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Creating revolves

From: Revit Architecture: The Family Editor

Video: Creating revolves

In this movie we will look at the Revolve form. A Revolve rotates a sketch shape around an Axis Line. The result is pretty similar to the effect of turning a form on a lathe and we did an example of that in the previous chapter. So we are going to take a little more detailed look at it right now. So as with the previous movie I simply have an empty Family file on screen here. This was created with Generic model, but you could follow along in really any template. All the forms work the same in any template file.

Creating revolves

In this movie we will look at the Revolve form. A Revolve rotates a sketch shape around an Axis Line. The result is pretty similar to the effect of turning a form on a lathe and we did an example of that in the previous chapter. So we are going to take a little more detailed look at it right now. So as with the previous movie I simply have an empty Family file on screen here. This was created with Generic model, but you could follow along in really any template. All the forms work the same in any template file.

The first thing that we want to do is decide, what's the most logical view to build this thing in. Now if I worked in Plan view, then I am going to be spinning around an axis that's going to be within the plan plane. It's probably, easier to just illustrate than to explain. So click on the Revolve form and you'll see that there are two buttons here: Boundary Line and Axis Line, and if you did the previous chapter than you have already seen an example of this. We have all the same sketch tools that we had for extrusion. So these are pretty common tools.

For this one I'm going do a simple Rectangle and I'm going to draw just in plan over here. Then I'm going to switch over to my Axis Line and you can either draw it or pick it. I'm going to draw it over here somewhere. Now when I deselect this, what you're seeing is the axis is here, the sketch is over here. So in order to spin this shape around this axis, it's essentially going to orbit around that line and you are going to get a donut shape or a ring when we're done. When I click finish, because we're working in plan and it spun around this axis, it's actually spinning up towards in and away for me, and when you look at it here in 3D, you see that I sort of have this ring shape that's been created vertically.

Elevation is probably the easiest way to see this in the Front Elevation. So the shape that we drew was here and it spun all the way around the axis that was right there. Now if you edit the form, you can edit either the shape or the Axis Line. So I could come in and change the shape, but I've got to make sure it's enclosed. If I tried to finish right now, I'm going to get an error. Just like we saw with extrusions, the revolves have to be closed shapes.

So I'll make sure that I snap that over here and I click finish and we still end up with the donut shape here, but now it's got a little taper to it, as you can see. It's following that new form that I created. Let's edit it again. What would happen if I took the Axis Line and moved it a little closer? Well, now I get a much tighter circle. Naturally, if I edit it again and move it further away, I get a much bigger ring, and perhaps I change the angle and you'll get a ring at another angle.

So you can see without changing Work Plane at all or really doing anything to the overall form itself, just by changing the Axis Line sketch or the sketch of the shape itself, there is a wide variety of possibilities. So part of the challenge when breaking down the form you're creating is to break it down into these simpler forms. Like to look at the object that you're trying to build in the Family Editor and think about which forms it should be constructed from and break it down into those smaller parts. So maybe you can use an Extrude for a little piece over here, and revolve for some other piece over there, and then when you bring them together you get the completed form.

In the Extrude we looked at the Properties palette and we saw that there were some properties. We saw there was Work Plane as we have here and I'm again using the Reference Level work plane. But now instead of a Start and an End Extrusion, I have a Start Angle and an End Angle. So I can do some interesting things right here. What would happen if I changed the End Angle to 180 degrees? Well now instead of getting a full circle, I get a half ring. I can put in any angle I like and get smaller and smaller chunks.

I can even put a negative and make it go the other way. The concept of work plane and the direction of the work plane that was discussed in the first movie in this chapter, applies here as well. The direction that the angle is going to be measured from is going to be in that positive direction of the work plane. If you want to reverse that you can use a negative angle. But you can do both a Start Angle and an End Angle. If I change the Start Angle here to 20 and the End Angle to -45, you see what starts to happen.

It starts down here, and then it goes past and ends up over here. So the work plane is in the middle somewhere, but by changing the two angles you can influence the way the overall form gets created. Then in a similar fashion to what we saw in Extrusions, these forms can also use multiple shapes. The same rules apply, as long as the shapes don't intersect one another. And now I've carved a hole in the middle of my form there.

So that's our Revolve form. A lot of similarities to the Extrusion, but it rotates along an axis rather than extruding along a straight path.

Show transcript

This video is part of

Image for Revit Architecture: The Family Editor
Revit Architecture: The Family Editor

63 video lessons · 7081 viewers

Paul F. Aubin
Author

 
Expand all | Collapse all
  1. 1m 51s
    1. Welcome
      1m 11s
    2. Using the exercise files
      40s
  2. 18m 29s
    1. Understanding family hierarchy
      2m 46s
    2. Understanding family concepts
      5m 23s
    3. Using models vs. annotation
      3m 33s
    4. Exploring libraries and resources
      6m 47s
  3. 39m 44s
    1. Kinds of annotation families
      5m 38s
    2. Creating an annotation family
      9m 41s
    3. Creating a tag family
      11m 50s
    4. Shared parameters for tags
      12m 35s
  4. 57m 13s
    1. The family creation process
      4m 4s
    2. Creating a new model family
      7m 6s
    3. Adding reference planes, constraints, and parameters
      8m 8s
    4. Adding geometry
      8m 4s
    5. Using instance parameters
      9m 27s
    6. Understanding work planes
      6m 52s
    7. Adding a revolve
      13m 32s
  5. 51m 2s
    1. Understanding reference planes
      10m 52s
    2. Creating extrusions
      5m 27s
    3. Creating revolves
      5m 15s
    4. Creating blends
      6m 46s
    5. Creating sweeps
      6m 47s
    6. Creating swept blends
      5m 25s
    7. Using void forms
      10m 30s
  6. 38m 55s
    1. Working with identity data
      3m 26s
    2. Adding family types
      3m 36s
    3. Creating type catalogs
      8m 6s
    4. Using material parameters
      8m 20s
    5. Sharing materials
      5m 27s
    6. Creating visibility parameters
      4m 45s
    7. Understanding subcategories
      5m 15s
  7. 40m 7s
    1. Understanding nested families
      6m 52s
    2. Building parametric arrays
      7m 17s
    3. Creating a family type parameter
      6m 45s
    4. Understanding shared families
      6m 57s
    5. Creating a profile family
      4m 54s
    6. Creating a parametric table edge
      5m 1s
    7. Modifying a profile
      2m 21s
  8. 16m 7s
    1. Understanding symbolic lines
      5m 29s
    2. Editing elementvVisibility
      6m 15s
    3. Ensuring the display of overhead items in a plan
      4m 23s
  9. 38m 13s
    1. Introducing complex families
      4m 42s
    2. Adding reference planes and importing nested families
      6m 36s
    3. Building arrays and applying rules
      5m 18s
    4. Adding formulas
      10m 1s
    5. Working with family type parameters and flip controls
      6m 22s
    6. Loading a model family
      5m 14s
  10. 17m 52s
    1. Tracing a view
      5m 49s
    2. Adding zones
      5m 33s
    3. Adding conditional formulas
      5m 4s
    4. Flexing the key plan
      1m 26s
  11. 38m 23s
    1. Understanding rotation in families
      8m 32s
    2. Building geometry on a reference line
      9m 21s
    3. Hosting a nested family on a reference line
      5m 3s
    4. Driving parameters for nested families
      3m 18s
    5. Shared parameters
      12m 9s
  12. 42m 19s
    1. Introduction to the arch family
      2m 42s
    2. Setting up reference planes and constraints
      9m 16s
    3. Locking down a curve
      8m 26s
    4. Working with advanced formulas
      10m 19s
    5. Creating a divided surface and completing the arch
      5m 37s
    6. Finalizing the arch
      5m 59s
  13. 49s
    1. Goodbye
      49s

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