Unity & CityEngine 根据地图中建筑矢量数据批量建模
【摘要】
1.首先要拿到目标区域的建筑矢量数据
2.在City Engine中新建一个工程
工程命名
3.将建筑矢量数据导入到CityEngine中
导入建筑矢量数据
4.新建一个场景
5.将shp数据文件拖入到场景当中
6.选择所有Shapes，赋予一个建模规则
我们也...
1.首先要拿到目标区域的建筑矢量数据
2.在City Engine中新建一个工程
工程命名
3.将建筑矢量数据导入到CityEngine中
导入建筑矢量数据
4.新建一个场景
5.将shp数据文件拖入到场景当中
6.选择所有Shapes，赋予一个建模规则
我们也可以自定义一个建模规则，下面是CityEngine中内置的规则文件，可供参考：
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/**
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* File: Building_From_Footprint.cga
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* Created: 20 Mar 2011 16:42:13 GMT
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* Updated: 10 April 2014
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* Author: Esri R&D Center Zurich
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*/
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version "2014.0"
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@Hidden(Usage,BuildingHeight,UpperfloorHeight)
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import Facade_Textures:"/ESRI.lib/rules/Facades/Facade_Textures.cga" (BuildingHeight=Eave_Ht,UpperfloorHeight=Floor_Ht*unitScale,Usage=Usage)
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@Hidden(Usage,UpperfloorHeight)
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import Facade_Schematic:"/ESRI.lib/rules/Facades/Facade_Schematic.cga" (UpperfloorHeight=Floor_Ht*unitScale,Usage=Usage)
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import Roof_Textures:"/ESRI.lib/rules/Roofs/Roof_Textures.cga"
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###################################
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# Attributes
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#
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@Group("Building Settings",1)
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@Order(1) @Range(1,400) @Description("Distance from ground to bottom of roof")
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attr Eave_Ht = _getInitialEaveHeight
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@Order(2) @Range(1,400) @Description("Distance from ground to top of roof")
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attr Ridge_Ht = _getInitialRidgeHeight
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@Order(3) @Range("Random","Agricultural","Assembly","Educational","Industry","Mercantile","Office","Other","Public","Residential","Service","Transport","Unknown","Utility")
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attr Usage = _getInitialUsage
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@Order(4) @Range("extrusion","setback top","setback facade","setback base","setback everywhere")
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attr Building_Form = _getInitialBuildingForm
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@Order(5) @Range("flat","shed","pyramid","gable","hip","half-hip","gablet","gambrel","mansard","gambrel-flat","mansard-flat","vault","dome","saltbox","butterfly") # gable & shed combinations
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attr Roof_Form = _getInitialRoofForm
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@Order(6) @Range(2.9,5.2) @Description("in Meters")
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attr Floor_Ht = 3.7
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@Hidden
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attr Roof_Ht = (Ridge_Ht - Eave_Ht) * unitScale
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@Group("Visualization Options",2)
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@Order(1) @Range("realistic with facade textures","schematic facades","solid color")
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attr Representation = "realistic with facade textures"
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@Order(2) @Range(0,1)
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attr Transparency = 0
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@Order(3) @Range(0,1)
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attr OverwriteColor = "#ffffff"
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@Group("Rule Options")
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@Order(2) @Range("Meters","Feet") @Description("Unit of Height Attributes")
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attr Unit = "Meters"
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###################################
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# Consts
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#
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# user-driven constants
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const unitScale = case Unit=="Feet": 1/0.3048006096012192 else: 1
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# for curved roofs such as dome or vault
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const curvedAngleResolution = 10
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###################################
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# Functions
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#
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# for curved roofs such as dome or vault
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calcSegmentHt(n) = Roof_Ht * (cos(n*curvedAngleResolution) - cos((n+1)*curvedAngleResolution))
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_getInitialBuildingForm =
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case Eave_Ht*unitScale < 50 : "extrusion"
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case Eave_Ht*unitScale > 100: "setback everywhere"
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else : 5%:"extrusion" 15%:"setback top" 15%:"setback facade" 15%:"setback base" else:"setback everywhere"
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_getInitialUsage =
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case Eave_Ht>30: "Random" else: 80%:"Residential" else:"Random"
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_getInitialEaveHeight =
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case geometry.area < 100 : geometry.area/rand(5,10)
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case geometry.area < 1000: geometry.area/rand(15,25)
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case geometry.area < 7000: geometry.area/rand(10,25)
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else : geometry.area/rand(70,200)
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_getInitialRidgeHeight =
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case Eave_Ht<30: Eave_Ht+rand(3,6) else: Eave_Ht
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_getInitialRoofForm =
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case Ridge_Ht < Eave_Ht+1: "flat"
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else: 40%: "hip" 50%: "gable" else: "gambrel"
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###################################
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###################################
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#
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# RULES
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#
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###################################
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###################################
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@StartRule
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Generate -->
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cleanupGeometry(all,1)
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alignScopeToAxes(y) s('1,0,'1) # make it horizontal i.e. scale it flat
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alignScopeToGeometry(yUp, 0, longest)
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set(Eave_Ht,Eave_Ht*unitScale)
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set(Floor_Ht,Floor_Ht*unitScale)
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report("Footprint Area (m2)",geometry.area) report("Nbr of Floors",rint(Eave_Ht/Floor_Ht))
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set(material.opacity,1-Transparency)
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color(OverwriteColor)
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Footprint
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###################################
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# Building Mass
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#
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Footprint -->
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case scope.sz < 10 || scope.sx < 10:
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Extrusion(Eave_Ht,true,1)
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case Building_Form == "setback top":
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SetbackTop
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case Building_Form == "setback facade":
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SetbackFacade
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case Building_Form == "setback base":
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SetbackBase
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case Building_Form == "setback everywhere":
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SetbackAll
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else:
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Extrusion(Eave_Ht,true,1)
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SetbackTop -->
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split(x){ 'rand(0.1,0.3): Extrusion(Eave_Ht-rint(rand(3))*Floor_Ht,false,4)
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| ~1 : Extrusion(Eave_Ht,true,6)
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| 'rand(0.1,0.3): Extrusion(Eave_Ht-rint(rand(3))*Floor_Ht,false,4) }
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SetbackFacade -->
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split(z){ 'rand(0.03,0.2): Extrusion(Eave_Ht*rand(0.2,0.8),false,2)
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| ~1 : Extrusion(Eave_Ht,true,6)
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| 'rand(0.03,0.2): Extrusion(Eave_Ht*rand(0.2,0.8),false,2) }
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SetbackBase -->
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[ extrude(3*Floor_Ht) Mass(false) ]
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t(0,3*Floor_Ht,0)
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split(x){ 'rand(0.6,0.8): Extrusion(Eave_Ht-3*Floor_Ht,true,6) }
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SetbackAll -->
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[ extrude(3*Floor_Ht) Mass(false) ]
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t(0,3*Floor_Ht,0)
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set(Eave_Ht,Eave_Ht-3*Floor_Ht)
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split(x){ 'rand(0.6,0.8):
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split(z){ '0.2: Extrusion(Eave_Ht*rand(0.2,0.8),false,2)
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| ~1 : SetbackTop
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| '0.2: Extrusion(Eave_Ht*rand(0.2,0.8),false,2) }
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}
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Extrusion(height,constructRoof,maxLength) -->
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convexify(maxLength)
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comp(f){ all: alignScopeToGeometry(yUp, 0, longest) ExtrusionConvexified(height,constructRoof,maxLength) }
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ExtrusionConvexified(height,constructRoof,maxLength) -->
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case scope.sx < maxLength+1 || scope.sz < maxLength+1: NIL
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else:
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report("Gross Floor Area (m2)",geometry.area*rint(height/Floor_Ht))
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extrude(height) Mass(constructRoof)
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Mass(constructRoof) -->
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case constructRoof:
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comp(f){side : Facade | top : Roof }
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else:
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comp(f){side : Facade | top : RoofPlane }
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###################################
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# Roof Generation
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#
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Roof -->
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case Roof_Form == "shed" : ShedRoof
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case Roof_Form == "pyramid" : PyramidRoof
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case Roof_Form == "gable" : GableRoof
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case Roof_Form == "hip" : HipRoof
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case Roof_Form == "half-hip" : HalfHipRoof
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case Roof_Form == "gablet" : GabletRoof
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case Roof_Form == "gambrel" : GambrelRoof
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case Roof_Form == "mansard" : MansardRoof
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case Roof_Form == "gambrel-flat": GambrelFlatRoof
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case Roof_Form == "mansard-flat": MansardFlatRoof
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case Roof_Form == "vault" : VaultRoof
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case Roof_Form == "dome" : DomeRoof
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case Roof_Form == "saltbox" : SaltboxRoof
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case Roof_Form == "butterfly" : ButterflyRoof
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else : FlatRoof
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# basic roof types
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ShedRoof -->
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roofShed(15) RoofMassScale
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GableRoof -->
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roofGable(45,0,0,false,0) RoofMassScale
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HipRoof -->
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roofHip(45) RoofMassScale
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PyramidRoof -->
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roofPyramid(45) RoofMassScale
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# gable & hip combinations
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HalfHipRoof -->
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roofGable(45,0,0,false,0) s('1,Roof_Ht,'1) # creates a gable roof and sets its height to the given roof height
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split(y){ '0.5: RoofMass(true) # ...
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comp(f){ bottom: NIL | horizontal: set(Roof_Ht,Roof_Ht*0.5) HipRoof } } # ... and invokes a hip roof on the top
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GabletRoof -->
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roofHip(45) s('1,Roof_Ht,'1)
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split(y){ '0.5: RoofMass(true)
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comp(f){ bottom: NIL | horizontal: set(Roof_Ht,Roof_Ht*0.5) GableRoof } }
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# gable/hip double-pitched
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GambrelRoof -->
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roofGable(70,0,0,false,0)
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split(y){ Roof_Ht*0.7: RoofMass(true)
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comp(f){ bottom: NIL | horizontal: set(Roof_Ht,Roof_Ht*0.3) GableRoof } }
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MansardRoof -->
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roofHip(70)
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split(y){ Roof_Ht*0.7: RoofMass(true)
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comp(f){ bottom: NIL | horizontal: set(Roof_Ht,Roof_Ht*0.3) HipRoof } }
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# gable/hip with flat top
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GambrelFlatRoof -->
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roofGable(45,0,0,false,0)
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split(y){ Roof_Ht: RoofMass(false) }
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MansardFlatRoof -->
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roofHip(45)
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split(y){ Roof_Ht: RoofMass(false) }
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# round roofs
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VaultRoof -->
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VaultRoof(90/curvedAngleResolution-1)
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VaultRoof(n) -->
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case n > 0: roofGable(n*curvedAngleResolution,0,0,false,0)
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split(y){ (calcSegmentHt(n)): RoofMass(n!=1)
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comp(f){ bottom: NIL | horizontal: VaultRoof(n-1) } }
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else: NIL
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DomeRoof -->
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DomeRoof(90/curvedAngleResolution-1)
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DomeRoof(n) -->
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case n > 0: roofHip(n*curvedAngleResolution)
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split(y){ (calcSegmentHt(n)): RoofMass(n!=1)
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comp(f){ bottom: NIL | horizontal: DomeRoof(n-1) } }
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else: NIL
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# gable & shed combinations
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SaltboxRoof -->
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roofShed(45) s('1,1.5*Roof_Ht,'1)
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split(y){ '0.333: RoofMass(true)
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comp(f){ bottom: NIL | horizontal: set(Roof_Ht,Roof_Ht*0.5) roofGable(45,0,0,false,geometry.nVertices-1) RoofMassScale } }
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ButterflyRoof -->
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split(y){ '0.5: roofShed(45,geometry.nVertices/2) RoofMassScale | '0.5: ShedRoof }
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# flat roof
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FlatRoof -->
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case Roof_Ht > 0.1:
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RoofPlane offset(-0.4,border) extrude(Roof_Ht) RoofMass(false)
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else:
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RoofPlane
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# roof volume
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RoofMassScale -->
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s('1,Roof_Ht,'1)
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RoofMass(false)
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RoofMass(removeBottomAndTop) -->
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case removeBottomAndTop:
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comp(f){ horizontal: NIL | vertical: Facade | all: RoofPlane }
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else: # remove only the bottom face
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comp(f){ bottom: NIL | vertical: Facade | all: RoofPlane }
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###################################
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# Surface Texturing & Coloring
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#
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RoofPlane -->
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case Representation == "realistic with facade textures":
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Roof_Textures.Generate
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else:
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SolidColor
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Facade -->
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case Representation == "realistic with facade textures":
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Facade_Textures.Generate
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case Representation == "schematic facades":
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case OverwriteColor == "#ffffff":
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Facade_Schematic.Generate
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else:
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set(Facade_Schematic.SecondaryColor,OverwriteColor)
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Facade_Schematic.Generate
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else:
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SolidColor
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SolidColor -->
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color(OverwriteColor)
7.点击Generate，根据建模规则生成建筑模型
8.导出.fbx格式文件
9.将导出的.fbx文件连同贴图一起导入到Unity中
10.将模型放到场景中查看效果
文章来源: coderz.blog.csdn.net，作者：CoderZ1010，版权归原作者所有，如需转载，请联系作者。
原文链接：coderz.blog.csdn.net/article/details/124466335
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