Rhino3d for Mac Tutorial Series - Curated by Simply Rhino to help you get started and learn Rhino on the Mac platform.
This is the video transcript, published alongside the video, to further support your Rhino learning experience.
Hi and welcome to Simply Rhino for Mac Tutorial series. In this tutorial I’m going to create an object using circle, curve, arc, line, Boolean, polar array and then solid extrude plane curve straight.
Now this is the resulting object that we’re going to create. So I’m just going to hide it and then we’ll recreate it. So let me hide all of those curves too. So we can create this all in the top view. Now let’s start off with a circle. Come across to the left here, press the Circle button. Now it’s asking me in bold for the centre of the circle. Shortcut to the origin in zero, so just typing in zero will place the centre of the circle at the intersection of the x and the y axis. Now I’ve got a smaller circle in the centre here and I know that its diameter it 1.5. So if I click on diameter, it means that Rhino will accept a diameter output. Now the outer circle here I know is a radius of 3. So I’m going to come up and click on Circle again and this time, it’s asking me for centre of circle, so let’s place it. That’s zero. Now if I click on radius, it just means the input now, Rhino will accept a radial input. So I’m going to type in 3. Now I’m going to create an arc here or a semi-circle and I’m going to achieve that by clicking on the Arc button here. Now the default method is via the centre of the arc. Now I know that I can find the centre of the arc by using some absolute co-ordinates. I know if I type in 1.75, 0, that will give me a placement for the centre of the arc. Now I know that overall, the diameter is 0.75, but if I was to type in 0.375 which is half of that value, you can see I can, this is actually distance angle angle constraint that I’m using within the arc command. I’ve defined a distance. Now in order to confirm the orientation I need to hold down the shift key to make sure that’s vertical and make a left click. I’m going to sweep my arc down and holding down the shift key again, I make another left click.
Now I want to draw a line from the end point here horizontally at the point and then complete that line and then it’s intersection with circumference of the circle. So if I just type in LIN, there’s my line command. So I choose that, press enter. Now I need to find the end point of this line here. So I’ve got my object snap end on so I make a left click. Now, I need to find the intersection here and I’ve got intersection here on in my object snaps, but it’s not identifying it as yet. It’s not until you hold down the shift key that will be identified. So I’ll just repeat that. I find the end, move over to the circumference of the circle, hold down the shift key, left click.
Now I’d like to create a copy, a series of copies around the centre of this object and I’m going to achieve that by using the command array polar. Array meaning orderly arrangement. I make my selection of my three curves, I come up to the top here and I go to transform, array, polar. Now the first thing it’s going to ask me for is the centre of the polar array. The shortcut to the centre will be of course zero, enter. Now it’s asking me here, number of items. That’s correct, I’ll accept that by pressing enter, six. Now it needs to know the angle to fill or reference point. So if I press enter it will accept the value that I have typed in to this box here, 360, meaning full circle.
Now they haven’t turned yellow yet which means I’m looking at a preview. So I need to press enter to accept as stated here in the top left hand corner. Now I can make changes here. I can increase the number if I wish, but if I press enter, it will create those arrayed objects.
Now what I need to do here is, I need to trim away these parts of the circle here where these curves meet. Now I could travel round the circle using the trim command in order to achieve that. Alternatively, what I could do, I could come up to the top here, choose Curve, Curve Ending tools and choose Curve Boolean. In a previous exercise, we saw a Boolean command being used on solids. In this case it’s being used on curves. Note that my delete input here is set to all. Got a few, none or all. I’m going to use all. Now it asks me to accept curves. I’m just going to drag a window around all my curves and press enter. It now asks me, click inside regions to keep. If I left click in this space here, Rhino will give a preview of what it’s going to leave me with. That’s fine, I press enter. You see what it’s done? It’s an automated trim. It’s taken out those parts of the object, very useful part.
So let’s take advantage of the fact that my new set of curves is selected by coming up to the top here, selecting Solid, Extrude Planer Curve, Straight. So this is going to turn these into a solid. Now, it’s going to ask me in bold here for Etrusion distance. This is the thickness of the object that I’m just about to create. Let’s move in to the perspective. Now if I press enter now, it will accept the default value of 1.
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