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qquickgravity.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-
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22** ensure the GNU Lesser General Public License version 3 requirements-
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37**-
38****************************************************************************/-
39-
40#include <QtQml/qqmlinfo.h>-
41#include "qquickgravity_p.h"-
42#include <cmath>-
43QT_BEGIN_NAMESPACE-
44const qreal CONV = 0.017453292520444443;-
45/*!-
46 \qmltype Gravity-
47 \instantiates QQuickGravityAffector-
48 \inqmlmodule QtQuick.Particles-
49 \ingroup qtquick-particles-
50 \inherits Affector-
51 \brief For applying acceleration in an angle.-
52-
53 This element will accelerate all affected particles to a vector of-
54 the specified magnitude in the specified angle. If the angle and acceleration do-
55 not vary, it is more efficient to set the specified acceleration on the Emitter.-
56-
57 This element models the gravity of a massive object whose center of-
58 gravity is far away (and thus the gravitational pull is effectively constant-
59 across the scene). To model the gravity of an object near or inside the scene,-
60 use PointAttractor.-
61*/-
62-
63/*!-
64 \qmlproperty real QtQuick.Particles::Gravity::magnitude-
65-
66 Pixels per second that objects will be accelerated by.-
67*/-
68void QQuickGravityAffector::setMagnitude(qreal arg)-
69{-
70 if (m_magnitude != arg) {
m_magnitude != argDescription
TRUEevaluated 4 times by 2 tests
Evaluated by:
  • tst_examples
  • tst_qquickgravity
FALSEnever evaluated
0-4
71 m_magnitude = arg;-
72 m_needRecalc = true;-
73 emit magnitudeChanged(arg);-
74 }
executed 4 times by 2 tests: end of block
Executed by:
  • tst_examples
  • tst_qquickgravity
4
75}
executed 4 times by 2 tests: end of block
Executed by:
  • tst_examples
  • tst_qquickgravity
4
76-
77qreal QQuickGravityAffector::magnitude() const-
78{-
79 return m_magnitude;
never executed: return m_magnitude;
0
80}-
81-
82-
83/*!-
84 \qmlproperty real QtQuick.Particles::Gravity::acceleration-
85 \deprecated-
86-
87 \warning The name for this property has changed to magnitude, use it instead.-
88*/-
89void QQuickGravityAffector::setAcceleration(qreal arg)-
90{-
91 qmlWarning(this) << "The acceleration property is deprecated. Please use magnitude instead.";-
92 setMagnitude(arg);-
93}
executed 2 times by 1 test: end of block
Executed by:
  • tst_qquickgravity
2
94-
95/*!-
96 \qmlproperty real QtQuick.Particles::Gravity::angle-
97-
98 Angle of acceleration.-
99*/-
100void QQuickGravityAffector::setAngle(qreal arg)-
101{-
102 if (m_angle != arg) {
m_angle != argDescription
TRUEevaluated 2 times by 1 test
Evaluated by:
  • tst_qquickgravity
FALSEevaluated 2 times by 1 test
Evaluated by:
  • tst_examples
2
103 m_angle = arg;-
104 m_needRecalc = true;-
105 emit angleChanged(arg);-
106 }
executed 2 times by 1 test: end of block
Executed by:
  • tst_qquickgravity
2
107}
executed 4 times by 2 tests: end of block
Executed by:
  • tst_examples
  • tst_qquickgravity
4
108-
109qreal QQuickGravityAffector::angle() const-
110{-
111 return m_angle;
never executed: return m_angle;
0
112}-
113-
114QQuickGravityAffector::QQuickGravityAffector(QQuickItem *parent) :-
115 QQuickParticleAffector(parent), m_magnitude(-10), m_angle(90), m_needRecalc(true)-
116{-
117}
executed 4 times by 2 tests: end of block
Executed by:
  • tst_examples
  • tst_qquickgravity
4
118-
119bool QQuickGravityAffector::affectParticle(QQuickParticleData *d, qreal dt)-
120{-
121 if (!m_magnitude)
!m_magnitudeDescription
TRUEnever evaluated
FALSEevaluated 22348 times by 1 test
Evaluated by:
  • tst_qquickgravity
0-22348
122 return false;
never executed: return false;
0
123 if (m_needRecalc) {
m_needRecalcDescription
TRUEevaluated 2 times by 1 test
Evaluated by:
  • tst_qquickgravity
FALSEevaluated 22346 times by 1 test
Evaluated by:
  • tst_qquickgravity
2-22346
124 m_needRecalc = false;-
125 m_dx = m_magnitude * std::cos(m_angle * CONV);-
126 m_dy = m_magnitude * std::sin(m_angle * CONV);-
127 }
executed 2 times by 1 test: end of block
Executed by:
  • tst_qquickgravity
2
128-
129 d->setInstantaneousVX(d->curVX(m_system) + m_dx*dt, m_system);-
130 d->setInstantaneousVY(d->curVY(m_system) + m_dy*dt, m_system);-
131 return true;
executed 22348 times by 1 test: return true;
Executed by:
  • tst_qquickgravity
22348
132}-
133-
134-
135-
136QT_END_NAMESPACE-
137-
138#include "moc_qquickgravity_p.cpp"-
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