Latest Contributions by ThomasFuchs

Hello @bhusalshishir  Here is CGA code that creates a primitiveDisk and then uses the offset operation to hollow it out. Then the extrude operation gets applied on the annulus to form a culvert. Finally, the setNormals operation is used to set the normals of the inner and outer mantle to soft.   version "2024.1" @Description("Inner diameter") @Distance @Range(min=0.1, max=5) attr diameter = 1 @Description("Culvert length") @Distance @Range(min=0.1, max=20) attr length = 2 @Description("Wall thickness") @Distance @Range(min=0.1, max=1) attr thickness = 0.1 @Description("Number of subdivisions of the outer mantle") attr sides = min(128,max(16,floor(8*diameter)*4)) @StartRule Culvert --> Annulus Annulus --> primitiveDisk(sides, diameter+thickness) offset(-thickness) comp(f) { border = Extrude} Extrude --> extrude (length) comp(f) { side = setNormals(soft) Culvert. | all : Culvert. }     ... View more

Hello @josegudalupemeridajardinez  Thanks for the question. Just select a CGA Model (or any static model). Then to create .cgamat files you can use the CityEngine CGA Material Encoder option in the File > Export Models... dialog. Export a model—ArcGIS CityEngine Resources | Documentation The material descriptions of a CGA model are collected and written into individual subdirectories. Each subdirectory contains all the material—including the used textures—which can be copied into a folder of assets, for example. The name of the subdirectory and the .cgamat file is the material.name attribute but is made unique if there are several materials with the same name. The <matName>.cgamat file is in CSV format, as is the result of the CGA function: getMaterial(used, changed). .cgamat files are simple plain text file contain name of material attributes and its value seperated by a comma: metallic,0 roughness,1 colormap,Textures/Grass_Dry_10x10_Brown_Color.jpg colormap.su,0.1 colormap.sv,0.1 normalmap,Textures/Grass_10x10_Normal.jpg normalmap.rw, 0 normalmap.su,0.1 normalmap.sv,0.1 ... Note: You can also find some material files in the ESRI.lib under /assets/Materials. Only materials stored here are shown in the Material Browser. ESRI.lib—ArcGIS CityEngine Resources | Documentation To apply a .cgamat file on a shape, you need to set the path first. Then use the setMaterial operation—ArcGIS CityEngine Resources | Documentation and project the material on every face:   version "2024.1" @MaterialFile attr cgaMat = "/ESRI.lib/assets/Materials/Generic/Wood/Wood_Standard_10x10.cgamat" @StartRule SetMaterial --> setMaterial( readMaterial(cgaMat) ) comp(f) { all : setupProjection(0, scope.xy, 1, 1) projectUV(0) Material. }   ... View more

Hello @biaozeng  Thank you for this interesting question! Here are some CGA helper functions that will give you the index of the face with the largest area:   version "2024.1" sizes = comp(f){ all : geometry.area() } indices = sortIndices(sizes) largestIndex = indices[size(indices)-1] @StartRule // Apply on a shape with multiple front faces Generate --> comp(f) { front = comp(f) { largestIndex : color(1,0,1) fa. } }   ... View more

Hello @Kayleigh_T  Thanks for your interesting question! As you described, a rule package (*.rpk) has assets bundled into a file. Those assets are the ones referenced in the compiled rule (*.cgb). Optionally, the source rule files (*.cga) can also be included. However, the references in the rule are relative to the CityEngine workspace. To resolve those asset file references to the bundled ones, a file named .resolvemap.xml is included in every RPK. So if you are re-using CGA code from an RPK, make sure that all assets are correctly referenced relative to your workspace first. Then create a new RPK. To facilitate the task it makes sense to create a new project in the workspace and copy the content of the RPK into the folder structure of this projects. This should correctly reference rules and assets that were residing in the original project. Files from other projects are collected in the ".ws" folder. Those file references still need to be updated. I hope this lets you successfully customize the rule package. ... View more