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Scan Essentials Basics
Scan Essentials - Model Preparation

Scan Essentials - Campus_2_Setup.mp4

0:04 Welcome back. Thanks for joining us as we continue to explore Scan Essentials. In these

0:10 lessons, we're going to go a bit further in modeling the fire station that was shown in the

0:15 introduction video. In doing so, we'll be able to talk about some guidelines, we think are

0:22 helpful and hopefully share a few tips and tricks when using point clouds. Keep in mind,

0:28 these are not lessons targeted at beginners of SketchUp. To best follow along, you'll need to

0:35 be familiar with SketchUp already. We'll be using basic tools like rectangle and push pull,

0:41 but also a fair amount of inference locking, when drawing or moving edges the use of groups

0:47 and components and creating arrays using scenes and tags to help structure the model. But with

0:55 that said, let's jump in. In the previous video, when I imported a scan, we chose this e57.

1:05 format. And it was converted by Scan Essentials into an .rwp file or a real works project. Once

1:15 your original scan has been converted, then open up the .rwp file from then on. Let's grab this

1:23 firestation real works project and open it. Depending on where you get your scans from, they

1:31 may be cleaned up and a lot of this extra information is culled out. In this case, we have

1:39 the file as it came straight from the scanner. But we're going to learn some methods to show

1:46 just the parts of the scan that we need. Now let's take a moment to examine the building and

1:53 kind of get our strategy for how we want to approach this model. In this case, we don't have

1:59 scans of the entire building, we're going to be modeling just this one side. And the first thing

2:06 we need is a good reference surface, it's going to be the basis for the rest of the model. I

2:15 think this large wall will be a good option for us. But we do want to capture as much of the

2:20 wall as possible for our reference. Here's what I mean. I'll draw one rectangle that is based

2:27 just over here on this portion of the wall. And draw another rectangle that starts near one

2:36 corner goes across all of these bays, and is based on the larger wall.

2:41 The difference between these two surfaces is not going to be much, but let's examine it. I'm

2:48 going to toggle the point cloud off. And I'm going to right click on this smaller surface and

2:54 choose align axis to match it to this surface. This will let me use the Scale tool to stretch

3:01 this surface across the full length of the wall. Now we can see both of these in comparison. And

3:10 again, the difference is not very much. But since the rest of the model is going to be built

3:16 off this surface, let's try to make it as accurate as possible by referencing the full

3:23 wall rather than a portion of it. Let me delete these surfaces and reset the axis. Okay, so

3:35 we're going to draw a rectangle that encompasses most of the wall. Let's use push pull to create

3:45 a box and bring the edges close to the corner scan points. As we start to create the model, we

3:53 can do some preparation work that will make our modeling experience far more efficient and

3:59 enjoyable. I suggest that we create some keyboard shortcuts. We've already seen that it's

4:06 useful to toggle the scan on and off. And we'll see as well that we can toggle the snapping to

4:14 favor the point cloud or the SketchUp model. For now at least there is a difference in what some

4:21 of these commands are called. For example, if we hover over the toolbar, we get an option to

4:27 toggle the scan off. But if we go up to the extension menu, this option is referred to as

4:35 showing only the SketchUp model. When you open up preferences and go to assign keyboard

4:44 shortcuts, don't reference the toolbar for names. Reference the extension sub-menu. Those

4:52 are the commands you'll find available. Keyboard shortcuts are a personal preference, so use

5:00 options that work best for you. These are the options I chose. Three different visibility

5:09 modes. I like using 50% transparency, and this blended mode most often, and of course, turning

5:18 the scan off completely. And I also set up a shortcut to toggle the snapping between the scan

5:25 points and the SketchUp model. The next bit of preparation is to create a new axis based on our

5:36 SketchUp surface.

5:43 And then I like to save this axis to a scene. In this model, we probably only need to save this

5:51 one axis. You may find in other models, it's useful to have multiple scenes and multiple

5:59 saved axes. When I save this scene, by default, it has all of the scene options checked. So

6:06 after creating it, I'll go back and turn off everything but the axis. Let's test our

6:14 preparation by resetting the axis and then using our scene to bring it back to our model. And

6:21 with our keyboard shortcuts, we can quickly toggle through useful visibility and snapping

6:29 modes. Now let's return to our model and create the basic massing of this fire station. I'm not

6:37 going to worry about being super accurate at this point, especially where the walls meet the

6:45 roofs as we'll come back and work on these roofs later. Depending on your model, you may be

6:53 building out walls and a lot more detail. I'm keeping this model pretty simple and just using

7:01 push pull and the Ctrl modifier key to pull out new surfaces and create the basic shapes and

7:08 heights of the main bay, the tower and so forth. It may be useful to create some of these blocks

7:17 as different groups. But this is a fairly simple example, so I'll probably keep this basic

7:24 massing as one group. With our overall walls complete, let's step back and talk strategy

7:32 again. In the next video, we'll be adding in more details and the roofs, but to finish out in

7:40 this video, there is one more part of the preparation that can be really useful when

7:47 modeling. We spoke at the beginning about refining how much of the scan we see. So let's

7:54 do that now. I'm going to edit our group and select the front tower surface. Right click on

8:02 it and choose 'Align view'. This places our view directly facing this surface. Now I'm going to

8:10 go use the scan essentials toolbar and choose the option Create Clipping box from Cloud

8:17 selection. This will let us draw a rectangular selection box in the model. Drawing this outline

8:25 creates a clipping box for the point cloud. Though you can see it does extend to the full

8:33 size of the point cloud. This clipping box is easy to adjust though, let's open up the Tags

8:41 window. When you create a clipping box, using the Scan Essentials tools, a new tag is created

8:49 so we can see the actual bounding box geometry. An easy way to adjust this box is with the Scale

8:57 tool. So let's scale this box down to focus on just the tower. Make sure you get the sides and

9:05 the full height of the tower as well. With the clipping box adjusted, I'll toggle this tag

9:12 visibility back off, and we can see how useful this might be in controlling how much of the

9:20 scan is shown. In fact, let's create one more clipping box. We can toggle the entire point

9:28 cloud back on by choosing this option: 'Deactivate Clipping Box' and now edit our

9:35 building group and align our view to this large surface. I may need to zoom out a bit but I want

9:43 to create another clipping box with this same tool by drawing a selection window. This new

9:51 clipping box is also assigned to the same tag so I can toggle it on it and adjust the size of our

9:59 clipping box with the Scale tool. Now that we have two clipping boxes, open the Point Cloud

10:07 Manager and under the clipping box flyout menu, we can toggle between these two views.

10:20 These generic clipping box names are not so helpful though, open the Entity Info window and

10:26 let's give the boxes better names. We have to be careful though. Do not change the tag or

10:35 definition name, that will break the clipping bo functionality. We can change the instance nam

10:43 though. So I'll select the tower box first. An I'll do the instance name. I'll just call i

10:48 tower and then click away from the name t accept that. You can see that is changed in t

10:54 e Point Cloud Manager as well. Now let's look t e building clipping box and change its instan

11:01 e name as well. And these names are much mo e helpful. Okay, that's enough for this lesso

11:10 , we've set our model up for success, we create a good reference surface that we've started

11:16 to build from. We based a new axis on that surf ce and saved it with a scene for future referen

11:23 e. And we've created and organized some point cl ud clipping boxes to help us control how much

11:31 of the point cloud we see. Also, we created s me keyboard shortcuts to help toggle the po

11:37 nt cloud visibility and snapping behavior. In he next lesson, let's start modeling out some

11:43 of the roofs. See you the