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qquicktargetdirection.cpp

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1/****************************************************************************-
2**-
3** Copyright (C) 2016 The Qt Company Ltd.-
4** Contact: https://www.qt.io/licensing/-
5**-
6** This file is part of the QtQuick module of the Qt Toolkit.-
7**-
8** $QT_BEGIN_LICENSE:LGPL$-
9** Commercial License Usage-
10** Licensees holding valid commercial Qt licenses may use this file in-
11** accordance with the commercial license agreement provided with the-
12** Software or, alternatively, in accordance with the terms contained in-
13** a written agreement between you and The Qt Company. For licensing terms-
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15** information use the contact form at https://www.qt.io/contact-us.-
16**-
17** GNU Lesser General Public License Usage-
18** Alternatively, this file may be used under the terms of the GNU Lesser-
19** General Public License version 3 as published by the Free Software-
20** Foundation and appearing in the file LICENSE.LGPL3 included in the-
21** packaging of this file. Please review the following information to-
22** ensure the GNU Lesser General Public License version 3 requirements-
23** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.-
24**-
25** GNU General Public License Usage-
26** Alternatively, this file may be used under the terms of the GNU-
27** General Public License version 2.0 or (at your option) the GNU General-
28** Public license version 3 or any later version approved by the KDE Free-
29** Qt Foundation. The licenses are as published by the Free Software-
30** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3-
31** included in the packaging of this file. Please review the following-
32** information to ensure the GNU General Public License requirements will-
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35**-
36** $QT_END_LICENSE$-
37**-
38****************************************************************************/-
39-
40#include "qquicktargetdirection_p.h"-
41#include "qquickparticleemitter_p.h"-
42#include <cmath>-
43#include <QDebug>-
44#include <QRandomGenerator>-
45-
46QT_BEGIN_NAMESPACE-
47/*!-
48 \qmltype TargetDirection-
49 \instantiates QQuickTargetDirection-
50 \inqmlmodule QtQuick.Particles-
51 \ingroup qtquick-particles-
52 \inherits Direction-
53 \brief For specifying a direction towards the target point.-
54-
55*/-
56/*!-
57 \qmlproperty real QtQuick.Particles::TargetDirection::targetX-
58*/-
59/*!-
60 \qmlproperty real QtQuick.Particles::TargetDirection::targetY-
61*/-
62/*!-
63 \qmlproperty Item QtQuick.Particles::TargetDirection::targetItem-
64 If specified, this will take precedence over targetX and targetY.-
65 The targeted point will be the center of the specified Item-
66*/-
67/*!-
68 \qmlproperty real QtQuick.Particles::TargetDirection::targetVariation-
69*/-
70/*!-
71 \qmlproperty real QtQuick.Particles::TargetDirection::magnitude-
72*/-
73/*!-
74 \qmlproperty real QtQuick.Particles::TargetDirection::magnitudeVariation-
75*/-
76/*!-
77 \qmlproperty bool QtQuick.Particles::TargetDirection::proportionalMagnitude-
78-
79 If true, then the value of magnitude and magnitudeVariation shall be interpreted as multiples-
80 of the distance between the source point and the target point, per second.-
81-
82 If false(default), then the value of magnitude and magnitudeVariation shall be interpreted as-
83 pixels per second.-
84*/-
85-
86QQuickTargetDirection::QQuickTargetDirection(QObject *parent) :-
87 QQuickDirection(parent)-
88 , m_targetX(0)-
89 , m_targetY(0)-
90 , m_targetVariation(0)-
91 , m_proportionalMagnitude(false)-
92 , m_magnitude(0)-
93 , m_magnitudeVariation(0)-
94 , m_targetItem(nullptr)-
95{-
96}
executed 16 times by 2 tests: end of block
Executed by:
  • tst_examples
  • tst_qquicktargetdirection
16
97-
98QPointF QQuickTargetDirection::sample(const QPointF &from)-
99{-
100 //###This approach loses interpolating the last position of the target (like we could with the emitter) is it worthwhile?-
101 QPointF ret;-
102 qreal targetX;-
103 qreal targetY;-
104 if (m_targetItem){
m_targetItemDescription
TRUEevaluated 1216 times by 1 test
Evaluated by:
  • tst_qquicktargetdirection
FALSEnever evaluated
0-1216
105 QQuickParticleEmitter* parentEmitter = qobject_cast<QQuickParticleEmitter*>(parent());-
106 targetX = m_targetItem->width()/2;-
107 targetY = m_targetItem->height()/2;-
108 if (!parentEmitter){
!parentEmitterDescription
TRUEnever evaluated
FALSEevaluated 1216 times by 1 test
Evaluated by:
  • tst_qquicktargetdirection
0-1216
109 qWarning() << "Directed vector is not a child of the emitter. Mapping of target item coordinates may fail.";-
110 targetX += m_targetItem->x();-
111 targetY += m_targetItem->y();-
112 }else{
never executed: end of block
0
113 ret = parentEmitter->mapFromItem(m_targetItem, QPointF(targetX, targetY));-
114 targetX = ret.x();-
115 targetY = ret.y();-
116 }
executed 1216 times by 1 test: end of block
Executed by:
  • tst_qquicktargetdirection
1216
117 }else{-
118 targetX = m_targetX;-
119 targetY = m_targetY;-
120 }
never executed: end of block
0
121 targetX += 0 - from.x() - m_targetVariation + QRandomGenerator::global()->generateDouble() * m_targetVariation*2;-
122 targetY += 0 - from.y() - m_targetVariation + QRandomGenerator::global()->generateDouble() * m_targetVariation*2;-
123 qreal theta = std::atan2(targetY, targetX);-
124 qreal mag = m_magnitude + QRandomGenerator::global()->generateDouble() * m_magnitudeVariation * 2 - m_magnitudeVariation;-
125 if (m_proportionalMagnitude)
m_proportionalMagnitudeDescription
TRUEevaluated 1216 times by 1 test
Evaluated by:
  • tst_qquicktargetdirection
FALSEnever evaluated
0-1216
126 mag *= std::sqrt(targetX * targetX + targetY * targetY);
executed 1216 times by 1 test: mag *= std::sqrt(targetX * targetX + targetY * targetY);
Executed by:
  • tst_qquicktargetdirection
1216
127 ret.setX(mag * std::cos(theta));-
128 ret.setY(mag * std::sin(theta));-
129 return ret;
executed 1216 times by 1 test: return ret;
Executed by:
  • tst_qquicktargetdirection
1216
130}-
131-
132QT_END_NAMESPACE-
133-
134#include "moc_qquicktargetdirection_p.cpp"-
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