(xm, xm * a1 + b1); 0029 } 0030 0031 const QPointF& Ruler::point1() const 0032 { 0033 return p1; 0034 } 0035 0036 const QPointF& Ruler::point2() const 0037 { 0038 return p2; 0039 }