Join Veejay Gahir for an in-depth discussion in this video The Hotbox interface (spacebar), part of Alias Essential Training.
- In this video, I'm going to show you another technique to move CVs and hulls, but using the Hotbox. We're going to go to our Transform CV option, make sure that's selected, and this time, very simply, I'm just going to press the space bar. With the space bar selected, you can see that we have exactly the same options as we had in the previous video. We have movement in XYZ, slide, projected, normal, parallel, and view. We can chose to move CVs or we can choose to move hulls. In the last video, we looked at, mainly, just the Move command.
But we're going to take a look at the other options for Rotate, Scale, Non-Proportional Scale, and Proportional Modification. Otherwise, everything else is exactly the same. It's just more of an icon-based interface, rather than double-clicking and opening up this interface here. In this case, let's go ahead, pick this entity, and press h to hide everything else. Alt l to reframe. We're going to work on just this surface data. Again, let's make sure this is selected, space bar, and let's go ahead and move to Hulls.
We're going to pick this hull at the very end. Just make a note of where the pivot point is. It's located at this very first CV. Space bar again. We're going to move to the Rotate command. Now, with Rotate, left mouse button rotates in the X direction, middle mouse button rotates in the Y direction, and the right mouse button rotates in the Z direction. Space bar again to activate the command. We move on to the next option here, which is Scale.
We click on Scale. Now, the way Scale works is that, if I use my left mouse button and I move it left and right, you'll notice that CVs will be scaling towards or away from that pivot point. If I move far enough, eventually, all those CVs will reside exactly on top of that pivot point. In other words, they gravitate towards the pivot point. That's how Scale works. Now, in this case here, whether I used the left mouse button, the middle mouse button, or the right mouse button, they all work the same, because scaling is just one particular function.
In this case now, I'm going to move on to Non-Proportional Scale. Now, with Non-Proportional Scale, let's click that. Now, one thing to note here is that all these CVs are in one plane. With Non-Proportional Scale, if I use my left mouse button, nothing happens because we're trying to scale in X, but everything is flat. So there's no scaling allowed in that particular direction. But if I scale in the Y direction, using my middle mouse button, you see with Non-Proportional Scale, that I'm scaling in the Y direction. If I move far enough, eventually, all those CVs will end up in a vertical line right on top of that pivot point.
The same with the Z direction, which is the right mouse button. So Non-Proportional Scale allows me to flatten, but in a particular vector. Again, space bar. We're going to now move on to Proportional Modification. Let's click this. Now, you'll notice we have another dialog box appears at the very top here. Let's go to the back, this time. Now, Proportional Modification works with CVs. I'm going to select a CV back here. You'll notice that we have these arrows appearing. Now, these arrows allow me to grab additional CVs in these directions.
I can grab three CVs in this direction, which is the indicator here. I have three selected. I can dial it back and select two or just the one. Same with this one here. I can dial it back and just select the one. This one here, I'm going to select the one. Right now, I've selected one CV in each direction from this particular control point. Let's see what movement we've got. We're in the XYZ direction, so if I go with my right mouse button, I can move up like this. Now, the way these CVs are behaving is dictated by the falloff.
So if I dial this right back to the left, you'll notice that everything moves at the same rate. Let's go ahead and grab some more CVs here to show you how this works. We'll zoom out a fraction. Now, with the falloff slider to the extreme left, if I move in a vertical direction with my right mouse button, everything moves pretty much at the same rate. If I dial it to the middle, now you'll see I have a more gradual falloff. This is kind of the desired result that I'd want to see in this particular application. I don't want to see a very abrupt change.
I want to see a nice, gradual falloff into the rest of the body of that surface. Again, if I control z and I move to the extreme right, I have very much isolated movement on that particular, let's say master, CV. Let's go back to the middle, space bar again. This time, what we can do is, we can select a CV on the end here. Where we select the CV becomes the master CV. Now, because I've got a corner here, I've selected two CVs in this direction and two CVs in this direction here.
But we could actually go ahead and select as many as we wanted to, like this. Then what I'm going to do is, I want to change to, let's say, normal. With my left mouse button, I can actually change like this, which is a very abrupt change for my liking. But if I change the falloff like so, I can change it to a lot more gradual change like this, which is more the desired result in this particular application. Now, the other option I wanted to mention here is that, when you're doing the Rotate function, for example ... Let's go back to Rotate.
If I pick this row of CVs here, or this hull, then I can actually move my pivot point because, if I want to rotate in the Z vector here ... Let's go to Rotate ... Z vector, you'll see that it's rotating in a very strange manner. It's actually rotating around this point. What I need to do is, I need to reset that pivot point. You can do this for any of the functions that we just talked about, simply by pressing the space bar, clicking on Set Pivot, and then, with my control, I'm just going to snap it to the end here. Now when I go to do my Rotate command, it's behaving exactly now as I want it to do.
Again, Step Size, Lock, and the mouse sensitivity works exactly the same as we discussed in the previous video.
- 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