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Follow Me -Lathe

SU Fundamentals 11-2 Follow-Me Lathe

0:03 If you are following along with our example file, we are now on the 4th tab.

0:08 Previously, we learned that the 2 ingredients needed for Follow Me are a path and a surface or shape.

0:17 With this in mind, if you create a round path, you can use that circular path to lathe or rotate forms,

0:28 such as this glass, this jar or.. a donut.

0:34 The steps are the same as we’ve seen before.

0:38 The preferred method is to select the path first, which can be the edges or the surface.

0:44 Then choose Follow Me, and click on the shape to finish.

0:49 Work through these examples yourself, noting again that the distance of the shape from the path is important.

0:56 For the wine glass, the jar, or the lightbulb, we have half of the shape created and centered on the circle path.

1:09 For the donut or ring, the distance from the path center will determine the results.

1:16 Undo, move some shapes around to change the results and when you are ready, move on, to the next scene.

1:26 These examples are set up to show how the results vary based on the number of segments in your path.

1:34 They also show the difference when you use a circle or a polygon.

1:39 Remember that a circle when pulled into a cylinder is smoothed and a polygon shows the segments.

1:45 This is true when you use Follow Me as well.

1:49 The results will be automatically smoothed when using a circle as the path,

1:55 or will show the segments when using a polygon as the path.

2:01 For both polygons and circles you should remember that you can change the number of segments.

2:07 Here, we have 3 polygons, one with 5 sides, one with 8 sides, and one with 12 sides.

2:15 The Follow Me results will also be based on the number of sides in your path, which we can see by completing these 3 examples:

2:23 5 sides.. 8 sides.. and 12 sides..

2:29 The idea that you can change the number of sides is important not only for the path, but also for the shape.

2:38 Let’s move to the next scene, and learn about something called: Level of detail.

2:45 We have some similar wine-glass examples here, but let’s zoom in and examine some of the arcs and circles.

2:54 I’ll right-click on an edge and bring up Entity Info so we can see the number of segments.

3:01 This first example was created with the default number of segments, so the circle has 24 sides and each arch has 12.

3:12 In the 2nd example, we drew the circle with 16 segments, and have also drawn the arcs with less sides,

3:20 especially the shallow or small arcs.

3:28 In the 3rd example we increased the circle to 36 segments, and also increased this outer arc from 12 to 18 sides for more detail.

3:39 Now, let’s use Follow Me to build each glass.

3:45 As you’d expect, the glasses with more arc and circle sides result in smoother detail, at least when we examine them up close,

3:55 but here’s the important distinction.

3:58 When we zoom away, the differences between these glasses fade.

4:03 It becomes increasingly difficult to tell them apart, the added details are not so important.

4:11 However, if we were to triple-click on each glass with the selection tool, it will highlight all the edges and surfaces we’ve created.

4:20 Now look at Entity Info to see how many entities are in each glass.

4:26 Our lower-resolution glass has close to 2000 entities, and our highest resolution glass has almost 10,000.

4:35 Five times as much detail, and yet, from a few feet away, we can’t really tell much difference.

4:44 While this may not seem so important for 1 or 2 glasses, imagine that you've modeled a restaurant...

4:49 ..with all the tables, chairs, and now you’ve made 100 copies of this glass and 100 copies of highly detailed plates and bowls.

4:60 Now your computer is trying to keep up with all of this detail,

5:03 but even the fastest computers cannot keep up with how quickly you can multiply geometry in SketchUp.

5:11 There is no rule for every scenario as to how much detail you should create,

5:17 but generally, just be aware of the level of detail in your models

5:22 and try to create lower resolution models whenever it’s appropriate.

5:28 By the way, did you notice the differences between the legs of this table?

5:33 Each of these legs was built with a different level of detail,

5:37 as another example that you should be changing the number of segments in your arcs and circles to control the level of detail.

5:47 In our next and final lesson on Follow Me, we’ll give you a few tips for creating your own models and some practice examples.