Cityengine 3D pipe modeling tutorial

1、 Create for the entire 2D pipeline 3m The buffer （Buffer）, The specific parameter configuration is shown in the figure below ：

2、 Will create the 【 Buffer layer 】 Put it in data Folder and import to CityEngine in ： 

3、 Add break point information to each section of pipeline in turn . Start and end of pipe segment Y value , Corresponding to the starting pipe center elevation of the attribute information respectively （st_mz） And the center elevation of the end pipe （end_mz）：

4、 Assign rule files to all objects , The rule file needs to be edited by yourself ：

// pipArea（ The transverse ）
/**
 * File:    pipArea.cga
 * Created: 5 Feb 2020 08:53:09 GMT
 * Author:  Administrator
 */

version "2018.0"

@Group("Pip",1) 
attr diameter=3.024
@Group("Pip",2) 
attr link=0.5
Pipes -->
	Pipes(diameter)

Pipes(diameter) -->
	Pipe(diameter)Flow(diameter)
Pipe(diameter) -->

  s(scope.sx+link,diameter,diameter) 
  i("primitives/cylinder.hor.obj") 
  color("#000000")	
  center(xyz)
  
Flow(diameter) -->
  t(0.1,diameter*0.1,diameter*0.1)
  s(scope.sx+link,diameter*0.8,diameter*0.8) 
  i("primitives/cylinder.hor.obj") 
  color("#6495ED")	
  center(xyz)
 
# PipeHolderLeft(diameter) -->
# 	t(-diameter*0.6,-diameter*0.1,-diameter*0.1) 
# 	s(diameter*1.2,diameter*1.2,diameter*1.2) 
# 	primitiveCube
# 	color("#708090")	
# 	center(xyz)

// pipArea（ vertical ）
/**
 * File:    pipArea.cga
 * Created: 5 Feb 2020 08:53:09 GMT
 * Author:  Administrator
 */

version "2018.0"

@Group("Pip",1) 
attr diameter=3.024
@Group("Pip",2) 
attr link=0.5
Pipes -->
	Pipes(diameter)

Pipes(diameter) -->
   alignScopeToGeometry(yUp, 1)
	Pipe(diameter)Flow(diameter) 
	
Pipe(diameter) -->

  s(scope.sx+link,diameter,diameter) 
  i("primitives/cylinder.hor.obj") 
  color("#000000")	
  	center(xyz)
  
Flow(diameter) -->
  t(0.1,diameter*0.1,diameter*0.1)
  s(scope.sx+link,diameter*0.8,diameter*0.8) 
  i("primitives/cylinder.hor.obj") 
  color("#6495ED")	
 center(xyz)
 
# PipeHolderLeft(diameter) -->
# 	t(-diameter*0.6,-diameter*0.1,-diameter*0.1) 
# 	s(diameter*1.2,diameter*1.2,diameter*1.2) 
# 	primitiveCube
# 	color("#708090")	
# 	center(xyz)

 5、 Modify the diameter of each section of pipeline in turn , The diameter of the corresponding attribute information ：

6、 Solve the gap problem at the turning point of the pipe by adjusting the indentation of the pipe ：

7、 Check and generate model .

8、 export GDB Format model , And in arcgis View the effect ：