forked from bkuster/gml2csg
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Bridge.py
181 lines (151 loc) · 6.16 KB
/
Bridge.py
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
# -----------------------------------------------------------------------------
# Copyright (c) Ben Kuster 2016, all rights reserved.
#
# Created: 2016-09-16
# Version: 0.1
# Purpose: Reads the XML Tree of a CityGML Bridge and writes a CSG representing it
# -----------------------------------------------------------------------------
import re
import string
import random
from sympy import Point3D, Plane, N
import numpy as np
from sklearn.cluster import MeanShift, estimate_bandwidth
from XmlReader import XmlReader
class ConstructionElement():
def __init__(self, elem):
self.elem = elem
self.name = ''
self.planes = []
def parse(self, lod, ns):
name = self.elem.find('./gml:name', ns)
if not name.text:
self.name = ''.join(random.choice(string.ascii_uppercase + string.digits) for _ in range(16))
else:
self.name = re.sub(' ', '_', name.text)
surfaces = self.elem.findall('./brid:lod{0}Geometry/gml:MultiSurface/gml:surfaceMember/gml:Polygon'.format(lod), ns)
for surf in surfaces:
exterior = surf.find('./gml:exterior/gml:LinearRing', ns)
interior = surf.find('./gml:interior', ns)
if interior:
print('found poly interior, cant handle, ignoring')
positions = exterior.findall('.//gml:pos', ns)
pointIndexes = [0, int(len(positions)/4), 2*int(len(positions)/4)]
points = []
for i in pointIndexes:
point = re.sub('\\s+', ',', positions[i].text).split(',')
points.append(Point3D(point))
self.planes.append(Plane(*points))
def writeExteriorCsg(self):
solidDef = 'solid {0}{1} = '.format(self.name, '_exterior')
for i in range(len(self.planes)):
plane = self.planes[i]
pointStr = '{0}'.format(self.__convertSympy(plane.p1.args))
normStr = '{0}'.format(self.__convertSympy(plane.normal_vector))
solidDef += 'plane({0};{1})'.format(
re.sub('\\(|\\)', '', pointStr),
re.sub('\\(|\\)', '', normStr)
)
if i == len(self.planes)-1:
solidDef += ';\n'
else:
solidDef += ' and '
return solidDef
def __convertSympy(self, tup):
return tuple([N(x) for x in tup])
class MultiSurface():
def __init__(self, elem):
self.elem = elem
self.planes = []
self.names = []
def parse(self, ns):
surfaces = self.elem.findall('./gml:surfaceMember/gml:Polygon', ns)
for surf in surfaces:
exterior = surf.find('./gml:exterior/gml:LinearRing', ns)
interior = surf.find('./gml:interior', ns)
if interior:
print('found poly interior, cant handle, ignoring')
positions = exterior.findall('.//gml:pos', ns)
pointIndexes = [0, int(len(positions)/4), 2*int(len(positions)/4)]
points = []
for i in pointIndexes:
point = re.sub('\\s+', ',', positions[i].text).split(',')
points.append(Point3D(point))
self.planes.append(Plane(*points))
def writeExteriorCsg(self):
foundClusters = self.findSolids()
solidDef = ''
for k, v in foundClusters.items():
name = 'multi_surface_{0}'.format(k)
solidDef += 'solid {0} = '.format(name)
self.names.append(name)
for i in range(len(v)):
plane = v[i]
pointStr = '{0}'.format(self.__convertSympy(plane.p1.args))
normStr = '{0}'.format(self.__convertSympy(plane.normal_vector))
solidDef += 'plane({0};{1})'.format(
re.sub('\\(|\\)', '', pointStr),
re.sub('\\(|\\)', '', normStr)
)
if i == len(v)-1:
solidDef += ';\n'
else:
solidDef += ' and '
return solidDef
def findSolids(self):
points = []
for plane in self.planes:
points.append(list(self.__convertSympy(plane.p1.args)))
points = np.array(points)
bandwidth = estimate_bandwidth(points)
ms = MeanShift(bandwidth, bin_seeding=True)
ms.fit(points)
solidGroups = np.unique(ms.labels_)
groups = {}
for group in solidGroups:
groups[group] = []
for labelIndex in ms.labels_:
if ms.labels_[labelIndex] == group:
groups[group].append(self.planes[labelIndex])
return groups
def __convertSympy(self, tup):
return tuple([N(x) for x in tup])
class Bridge():
def __init__(self, id, lod):
self.id = id
self.lod = lod
self.outerConstruction = []
self.mSurf = None
def parse(self, fileName):
reader = XmlReader()
root = reader.getById(fileName, self.id)
outerElems = root.findall('./brid:outerBridgeConstruction/brid:BridgeConstructionElement', reader.ns)
# multiSurface = root.findall('./brid:lod{0}MultiSurface/gml:MultiSurface'.format(self.lod), reader.ns)
for elem in outerElems:
constElem = ConstructionElement(elem)
self.outerConstruction.append(constElem)
for elem in self.outerConstruction:
elem.parse(self.lod, reader.ns)
# for elem in multiSurface:
# self.mSurf = MultiSurface(elem)
# self.mSurf.parse(reader.ns)
def write(self, fileName):
text = 'algebraic3d\n'
exteriors = []
for elem in self.outerConstruction:
exteriors.append(elem.name + '_exterior')
text += elem.writeExteriorCsg()
if self.mSurf:
text += self.mSurf.writeExteriorCsg()
for name in self.mSurf.names:
exteriors.append(name)
text += 'solid bridge = '
for i in range(len(exteriors)):
text += exteriors[i]
if i == len(exteriors)-1:
text += ';\n'
else:
text += ' or '
text += 'tlo bridge;'
with open(fileName, 'w') as f:
f.write(text)