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
|
# Copyright (C) 2022 The Qt Company Ltd.
# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
from __future__ import annotations
import numpy as np
from PySide6.QtCore import Property, Signal
from PySide6.QtGui import QVector3D
from PySide6.QtQml import QmlElement
from PySide6.QtQuick3D import QQuick3DGeometry
QML_IMPORT_NAME = "ExampleTriangleGeometry"
QML_IMPORT_MAJOR_VERSION = 1
@QmlElement
class ExampleTriangleGeometry(QQuick3DGeometry):
normalsChanged = Signal()
normalXYChanged = Signal()
uvChanged = Signal()
uvAdjustChanged = Signal()
def __init__(self, parent=None):
QQuick3DGeometry.__init__(self, parent)
self._hasNormals = False
self._normalXY = 0.0
self._hasUV = False
self._uvAdjust = 0.0
self.updateData()
@Property(bool, notify=normalsChanged)
def normals(self):
return self._hasNormals
@normals.setter
def normals(self, enable):
if self._hasNormals == enable:
return
self._hasNormals = enable
self.normalsChanged.emit()
self.updateData()
self.update()
@Property(float, notify=normalXYChanged)
def normalXY(self):
return self._normalXY
@normalXY.setter
def normalXY(self, xy):
if self._normalXY == xy:
return
self._normalXY = xy
self.normalXYChanged.emit()
self.updateData()
self.update()
@Property(bool, notify=uvChanged)
def uv(self):
return self._hasUV
@uv.setter
def uv(self, enable):
if self._hasUV == enable:
return
self._hasUV = enable
self.uvChanged.emit()
self.updateData()
self.update()
@Property(float, notify=uvAdjustChanged)
def uvAdjust(self):
return self._uvAdjust
@uvAdjust.setter
def uvAdjust(self, f):
if self._uvAdjust == f:
return
self._uvAdjust = f
self.uvAdjustChanged.emit()
self.updateData()
self.update()
def updateData(self):
self.clear()
stride = 3
if self._hasNormals:
stride += 3
if self._hasUV:
stride += 2
# We use numpy arrays to handle the vertex data,
# but still we need to consider the 'sizeof(float)'
# from C to set the Stride, and Attributes for the
# underlying Qt methods
FLOAT_SIZE = 4
vertexData = np.zeros(3 * stride, dtype=np.float32)
# a triangle, front face = counter-clockwise
p = 0
vertexData[p] = -1.0
p += 1
vertexData[p] = -1.0
p += 1
vertexData[p] = 0.0
p += 1
if self._hasNormals:
vertexData[p] = self._normalXY
p += 1
vertexData[p] = self._normalXY
p += 1
vertexData[p] = 1.0
p += 1
if self._hasUV:
vertexData[p] = 0.0 + self._uvAdjust
p += 1
vertexData[p] = 0.0 + self._uvAdjust
p += 1
vertexData[p] = 1.0
p += 1
vertexData[p] = -1.0
p += 1
vertexData[p] = 0.0
p += 1
if self._hasNormals:
vertexData[p] = self._normalXY
p += 1
vertexData[p] = self._normalXY
p += 1
vertexData[p] = 1.0
p += 1
if self._hasUV:
vertexData[p] = 1.0 - self._uvAdjust
p += 1
vertexData[p] = 0.0 + self._uvAdjust
p += 1
vertexData[p] = 0.0
p += 1
vertexData[p] = 1.0
p += 1
vertexData[p] = 0.0
p += 1
if self._hasNormals:
vertexData[p] = self._normalXY
p += 1
vertexData[p] = self._normalXY
p += 1
vertexData[p] = 1.0
p += 1
if self._hasUV:
vertexData[p] = 1.0 - self._uvAdjust
p += 1
vertexData[p] = 1.0 - self._uvAdjust
p += 1
self.setVertexData(vertexData.tobytes())
self.setStride(stride * FLOAT_SIZE)
self.setBounds(QVector3D(-1.0, -1.0, 0.0), QVector3D(+1.0, +1.0, 0.0))
self.setPrimitiveType(QQuick3DGeometry.PrimitiveType.Triangles)
self.addAttribute(
QQuick3DGeometry.Attribute.Semantic.PositionSemantic, 0,
QQuick3DGeometry.Attribute.ComponentType.F32Type
)
if self._hasNormals:
self.addAttribute(
QQuick3DGeometry.Attribute.Semantic.NormalSemantic,
3 * FLOAT_SIZE,
QQuick3DGeometry.Attribute.ComponentType.F32Type,
)
if self._hasUV:
self.addAttribute(
QQuick3DGeometry.Attribute.TexCoordSemantic,
6 * FLOAT_SIZE if self._hasNormals else 3 * FLOAT_SIZE,
QQuick3DGeometry.Attribute.F32Type,
)
|
