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In Rhino 4.0 Essential Training, author Dave Schultze shows how the 3D NURBS-based modeling tools in Rhino 4.0 are used to engineer products from toy robots to full-sized aircraft. This course concentrates on using Rhino 4.0 for industrial design and rapid prototyping, with a review of common 3D terminology using specific examples. Along with a comprehensive exploration of the Rhino interface, the course includes an introduction to building 3D objects with Rhino's three primary entities: the curve, the surface, and the solid. Exercise files are included with the course.
In this video, we'll continue with a new technique for sharing and collaborating with others. This interesting command is called Make 2-D, and it's closely related to dimensioning. This might be considered overly technical and borderline unnecessary, but sometimes you will be asked to generate a set of 2D layouts or blueprints. If that's the case, you'll love how this works. The Make 2-D command is located on the Dimension menu right here towards the bottom. We are going to select everything in this scene and we just draw box around all the objects, right-click.
Now there is a lot of options here. I am going to recommend you just stick with the standard 4 View. I am going to turn off all these other options, and it's going to generate some new layers. So, I am just going to go with the defaults here. Now, this also will take a bit of time to calculate. It's going to generate a Top view, a Front view and a Side view as well as a Perspective. Since that's the case, you want to make sure that your Perspective view is exactly what you would want to export and share with others. So, I am just kind of move around and get a nice representative angle.
I definitely don't want to be straight on because that's covered by the Front viewport, likewise on the sides. So, this is called the 3 quarters perspective. I like to look somewhere around the middle of the object so let's just select all, that's Ctrl+A, go back to the Dimension > Make 2-D, and accept these defaults we've just discussed. This will take a while, so we'll cut into the completion. Okay. This is a pretty fast computer. It only took a few minutes. So, your results may vary.
We've got these curves generated. Note that they are on their own layer. Over here, we've got a brand new one called Make2D visible. I am just going to click somewhere to turn off the highlights, and let's check these out. These are extremely accurate. For example, I could actually put dimensions on here. I am going to do one quick one just to show you. I will just dimension from the width of the robot's head and there. So, you get total precision. However, there may be occasional gaps.
You'll see that right here off the bat there is no arc around there. You don't have the eyeballs and then on the Perspective view generated-- That's why we posed it. We are not seeing a lot of the surface intersections. For example, I am going to select this and zoom in a bit so you can see it. There is an intersection between this collar and top of the torso and nothing appeared there. That makes sense, because in the 3D model they actually go through each other. There is not a curve there or an edge.
So, I am going to show a little hack or two that will fix some of these problems. I am going to do it one more time. Another little tip though is if the item is missing are minor, you can go ahead and just manually connect the couple of lines. It's probably an easier way to go. So, I am just drawing a little polyline, snap, snap. Go back to the original model. We will start off with the last one I mentioned, and that's the intersection between the neck and torso. I am going to select both of those and introduce a new command here.
This is called a Curve From Objects, generates an intersection. So, I have already got them both selected and here is the result. Now we'll get an actual curve there. This is for visual reference only. This is not needed for modeling or any other reason, but a lot of times it will help the screen captures or this command work better. So, I am going to go ahead and do with maybe the antenna and the head. Let me go up here and right-click, and repeat it, and maybe the eyes.
I'll actually pick all three of these objects and the head, both eyes and the head. That's three, right-click, Intersection. Finally, the last hack I'll mention. If the Front view didn't really capture those corners there. So, I am going to take this curve and make a copy of it Ctrl+C and then paste, Ctrl+V, and just scoot that forward a little bit. I want to make sure it's not hidden or buried. So, from the Front view, I get that to show up right there on the edge.
Finally, I have one more intersection I want to make sure shows up. I am going to pick both of legs and both feet, right-click, and select Intersection, okay. Now I am going to go ahead and get rid of that prior Make 2-D command. So, instead of selecting everything, I am just going to go ahead and Delete that layer. There is a couple of lines. I am going to get rid of those as well. I'll re-pose, looks good.
Ctrl+A to select, go to Dimension > Make2-D, and we will be back when this is finished. All right. We are back. We have got the improvements done. Let's check them out first on the Perspective. So, here we can see some of the intersections that I generated earlier on the neck and on the feet. So, that's a big improvement there. However, this is not perfect. So, you are going to have to probably do some additional tweaking. I did get the eyes though so that was kind of nice. You can calculate the radius and just do a quick fillet.
Now the final step here would be to export this information to another application. For example, Illustrator or a drafting program like AutoCAD. One word of advice, make sure you are in the Top viewport when you do that. Also, the quickest way to get into trouble is select some 3D geometry accidentally. So, you definitely don't want to do that. So, I just want to select all these objects that I've just generated. What you can also do, by right- clicking on the Make2D visible layer, select those objects and go to File > Export Selected, and you have an option here for Illustrator.
I am not going to give it a name, but that would be the process. So, once again, make sure you are in the Top view, because Illustrator does not understand perspective angles. That will cause a corruption. Also, don't pick any 3D geometry. That will cause the same problem. So, to make 2D drawings, not for everyday use, to be sure, but if needed, it's an enormous time-saver. Even if your final goal is only a few rendered images or prototypes, I would still recommend generating these views with the view dimensions as supporting material for your documentation.
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