Good point. A fail idea of mine, I see :P

Hmm, I guess you can already specify some numeric input for the move command...

Maybe this is enough after all.

Hi NightCabbage, well it is something requested quite a bit I guess because people are used to it from their animation program.

But it's not something that's commonly done in a CAD program because it's often not really an accurate thing to just set the position of some totally arbitrary point.

But yes with the Move command you can set the exact position of whichever specific point of the object that you want - for the first step of the Move command snap on to the point on the object that you want to position, and then for the target point you can enter in an x,y,z coordinate. I think in MoI v3 I'll also be adding an option to the Move command to let you use the centroid of the object as the "from" point.


Rotation is kind of a similar thing - a generic object just doesn't really have a specific rotation, for example what would you say is the current rotation of this shape here:



Similar to "position", rotation is something that just is not a built in natural part of geometry (other than with simple unmodified primitives like a cylinder or something), it is something that has to be tracked by some kind of local axis type system.

Those local axis systems are great for animation, but for modeling only there is a lot of potential for them to get in the way.

Like for instance I know one CAD program that used a local axis for things, and it was pretty weird - every time you drew a line it would ask you to pick 3 points, one for the start of the line, one for the end of the line, and one for the "axis point". It's kind of inconvenient to make all kinds of extra picks like that when you're just trying to draw something... If you were trying to make the lines fly around, then having markers like that would start to serve a much better purpose. Of course MoI is focused on drawing and modeling and not on animation.

- Michael

NightCabbage,
You can acheive your poor mans Bounds data with 2 commands in MoI. "BoundingBox" and "BoundingBoxCenter".

If you use these while you create your objects, then use the object managment system to group these 2 things to be selectable as one, then you can manipulate your objects with these values. (Just no GUI).

FYI

Thanks guys :)

Michael - yes, I guess I was thinking that each object could have a local axis, with a "center point" - which would, by default, be the center of the whole object, but you could also move it to any other point on the object.

Having a centroid, as you said, in the exact center of the object would be handy - I'm often needing that, and the BoundingBoxCenter command is a little bulky to use (and then you need to delete the point, etc.)

Hi NightCabbage,

> Michael - yes, I guess I was thinking that each object
> could have a local axis, with a "center point" - which
> would, by default, be the center of the whole object,
> but you could also move it to any other point on the
> object.

Well, that implies quite a lot of things to support that - extra stuff being drawn on the screen, extra UI to manage that local axis separately from the object, you may be surprised at how much impact such a thing would have.

It's pretty easy for all that stuff to actually have a negative impact, basically anything that adds clutter and complexity can have some negative consequences to it.


> Having a centroid, as you said, in the exact center of the object
> would be handy - I'm often needing that, and the BoundingBoxCenter
> command is a little bulky to use (and then you need to delete the
> point, etc.)

Yeah, that's why having it as an option in the Move command could be handy.

Do you have an example of a situation where you needed it? Note that there is also the Transform > Align command which does allow you to center an object at a particular spot in a 2D sense, does that help do what you need?

- Michael

Perhaps it's a legacy of my background, but I often find myself wanting to position and rotate objects from their center points :)

Probably my default way of working, unless I want to align something with an edge of another object, etc. (whereupon the default MoI style is perfect)

Sorry Michael, I feel like I've been asking for so many feature requests over the last 24 hours! Just thought I'd post some of the things I'd been thinking about since learning MoI :)

Hi NightCabbage, well for rotation if you use the edit frame in a 2D viewport, that will rotate around its center point.

For example here I am rotating a box by using the rotation grip on the edit frame, notice how it rotates around its center:



Does that do what you want?


It would probably help me a lot if you could post some example models that showed me some instances where you wanted to do some of the things you are discussing, like move an object by its center point.

If you just want to move an object over a bit arbitrarily, you can grab any point to do that, you don't really need the center specifically for just pushing it over a bit or stuff like that.

If you want the center to align with other things, the Align command could probably do that job for you.

It's also possible to grab the midpoint between 2 points as the source for Move by using construction lines, maybe that would help you out in some circumstances.


But it is difficult for me to know for sure because I don't really understand the particular situation that you're running into - if you could show me an example model that would help me understand more specifically what you are trying to do.

- Michael

< For example here I am rotating a box by using the rotation grip on the edit frame, notice how it rotates around its center:

And if you Click on the "rounded arraw" you can change the axe of rotation ;)

Ah, I didn't know that, cool! :)

And of course that works in 3D ;)