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qquickturbulence.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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16**-
17** GNU Lesser General Public License Usage-
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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-
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-
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38****************************************************************************/-
39-
40#include "qquickturbulence_p.h"-
41#include "qquickparticlepainter_p.h"//TODO: Why was this needed again?-
42#include <cmath>-
43#include <cstdlib>-
44#include <QDebug>-
45#include <QQmlFile>-
46QT_BEGIN_NAMESPACE-
47-
48/*!-
49 \qmltype Turbulence-
50 \instantiates QQuickTurbulenceAffector-
51 \inqmlmodule QtQuick.Particles-
52 \ingroup qtquick-particles-
53 \inherits Affector-
54 \brief Provides fluid-like forces from a noise image.-
55-
56 The Turbulence Element scales the noise source over the area it affects,-
57 and uses the curl of that source to generate force vectors.-
58-
59 Turbulence requires a fixed size. Unlike other affectors, a 0x0 Turbulence element-
60 will affect no particles.-
61-
62 The source should be relatively smooth black and white noise, such as perlin noise.-
63*/-
64/*!-
65 \qmlproperty real QtQuick.Particles::Turbulence::strength-
66-
67 The magnitude of the velocity vector at any point varies between zero and-
68 the square root of two. It will then be multiplied by strength to get the-
69 velocity per second for the particles affected by the turbulence.-
70*/-
71/*!-
72 \qmlproperty url QtQuick.Particles::Turbulence::noiseSource-
73-
74 The source image to generate the turbulence from. It will be scaled to the size of the element,-
75 so equal or larger sizes will give better results. Tweaking this image is the only way to tweak-
76 behavior such as where vortices are or how many exist.-
77-
78 The source should be a relatively smooth black and white noise image, such as perlin noise.-
79 A default image will be used if none is provided.-
80*/-
81-
82QQuickTurbulenceAffector::QQuickTurbulenceAffector(QQuickItem *parent) :-
83 QQuickParticleAffector(parent),-
84 m_strength(10), m_lastT(0), m_gridSize(0), m_field(nullptr), m_vectorField(nullptr), m_inited(false)-
85{-
86}
executed 8 times by 2 tests: end of block
Executed by:
  • tst_examples
  • tst_qquickturbulence
8
87-
88void QQuickTurbulenceAffector::geometryChanged(const QRectF &, const QRectF &)-
89{-
90 initializeGrid();-
91}
executed 16 times by 2 tests: end of block
Executed by:
  • tst_examples
  • tst_qquickturbulence
16
92-
93QQuickTurbulenceAffector::~QQuickTurbulenceAffector()-
94{-
95 if (m_field) {
m_fieldDescription
TRUEevaluated 2 times by 1 test
Evaluated by:
  • tst_qquickturbulence
FALSEevaluated 6 times by 1 test
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  • tst_examples
2-6
96 for (int i=0; i<m_gridSize; i++)
i<m_gridSizeDescription
TRUEevaluated 640 times by 1 test
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  • tst_qquickturbulence
FALSEevaluated 2 times by 1 test
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  • tst_qquickturbulence
2-640
97 free(m_field[i]);
executed 640 times by 1 test: free(m_field[i]);
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640
98 free(m_field);-
99 }
executed 2 times by 1 test: end of block
Executed by:
  • tst_qquickturbulence
2
100 if (m_vectorField) {
m_vectorFieldDescription
TRUEevaluated 2 times by 1 test
Evaluated by:
  • tst_qquickturbulence
FALSEevaluated 6 times by 1 test
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  • tst_examples
2-6
101 for (int i=0; i<m_gridSize; i++)
i<m_gridSizeDescription
TRUEevaluated 640 times by 1 test
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  • tst_qquickturbulence
FALSEevaluated 2 times by 1 test
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  • tst_qquickturbulence
2-640
102 free(m_vectorField[i]);
executed 640 times by 1 test: free(m_vectorField[i]);
Executed by:
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103 free(m_vectorField);-
104 }
executed 2 times by 1 test: end of block
Executed by:
  • tst_qquickturbulence
2
105}
executed 8 times by 2 tests: end of block
Executed by:
  • tst_examples
  • tst_qquickturbulence
8
106-
107void QQuickTurbulenceAffector::initializeGrid()-
108{-
109 if (!m_inited)
!m_initedDescription
TRUEevaluated 16 times by 2 tests
Evaluated by:
  • tst_examples
  • tst_qquickturbulence
FALSEevaluated 2 times by 1 test
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2-16
110 return;
executed 16 times by 2 tests: return;
Executed by:
  • tst_examples
  • tst_qquickturbulence
16
111-
112 int arg = qMax(width(), height());-
113 if (m_gridSize != arg) {
m_gridSize != argDescription
TRUEevaluated 2 times by 1 test
Evaluated by:
  • tst_qquickturbulence
FALSEnever evaluated
0-2
114 if (m_field){ //deallocate and then reallocate grid
m_fieldDescription
TRUEnever evaluated
FALSEevaluated 2 times by 1 test
Evaluated by:
  • tst_qquickturbulence
0-2
115 for (int i=0; i<m_gridSize; i++)
i<m_gridSizeDescription
TRUEnever evaluated
FALSEnever evaluated
0
116 free(m_field[i]);
never executed: free(m_field[i]);
0
117 free(m_field);-
118 }
never executed: end of block
0
119 if (m_vectorField) {
m_vectorFieldDescription
TRUEnever evaluated
FALSEevaluated 2 times by 1 test
Evaluated by:
  • tst_qquickturbulence
0-2
120 for (int i=0; i<m_gridSize; i++)
i<m_gridSizeDescription
TRUEnever evaluated
FALSEnever evaluated
0
121 free(m_vectorField[i]);
never executed: free(m_vectorField[i]);
0
122 free(m_vectorField);-
123 }
never executed: end of block
0
124 m_gridSize = arg;-
125 }
executed 2 times by 1 test: end of block
Executed by:
  • tst_qquickturbulence
2
126-
127 m_field = (qreal**)malloc(m_gridSize * sizeof(qreal*));-
128 for (int i=0; i<m_gridSize; i++)
i<m_gridSizeDescription
TRUEevaluated 640 times by 1 test
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FALSEevaluated 2 times by 1 test
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2-640
129 m_field[i] = (qreal*)malloc(m_gridSize * sizeof(qreal));
executed 640 times by 1 test: m_field[i] = (qreal*)malloc(m_gridSize * sizeof(qreal));
Executed by:
  • tst_qquickturbulence
640
130 m_vectorField = (QPointF**)malloc(m_gridSize * sizeof(QPointF*));-
131 for (int i=0; i<m_gridSize; i++)
i<m_gridSizeDescription
TRUEevaluated 640 times by 1 test
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FALSEevaluated 2 times by 1 test
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2-640
132 m_vectorField[i] = (QPointF*)malloc(m_gridSize * sizeof(QPointF));
executed 640 times by 1 test: m_vectorField[i] = (QPointF*)malloc(m_gridSize * sizeof(QPointF));
Executed by:
  • tst_qquickturbulence
640
133-
134 QImage image;-
135 if (!m_noiseSource.isEmpty())
!m_noiseSource.isEmpty()Description
TRUEnever evaluated
FALSEevaluated 2 times by 1 test
Evaluated by:
  • tst_qquickturbulence
0-2
136 image = QImage(QQmlFile::urlToLocalFileOrQrc(m_noiseSource)).scaled(QSize(m_gridSize, m_gridSize));
never executed: image = QImage(QQmlFile::urlToLocalFileOrQrc(m_noiseSource)).scaled(QSize(m_gridSize, m_gridSize));
0
137 if (image.isNull())
image.isNull()Description
TRUEevaluated 2 times by 1 test
Evaluated by:
  • tst_qquickturbulence
FALSEnever evaluated
0-2
138 image = QImage(QStringLiteral(":particleresources/noise.png")).scaled(QSize(m_gridSize, m_gridSize));
executed 2 times by 1 test: image = QImage(([]() noexcept -> QString { enum { Size = sizeof(u"" ":particleresources/noise.png")/2 - 1 }; static const QStaticStringData<Size> qstring_literal = { { { { -1 } }, Size, 0, 0, sizeof(QStringData) }, u"" ":particleresources/noise.png" }; QStringDataPtr holder = { qstring_literal.data_ptr() }; const QString qstring_literal_temp(holder); return qstring_literal_temp; }())).scaled(QSize(m_gridSize, m_gridSize));
Executed by:
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executed 2 times by 1 test: return qstring_literal_temp;
Executed by:
  • tst_qquickturbulence
2
139-
140 for (int i=0; i<m_gridSize; i++)
i<m_gridSizeDescription
TRUEevaluated 640 times by 1 test
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  • tst_qquickturbulence
FALSEevaluated 2 times by 1 test
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2-640
141 for (int j=0; j<m_gridSize; j++)
j<m_gridSizeDescription
TRUEevaluated 204800 times by 1 test
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FALSEevaluated 640 times by 1 test
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640-204800
142 m_field[i][j] = qGray(image.pixel(QPoint(i,j)));
executed 204800 times by 1 test: m_field[i][j] = qGray(image.pixel(QPoint(i,j)));
Executed by:
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204800
143 for (int i=0; i<m_gridSize; i++){
i<m_gridSizeDescription
TRUEevaluated 640 times by 1 test
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  • tst_qquickturbulence
FALSEevaluated 2 times by 1 test
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  • tst_qquickturbulence
2-640
144 for (int j=0; j<m_gridSize; j++){
j<m_gridSizeDescription
TRUEevaluated 204800 times by 1 test
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  • tst_qquickturbulence
FALSEevaluated 640 times by 1 test
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  • tst_qquickturbulence
640-204800
145 m_vectorField[i][j].setX(boundsRespectingField(i-1,j) - boundsRespectingField(i,j));-
146 m_vectorField[i][j].setY(boundsRespectingField(i,j) - boundsRespectingField(i,j-1));-
147 }
executed 204800 times by 1 test: end of block
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204800
148 }
executed 640 times by 1 test: end of block
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149}
executed 2 times by 1 test: end of block
Executed by:
  • tst_qquickturbulence
2
150-
151qreal QQuickTurbulenceAffector::boundsRespectingField(int x, int y)-
152{-
153 if (x < 0)
x < 0Description
TRUEevaluated 640 times by 1 test
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  • tst_qquickturbulence
FALSEevaluated 818560 times by 1 test
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  • tst_qquickturbulence
640-818560
154 x = 0;
executed 640 times by 1 test: x = 0;
Executed by:
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640
155 if (x >= m_gridSize)
x >= m_gridSizeDescription
TRUEnever evaluated
FALSEevaluated 819200 times by 1 test
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  • tst_qquickturbulence
0-819200
156 x = m_gridSize - 1;
never executed: x = m_gridSize - 1;
0
157 if (y < 0)
y < 0Description
TRUEevaluated 640 times by 1 test
Evaluated by:
  • tst_qquickturbulence
FALSEevaluated 818560 times by 1 test
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640-818560
158 y = 0;
executed 640 times by 1 test: y = 0;
Executed by:
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640
159 if (y >= m_gridSize)
y >= m_gridSizeDescription
TRUEnever evaluated
FALSEevaluated 819200 times by 1 test
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160 y = m_gridSize - 1;
never executed: y = m_gridSize - 1;
0
161 return m_field[x][y];
executed 819200 times by 1 test: return m_field[x][y];
Executed by:
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819200
162}-
163-
164void QQuickTurbulenceAffector::ensureInit()-
165{-
166 if (m_inited)
m_initedDescription
TRUEevaluated 78 times by 1 test
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FALSEevaluated 2 times by 1 test
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167 return;
executed 78 times by 1 test: return;
Executed by:
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78
168 m_inited = true;-
169 initializeGrid();-
170}
executed 2 times by 1 test: end of block
Executed by:
  • tst_qquickturbulence
2
171-
172void QQuickTurbulenceAffector::affectSystem(qreal dt)-
173{-
174 if (!m_system || !m_enabled)
!m_systemDescription
TRUEnever evaluated
FALSEevaluated 80 times by 1 test
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  • tst_qquickturbulence
!m_enabledDescription
TRUEnever evaluated
FALSEevaluated 80 times by 1 test
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175 return;
never executed: return;
0
176 ensureInit();-
177 if (!m_gridSize)
!m_gridSizeDescription
TRUEnever evaluated
FALSEevaluated 80 times by 1 test
Evaluated by:
  • tst_qquickturbulence
0-80
178 return;
never executed: return;
0
179-
180 updateOffsets();//### Needed if an ancestor is transformed.-
181-
182 QRect boundsRect(0,0,m_gridSize,m_gridSize);-
183 foreach (QQuickParticleGroupData *gd, m_system->groupData){
_container_.controlDescription
TRUEevaluated 80 times by 1 test
Evaluated by:
  • tst_qquickturbulence
FALSEevaluated 80 times by 1 test
Evaluated by:
  • tst_qquickturbulence
_container_.controlDescription
TRUEevaluated 160 times by 1 test
Evaluated by:
  • tst_qquickturbulence
FALSEnever evaluated
_container_.i != _container_.eDescription
TRUEevaluated 80 times by 1 test
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  • tst_qquickturbulence
FALSEevaluated 80 times by 1 test
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  • tst_qquickturbulence
0-160
184 if (!activeGroup(gd->index))
!activeGroup(gd->index)Description
TRUEnever evaluated
FALSEevaluated 80 times by 1 test
Evaluated by:
  • tst_qquickturbulence
0-80
185 continue;
never executed: continue;
0
186 foreach (QQuickParticleData *d, gd->data){
_container_.controlDescription
TRUEevaluated 40000 times by 1 test
Evaluated by:
  • tst_qquickturbulence
FALSEevaluated 40000 times by 1 test
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  • tst_qquickturbulence
_container_.controlDescription
TRUEevaluated 40080 times by 1 test
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FALSEnever evaluated
_container_.i != _container_.eDescription
TRUEevaluated 40000 times by 1 test
Evaluated by:
  • tst_qquickturbulence
FALSEevaluated 80 times by 1 test
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0-40080
187 if (!shouldAffect(d))
!shouldAffect(d)Description
TRUEevaluated 16156 times by 1 test
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  • tst_qquickturbulence
FALSEevaluated 23844 times by 1 test
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16156-23844
188 continue;
executed 16156 times by 1 test: continue;
Executed by:
  • tst_qquickturbulence
16156
189 QPoint pos = (QPointF(d->curX(m_system), d->curY(m_system)) - m_offset).toPoint();-
190 if (!boundsRect.contains(pos,true))//Need to redo bounds checking due to quantization.
!boundsRect.contains(pos,true)Description
TRUEnever evaluated
FALSEevaluated 23844 times by 1 test
Evaluated by:
  • tst_qquickturbulence
0-23844
191 continue;
never executed: continue;
0
192 qreal fx = 0.0;-
193 qreal fy = 0.0;-
194 fx += m_vectorField[pos.x()][pos.y()].x() * m_strength;-
195 fy += m_vectorField[pos.x()][pos.y()].y() * m_strength;-
196 if (fx || fy){-
197 d->setInstantaneousVX(d->curVX(m_system)+ fx * dt, m_system);-
198 d->setInstantaneousVY(d->curVY(m_system)+ fy * dt, m_system);-
199 postAffect(d);-
200 }
executed 20708 times by 1 test: end of block
Executed by:
  • tst_qquickturbulence
20708
201 }
executed 23844 times by 1 test: end of block
Executed by:
  • tst_qquickturbulence
23844
202 }
executed 80 times by 1 test: end of block
Executed by:
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80
203}
executed 80 times by 1 test: end of block
Executed by:
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80
204-
205QT_END_NAMESPACE-
206-
207#include "moc_qquickturbulence_p.cpp"-
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