Create Terrain From Graphical Filter
Graphic Filter Manager
Filter Feature Type = Break lines
Civil Features selected include mesh that is to define terrain. The mesh is created from a template for a road that has points that run along the top of the surface and points that are directly below those points.
Sometimes the top of the mesh is used and sometimes the bottom is used.
In the attachment, the green shapes represent the pavement and the red lines represent triangles of the terrain that gets created.
Keith,
Since the meshes are part of a corridor, depending on the settings there will also be a top-mesh. You can try to build your own surface using the top-mesh and a boundary.If that doesn't work the way you want it to, you can edit the template that is used in the corridor to create an extra mesh of only the pavement topside. It's sort of like the corridor top-mesh, but limited to where you want it to be.It's different from Alternate surface in that it will always create the mesh, you just have to be resourceful with the feature and level settings to differentiate between the topside and the full pavement.
Jan
Thanks Jan. We already have terrains from the "Design" Volume Option of the components that are set accordingly. We would need to create a separate set of corridors that include only those components that we desire for the pavement surface terrain.
I tried setting a component that followed the pavement surface only, but how do I designate that as a Top Mesh (rather than an Alternate Surface, which crashes)? I thought that Top Mesh method used all of the components set as "Design" Volume Option. However, I noticed a "Custom" Volume Option. Can we select that as a criteria for creating a terrain From Mesh?
You are correct in that the top-mesh uses all components.What I meant to explain was to create a different mesh with a feature that you choose to distinguish it from the rest of the design, e.g. "topsurface pavement". Then you can select this feature as the source for the terrain you want to create.It is not an alternate surface, but rather a permanent mesh that coexists with the top of normal pavement design. The image below is a simple illustration. The grey box is the normal pavement design mesh, the red dashed line is the topsurface mesh. Both are a permanent part of the corridor without using alternate surface or any other technique.
I know it is something of a workaround, but this is one way of creating a mesh that leaves no question about the Z-value since there is only one point at every XY location
I recognized your recommendation as a workaround in my sleep last night. Sometimes you need to get away from it to see it clearly. I am going to use a closed shape rather than an open one for the surface. The closed shape must double back on itself to look correct but I think that will work.
I will test and verify. I think it will work as a workaround, but it seems like there is a fault in the program so I am going to create a service ticket too.