Join Veejay Gahir for an in-depth discussion in this video Annotations and measurements, part of Alias Essential Training.
- Let's take a look at how we can add annotation and some measurements in Alias. So the annotate and measure commands create something called locators. We've already touched on locators. The downside of using locators is that when you press the l or delete locators, it will delete all of the locators. So if you have some annotations applied then you go ahead and you do some curvature analysis, when you're done with your curvature analysis and you press l, you're going to delete everything, even your annotations are going to go.
So just bear that in mind when you're using this command. So let's go ahead. At the very top we're going to go to annotate, and let's go ahead and pick this piece of data. I'm going to put a locator right here. At the top I'm going to type some text in. So put in fender, return. So at this point I'm just going to go straight to control five, and let's take a look at this information. So it tells me that it's located on a mesh point. I can change the text.
Enter. I can change the justification to right. I can make it visible in all windows or the current window. I can change the font properties from default to custom. Now the default font properties for this right now are set by Inventor. If I go to custom and I want that font to be bigger, I can just go up to something like this, like to 18. Let's go up to preferences, construction options, and if you look at Inventor and we look at, let's just open up all of these options here, and you can see right down here we have the option for fonts.
Right now they're set at 10. Now if you wanted to do a lot of annotations, but you didn't want to go in and modify each one of these, you could set this to be a default of 18, but you can't set it in Inventor because you can see a lot of this is grayed out. So what you'd have to do is select Inventor, click on copy, and this would be your custom. I would just say copy like that. Now you can go back down to the bottom, the fonts, and we can change that to 18. So it retains all the tolerances that you would use for constructing Inventor type surfaces or Inventor tolerant surfaces, but now you've overridden the font size.
Again, as I mentioned before, if you have annotations here, you can go ahead, you can move the locators, move like this, but if I move this locator down to this location like this and I now go and analyze this curvature of this particular piece of data, I'm looking at this, I'm like, okay, I'm happy with that, I'm done with it, press l, everything is going to go. Okay, so let's take a look now at some measure functions. So let's measure distance. The options are true and projected.
So let's go with true first. I'm going to control alt, left mouse button on this point here, and then also on this point here. I'm going to go left mouse button on this point and then middle mouse button on this point, left mouse button, and then right mouse button. So you can see we have true vertical and horizontal. So let's go ahead and move those locators out the way. Like that. We're going to go back into measure distance, and now we're going to go to projected.
So let's do the same thing. Control alt, left, left, left, middle, left, and right. So let's go to move locators. We'll move this over here. This one can move down to here like that. On this one, let's just move it up. So you can see the difference between projected and true can be very slight, but there is a difference. In fact, in this one here you can see 69.78 and 69.51.
That's because this curve is very flat, but there is a slight bit of curvature in there. So let's just delete those by pressing l. Let's move over to angle. So with angle, again, we have true and projected. Now with angle you can just eyeball in space an angle like that. What we're looking for is three points. Let's press l. If I select a piece of data, for example this front mesh, now I'm locked into that mesh. So I could actually pick this corner, this corner, and this corner.
Then I've got an idea of what the angle is in that particular region. So let's go back into radius. Now with radius I can pick on a value like this and I can keep multiple selections along the curve like that. Let's see what move locator does. Move locator will allow me to move that locator around and reposition that particular analysis like so. Let's delete that.
Gonna be in measure, diameter. Now if I click on this particular curve here, it's not going to give me a value because this is not a true circle. It's actually a curve that's been manipulated to capture that opening. So we can go into curve, we can go to curve key points, and we can select a curve like this. One of my favorite ones is to go three point curve like that, one, two, three. With a three point curve like this, let's see if we can get a value for the diameter.
So we're going to go to locators, measure, diameter. On this one here, very easy. On this one here, it's not working because we actually have a partial arc. Let's delete those. Let's do it again. We're going to pick this one at the back here. Again, you see that we can't pick a diameter for that particular entity. It's not an enclosed entity. This one here we can. So just be aware that you have to have an enclosed circle to get a true diameter reading, even if it is a three point circle.
So let's delete that. We're going to delete this entity and this entity here. The next one we're going to go to is arc length. So again, let's focus on this particular entity here. I'm going to click on this, and as I slide this locator around, I'm getting a feedback on exactly where I am on this curve. So that's parameter zero, and all the way to the other end, we have parameter one. So I can measure between this point here and this point here. So between zero and let's say roughly .2 we have an arc length of 220 millimeters.
So that's how arc length works. But again, l will delete all of those values for you.
- Manipulating views and entities
- Working with layers
- Creating curves
- Sweeping, extruding, revolving, offsetting, and blending surfaces
- Modifying geometry
- Moving, scaling, flipping, and rotating objects
- Trimming curves and surfaces
- Creating copies of objects
- Aligning, combining, and splitting objects
- Analyzing geometry
- Shading models