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qquickgravity.cpp

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1 /**************************************************************************** -

2 ** -

4 ** Contact: https://www.qt.io/licensing/ -

5 ** -

6 ** This file is part of the QtQuick module of the Qt Toolkit. -

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8 ** $QT_BEGIN_LICENSE:LGPL$ -

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21 ** packaging of this file. Please review the following information to -

22 ** ensure the GNU Lesser General Public License version 3 requirements -

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25 ** GNU General Public License Usage -

26 ** Alternatively, this file may be used under the terms of the GNU -

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36 ** $QT_END_LICENSE$ -

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38 ****************************************************************************/ -

39 -

40 #include <QtQml/qqmlinfo.h> -

41 #include "qquickgravity_p.h" -

42 #include <cmath> -

43 QT_BEGIN_NAMESPACE -

44 const 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 */ -

68 void QQuickGravityAffector::setMagnitude(qreal arg) -

69 { -

if (m_magnitude != arg) {

m_magnitude != arg	Description
TRUE	evaluated 4 times by 2 tests Evaluated by: tst_examples tst_qquickgravity
FALSE	never evaluated

0-4

71 m_magnitude = arg; -

72 m_needRecalc = true; -

73 emit magnitudeChanged(arg); -

}

executed 4 times by 2 tests: end of block

Executed by:

tst_examples
tst_qquickgravity

}

executed 4 times by 2 tests: end of block

Executed by:

tst_examples
tst_qquickgravity

76 -

77 qreal QQuickGravityAffector::magnitude() const -

78 { -

return m_magnitude;

never executed: return m_magnitude;

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 */ -

89 void QQuickGravityAffector::setAcceleration(qreal arg) -

90 { -

91 qmlWarning(this) << "The acceleration property is deprecated. Please use magnitude instead."; -

92 setMagnitude(arg); -

}

executed 2 times by 1 test: end of block

Executed by:

tst_qquickgravity

94 -

95 /*! -

96 \qmlproperty real QtQuick.Particles::Gravity::angle -

97 -

98 Angle of acceleration. -

99 */ -

100 void QQuickGravityAffector::setAngle(qreal arg) -

101 { -

102

if (m_angle != arg) {

m_angle != arg	Description
TRUE	evaluated 2 times by 1 test Evaluated by: tst_qquickgravity
FALSE	evaluated 2 times by 1 test Evaluated by: tst_examples

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

107

}

executed 4 times by 2 tests: end of block

Executed by:

tst_examples
tst_qquickgravity

108 -

109 qreal QQuickGravityAffector::angle() const -

110 { -

111

return m_angle;

never executed: return m_angle;

112 } -

113 -

114 QQuickGravityAffector::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

118 -

119 bool QQuickGravityAffector::affectParticle(QQuickParticleData *d, qreal dt) -

120 { -

121

if (!m_magnitude)

!m_magnitude	Description
TRUE	never evaluated
FALSE	evaluated 22348 times by 1 test Evaluated by: tst_qquickgravity

0-22348

122

return false;

never executed: return false;

123

if (m_needRecalc) {

m_needRecalc	Description
TRUE	evaluated 2 times by 1 test Evaluated by: tst_qquickgravity
FALSE	evaluated 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

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 -

136 QT_END_NAMESPACE -

137 -

138 #include "moc_qquickgravity_p.cpp" -

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