Ceiling Grid Start Point for Irregular Rooms

Support questions regarding the use of automated room creation and methods for creating room (aka space) and floor boundaries manually. Also any questions regarding use of any of the other Drawing Discovery tools like ceiling grids, floor match placement, or representative object placement.

Ceiling Grid Start Point for Irregular Rooms

Postby DeanUser » Fri Nov 26, 2010 5:21 pm

When I let DraftLogic Electrical's Ceiling Grid maker and Mass Ceiling Grid maker select 'Middle of Room' for me as the start point of the grid, it works great for most rooms. For some irregularly shaped rooms I have run across, I want some particular results that I need to select my own start point for.

Do you have any tips on how to select a starting point for rooms that are irregularly shaped?
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Joined: Wed Sep 16, 2009 10:32 pm

Re: Ceiling Grid Start Point for Irregular Rooms

Postby forumadmin » Sat Dec 11, 2010 9:24 pm

Hi Dean,

Thanks for your question, I think it is going to be of interest to some of our other users :)

To select your own start point just click it in the drawing window during the Ceiling Grid process instead of hitting <Enter> or your right mouse button to accept the 'Middle of Room' default value. The prompt at this point is 'Select the start point for the T-Bar to be calculated/<Middle of room>:' .

So it is easy to use a specific point instead of letting DraftLogic Electrical make a determination of room center for the starting point of the ceiling grid pattern. We're all good so far if you are content to select a start point this way. If you are not content, the trick is giving yourself a concretely determined point to select other than having to 'select by zen' with nothing to guide you other than eyeballing and instinct.

The first thing to be aware of is that most layers are turned off for the Ceiling Grid tool in order to reduce clutter and give you the best chance of selecting the polyline you want. So you'll need to place any guide points or guide lines on a layer that will stay on, like the room boundary layer (zDL_ROOM_BDRY).

The second thing to be aware of is that the point you select is going to be the intersection of four grid cells. So if you want something other than the intersection of four grids to occur at your target point, you actually need to lay down guide lines or a guide point that is offset. For example, if I am putting in a 2'x4' grid but want the cell center to start at the room center that I have selected, I would put down a couple of lines 2' and then 1' away from the point I want the cell center to start it. It is this offset point that I will select as my grid starting point.

WithStartPointGuidelinesAndOrPoints_20101211.png (6.27 KiB) Viewed 18336 times

If I want to try out a variety of start points and see how they fit the room, I will set up my reference points options and then copy the room boundary & reference points to an open area of the drawing.

CopiesReadyToMakeGridOptions_20101211.png (3.49 KiB) Viewed 18336 times

Then I will take the few seconds to fill them all with grid using the Ceiling Grid tool & decide which one I want to actually use.

GridOptions_20101211.png (9.95 KiB) Viewed 18336 times

Once I have decided, I can do a crossing select and shift de-select to ensure I select only the ceiling grid lines and not the room boundary and reference lines but then use a corner of the room as the base point of the move (same for start and destination to line up the move nicely).

SelectedAllThenDeselectedNonCeilingGridLines_20101211.png (7.05 KiB) Viewed 18336 times

MovedSelectedGridToRoomToKeep_20101211.png (11.42 KiB) Viewed 18336 times

As always, feel free to call, email, post to forums, or Skype chat if you have any questions about this or any other DraftLogic Electrical matters!
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