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
|
# coding: utf-8
# /*##########################################################################
#
# Copyright (c) 2017 European Synchrotron Radiation Facility
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
#
# ###########################################################################*/
"""This module provides regular mesh item class.
"""
from __future__ import absolute_import
__authors__ = ["T. Vincent"]
__license__ = "MIT"
__date__ = "15/11/2017"
import numpy
from ..scene import primitives
from .core import DataItem3D, ItemChangedType
class Mesh(DataItem3D):
"""Description of mesh.
:param parent: The View widget this item belongs to.
"""
def __init__(self, parent=None):
DataItem3D.__init__(self, parent=parent)
self._mesh = None
def setData(self,
position,
color,
normal=None,
mode='triangles',
copy=True):
"""Set mesh geometry data.
Supported drawing modes are:
- For points: 'points'
- For lines: 'lines', 'line_strip', 'loop'
- For triangles: 'triangles', 'triangle_strip', 'fan'
:param numpy.ndarray position:
Position (x, y, z) of each vertex as a (N, 3) array
:param numpy.ndarray color: Colors for each point or a single color
:param numpy.ndarray normal: Normals for each point or None (default)
:param str mode: The drawing mode.
:param bool copy: True (default) to copy the data,
False to use as is (do not modify!).
"""
self._getScenePrimitive().children = [] # Remove any previous mesh
if position is None or len(position) == 0:
self._mesh = 0
else:
self._mesh = primitives.Mesh3D(
position, color, normal, mode=mode, copy=copy)
self._getScenePrimitive().children.append(self._mesh)
self.sigItemChanged.emit(ItemChangedType.DATA)
def getData(self, copy=True):
"""Get the mesh geometry.
:param bool copy:
True (default) to get a copy,
False to get internal representation (do not modify!).
:return: The positions, colors, normals and mode
:rtype: tuple of numpy.ndarray
"""
return (self.getPositionData(copy=copy),
self.getColorData(copy=copy),
self.getNormalData(copy=copy),
self.getDrawMode())
def getPositionData(self, copy=True):
"""Get the mesh vertex positions.
:param bool copy:
True (default) to get a copy,
False to get internal representation (do not modify!).
:return: The (x, y, z) positions as a (N, 3) array
:rtype: numpy.ndarray
"""
if self._mesh is None:
return numpy.empty((0, 3), dtype=numpy.float32)
else:
return self._mesh.getAttribute('position', copy=copy)
def getColorData(self, copy=True):
"""Get the mesh vertex colors.
:param bool copy:
True (default) to get a copy,
False to get internal representation (do not modify!).
:return: The RGBA colors as a (N, 4) array or a single color
:rtype: numpy.ndarray
"""
if self._mesh is None:
return numpy.empty((0, 4), dtype=numpy.float32)
else:
return self._mesh.getAttribute('color', copy=copy)
def getNormalData(self, copy=True):
"""Get the mesh vertex normals.
:param bool copy:
True (default) to get a copy,
False to get internal representation (do not modify!).
:return: The normals as a (N, 3) array, a single normal or None
:rtype: numpy.ndarray or None
"""
if self._mesh is None:
return None
else:
return self._mesh.getAttribute('normal', copy=copy)
def getDrawMode(self):
"""Get mesh rendering mode.
:return: The drawing mode of this primitive
:rtype: str
"""
return self._mesh.drawMode
|
