1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
|
// Copyright (C) 2021 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
#include "qquick3dparticleshape_p.h"
#include "qquick3dparticlerandomizer_p.h"
#include "qquick3dparticlesystem_p.h"
#include "qquick3dparticleutils_p.h"
#include <QtCore/qdir.h>
#include <QtQml/qqmlfile.h>
#include <QtQuick3D/private/qquick3dobject_p.h>
#include <QtQuick3D/private/qquick3dmodel_p.h>
#include <QtQuick3DRuntimeRender/private/qssgrenderbuffermanager_p.h>
#include <algorithm>
QT_BEGIN_NAMESPACE
/*!
\qmltype ParticleShape3D
\inherits ParticleAbstractShape3D
\inqmlmodule QtQuick3D.Particles3D
\brief Offers 3D shapes for emitters and affectors.
\since 6.2
The ParticleShape3D element supports shapes like \c Cube, \c Sphere and \c Cylinder for particles needs.
For example, emitter can use \l {ParticleEmitter3D::shape}{shape} property to emit particles from the
shape area.
Shapes don't have position, scale or rotation. Instead, they use parent node for these properties.
*/
QQuick3DParticleShape::QQuick3DParticleShape(QObject *parent)
: QQuick3DParticleAbstractShape(parent)
{
}
/*!
\qmlproperty bool ParticleShape3D::fill
This property defines if the shape should be filled or just use the shape outlines.
The default value is \c true.
*/
bool QQuick3DParticleShape::fill() const
{
return m_fill;
}
void QQuick3DParticleShape::setFill(bool fill)
{
if (m_fill == fill)
return;
m_fill = fill;
Q_EMIT fillChanged();
}
/*!
\qmlproperty ShapeType ParticleShape3D::type
This property defines the type of the shape.
The default value is \c ParticleShape3D.Cube.
*/
/*!
\qmlproperty enumeration ParticleShape3D::ShapeType
Defines the type of the shape.
\value ParticleShape3D.Cube
Cube shape.
\value ParticleShape3D.Sphere
Sphere shape.
\value ParticleShape3D.Cylinder
Cylinder shape.
*/
QQuick3DParticleShape::ShapeType QQuick3DParticleShape::type() const
{
return m_type;
}
/*!
\qmlproperty vector3d ParticleShape3D::extents
This property defines the extents of the shape.
The default value for each axis is \c 50.
*/
QVector3D QQuick3DParticleShape::extents() const
{
return m_extents;
}
void QQuick3DParticleShape::setType(QQuick3DParticleShape::ShapeType type)
{
if (m_type == type)
return;
m_type = type;
Q_EMIT typeChanged();
}
void QQuick3DParticleShape::setExtents(QVector3D extents)
{
if (m_extents == extents)
return;
m_extents = extents;
Q_EMIT extentsChanged();
}
QVector3D QQuick3DParticleShape::getPosition(int particleIndex)
{
if (!parentNode() || !m_system)
return QVector3D();
if (m_cachedIndex == particleIndex)
return m_cachedPosition;
switch (m_type) {
case QQuick3DParticleShape::ShapeType::Cube:
m_cachedPosition = randomPositionCube(particleIndex);
break;
case QQuick3DParticleShape::ShapeType::Sphere:
m_cachedPosition = randomPositionSphere(particleIndex);
break;
case QQuick3DParticleShape::ShapeType::Cylinder:
m_cachedPosition = randomPositionCylinder(particleIndex);
break;
}
m_cachedIndex = particleIndex;
return m_cachedPosition;
}
QVector3D QQuick3DParticleShape::getSurfaceNormal(int particleIndex)
{
if (m_fill)
return QVector3D();
auto rand = m_system->rand();
QVector3D n;
switch (m_type) {
case QQuick3DParticleShape::ShapeType::Cube: {
int side = int(rand->get(particleIndex, QPRand::Shape4) * 6);
if (side == 0)
n.setX(-1.0f);
else if (side == 1)
n.setX(1.0f);
else if (side == 2)
n.setY(-1.0f);
else if (side == 3)
n.setY(1.0f);
else if (side == 4)
n.setZ(-1.0f);
else
n.setZ(1.0f);
QMatrix4x4 mat;
mat.rotate(m_parentNode->rotation());
n = mat.mapVector(n);
} break;
case QQuick3DParticleShape::ShapeType::Sphere:
if (particleIndex != m_cachedIndex)
getPosition(particleIndex);
n = m_cachedPosition.normalized();
break;
case QQuick3DParticleShape::ShapeType::Cylinder:
QVector3D scale = m_parentNode->scale();
float theta = rand->get(particleIndex, QPRand::Shape3) * float(M_PI) * 2.0f;
float x = QPCOS(theta);
float z = QPSIN(theta);
x = x * scale.x();
z = z * scale.z();
QVector3D normal(x, 0.0, z);
QMatrix4x4 mat;
mat.rotate(m_parentNode->rotation());
n = mat.mapVector(normal.normalized());
break;
}
return n;
}
QVector3D QQuick3DParticleShape::randomPositionCube(int particleIndex) const
{
auto rand = m_system->rand();
QVector3D s = m_parentNode->scale() * m_extents;
float x = s.x() - (rand->get(particleIndex, QPRand::Shape1) * s.x() * 2.0f);
float y = s.y() - (rand->get(particleIndex, QPRand::Shape2) * s.y() * 2.0f);
float z = s.z() - (rand->get(particleIndex, QPRand::Shape3) * s.z() * 2.0f);
if (!m_fill) {
// Random 0..5 for cube sides
int side = int(rand->get(particleIndex, QPRand::Shape4) * 6);
if (side == 0)
x = -s.x();
else if (side == 1)
x = s.x();
else if (side == 2)
y = -s.y();
else if (side == 3)
y = s.y();
else if (side == 4)
z = -s.z();
else
z = s.z();
}
QMatrix4x4 mat;
mat.rotate(m_parentNode->rotation());
return mat.mapVector(QVector3D(x, y, z));
}
QVector3D QQuick3DParticleShape::randomPositionSphere(int particleIndex) const
{
auto rand = m_system->rand();
QVector3D scale = m_parentNode->scale() * m_extents;
float theta = rand->get(particleIndex, QPRand::Shape1) * float(M_PI) * 2.0f;
float v = rand->get(particleIndex, QPRand::Shape2);
float phi = acos((2.0f * v) - 1.0f);
float r = m_fill ? pow(rand->get(particleIndex, QPRand::Shape3), 1.0f / 3.0f) : 1.0f;
float x = r * QPSIN(phi) * QPCOS(theta);
float y = r * QPSIN(phi) * QPSIN(theta);
float z = r * QPCOS(phi);
QVector3D pos(x, y, z);
pos *= scale;
QMatrix4x4 mat;
mat.rotate(m_parentNode->rotation());
return mat.mapVector(pos);
}
QVector3D QQuick3DParticleShape::randomPositionCylinder(int particleIndex) const
{
auto rand = m_system->rand();
QVector3D scale = m_parentNode->scale() * m_extents;
float y = scale.y() - (rand->get(particleIndex, QPRand::Shape1) * scale.y() * 2.0f);
float r = 1.0f;
if (m_fill)
r = sqrt(rand->get(particleIndex, QPRand::Shape2));
float theta = rand->get(particleIndex, QPRand::Shape3) * float(M_PI) * 2.0f;
float x = r * QPCOS(theta);
float z = r * QPSIN(theta);
x = x * scale.x();
z = z * scale.z();
QVector3D pos(x, y, z);
QMatrix4x4 mat;
mat.rotate(m_parentNode->rotation());
return mat.mapVector(pos);
}
QT_END_NAMESPACE
|
