Michael tried your solution - alas, it is a little what I thought.
To illustrate his thoughts would show a picture.

Maybe the free DesignSpark Mechanical (who has drawing with constraints) can help you ?
http://moi3d.com/forum/index.php?webtag=MOI&msg=6186.1

Dear Frenchy Saw, I understand that you recommend to leave alone MOI3D and switch to another product? What's the point?

Just pick functions that not yet existing (dimensions) or weak in rare situations (fillets) !)
As gobetween is very easy : Step - Sat as shown in my previous link! :)

Dear Frenchy... I'm afraid we're talking about very different things.
Or I do not understand what you want to tell me your answer, I'm sorry ....

Just that from your image/Rig that you shown, (who don't work in Moi) i believe you can make it with the prog quoted above! :)

Incredible! )))
1. You are asking me to model in MOI3D,
2. When do I need to turn a group of related objects in some corner, you offer me to go into some other program (I do not know) and continue there
3. Question: what is the point of MOI3D? After the program, as recommended by your model can be successfully done from the beginning?

How do you imagine the very sequence ??

And if we talk about third-party programs, that is, that's an interesting - Onshare.

http://www.youtube.com/watch?v=voEtTcWuHG8

It perfectly realized modeling techniques, of which I spoke.
But it oznachat you need to get away from MOI3D and learn other software and it design your work. The point?

PS. By the way, just such wonderful callouts with dimensions as shown in the video above, it is not enough to MOI3D. Alas.

I had understood that you want modeling something with constraints for make some rigging adaptations
and that Moi don't realise that! :)

<<Onshare ?

Onshape yet commented here! ;)
http://moi3d.com/forum/index.php?webtag=MOI&msg=7302.1

Not really.
I would like to understand whether it is possible in principle (hypothetically) in MOI3D through plug (as in sketchup, for example), the implementation of this feature.
Or the engine program that does not natively support, and does not allow for.
That was the question)))

I suppose quasi all is possible but must ask some many times to make! :)
(and of course a very solid knowledge of developpment! )

See the plugins of Max Smirnov for example! :)

Hi krass,

> I would like to understand whether it is possible in principle (hypothetically) in MOI3D through
> plug (as in sketchup, for example), the implementation of this feature.

I guess anything is theoretically possible - maybe with several years of full time work someone could build some enormously complex scripting layer that would do that.

But to be practical a constraint mechanism like that would really need to be more built in to the core of MoI.

It is something that I want to add in the future but there is a lot of work involved and so I don't know when it will happen. MoI is currently much more focused just on trying to make the initial drawing of things to be as fast and fluid as possible and the focus is not on that kind of post processing editing that you are describing.

There are other programs out there that are more focused on doing that kind of editing, so if that's an important function for you using a different program that has prioritized that type of workflow would be a good idea. The tradeoff will be that programs that are heavily focused on parametrics and constraints will require you to do more planning and setup work for your drawing and you won't have the same feeling of free drawing as you do in MoI.

Another program that you might want to check out which is very focused on constraint editing is SolveSpace: http://solvespace.com/index.pl

- Michael

Michael, thank you very much for the detailed answer!
I like MOI3D so that I will somehow get along without these functions for them to move to another platform simulation! ))))

Yes Solvespace is cool (I have made its French Site :)
http://solvespacefr.weebly.com/

But free DesignSparks is more ergonomic :)
What do you want more simple for constraint something ?
As soon as you can see a "Star" you can edit if you are in compatible constraint!



In 3D the same!

I'm sorry, I can not understand what relation DesizhnSparks has to rigging objects?

This is not like some Kynematic ?

Hi krass,

> I'm sorry, I can not understand what relation DesizhnSparks has to rigging objects?

Normally in CAD programs the type of thing you're looking for is called "constraints" and not "rigging" which is usually what it's called in animation programs.

Pilou is showing some of SpaceClaim's constraints mechanism there.

Maybe I have misunderstood what you are trying to do - I thought you wanted to edit the endpoint of a line for example and have the drawing change to accomodate the movement while keeping various measurements that you specify to stay the same, like same length on various other lines, tangency kept to a circle, etc... That's usually what is meant by constraints in a CAD program.

- Michael

Michael apparently really we mean different things.
I mean here that: the simulation of complex and interrelated systems there - sometimes - the need to change their state so that all elements of the system were changed "as a whole".
Once again I give as an example of this video: http://www.youtube.com/watch?v=9vU2MMc-woM

For example, when modeling such a robot, I want to change the position of a moving part which is connected with the other moving part, and that - the third ... and so on.
In a typical approach is necessary to move all the details manually, while calculating what position will take each of the parts after moving.
Here I am about anything!

An even more obvious example:
http://gerald-massey.org.uk/Railway/images/Development/Walschaerts.gif

Suppose I modeled all the elements of the propulsion unit and are arranged according to some of its provisions.
But.
Then I needed - for example - change the position of the drive wheel. What happens then?
I need to change the layout of all components in accordance with the new position of the wheel, right?

And I'm trying to understand whether it is possible to realize (in principle) any improvement to solve this problem.

Hi krass - so yes in a CAD program such a thing that you are describing is called "constraints" - you have to set up the constraints by assigning different types of them to individual features of your model, like you can tell it that a line should remain some certain fixed size, that another line should be tangent to a specific circle, and that there should be a 45 degree angle between 2 lines in another corner of the sketch. Then after those constraints are set up, you edit some piece of the drawing like move an endpoint or change the length on an unconstrained line, and then the rest of the model updates accordingly to enforce the constraints that you specified.

Pilou's examples above show some of that in practice, with other pieces of a sketch getting updated in response to an edit.

But typically in CAD programs functions like that are called "constraints". SolveSpace that I linked to above is one of the easier programs to mess with constraints because it's a very central focus of the program.


> And I'm trying to understand whether it is possible to realize (in principle) any
> improvement to solve this problem.

It is possible, but it will take a very significant amount of time and effort to do it, and the amount of interaction between the constraints and the overall platform makes it difficult for an external script to implement it. At this moment the best way to get that functionality will be to use a different CAD program in combination with MoI.

That type of functionality just has not been a focus area for MoI as of yet.

- Michael