Unity & CityEngine 根据地图中建筑矢量数据批量建模

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
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
/**
 * File:    Building_From_Footprint.cga
 * Created: 20 Mar 2011 16:42:13 GMT
 * Updated: 10 April 2014
 * Author:  Esri R&D Center Zurich
 */
 
 
version "2014.0"



@Hidden(Usage,BuildingHeight,UpperfloorHeight)
import Facade_Textures:"/ESRI.lib/rules/Facades/Facade_Textures.cga" (BuildingHeight=Eave_Ht,UpperfloorHeight=Floor_Ht*unitScale,Usage=Usage)
@Hidden(Usage,UpperfloorHeight)
import Facade_Schematic:"/ESRI.lib/rules/Facades/Facade_Schematic.cga" (UpperfloorHeight=Floor_Ht*unitScale,Usage=Usage)
import Roof_Textures:"/ESRI.lib/rules/Roofs/Roof_Textures.cga"



###################################
# Attributes
#

@Group("Building Settings",1) 

@Order(1) @Range(1,400) @Description("Distance from ground to bottom of roof") 
attr Eave_Ht 		= _getInitialEaveHeight
@Order(2) @Range(1,400) @Description("Distance from ground to top of roof") 
attr Ridge_Ht 		= _getInitialRidgeHeight
@Order(3) @Range("Random","Agricultural","Assembly","Educational","Industry","Mercantile","Office","Other","Public","Residential","Service","Transport","Unknown","Utility")
attr Usage 			= _getInitialUsage
@Order(4) @Range("extrusion","setback top","setback facade","setback base","setback everywhere")
attr Building_Form 	= _getInitialBuildingForm
@Order(5) @Range("flat","shed","pyramid","gable","hip","half-hip","gablet","gambrel","mansard","gambrel-flat","mansard-flat","vault","dome","saltbox","butterfly")								# gable & shed combinations
attr Roof_Form 		= _getInitialRoofForm
@Order(6) @Range(2.9,5.2) @Description("in Meters")
attr Floor_Ht 		= 3.7
@Hidden
attr Roof_Ht 		= (Ridge_Ht - Eave_Ht) * unitScale

@Group("Visualization Options",2) 

@Order(1) @Range("realistic with facade textures","schematic facades","solid color")
attr Representation = "realistic with facade textures"
@Order(2) @Range(0,1)
attr Transparency 	= 0
@Order(3) @Range(0,1)
attr OverwriteColor = "#ffffff"

@Group("Rule Options") 

@Order(2) @Range("Meters","Feet") @Description("Unit of Height Attributes") 
attr Unit = "Meters"



###################################
# Consts
#

# user-driven constants
const unitScale = case Unit=="Feet": 1/0.3048006096012192 else: 1

# for curved roofs such as dome or vault
const curvedAngleResolution = 10	



###################################
# Functions
#

# for curved roofs such as dome or vault
calcSegmentHt(n) = Roof_Ht * (cos(n*curvedAngleResolution) - cos((n+1)*curvedAngleResolution))

_getInitialBuildingForm =
	case Eave_Ht*unitScale < 50 : "extrusion"
	case Eave_Ht*unitScale > 100: "setback everywhere"
	else                        : 5%:"extrusion" 15%:"setback top" 15%:"setback facade" 15%:"setback base" else:"setback everywhere"

_getInitialUsage =
	case Eave_Ht>30: "Random" else: 80%:"Residential" else:"Random"

_getInitialEaveHeight =
	case geometry.area < 100 : geometry.area/rand(5,10)
	case geometry.area < 1000: geometry.area/rand(15,25)
	case geometry.area < 7000: geometry.area/rand(10,25)
	else                     : geometry.area/rand(70,200)

_getInitialRidgeHeight =
	case Eave_Ht<30: Eave_Ht+rand(3,6) else: Eave_Ht

_getInitialRoofForm =
	case Ridge_Ht < Eave_Ht+1: "flat"
	else: 40%: "hip" 50%: "gable" else: "gambrel"



###################################
###################################
#
# RULES
#
###################################
###################################

@StartRule
Generate -->
	cleanupGeometry(all,1)
	alignScopeToAxes(y) s('1,0,'1)		# make it horizontal i.e. scale it flat
	alignScopeToGeometry(yUp, 0, longest)
	set(Eave_Ht,Eave_Ht*unitScale)
	set(Floor_Ht,Floor_Ht*unitScale)
	report("Footprint Area (m2)",geometry.area) report("Nbr of Floors",rint(Eave_Ht/Floor_Ht)) 
	set(material.opacity,1-Transparency)
	color(OverwriteColor)
	Footprint



###################################
# Building Mass
#

Footprint -->
	case scope.sz < 10 || scope.sx < 10:
		Extrusion(Eave_Ht,true,1)
	case Building_Form == "setback top":
		SetbackTop
	case Building_Form == "setback facade":
		SetbackFacade
	case Building_Form == "setback base":
		SetbackBase
	case Building_Form == "setback everywhere":
		SetbackAll
	else:
		Extrusion(Eave_Ht,true,1)

SetbackTop --> 
	split(x){ 'rand(0.1,0.3): Extrusion(Eave_Ht-rint(rand(3))*Floor_Ht,false,4)
			| ~1            : Extrusion(Eave_Ht,true,6)
			| 'rand(0.1,0.3): Extrusion(Eave_Ht-rint(rand(3))*Floor_Ht,false,4) }

SetbackFacade -->
	split(z){ 'rand(0.03,0.2): Extrusion(Eave_Ht*rand(0.2,0.8),false,2)
			| ~1  			: Extrusion(Eave_Ht,true,6)
			| 'rand(0.03,0.2): Extrusion(Eave_Ht*rand(0.2,0.8),false,2) }

SetbackBase -->
	[ extrude(3*Floor_Ht) Mass(false) ]
	t(0,3*Floor_Ht,0)
	split(x){ 'rand(0.6,0.8): Extrusion(Eave_Ht-3*Floor_Ht,true,6) }

SetbackAll -->
	[ extrude(3*Floor_Ht) Mass(false) ]
	t(0,3*Floor_Ht,0)
	set(Eave_Ht,Eave_Ht-3*Floor_Ht)
	split(x){ 'rand(0.6,0.8): 
		split(z){ '0.2: Extrusion(Eave_Ht*rand(0.2,0.8),false,2)
				| ~1  : SetbackTop
				| '0.2: Extrusion(Eave_Ht*rand(0.2,0.8),false,2) }
	}
	
Extrusion(height,constructRoof,maxLength) -->
	convexify(maxLength) 
	comp(f){ all: alignScopeToGeometry(yUp, 0, longest) ExtrusionConvexified(height,constructRoof,maxLength) }
	
ExtrusionConvexified(height,constructRoof,maxLength) -->
	case scope.sx < maxLength+1 || scope.sz < maxLength+1: NIL
	else: 
		report("Gross Floor Area (m2)",geometry.area*rint(height/Floor_Ht))
		extrude(height) Mass(constructRoof)

Mass(constructRoof) -->
	case constructRoof:
		comp(f){side : Facade | top : Roof }
	else:
		comp(f){side : Facade | top : RoofPlane }
		
		

###################################
# Roof Generation
#

Roof -->
	case Roof_Form == "shed"		: ShedRoof
	case Roof_Form == "pyramid"		: PyramidRoof
	case Roof_Form == "gable"		: GableRoof
	case Roof_Form == "hip"			: HipRoof
	case Roof_Form == "half-hip"	: HalfHipRoof
	case Roof_Form == "gablet"		: GabletRoof
	case Roof_Form == "gambrel"		: GambrelRoof
	case Roof_Form == "mansard"		: MansardRoof
	case Roof_Form == "gambrel-flat": GambrelFlatRoof
	case Roof_Form == "mansard-flat": MansardFlatRoof
	case Roof_Form == "vault"		: VaultRoof
	case Roof_Form == "dome"		: DomeRoof
	case Roof_Form == "saltbox"		: SaltboxRoof
	case Roof_Form == "butterfly"	: ButterflyRoof
	else							: FlatRoof

# basic roof types
	
ShedRoof -->
	roofShed(15) RoofMassScale

GableRoof -->
	roofGable(45,0,0,false,0) RoofMassScale

HipRoof -->
	roofHip(45) RoofMassScale

PyramidRoof -->
	roofPyramid(45) RoofMassScale

# gable & hip combinations

HalfHipRoof -->
	roofGable(45,0,0,false,0) s('1,Roof_Ht,'1) 	# creates a gable roof and sets its height to the given roof height
	split(y){ '0.5: RoofMass(true)				# ... 
					comp(f){ bottom: NIL | horizontal: set(Roof_Ht,Roof_Ht*0.5) HipRoof } } # ... and invokes a hip roof on the top

GabletRoof -->
	roofHip(45) s('1,Roof_Ht,'1)
	split(y){ '0.5: RoofMass(true) 
					comp(f){ bottom: NIL | horizontal: set(Roof_Ht,Roof_Ht*0.5) GableRoof } }	

# gable/hip double-pitched

GambrelRoof -->
	roofGable(70,0,0,false,0) 
	split(y){ Roof_Ht*0.7: RoofMass(true) 
						   comp(f){ bottom: NIL | horizontal: set(Roof_Ht,Roof_Ht*0.3) GableRoof } }

MansardRoof -->
	roofHip(70)
	split(y){ Roof_Ht*0.7: RoofMass(true) 
						   comp(f){ bottom: NIL | horizontal: set(Roof_Ht,Roof_Ht*0.3) HipRoof } }

# gable/hip with flat top

GambrelFlatRoof -->
	roofGable(45,0,0,false,0) 
	split(y){ Roof_Ht: RoofMass(false) }

MansardFlatRoof -->
	roofHip(45) 
	split(y){ Roof_Ht: RoofMass(false) }

# round roofs

VaultRoof -->
	VaultRoof(90/curvedAngleResolution-1)

VaultRoof(n) -->
	case n > 0: roofGable(n*curvedAngleResolution,0,0,false,0)
		        split(y){ (calcSegmentHt(n)): RoofMass(n!=1) 
									          comp(f){ bottom: NIL | horizontal: VaultRoof(n-1) } }
	else: NIL

DomeRoof -->
	DomeRoof(90/curvedAngleResolution-1)

DomeRoof(n) -->
	case n > 0: roofHip(n*curvedAngleResolution)
		        split(y){ (calcSegmentHt(n)): RoofMass(n!=1) 
									          comp(f){ bottom: NIL | horizontal: DomeRoof(n-1) } }
	else: NIL

# gable & shed combinations

SaltboxRoof -->
	roofShed(45) s('1,1.5*Roof_Ht,'1)
	split(y){ '0.333: RoofMass(true) 
					  comp(f){ bottom: NIL | horizontal: set(Roof_Ht,Roof_Ht*0.5) roofGable(45,0,0,false,geometry.nVertices-1) RoofMassScale } }

ButterflyRoof -->
	split(y){ '0.5: roofShed(45,geometry.nVertices/2) RoofMassScale | '0.5: ShedRoof }

# flat roof

FlatRoof -->
	case Roof_Ht > 0.1:
		RoofPlane offset(-0.4,border) extrude(Roof_Ht) RoofMass(false)
	else:
		RoofPlane
	
# roof volume
	
RoofMassScale -->
	s('1,Roof_Ht,'1)
	RoofMass(false)
	
RoofMass(removeBottomAndTop) -->
	case removeBottomAndTop:
		comp(f){ horizontal: NIL | vertical: Facade | all: RoofPlane }
	else: # remove only the bottom face
		comp(f){ bottom: NIL | vertical: Facade | all: RoofPlane }



###################################
# Surface Texturing & Coloring
#

RoofPlane -->
	case Representation == "realistic with facade textures":
		Roof_Textures.Generate
	else:
		SolidColor

Facade -->
	case Representation == "realistic with facade textures": 
		Facade_Textures.Generate
	case Representation == "schematic facades":
		case OverwriteColor == "#ffffff":
			Facade_Schematic.Generate
		else:
			set(Facade_Schematic.SecondaryColor,OverwriteColor)
			Facade_Schematic.Generate
	else: 
		SolidColor

SolidColor -->
	color(OverwriteColor)