Tutorial: How to use Propagate Planar
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BimPropagatePlanar is one of the five Propagate flavours. It can be used to copy detailed connections between two or more planar entities. Common examples are wall-slab connections or wall-wall connections. For a more in-depth explanation of the general principles of Propagate, read this article on Propagate.
Procedure: Propagating a wall-slab connection
Consider the following situation of four walls and one slab, created with QuickDraw.
The four walls were given a composition, as well as the floor slab. Without any further editing or modelling, creating a vertical section through the building will show the connection one of the walls (1) and the slab (2) to be something similar to the following image.
While this section is active, we can Push/Pull the different ply faces to obtain the desired connection between the wall and the slab:
We can detail this connection even further, for example by locally adding a skirting board (3). This was done by simply drawing a box and classifying this solid as a Building Element.
Now that we have this detailed connection, we want it to be applied to every location where a wall and slab of this type come together. Let’s deactivate the section and launch BimPropagatePlanar.
You are prompted: Select planar solids to connect.
Select the wall and slab, and press Enter.
You are prompted: Select detail objects (solids or faces) to be extruded along the connection (optional).
Select the skirting board solid, and press Enter.
You are prompted: The detail section varies too much along the extrusion direction.
In this particular case, BimPropagatePlanar cannot find a solution: because the skirting board is not modelled along the entire length of the wall, BimPropagatePlanar finds contradicting detail volumes. This problem can be solved easily by activating a section where the skirting board is present (e.g. the section we used earlier to create this detail), and trying again. If we now follow the same steps as before, BimPropagate finds a detail volume as shown in the image below.
You are prompted: Propagate detail as an extrusion of this 2D section? [Yes/No/Inflate first] <Yes>:
Inflating the detail is not necessary in this case. For more information on inflating, read the article on Propagate. Choosing ‘No’ will exit the command. Press Enter to accept.
BimPropagatePlanar now scans the entire drawing for similar locations. When this is done, all sections are deactivated and the view is zoomed out to show all possible locations. Every suggestion is highlighted and a widget is displayed:
You are prompted: Choose next action [Apply all/Cancel] <Apply all>:
A green check mark means that this suggestion will be applied when pressing Enter. A question mark means that it will not be applied due to one of several possible reasons. Hovering over the widget will reveal more information. In this case it says “Location of original detail. Click to replace original detail by adapted extrusion”. Because we modeled the skirting board only locally, we should replace the original detail by an adapted extrusion so that it covers the entire length of the wall. Clicking the widget will turn it into a green check mark.
Press Enter to complete the command.
Now all four walls should have this particular connection with the floor slab, including the skirting board.