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
|
# Copyright (c) 2020 Ultimaker B.V.
# Cura is released under the terms of the LGPLv3 or higher.
import numpy
import math
from PyQt6.QtGui import QImage, qRed, qGreen, qBlue, qAlpha
from PyQt6.QtCore import Qt
from UM.Mesh.MeshReader import MeshReader
from UM.Mesh.MeshBuilder import MeshBuilder
from UM.Math.Vector import Vector
from UM.Job import Job
from UM.Logger import Logger
from .ImageReaderUI import ImageReaderUI
from cura.Scene.CuraSceneNode import CuraSceneNode as SceneNode
class ImageReader(MeshReader):
def __init__(self) -> None:
super().__init__()
self._supported_extensions = [".jpg", ".jpeg", ".bmp", ".gif", ".png"]
self._ui = ImageReaderUI(self)
def preRead(self, file_name, *args, **kwargs):
img = QImage(file_name)
if img.isNull():
Logger.log("e", "Image is corrupt.")
return MeshReader.PreReadResult.failed
width = img.width()
depth = img.height()
largest = max(width, depth)
width = width / largest * self._ui.default_width
depth = depth / largest * self._ui.default_depth
self._ui.setWidthAndDepth(width, depth)
self._ui.showConfigUI()
self._ui.waitForUIToClose()
if self._ui.getCancelled():
return MeshReader.PreReadResult.cancelled
return MeshReader.PreReadResult.accepted
def _read(self, file_name):
size = max(self._ui.getWidth(), self._ui.getDepth())
return self._generateSceneNode(file_name, size, self._ui.peak_height, self._ui.base_height, self._ui.smoothing, 512, self._ui.lighter_is_higher, self._ui.use_transparency_model, self._ui.transmittance_1mm)
def _generateSceneNode(self, file_name, xz_size, height_from_base, base_height, blur_iterations, max_size, lighter_is_higher, use_transparency_model, transmittance_1mm):
scene_node = SceneNode()
mesh = MeshBuilder()
img = QImage(file_name)
if img.isNull():
Logger.log("e", "Image is corrupt.")
return None
width = max(img.width(), 2)
height = max(img.height(), 2)
aspect = height / width
if img.width() < 2 or img.height() < 2:
img = img.scaled(width, height, Qt.AspectRatioMode.IgnoreAspectRatio)
height_from_base = max(height_from_base, 0)
base_height = max(base_height, 0)
xz_size = max(xz_size, 1)
scale_vector = Vector(xz_size, height_from_base, xz_size)
if width > height:
scale_vector = scale_vector.set(z=scale_vector.z * aspect)
elif height > width:
scale_vector = scale_vector.set(x=scale_vector.x / aspect)
if width > max_size or height > max_size:
scale_factor = max_size / width
if height > width:
scale_factor = max_size / height
width = int(max(round(width * scale_factor), 2))
height = int(max(round(height * scale_factor), 2))
img = img.scaled(width, height, Qt.AspectRatioMode.IgnoreAspectRatio)
width_minus_one = width - 1
height_minus_one = height - 1
Job.yieldThread()
texel_width = 1.0 / width_minus_one * scale_vector.x
texel_height = 1.0 / height_minus_one * scale_vector.z
height_data = numpy.zeros((height, width), dtype = numpy.float32)
for x in range(0, width):
for y in range(0, height):
qrgb = img.pixel(x, y)
if use_transparency_model:
height_data[y, x] = (0.299 * math.pow(qRed(qrgb) / 255.0, 2.2) + 0.587 * math.pow(qGreen(qrgb) / 255.0, 2.2) + 0.114 * math.pow(qBlue(qrgb) / 255.0, 2.2))
else:
height_data[y, x] = (0.212655 * qRed(qrgb) + 0.715158 * qGreen(qrgb) + 0.072187 * qBlue(qrgb)) / 255 # fast computation ignoring gamma and degamma
Job.yieldThread()
if lighter_is_higher == use_transparency_model:
height_data = 1 - height_data
for _ in range(0, blur_iterations):
copy = numpy.pad(height_data, ((1, 1), (1, 1)), mode = "edge")
height_data += copy[1:-1, 2:]
height_data += copy[1:-1, :-2]
height_data += copy[2:, 1:-1]
height_data += copy[:-2, 1:-1]
height_data += copy[2:, 2:]
height_data += copy[:-2, 2:]
height_data += copy[2:, :-2]
height_data += copy[:-2, :-2]
height_data /= 9
Job.yieldThread()
if use_transparency_model:
divisor = 1.0 / math.log(transmittance_1mm / 100.0) # log-base doesn't matter here. Precompute this value for faster computation of each pixel.
min_luminance = (transmittance_1mm / 100.0) ** height_from_base
for (y, x) in numpy.ndindex(height_data.shape):
mapped_luminance = min_luminance + (1.0 - min_luminance) * height_data[y, x]
height_data[y, x] = base_height + divisor * math.log(mapped_luminance) # use same base as a couple lines above this
else:
height_data *= scale_vector.y
height_data += base_height
if img.hasAlphaChannel():
for x in range(0, width):
for y in range(0, height):
height_data[y, x] *= qAlpha(img.pixel(x, y)) / 255.0
heightmap_face_count = 2 * height_minus_one * width_minus_one
total_face_count = heightmap_face_count + (width_minus_one * 2) * (height_minus_one * 2) + 2
mesh.reserveFaceCount(total_face_count)
# initialize to texel space vertex offsets.
# 6 is for 6 vertices for each texel quad.
heightmap_vertices = numpy.zeros((width_minus_one * height_minus_one, 6, 3), dtype = numpy.float32)
heightmap_vertices = heightmap_vertices + numpy.array([[
[0, base_height, 0],
[0, base_height, texel_height],
[texel_width, base_height, texel_height],
[texel_width, base_height, texel_height],
[texel_width, base_height, 0],
[0, base_height, 0]
]], dtype = numpy.float32)
offsetsz, offsetsx = numpy.mgrid[0: height_minus_one, 0: width - 1]
offsetsx = numpy.array(offsetsx, numpy.float32).reshape(-1, 1) * texel_width
offsetsz = numpy.array(offsetsz, numpy.float32).reshape(-1, 1) * texel_height
# offsets for each texel quad
heightmap_vertex_offsets = numpy.concatenate([offsetsx, numpy.zeros((offsetsx.shape[0], offsetsx.shape[1]), dtype = numpy.float32), offsetsz], 1)
heightmap_vertices += heightmap_vertex_offsets.repeat(6, 0).reshape(-1, 6, 3)
# apply height data to y values
heightmap_vertices[:, 0, 1] = heightmap_vertices[:, 5, 1] = height_data[:-1, :-1].reshape(-1)
heightmap_vertices[:, 1, 1] = height_data[1:, :-1].reshape(-1)
heightmap_vertices[:, 2, 1] = heightmap_vertices[:, 3, 1] = height_data[1:, 1:].reshape(-1)
heightmap_vertices[:, 4, 1] = height_data[:-1, 1:].reshape(-1)
heightmap_indices = numpy.array(numpy.mgrid[0:heightmap_face_count * 3], dtype = numpy.int32).reshape(-1, 3)
mesh._vertices[0:(heightmap_vertices.size // 3), :] = heightmap_vertices.reshape(-1, 3)
mesh._indices[0:(heightmap_indices.size // 3), :] = heightmap_indices
mesh._vertex_count = heightmap_vertices.size // 3
mesh._face_count = heightmap_indices.size // 3
geo_width = width_minus_one * texel_width
geo_height = height_minus_one * texel_height
# bottom
mesh.addFaceByPoints(0, 0, 0, 0, 0, geo_height, geo_width, 0, geo_height)
mesh.addFaceByPoints(geo_width, 0, geo_height, geo_width, 0, 0, 0, 0, 0)
# north and south walls
for n in range(0, width_minus_one):
x = n * texel_width
nx = (n + 1) * texel_width
hn0 = height_data[0, n]
hn1 = height_data[0, n + 1]
hs0 = height_data[height_minus_one, n]
hs1 = height_data[height_minus_one, n + 1]
mesh.addFaceByPoints(x, 0, 0, nx, 0, 0, nx, hn1, 0)
mesh.addFaceByPoints(nx, hn1, 0, x, hn0, 0, x, 0, 0)
mesh.addFaceByPoints(x, 0, geo_height, nx, 0, geo_height, nx, hs1, geo_height)
mesh.addFaceByPoints(nx, hs1, geo_height, x, hs0, geo_height, x, 0, geo_height)
# west and east walls
for n in range(0, height_minus_one):
y = n * texel_height
ny = (n + 1) * texel_height
hw0 = height_data[n, 0]
hw1 = height_data[n + 1, 0]
he0 = height_data[n, width_minus_one]
he1 = height_data[n + 1, width_minus_one]
mesh.addFaceByPoints(0, 0, y, 0, 0, ny, 0, hw1, ny)
mesh.addFaceByPoints(0, hw1, ny, 0, hw0, y, 0, 0, y)
mesh.addFaceByPoints(geo_width, 0, y, geo_width, 0, ny, geo_width, he1, ny)
mesh.addFaceByPoints(geo_width, he1, ny, geo_width, he0, y, geo_width, 0, y)
mesh.calculateNormals(fast = True)
scene_node.setMeshData(mesh.build())
return scene_node
|
