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Using Boolean operations (Union, Intersect, Subtract)

From: Google SketchUp 8 Essential Training

Video: Using Boolean operations (Union, Intersect, Subtract)

Now let's take a look at how to actually use the Solid tools on objects. So let's go ahead and make a couple of solid objects. So I'm going to clear up my scene here and let's go ahead and just make another box. So I'm going to go ahead and sketch out a rectangle using the Rectangle tool and then select my Push/Pull tool and pull that into a box. And let's go ahead and create a cylinder as well. So I am going to select my Circle tool and then sketch out a circle something like this and then just Again, use the Push/Pull tool to pull that up, and I want to make it little bit taller than that box.

Using Boolean operations (Union, Intersect, Subtract)

Now let's take a look at how to actually use the Solid tools on objects. So let's go ahead and make a couple of solid objects. So I'm going to clear up my scene here and let's go ahead and just make another box. So I'm going to go ahead and sketch out a rectangle using the Rectangle tool and then select my Push/Pull tool and pull that into a box. And let's go ahead and create a cylinder as well. So I am going to select my Circle tool and then sketch out a circle something like this and then just Again, use the Push/Pull tool to pull that up, and I want to make it little bit taller than that box.

So now I have a two -- well, actually there are two collections of faces; they are not objects yet. So I'm going to go ahead and hit my Spacebar, use my Select tool to rubber band select the box. Right-click over it Make Group and let's take a look at our Entity Info. Yes, it is a Solid Group. This is good and let's do the same for the cylinder. So Again, Selection tool; left click and drag, make sure we've got everything in there, right-click, Make Group, and right-click, Entity Info, and yes, we have two Solid Groups. Great! So now we can use these to work with the solid tools.

Now you can find the Solid tools here; under tools>Solid tools, and there is also a toolbar here for Solid tools as well, and that's this toolbar here; I can actually pull that off here. So we have one called Outer Shell, Intersect, Subtract, Split, Union, and Trim. We're going to be able to these first three which are Intersect, Union, and Subtract. In fact, you can find them here on the menu here. So let's look at these first three.

These are basically the same as Boolean tools. So if you're familiar with 3D modeling at all, you'll kind of understand what a Boolean tool is or even if you're using Drawing pad such as Illustrator, they also have Boolean tools, which allow you to subtract curves from each other and these working very much the same way. So I'm going to go ahead and move this cylinder in towards the corner so it overlaps the corner of the box. I want to make sure it goes not only over the corner, but also goes below, this is why I drew that cylinder taller because I want overlap on all sides.

So now let's take a look at what we have here. We have a box and a cylinder and they are separate objects, and if we can view it through our Face Style>X-ray, you can see how they just overlap. There are no edges that define the intersection between them. So I am going to go ahead and turn this off so we can just see these. So now we can use the Solid tools to actually combine or subtract these objects.

I am going to select my cylinder, I am going to do tools>Solid tools and the first one, let's do Subtract, because this is the most obvious. So I am going to select Subtract and it's going to ask me for the second object. So if I hover over something that's not a Solid Group, it will tell me no and if I do hover over something that is a Solid Group, it will tell me. So all I have to do is left click on the box and now what we've done is we've subtracted the cylinder from the box.

So what I've done is I've actually used that cylinder as a cutting tool. So what I do is I select my cutting tool, select my operation, and then select my second object or the object to be refined. So I'm going to go ahead and hit Ctrl+Z or Command+Z to undo this and let's go through some of these other operations. So I am going to select my cylinder. Solid tools and let's this time do Intersect. Again, the same thing happens. So I select my initial object and then the object to be affected, and when I do that, it creates the intersection.

So let me undo this here. So if we look at what we have here, the intersection is where these two overlap. So when I do that, it basically just creates only those parts where those two objects intersect. So I'm going to go ahead and undo this again. So let's go ahead and select this and let's do one more. Let's do Solid tools>Union. Now what the Union does is it just combines them into one big object.

This, it seems like it didn't do anything, But and this is important, what it did is it created an edge along here, and really go back to where it was. So let's take a look at this in X-ray mode and this will give us a little bit better idea as to what's happening here. So what it did was, it actually deleted that part of the cylinder and the box that were overlapping and it created this nice clean intersection point here.

This is just another way of combining objects. So let's take a look at this in a more practical perspective here. I'm going to go ahead and open a file here called Solids_01 and this is basically just a box and a couple of -- they may look like bread loaves, but basically we are going to use these to cut arches into this box. So I'm going to go ahead and select this particular object here and I'm going to move it along the green axis.

So I am going to hold down my Left-arrow key and make sure I move this directly into that box, make sure that it's overlapping here. And let's go ahead and do tools>Solid tools>Subtract. So I am going to subtract this out of my box. So once I hit that, you can see I've made a very nice archway. Now we can do this again. So I'm going to go ahead and select this second bread loaf or whatever you want to call it and this time I am going to move it along the red axis by holding down the right-arrow key and Again, I just want to get that overlap right.

And this time, I am going to go ahead and select Subtract here from the toolbar and then Again, select my box. And so what I've done here is just by doing this, I've created a very nice archway into this object here. So you see how these Boolean tools; Subtract, Intersect, and Union can combine or subtract objects from each other to make more complex objects.

Show transcript

This video is part of

Image for Google SketchUp 8 Essential Training
Google SketchUp 8 Essential Training

88 video lessons · 27606 viewers

George Maestri
Author

 
Expand all | Collapse all
  1. 7m 18s
    1. Welcome
      1m 8s
    2. Installing SketchUp
      1m 12s
    3. Starting SketchUp for the first time
      47s
    4. Using the exercise files
      49s
    5. Tips for Mac users
      3m 22s
  2. 43m 52s
    1. Interface basics
      4m 42s
    2. Adding toolbars
      2m 38s
    3. Navigating
      3m 48s
    4. Changing perspective
      2m 51s
    5. Walking around
      3m 12s
    6. Creating camera views
      5m 15s
    7. Shading faces and edges
      7m 59s
    8. Creating shadows and fog
      5m 50s
    9. Creating Scenes
      5m 9s
    10. Setting preferences
      2m 28s
  3. 22m 19s
    1. Selecting and moving objects
      6m 25s
    2. Scaling and rotating objects
      5m 36s
    3. Manipulating faces and edges
      4m 8s
    4. Advanced selection tools
      6m 10s
  4. 48m 47s
    1. Line tool fundamentals
      5m 42s
    2. Refining objects with the Line tool
      3m 39s
    3. Using the Rectangle tool
      4m 44s
    4. Pushing and pulling faces into 3D
      5m 30s
    5. Creating circles and polygons
      6m 5s
    6. Creating arcs
      4m 0s
    7. Using the Offset tool to create outlines
      8m 33s
    8. Using the Follow Me tool
      3m 24s
    9. Softening round edges
      5m 16s
    10. Creating 3D text
      1m 54s
  5. 16m 45s
    1. Using the Tape Measure tool
      4m 41s
    2. Using the Protractor tool
      7m 16s
    3. Creating text labels
      1m 7s
    4. Using the Dimension tool
      1m 18s
    5. Creating sections
      2m 23s
  6. 20m 45s
    1. The Component window
      5m 32s
    2. Creating components
      3m 55s
    3. Using the 3D Warehouse
      3m 15s
    4. Importing from Google Earth
      2m 26s
    5. Using the Interact tool
      1m 54s
    6. Using the Component Options window
      3m 43s
  7. 25m 3s
    1. Grouping objects
      5m 42s
    2. Working with layers
      3m 27s
    3. Creating layers
      4m 20s
    4. Using the Outliner
      6m 42s
    5. Hiding and unhiding objects
      2m 48s
    6. Locking and unlocking objects
      2m 4s
  8. 41m 32s
    1. Using the Materials Browser on a Mac
      2m 49s
    2. Applying materials
      3m 2s
    3. Editing materials
      5m 4s
    4. Creating materials
      3m 19s
    5. Adjusting materials
      4m 38s
    6. Applying bitmap images
      2m 43s
    7. Mapping curved objects
      3m 39s
    8. Projecting maps on curved objects
      3m 27s
    9. Importing floor plans
      4m 27s
    10. Modeling with floor plans
      8m 24s
  9. 27m 11s
    1. Applying styles
      2m 26s
    2. Editing styles
      8m 30s
    3. Outputting 2D bitmaps
      3m 13s
    4. Basic animation
      5m 56s
    5. Advanced animation
      7m 6s
  10. 20m 40s
    1. Creating terrain from contours
      6m 22s
    2. Modeling objects with contours
      1m 42s
    3. Creating terrain from scratch
      3m 40s
    4. Sculpting with the Smoove tool
      3m 2s
    5. Stamping and draping objects on terrain
      5m 54s
  11. 15m 3s
    1. Geolocation with Google Maps
      3m 11s
    2. Using Photo Match to align cameras
      4m 30s
    3. Modeling in Photo Match
      7m 22s
  12. 59m 46s
    1. Using the Component Attributes window
      6m 41s
    2. Exposing component attributes
      6m 0s
    3. Using math and functions
      8m 49s
    4. Creating dynamic materials
      7m 2s
    5. Creating a dynamic staircase
      8m 52s
    6. Hiding objects dynamically
      2m 58s
    7. Configuring staircase rise and run
      5m 21s
    8. Adding interactivity: Motion
      5m 24s
    9. Adding interactivity: Rotation
      4m 55s
    10. Adding interactivity: Changing colors
      3m 44s
  13. 15m 58s
    1. Creating solids
      2m 25s
    2. Using Boolean operations (Union, Intersect, Subtract)
      6m 46s
    3. Working with Trim and Split
      4m 45s
    4. Creating outer shells
      2m 2s
  14. 21m 28s
    1. Importing objects from AutoCAD
      6m 40s
    2. Importing other 3D objects
      3m 8s
    3. Exporting objects
      5m 39s
    4. Exporting objects for rendering
      6m 1s
  15. 14s
    1. Goodbye
      14s

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