Today we are going to be using SketchUp to create some simple 3D drawings. To start off, click on the "Choose Template" button here. We are going to be working in meters, so select Simple Template in meters and then click "Start Using SketchUp". Before we get started, I am going to turn on some toolbars that we are going to want to see. Go to View Toolbars and I amgoing to add the Large Tool Set and the Views. That's going to make navigation work in SketchUp a lot easier. First, this guy here is for scale in the drawing. I am just going to get rid of him because he's a little distracting. I am going to make some simple blocks just to show you how SketchUp really works. I just selected the rectangle tool over here. I am going to bring it into the view area. I am going to start from the center of the universe here in SketchUp, the origin, and draw a rectangle. If I want to make it an exact size, I can type in the dimensions of it. I am going to make this one meter by one meter. These dimensions will pop up in the bottom right corner of the screen in the small box down here. Just type in 1,1 and click "Enter" and that gives me my rectangle. To add thickness to the part, I use the Push/Pull tool. Hover over a face and notice that it highlights blue. As that happens, you can just click and start moving that. You can either just eyeball it like this or type it in an exact dimension and it'll give you that. We now have what looks like a cube. Now one thing to realize with SketchUp is that it's not actually making a solid part like most CAD modeling programs do. I am going to turn on the Select tool, just the regular mouse, select this top face, and then just click "Delete". We see that we really just have a hollow box. All SketchUp is doing is creating planar faces and that's pretty much the basis of the entire program. Often, if a model's doing something unexpected, you will wind up with a hole in it. What that's usually caused by is from a face not being planar. Often you can just fix that by drawing a line across it and it will close the face. Erase the line with the erase tool, and your face is closed. To navigate around your model, the three main tools you're going to use are the Rotate tool, the Zoom tool, and the Pan tool. To rotate, click your scroll wheel and move the mouse around to zoom. You can just scroll on out with your scroll wheel. To pan, select the Hand tool from the Navigate tools over in the toolbar and left-click and drag, and that's going to slide your model back and forth. That's the basics of getting started with SketchUp. We are going to start drawing the chair. To start, we are going to go to the right view. Go up to the Center Views toolbar, click on "Right" and that gets us close to the orthogonal plan that we want to be in for drawing from the side. Then I click on the "Rectangle" tool. Come back over to the center of the screen, click on the "Origin". You notice the little yellow inference point appears. Then click and start dragging out the direction you want your rectangle to go and then type the dimensions, in this case, 0.5 meters by 0.5 meters. I type in 0.5,0.5, click "Enter" and the rectangle is created. We can zoom in for a closer look on that. Now we're going to add a back to the chair. I am going to go over and click on the "Line" tool, and start from this corner point. Notice it highlights the end-point to show that it's inferencing off of that. Draw up vertically 0.5 meters. Draw in the direction you want to get on, type 0.5, click "Enter". Then from the end here, we're going to go over 0.1 meters and then straight back down to the base. Next, we are going to add an offset from the outer edge of the chair that we are going to use to create the truss structure. Go over to the Offset tool of the large tool-set, and then as you hover over the face, it will highlight blue. Then click and start dragging inwards the direction you want to go and we're going to make this offset 0.1 meters. I type 0.1 and click "Enter", and that's created. Next, we are going to add a diagonal brace across the middle of the chair. I am going to start by drawing a line between the two corners. In this geometry, I am just going to use to set up what we are creating. From this point, I am going to draw up a small perpendicular line. Notice how it highlights pink. That shows that it's perpendicular to the line I just drew. I am going to make this one 0.05 meters and then draw along. It's going to highlight pink perpendicular to the line I just drew in. I can end it right at this edge here, and then do the same thing on the other side. It highlights pink. To draw the other line, I am going to go over here to this corner point, and it'll usually just highlight pink based on the line it thinks you want it to be perpendicular to. But if it doesn't, all you need to do is hover over the line you want, just have it snap onto it for a while, and then move back over and you going to get that perpendicular. So 0.05. Drag down. Yeah, it's here. Now I am just going to erase everything that I don't want here. I am going to go over to the Erase tool, in the large tool set. Then to use this, you can click on the lines you want or you can just click and drag through lines you want to delete. I am going to select the highlight blue and then disappear. Now everything is deleted here that I don't need. I am also going to delete the two faces in here that aren't really going to become anything in the model. I am going to use the Select tool and select those and click "Delete", and they are going to go away. Now we are ready to give the chair some thickness. Before that, we have got to delete one more little line here. This one, the back. Then we have one clean face to use. Now I'm going to rotate this a little bit, so we can get a better view of the extrude when we do that. Then go over and select from large tool set, the Push/Pull tool, and then hover over the whole face of the chair. It will highlight blue and then click and drag the direction we want to go. We only want to make this 0.02 meters thick. I type in point 0.02 and then "Enter" and so now our chair has thickness. We can rotate around, see what's going on. To rotate, we use the scroll wheel, click and then drag your mouse. You'll get navigation of your model. The next step is to make this part a component. A components are one of the most important things to use in SketchUp. Without them, you get what's called sticky geometry, which I'll talk about in a sec. Here I have a block and a cylinder that I made. They're not components, they're just individual faces. I'm going to triple-click and select this whole cylinder and then move it using the Move tool so that it intersects with the block here. Then I'm going to try to move it back out. There is a lot of weird stuff going on. What happens is the bottom edge of the cylinder has stuck to all the geometry of the block and it has dragged it with it. We can rotate around and see some craziness happening down here. Without making components, this is what's going to happen every time you move things together. If I have a set of components, which I have over here, the same two parts just made into components. If I click one, use the Move tool, I can move it to intersects and move it back out. Nothing happens. To make the chair component, double-click on it until the whole thing is selected blue. You usually have to click several times until everything is highlighted and then right-click anywhere in the model and select "Make Component". One of the key things here on the screen is to make sure that this box is checked. Sometimes it's not, and this replaces the selection you just have with the component. Otherwise it will create a component, but not actually change the part that you have. Then click "Create." Now the chair pieces are highlighted all in blue. It looks just like the normal model, but to edit it, you have to double-click and then you get this little gray box around the part and now you can work with it just like it's a normal SketchUp part, except that it's going to behave a lot nicer, and not stick to your other geometry. Once one side of this is made a component, we're going to copy it so we have two pieces of the chair. Just click on the component and then use the Move tool over here on the large tool set. Then you can just click anywhere on the model and it'll start moving. But we wanted to copy. Just go to your keyboard and click the "Control" key. Now SketchUp knows that we're trying to make a copy. If you're on a Mac, use the option key. Moving this part around is a little tricky. We're trying to get it to slide orthogonally to it. It's not, we've got that. You can see it's moving along the red axis. We have the red inference line going along. We want the chair to be 0.5 meters away. I type in 0.5 and click "Enter" and now we have two sides that are each a component. Next we're going to add some guidelines to the side of chair to add the cross braces. I am going to switch to the right view, so we can see the side nicely and then start drawing these guidelines. There is a lot of little lines here. The dimensions are in the handout. But I am going to go over here, 0.025 meters and then down 0.1 meters. If you're in the line tool and you want to start drawing lines again, but you don't want to start from this end point, you can just click "Escape" on the keyboard and you will stay in the tool, but it will forget about that last point you were on. The next part we're going to go from is down here, we're going to go up 0.025 and over 0.025, and then "Escape" and then same on the bottom corner. Now we have these three guide points that we're going to use to place the rectangular cross pieces. I am going to zoom in up at the top where our first one's going to be, select the Rectangle tool on the large tool set. I am going to start drawing from this corner of the line and draw it down. We are going to type in 0.1, 0.05. That's going to make the correct size rectangle here. Next we're going to offset it from the inside. First I am going to erase this line here and just delete that. Then go over to the Offset tool, large tool set. Hover over the edge, start moving in to make this 0.01 thick. I am going to rotate it so you can see the push pull that we are going to do next. First I am going to delete this middle face of the rectangle here, and then select the "Push/Pull" tool, hover over the section that we want to push and then start moving that. What I want to do, I want to make it stick to this opposite side of the chair piece. I don't need to go all the way through. We just click and it's there. Just as with the size of the chair, we want to make this a component so I can just click on it several times, like a triple collect basically. You know your component will be selected when it turns blue, the whole thing turns blue after clicking. Right-click, select "Make Component" and Create. Next we are going to copy this rectangular tube down the model and move a couple of places. Just like we did before with the chair, go over and click the "Move" tool and in this case, we got to be careful with what we are selecting when we go to move. I want to move this bottom left corner of the rectangle to this point down here. I am going to click on the bottom left corner of the rectangular tube. Click "Control" and then start moving down and snap it to the endpoint that I created down here. Next, we need to rotate this whole component 90 degrees, so that it'll line up correctly. To do that, I go over and click on the "Rotate" tool, and because we want to rotate it around this endpoint, I click on the endpoint first, then you can click anywhere out in space next to start the rotation, and then move the direction you want to go. SketchUp will automatically snap at 90 degree increments to make this easier, you can also, as with all the other dimensioning tools, just start moving in a direction and type the angle you want. In this case, I am just going to snap to 90 , and it's made. To make more copies of this, I am going to go back and click on the "Move" tool. First, I am going to pan the model down, so we can actually see the bottom of it here and then re-select the "Move" tool. We want to make another copy of this rectangular tube at the bottom, so I click and then "Control" and snap it to this bottom line. Next, we want to make several copies of these rectangular tubes moving forward. We're still in the Move tool, but I'm going to go to "Select" tool and select both of them, just with a click and then "Control" click. You can see that both the rectangular tubes are selected. Go back over to the "Move" tool, click anywhere on them, "Control" click and you slide it over, making sure that we are staying flatline this face. I'm going to move it 0.15 meters, so I type in 0.15 and Enter. I actually want to make not just one copy, but two copies, so then next you can just type in "2X" and "Enter", and it'll double that. Next, we are going to make some final tweaks to the chair. Let's just zoom out and look at the whole thing as it is. One thing you will notice is that when I created the rectangular tubes, when I pushed them to the opposite side, I made them just attached to this face, the inside face here, and not go all the way through. I would like to get that nice clean look on the other side as well. This is a great opportunity to see how powerful using components is. I am going to go to the Select tool, we are going to click on any of the components here I am selecting the top one and to edit it, we double-click. Everything else gets grayed out and we get this little gray box around this component. I am going to zoom in at the area of interest here. This is the face that I want to move a little bit, so I am going to select the "Push/Pull" tool, hover over the face, then slide it in. I could rotate around and see the other side, but what is easy to do is just inference off of the edge here. Notice this little red dot that appears and SketchUp is telling you that I am on an edge, and so I am going to select that. We can rotate around to confirm that we are in fact on that edge. To exit this Edit Component mode, just click anywhere outside of component we are in, and then we can zoom out, and you will see that the chair has the nice clean sides on both of the edges. The key with components is that by editing one of them, you've edited all of the copies you've made a bit. Since we edited one of the top tubes here, all the ones below it that we copied were edited as well. For final tweaks, I could go in and delete the little lines that I have used as guidelines here. Other than that, the chair is complete.
