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In this course, author George Maestri explains how to model and render 3D objects and scenes using Google SketchUp 8. The course covers the fundamentals of the application, from navigating the user interface, manipulating objects, and building basic shapes to importing objects from Google Earth, animating a scene, and modeling organic terrain using the Sandbox tools. The course also explores SketchUp Pro features, which are available as an upgrade. These include tools for creating dynamic components and adding interactivity, as well as sophisticated importing and exporting options for working with outside applications.
Up until this point we've been working mostly with Rectangles and Boxes and that sort of thing, but SketchUp also has Circles and Polygonal tools as well. There are two tools we want to look at today and that's the Circle and the Polygon tool. So those are under the Draw menu, we have Circle hot key of C, Polygon with no hot key. And these are also found here are on the toolbars. So let's go ahead and clear out our scene, I am going to select this person and hit Delete and then let's activate the Circle tool.
When you do that notice how it's just a pencil over circle, pretty self-explanatory. So all you have to do is left-click and drag and left-click Again, and you have a Circle. Okay, with the Circle tool you can type in measurement, so you can type in a radius. So if I want I can left-click and drag and then just type in the radius. So if I want a 2 foot circle I can just type 2 feet and it will create that. Also remember when you draw a circle it will infer and snap when you're parallel to the green, the red or the blue axis.
So if I want all the centers of this to be concentric it helps me, it'll make an inference for me in doing that. Now let's take a look at the Polygon tool, it's also very similar to the Circle tool. So if we select the Polygon tool it will go ahead and allow us to draw a polygon. Now notice here on the bottom it says Sides 6 that tells me we're going to draw a 6 sided object or a hexagon.
So all I have to do is left-click and drag, and then If I want as I drag I can rotate this around to get this oriented the way that I want and also drag for size and then when I click the second time it blocks it in. So just like with the Circle I can type in a radius, so if I want to I can select this and let's say I want a 2 foot hexagon, I can do that as well. The other thing about this is that we can also change the number of sides, let's say you don't want a hexagon, you want a triangle or an octagon or something like that.
So you can also change that. Now in order to change that you have to reselect the Polygon tool, this is a way you get that number of side. So I am going to hit spacebar, go in to Select mode and then select my Polygon tool again. And now the number of sides comes up, so let's go ahead and type in 8 sides and enter and notice how that changes to an octagon. So now all I have to do is drag that out if I want I can type in the radius However, I want and there is the octagon, if I want a triangle Again, after reselect the tool, select this and let's say I want 3 sides, change this to a triangle and now I can draw a triangles, very-very simple.
Now you noticed how these tools actually work very similarly. In fact, they are pretty much the same tool. I am going to go ahead and clear this out because let's take a look at the Circle tool again, when I click on the Circle took notice it also gives me a number of sides. So In fact, the Circle tool is just a Polygon with a large number of sides, so I wanted to I can actually reduce that, I could say I want 6 sides and it'll go ahead and make a hexagon and if I go over here and select the Polygon tool, do the same thing let's say I want 6 sides I could draw another hexagon.
You can say well you know that's pretty much the same object, is there any difference between those? The difference comes in when you actually extrude these into a 3-D shape, so I am going to go to my Push Pull tool and I'm going to pull my circle-based object up, and then I'm going to go ahead and pull the polygon one up. And if you notice the difference is that one has edges on the slides here and this one doesn't and so that's the difference is that this one will create hard edges when it's extruded, this one will create soft edges.
Now you'll notice this a little bit more when you up the number of sides. So let's go ahead and redraw this one more time. I am going to go over to my circle and I am going to put it back up to 24. So with a 24 sided circle when I pull this up you are going to have basically a very cylindrical shape. If I do the same thing with a polygon, so let's type in 24 sides and Again, just sweep out an object here, and then I'm going to select my Pull tool, pull it up you can see the difference.
So that's really why we have a different Circle and Polygon tool. Now this goes even further if I want to push and pull a face I can do it on this one here because I have edges from which to pull. I can't do it on this curved or smooth surface that you get from the circle. So that's the big difference, you cannot extrude a smooth surface because it doesn't have edges, it doesn't have flat plains. On this one these are all flat so it knows what direction to pull; it will pull perpendicular to this.
With this face here there is no perpendicular. You can pull the top one here because Again, that's flat you can only push and pull flat faces. So those are some of the differences between the Circle and the Polygon tool and I'm sure you can find a number of different ways to use these to create all sorts of interesting objects.
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