STENCIL 2D ELEMENT ON 3D GEOMETRY

Hi all,

I am having a problem in Open roads designer connect edition with the command STENCIL 2D ELEMENT ON 3D GEOMETRY. This command (in Visualization) helps to drape 2D mesh layer onto 3D surface above it. But for Some surfaces, the 3D DRAPED projection seems to be clashing with the surface onto which the draping has been done. Though the vertical offset is set as 1 cm from the surface onto which draping is done. It works good for most of the surfaces, but on some surfaces (like Bunds) it doesn't.

I have attached an image to understand better. In image, the brown mesh layer has been projected (draped) onto cyan surface layer (with 1 cm vertical offset.. of course !!). For such cyan surface layer here, at some locations there seems to be clash between brown layer and cyan layer. The whole cyan layer should be hidden below the brown layer if all went right.

This happens only in Openroads Designer. In Microstation or Mxroad it gives good / with little clash results.

  • I believe the stencil tool was designed for adding things like 2D white lines and road markings to a surface. Where do you get the brown mesh from? It looks like it is a copy (at least in plan) of the cyan surface.

    I am not sure what you are trying to achieve - if you want a copy of the cyan surface 1cm higher, why not create a mesh and just move it up?



  • Hi Mark, 

    Thanks for your views. The example I have shown is just one shape. I need to do a lot more such draping for multiple element. Hence, the method suggested by you would be lot more time consuming. Further, The cyan part is going to be proposed surface .. say for a Highway Project. And the Draped brown part would resemble Planting surface (different layers for different type of planting) over it. Hence, such draping is required over the whole area and not only for small strip.

    Thanks in advance. 

  • If I understand the description of the work correctly, you're adding extra layers of earthworks on top of a designed surface.
    As Mark already said, the most logical way to model this is to add them in your design.

    There are several different ways to do this. The most obvious would be to built all surfaces into the corridor and use point controls to change the horizontal position of the different layers.

    A good alternative, and keeping mostly to your current workflow, is using different surface templates, each designed to the type of earthworks you need to add.
    Surface templates are mostly used to build from a surface down, but it is also possible to build upwards.
    Because this is an ORD function instead of plain microstation the chances of it working with the design are much better.

  • Yes Jan, you understood right that we need an additional layer over the Base layer (on which the draping is done). But, these Base layers are created by other disciplines (i.e. highway, drainage, environment, structures, etc.) and I am not having rights to do anything with that models. so I am having only such layers with lot of overlapping partially each other. What I really want is to have an additional layer in my model that would fit over the given base layers for the whole area. So this command only is suitable to work upon. What I Do is create 2D layers and then project them over the given base layers. And likewise I need to create such additional layers over entire area.

    I am attaching an image below in which the use of STENCIL command in MxRoad which gives right solution. But if we import this additional layer into ORD, the same clash as in previous image shows. So, I think there is some graphical presentation issue with the ORD.

    The below projections has been done in MxRoad.

    Thanks.

  • I think using a surface template might work very well.
    Instead of draping using the stencil command you build a surface from the various base layers.

    I'm not sure if it is better to first build one surface and then divide it using boundaries, or to build many smaller surfaces from the start. The most important part is to make sure the surfaces follow the base layer.

    The last step is to apply the surface template that models your part of the design. It doesn't matter if it is one large surface or many small ones, the end result will be the same.

    If you are not familiar with surfaces and surface templates, check out the Bentley Learnserver. This might be a good place to start 04 - OpenRoads Designer - Terrain Modeling