Just wondering if anyone has been using the old TriForma '2d/3d Choice' Design Mode 3 seed files to generate Compound Cells.
Kind of like the way the 'Update Master Model' setting dynamically cuts the 3d model and injects the extracted graphics the 2d model... The TF elements drawn in the 2d model also updates the 3d model.
This kind of working seems to offer a lot for Compound Cell creation and frequent updating.
I think in the current BIM-mad climate, LOD is going to be a key driver for how we break up and organise our 3d and 2d geometric info. Ref files have been great and Hypermodeling has built on top of that by providing a means to 'back-Ref' or infuse 2d drawn information into the 3d model.
I think CC's can help at the next level down, granularity-wise (next step up LOD-wise).
Let's take a section through the facade which needs to be detailed up.
1. We already use Ref-files to hive off the facade elements in separate Refs. This allows us to selectively load only the geometry we need and not get bogged down.
2. With Hypermodeling, we can back-Ref a 2d detail drawing into the 3d model and activate the 2d model and add detail there using familiar 2d tools. The additional LOD information is not in the 3d model but spatially 'hyperlinked'. This way the user can make changes in the 2d model and use it to update / align the 3d model and vice versa. Awesome.
So far so good. But what do you do if you need to add more information?
3. You could add an even more detailed 'high LOD' version(S) of the facade model that would 'shadow' the 'low LOD' model. But this would mean another thing to manually sync. Remember that that is already happening with item 2 above.
Maybe build a higher LOD model of the section of the facade where you are making the cuts. And substitute by volumetrically clip-masking the low LOD facade model...? Messy.
Better to re-build the section of the facade in a separate 'high LOD' model (using the old TF atfplan_and_model_2way.dgn seed) and generate a section cut-specific Compound Cell.
Tack on a facade-height Perforator to automatically do the clip masking.
Hmmm.... general tool for Ref attachments? Reference the low LOD facade model, insert a high LOD Cell with Perforator where a higher LOD proxy is required. Reference that 'high LOD' attachment with nesting depth 1 into your Composition Model. A 'non-destructive' Replace Cell would be useful as well. Implemented as a Drawing Rule?
Or, preserve the low LOD geometry on their pre-existing levels, and place all the higher LOD stuff on separate levels / F+P settings... but there would still be a need to turn the pre-existing low LOD levels off where they clash. Again, Drawing Rule?
LOD will have different levels... 100, 200, 300 or 'fine, medium.coarse' etc. Drawings Rules could mine the CC and turn the relevant levels on/off before using the CC ?
Worth keeping in mind that CC's have an important benefit: they minimise the amount of VE processing that needs to be done, something that is critical the more detail you have to deal with.
In any case, as mentioned elsewhere, it would be good to be able to edit CC's without having to manually rebuild them every time. TF's way of separating the 2d view geometry from the 3d model should make the 'dynamic updates' easier. I hope that this will be looked at for the ABD CE release.
The 2D/3D DEM mode was removed when we first moved to V8i back in 2008. It was mentioned towards the bottom of this FAQ:http://communities.bentley.com/products/building/building_analysis___design/w/building_analysis_and_design__wiki/3060.drawing-views-faq
Hmmm...
"The 2D/3D mode is no longer supported in V8i, having been replaced by Building Views which provide a much more robust "real time" environment. However, you can also use the “Sync Drawing View to Drawing Def” tool outlined above with this type of drawing extraction in order to bring your work forward."
...but still available?
"I understand that the 2D/3D work mode is no longer available in V8i, but what about the Plan Only mode? Since I can’t get to the main Drawing Extraction Manager dialog when opening these files, what should I do with them?
You can use your Plan Only files in V8i by using the following steps:
This seems to suggest that seed files with the 'Update 3d model' function set would still be recognised by ABD. If DEM is still a 'valid' tool... then atfplan_and_model_2way.dgn should still work but not supported...?
Unknown said:LOD is going to be a key driver for how we break up and organise our 3d and 2d geometric info
Unknown said:With Hypermodeling, we can back-Ref a 2d detail drawing into the 3d model and activate the 2d model and add detail there using familiar 2d tools. The additional LOD information is not in the 3d model but spatially 'hyperlinked'. This way the user can make changes in the 2d model and use it to update / align the 3d model and vice versa. Awesome.
What happened to the fundamental ideology of Single Building Model born c1993 (which only got renamed BIM when the data-structure tail started wagging the dog)? SBM says that with a single 3D model, everything by definition stays in sync, no more manual updating of different views to hopefully agree with each other. Then we say, pragmatically, all the detailing gets done in 2D - and so has to be manually updated to agree with the 3D model.
It turns out BIM is reckoned to be only good for schematics, 1:50 or smaller. Where do any of the BIM cos come clean and say that's the policy - that the SBM ideal turned out to be too ... idealistic? They don't come clean, but just omit to give any thought to/provide any tools for, detailing in 3D in the 3D SBM. Yes, it can be done, but all advice is to not try it.
All agree that it's absurd to draw the whole building up in 3D fine detail, just stick to schematic 1:50 LOD and do the 1:5s in 2D. But that's a 'straw man' argument - of course don't draw the whole building up in 3D fine detail - just do in 3D the bits where you intend to put a detail section callout through. In those limited 'clip volumes' promote the 1:50 LOD place-holder elements to 1:5 LOD versions of same - no parallel model-building at different LODs, having to be manually sync'd to agree with each other, and no clip-mask toggling.between them.
Yes, hyperlinking makes it easier to spot where a 2D detail has become out of sync with the 3D model, and put it right manually. The alternative, doing that detailing with 1:5 LOD 3D elements integral with the 3D model, makes such dicrepancy-spotting (if any, hard to imagine) even easier.
Yes, LOD is key, and would be the enabler (at last) of that 22 year old SBM ideal. How time flies, how old-BIM has dragged itrs heels, and how fresh-thinking are the new contender(s)!