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Cutting holes using void geometry

From: Revit Architecture 2013 Essential Training

Video: Cutting holes using void geometry

In this movie, we'll continue with the geometry for our pool table family, and we're going to add a void form. And the void form will be used to carve the pockets out of the tabletop surface here. So, I'm in a file called Adding Voids, and I've got my four windows tiled: my Floor Plan, my 3D View, and a Front and a Left Elevation. I'm going to do this work in the Floor Plan view. And like we did in the Adding Solids movie, I want to take these solid forms and go to the sunglasses and temporarily hide those, just to get them out of my way for a moment.

Cutting holes using void geometry

In this movie, we'll continue with the geometry for our pool table family, and we're going to add a void form. And the void form will be used to carve the pockets out of the tabletop surface here. So, I'm in a file called Adding Voids, and I've got my four windows tiled: my Floor Plan, my 3D View, and a Front and a Left Elevation. I'm going to do this work in the Floor Plan view. And like we did in the Adding Solids movie, I want to take these solid forms and go to the sunglasses and temporarily hide those, just to get them out of my way for a moment.

I'm going to zoom in over here on this corner, because I want to get a nice clean look at those reference planes. It's really important that the geometry I create is associated with the reference planes and not the other geometry. I'm going to go to the Create tab. And over here on the Forms panel, there is a dropdown which gives you the same five shapes that we have as solids, but we can create those as voids. And voids just cut away from the solids. So I'm going to go down here and choose a Void Extrusion.

For this example, I'm going to approximate the shape of the pockets, and I'm going to just work with a simple circle. Of course, if I was trying to do an accurate pool table, the shape of the pocket isn't really completely round and circular; it's got a slightly different shape, but for this example, we'll just not worry too much about that. Let's go with a 2-inch radius, and I've snapped it directly to the intersection of those reference planes. Now, if you look over here, you'll see that the work plane is still at the reference level.

So we're going to actually adjust that in just a few moments. But what I want to do is come over here and make another one at 2 inches. I'm going to go to Modify, cancel out of there, and I'm going to select both of these, and I'm going to move them down. And I'm going to just click any start point, start moving down, and then I'm going to type in 1.25 inches. Then I'm going to select only this one, go to Move, start moving it to the right the same amount, 1.25 inches.

So, this one is shifted in from the center line in both directions; this one is just down; and then finally, I'll take this one and mirror it to the other side. So, the two corner pockets have the same relationship, and the side pocket is a little different. And then finally, all three of them can mirror around this direction like so. Now again, because of the work plane here, you can see that that sketch is all sitting on the floor right now.

So, let's finish the sketch, but what I want you to see is you can actually use this button right here and do Edit Work Plane and I can move it up to the playing surface, and click OK. When I do that, you'll see it jump up and go to that correct height now. So, there's a few different ways you can get there. Now, you kind of see this sort of transparent blue glass material. Now, if I deselect it, it's now a transparent orange-type glass. Now, the reason that it looks like this is because I built it on the floor and then moved it up.

Had I built it right on the correct work plane to begin with, it would have automatically attached itself to the nearby geometry. Well, all we have to do is use the Cut Geometry tool, and I'm going to select that, pick on a solid form, and then pick on the void, and the void will now carve away from the solid form. I'm going to repeat that with the rectangle here, and I might have to use my Tab key to get it, move it around sometimes.

There it is right there. Get the extrusion and I also want to add the same void to it. Now, of course when I do that, it doesn't really cut anything yet because, as you can see, it's sitting right on the surface of that solid. But if I come over here into one of the elevation views, locate that void--you might have to use your Tab key; there it is right there with the Tab key-- I can grab this little shape handle at the bottom, drag it down, and snap it to that underside reference plane.

I'm going to go ahead and lock that, and notice that it now cuts-- let's select this and orbit slightly-- You can see that it now cuts all the way through. So, a void form can be created in the same shape as all the solid forms--you can do them as sweeps, or as extrusions, or blends, or any of the same forms-- but the difference is it actually carves away from 3D geometry instead of adding to it. And so using a combination of solids and voids, you can usually create much more complex 3D forms for your families.

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This video is part of

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Revit Architecture 2013 Essential Training

96 video lessons · 12631 viewers

Paul F. Aubin
Author

 
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  1. 1m 57s
    1. Welcome
      1m 2s
    2. Using the exercise files
      55s
  2. 14m 43s
    1. Introducing building information modeling (BIM)
      3m 0s
    2. Working in one model with many views
      4m 48s
    3. Understanding Revit element hierarchy
      6m 55s
  3. 54m 44s
    1. Understanding the different versions of Revit
      1m 19s
    2. Exploring the Recent Files window and the application menu
      5m 20s
    3. Using the ribbon and the Quick Access Toolbar (QAT)
      7m 12s
    4. Understanding context ribbons
      4m 43s
    5. Using the Properties palette
      8m 31s
    6. Using the Project Browser
      5m 34s
    7. Navigating views: Zooming, panning, and rotating
      5m 57s
    8. The basics of selecting and modifying
      9m 49s
    9. Accessing Revit options
      6m 19s
  4. 47m 6s
    1. Creating a new project from a template
      7m 42s
    2. Accessing a multi-user project with worksharing
      4m 16s
    3. Configuring project settings
      6m 33s
    4. Adding levels
      7m 40s
    5. Adding grids
      6m 23s
    6. Refining a layout with temporary dimensions
      6m 58s
    7. Adding columns
      7m 34s
  5. 1h 11m
    1. Adding walls
      8m 48s
    2. Using snaps
      6m 24s
    3. Exploring wall properties and types
      7m 37s
    4. Locating walls
      7m 27s
    5. Using the modify tools
      9m 32s
    6. Adding doors and windows
      7m 39s
    7. Using constraints
      8m 27s
    8. Adding plumbing fixtures and other components
      8m 39s
    9. Using Autodesk Seek
      4m 19s
    10. Using wall joins
      3m 0s
  6. 1h 11m
    1. Linking AutoCAD DWG files
      10m 59s
    2. Creating topography from a DWG link
      7m 43s
    3. Understanding CAD inserts
      7m 56s
    4. Import tips
      6m 49s
    5. Creating a group
      7m 10s
    6. Mirroring groups to create a layout
      5m 3s
    7. Creating Revit links
      5m 16s
    8. Rotating and aligning a Revit link
      7m 6s
    9. Establishing shared coordinates
      6m 5s
    10. Managing links
      6m 0s
    11. Understanding file formats
      59s
  7. 1h 13m
    1. Working with floors
      8m 57s
    2. Working with footprint roofs
      6m 22s
    3. Working with extrusion roofs
      4m 59s
    4. Attaching walls to roofs
      3m 17s
    5. Using the shape editing tools to create a flat roof
      6m 33s
    6. Working with slope arrows
      6m 0s
    7. Adding openings
      8m 33s
    8. Working with stairs
      8m 4s
    9. Adding railings to stairs
      3m 40s
    10. Working with ceilings
      9m 36s
    11. Adding extensions to railings
      7m 20s
  8. 48m 34s
    1. Creating a custom basic wall type
      10m 18s
    2. Understanding stacked walls
      8m 12s
    3. Adding curtain walls
      8m 17s
    4. Adding curtain grids, mullions, and panels
      10m 59s
    5. Creating wall sweeps and reveals
      6m 26s
    6. Exploring model lines
      4m 22s
  9. 47m 40s
    1. Using object styles
      4m 19s
    2. Working with visibility and graphic overrides
      7m 3s
    3. Using view templates
      6m 13s
    4. Hiding and isolating objects in a model
      6m 37s
    5. Understanding view range
      7m 7s
    6. Displaying objects above and below in plan views
      6m 35s
    7. Using the Linework tool
      5m 21s
    8. Using cutaway views
      4m 25s
  10. 21m 28s
    1. Adding rooms
      8m 15s
    2. Controlling room numbering
      6m 13s
    3. Understanding room bounding elements
      7m 0s
  11. 33m 13s
    1. Understanding tags
      9m 58s
    2. Adding schedule views
      7m 55s
    3. Modifying schedule views
      7m 12s
    4. Creating a key schedule
      8m 8s
  12. 58m 40s
    1. Adding text
      7m 29s
    2. Adding dimensions
      9m 6s
    3. Adding symbols
      4m 42s
    4. Adding legend views
      4m 51s
    5. Creating a detail callout
      8m 31s
    6. Adding detail components
      8m 52s
    7. Using arrays to duplicate objects parametrically
      7m 43s
    8. Adding filled and masking regions
      7m 26s
  13. 41m 29s
    1. Understanding families
      2m 37s
    2. Creating a new family from a template
      6m 29s
    3. Using reference planes, parameters, and constraints
      7m 52s
    4. Adding solid geometry
      8m 40s
    5. Cutting holes using void geometry
      5m 9s
    6. Adding blends
      6m 2s
    7. Completing the family
      4m 40s
  14. 38m 48s
    1. Adding sheets
      7m 44s
    2. Working with placeholder sheets
      5m 24s
    3. Aligning views with a guide grid
      5m 57s
    4. Outputting sheets to a DWF file
      6m 39s
    5. Exporting to AutoCAD
      5m 42s
    6. Plotting and creating a PDF
      7m 22s
  15. 2m 38s
    1. Next steps
      2m 38s

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