Unity & CityEngine 根据地图中建筑矢量数据批量建模

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Unity & CityEngine 根据地图中建筑矢量数据批量建模

2024-07-13 21:20:28| 来源: 网络整理| 查看: 265

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：

代码语言：javascript复制/** * 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 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)代码语言：javascript复制7.点击Generate，根据建模规则生成建筑模型