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qquickage.cpp

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

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

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

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

39 -

40 #include "qquickage_p.h" -

41 #include "qquickparticleemitter_p.h" -

42 QT_BEGIN_NAMESPACE -

43 /*! -

44 \qmltype Age -

45 \instantiates QQuickAgeAffector -

46 \inqmlmodule QtQuick.Particles -

47 \inherits Affector -

48 \brief For altering particle ages. -

49 \ingroup qtquick-particles -

50 -

51 The Age affector allows you to alter where the particle is in its lifecycle. Common uses -

52 are to expire particles prematurely, possibly giving them time to animate out. -

53 -

54 The Age affector is also sometimes known as a 'Kill' affector, because with the default -

55 parameters it will immediately expire all particles which it affects. -

56 -

57 The Age affector only applies to particles which are still alive. -

58 */ -

59 /*! -

60 \qmlproperty int QtQuick.Particles::Age::lifeLeft -

61 -

62 The amount of life to set the particle to have. Affected particles -

63 will advance to a point in their life where they will have this many -

64 milliseconds left to live. -

65 */ -

66 -

67 /*! -

68 \qmlproperty bool QtQuick.Particles::Age::advancePosition -

69 -

70 advancePosition determines whether position, veclocity and acceleration are included in -

71 the simulated aging done by the affector. If advancePosition is false, -

72 then the position, velocity and acceleration will remain the same and only -

73 other attributes (such as opacity) will advance in the simulation to where -

74 it would normally be for that point in the particle's life. With advancePosition set to -

75 true the position, velocity and acceleration will also advance to where it would -

76 normally be by that point in the particle's life, making it advance its position -

77 on screen. -

78 -

79 Default value is true. -

80 */ -

81 -

82 QQuickAgeAffector::QQuickAgeAffector(QQuickItem *parent) : -

83 QQuickParticleAffector(parent), m_lifeLeft(0), m_advancePosition(true) -

84 { -

}

executed 14 times by 2 tests: end of block

Executed by:

tst_examples
tst_qquickage

86 -

87 -

88 bool QQuickAgeAffector::affectParticle(QQuickParticleData *d, qreal dt) -

89 { -

90 Q_UNUSED(dt); -

if (d->stillAlive(m_system)){

d->stillAlive(m_system)	Description
TRUE	evaluated 29968 times by 1 test Evaluated by: tst_qquickage
FALSE	never evaluated

0-29968

92 float curT = m_system->timeInt / 1000.0f; -

93 float ttl = m_lifeLeft / 1000.0f; -

if (!m_advancePosition && ttl > 0){

!m_advancePosition	Description
TRUE	evaluated 1248 times by 1 test Evaluated by: tst_qquickage
FALSE	evaluated 28720 times by 1 test Evaluated by: tst_qquickage

ttl > 0	Description
TRUE	evaluated 1248 times by 1 test Evaluated by: tst_qquickage
FALSE	never evaluated

0-28720

95 float x = d->curX(m_system); -

96 float vx = d->curVX(m_system); -

97 float ax = d->curAX(); -

98 float y = d->curY(m_system); -

99 float vy = d->curVY(m_system); -

100 float ay = d->curAY(); -

101 d->t = curT - (d->lifeSpan - ttl); -

102 d->setInstantaneousX(x, m_system); -

103 d->setInstantaneousVX(vx, m_system); -

104 d->setInstantaneousAX(ax, m_system); -

105 d->setInstantaneousY(y, m_system); -

106 d->setInstantaneousVY(vy, m_system); -

107 d->setInstantaneousAY(ay, m_system); -

108

} else {

executed 1248 times by 1 test: end of block

Executed by:

tst_qquickage

1248

109 d->t = curT - (d->lifeSpan - ttl); -

110

}

executed 28720 times by 1 test: end of block

Executed by:

tst_qquickage

28720

111

return true;

executed 29968 times by 1 test: return true;

Executed by:

tst_qquickage

29968

112 } -

113

return false;

never executed: return false;

114 } -

115 QT_END_NAMESPACE -

116 -

117 #include "moc_qquickage_p.cpp" -

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