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Phileas

Fitting a slab to the slope of another slab

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@line-weight  you're totally right, almost all my windows are solid modelled, staircases obviously too since the stair tool is the worst abomination of this program in my opinion (I think we can all agree on that). But I still want to contribute to reaching that day where the tools will be powerful enough to do everything, and that's the reason I keep posting these days shouting out the headache the tools in this program give me some days...

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43 minutes ago, Phileas said:

But I still want to contribute to reaching that day where the tools will be powerful enough to do everything, and that's the reason I keep posting these days shouting out the headache the tools in this program give me some days...

 

Yup - me too.

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Extrude the soil above the lowest part of the slab.

Select both Slab & Soil

Model - Subtract Solids (Retain)

 

If you need to change the slab slope do so then copy and paste in place into the Solid Subtraction to update the soil.

 

Soil over pitched slab.png

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4 hours ago, line-weight said:

My approach to this would be the same as I take with walls when the VW tool can't produce what I want, which would be just to revert to direct solid modelling. I'd make the concrete element to the shape I want, then make an additional two objects using solids subtraction/addition, one for the sealing layer and one for the dirt/earth. I'd then give them the necessary attributes to show up as you desire in sections etc.

 

I also thought about that way.

Maybe there is any workaround to trick drainage + add solid to Slab and such.

But for the time I need to find or make that work, I can model a few

Generic Solids and try to manually add some suitable IFC Tags.

(Which also isn't that easy, when grouped or ion Symbols and such.

Also no proper Top Plan Style View with Solids ....)

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@bcd HEY man that looks promising as f*ck!!! not at work anymore, but I'll try that on monday and tell you guys if it worked 🙂 🙂 thanks!

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@zoomer what I usually do to get the top plan view I want when using solids is:

  • model the entire thing in 3D until you're happy with it. Make it a symbol by going to: Organisation -> Create Symbol
  • Drag it into it's final location
  • go to a top/plan view. You should see a mess of lines, because solid extruds have no fill in a top/plan view.
  • draw the 2D apparition you want your object to have on top of your object using 2D polylines or rectangles/triangles/whatever.
  • select every shape you drew
  • cut them using Ctrl+X (PC) or CMD+X (Mac)
  • Right-Click your Symbol and choose "Edit 2D part". You'll arrive to an empty screen, since your symbol has no 2D apparition yet.
  • Paste the things you cut out earlier (Ctrl+V on PC, CMD+V on Mac).
  • Go back to your top/plan view. You might find the 2D part of your symbol placed somewhere on your floorplan where it isn't supposed to be. But if you go to any 3D view, you'll see your Symbol is still placed correctly, only the 2D part is not sitting on top of the 3D one. SO you need to go to a top/plan view again,
  • double-click the offset 2D part of your symbol
  • everything except your 2D symbol will now show greyed out. drag the 2D part to it's correct location and exit back to your top/plan view.

Voilà, now you have the 2D apparition you want for your 2D/3D symbol.

I know you can convert any symbol directly to an hybrid symbol in the AEC panel, but I often find the automatic apparition oh the 3D symbols to show the wrong lines, or too few, or too many.

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My current favourite approach is to ignore top/plan completely, and my plans are generated as horizontal sections.

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19 minutes ago, Phileas said:
  • draw the 2D apparition you want your object to have on top of your object using 2D polylines or rectangles/triangles/whatever.
  • select every shape you drew

 

A cool variation on this is to simply edit the Symbol (3d component) and draw the 2d as Screen Plane objects. Then when you Exit Symbol it becomes a hybrid symbol with 3d & 2d already correctly aligned.

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Add the soil layer to the slab components so that it tapers like the tapered layers below. 

Create an extrude at height you want the soil level to be horizontal.

Select the extrude and the slab object, right click and subtract the extrude from the slab.838709149_Flattop.thumb.JPG.88adc01fd49c91915008b6228972f363.JPG

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On 2/1/2019 at 7:55 AM, line-weight said:

My current favourite approach is to ignore top/plan completely, and my plans are generated as horizontal sections.

@line-weight: please elaborate on that workflow when you have a sec. I am interested.

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5 hours ago, mjm said:

@line-weight: please elaborate on that workflow when you have a sec. I am interested.

 

I've found, at least for the kind of buildings that I do, that it's really a pain trying to build a model that also 'works' in top/plan view. All the stuff that I was having to do to get it to be correct in top/plan view was hindering me in having a model that I could edit fluently; it was just unpleasant trying to use it as part of a design process because there were certain things that I had treat specially in order not to break other stuff, and certain simple changes were just unduly tedious.

 

And I still wasn't getting floorplans, in top/plan view that I was happy sending out as finished drawings. This was partly due to the patching-up I was having to do in annotations - it was just too difficult to get a clean output.

 

So I decided to try a different strategy: the model is built in a way that makes sense in 3d rather than a way that forces top/plan view to produce something like what I want. This means quite a bit of stuff is solid-modelled rather than made with VW tools. Some stuff is built as wall objects and so on, but I'm now more free to use, say, wall objects where that makes things easier, and make other bits of walls from directly modelled objects where it doesn't.

 

Then the plan is simply a horizontal section viewport, sliced at the cutting plane height I want. This throws up a few small problems, which still have to be fixed in annotations, but I think fewer than when I was trying to do stuff in top/plan. There a few things - like door swing lines - that I have to draw on manually.

 

Editing the plan becomes a little messy - I still use top/plan for this, where it makes sense, but much of my editing and draughting is now done in a 3d openGL view instead.

 

I'm sure there are other types of project where this strategy wouldn't make things easier. For what I do which is smaller architectural projects with lots of one-off stuff and often involving old buildings and things like roofspaces, I think it suits me better. I'm currently trialing it on a couple of small projects, through to construction drawings. So I haven't tested it right the way through the process yet but so far it seems fairly promising. I was thinking that once I've reached the end of one of those projects, I might do a thread on here and post a version of the drawing file so that people can see what they think. Personally I think VW should head more in the direction of horizontal section concept for floorplans and that top/plan should gradually be brushed under the carpet. Others may disagree!

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