< The new snap enables you to snap on to these for the first pick of a drawing command
Sorry but on my computer it's not working ? Only the straight Snap!

Hi Val, thanks for the feedback,

> So far I don't see any use in the axis snap, as far as i can tell it can
> only snap to axis extended from the origin,

Yup, that's all it is. But these are pretty strategic areas to snap on to for several kinds of simple symmetrical shapes.

For example if you watch the video tutorial here: http://moi3d.com/forum/index.php?webtag=MOI&msg=975.1 - there are 3 times in that tutorial where I create construction lines in order to snap on to these axis lines.

With the new axis snap there isn't any need to create any construction lines for building that shape, the snap points are just immediately available when you move to that area.

Here are some simple example shapes where Axis snap is useful.

Profiles in the front view for creating a revolve:







Profile in the Top view for mirroring and extruding into a base shape for a mouse:




It should also make it easier to grab points for some operations that commonly use an axis line like mirror or revolve - instead of going to the origin point which may be congested with other objects, you can just find any open spot along an axis now.


> in 3D view it only works in x and y axis no z axis.

Yes, this is intentional because it is very unusual to need to snap to the z axis in the 3D view while drawing a profile curve. It just doesn't come up very often. I worry about adding too many snaps automatically because each one takes away some freedom of movement for more fine tuned placement. The z axis in the 3d view kind of cuts across a section of the x/y plane, so automatically snapping there would prevent you from picking certain points on the x/y plane. If you need to snap there you can always drag out a construction line to do it.


> So, I would definitely want an option to turn it off.

I've attached here a patch to the UI that you can install to get the option. Unzip the attached ObjectSnapMenu.zip, and copy the ObjectSnapMenu.htm file over top of the old version in the C:\Program Files\MoI beta Sep-4-2007\ui folder.

Now if you go to the menu that pops up over the "Object Snap" button on the bottom toolbar, there will be a new "Axis" entry near the top of the menu underneath Origin.


> I think it would be nice to include an option to delete the last line,

That's definitely a good idea. I will have to wait until after V1 to add this though (because it would effect the docs). In the meantime with that latest patch it is possible to write some script macros that target construction lines, so now you can set up this keyboard shortcut which will remove the last added construction line:

script:var gd = moi.geometryDatabase; var clines = gd.getObjects().getConstructionLines(); if ( clines.length > 0 ) gd.removeObject( clines.item(clines.length-1) );

- Michael

Hi Pilou,

> Sorry but on my computer it's not working ? Only the straight Snap!

Please check that you have the new DLL installed in c:\Program Files\MoI beta Sep-4-2007, it should have this date and file size:

10/11/2007 02:48 AM 3,124,224 moi_lib.dll

Also, did you set up the keyboard shortcut that I mentioned for turning it on and off? Did you ever push the key for it? If so then you may have turned it off, press the key again to turn it back on.

- Michael

Ok I have found the error ;)
I had taken the script as "enable" the snap !!!
So I go to the Moi.ini and write y :) ObjectSnapAxis=y
Now that works fine :)

And sure it's more easy to re press the key :)

< Also you can now pass moi.exe the name of a script file (enclosed in quotes if there are any spaces in the file name or path) and it will run that script on startup.
can you give an example? it's enigmatic for me :) What script and where put it?....

Hi Pilou,

> What script and where put it?....

A script that you write to do some automated actions, you put it wherever you want, you have to tell MoI where it is by supplying the full path when you pass it to MoI.exe

So for example if your script is in c:\Scripts\MyScript.js, you would call MoI.exe in this way (probably from a batch file):

"C:\Program Files\MoI beta Sep-4-2007\MoI.exe" c:\Scripts\MyScript.js

For more information, please see this thread:
http://moi3d.com/forum/index.php?webtag=MOI&msg=987.1

There I give an example of how to call MoI with a script to have it load several IGES files and save them out as OBJ files, all without ever actually showing the MoI window.

- Michael

I guess you are right if I was doing that kind of modeling. It is different when someone is modeling an object, especially one that was already designed. What I am doing is free form modeling, I don't even have any sketches in the background, only simple ideas. So far the tools that you provided has met my modeling needs. Everything else would be just a bonus to maybe make the work a bit easier. For example, Rhino has the ability to turn a curve into a pipe, where each end's radius can be resized. Same thing can be done in MoI, only it takes a few more steps and no live preview, but I am sure you will address things like this in future versions of MoI. I remember the first version of rhino.

thx : ok so that is for specialists :)

Hi, Michael,
Tried out the new patch and it works fine, especially the persistent construction lines, once I figured out how to activate the persistent behavior. One quirk I noticed though, is that in the middle of a command,
pressing a single letter key to activate a script doesn't work, because the keystroke gets intercepted and sent to the coordinate box at the bottom (which is what it's designed to do ), Modifier+key works fine. Maybe a filter on the input boxes to reject any kind of keystrokes other than numerals would work better?
I noticed this awhile ago, doing something else, but since it wasn't affecting what I was doing, it kind of slipped on by.
At any rate, thanks for the construction line work, it works well having them stay on screen :)

Paul

while playing with the axis snap i noticed what i percive to be a general snap problem; if you are drawing or making a construction line starting along the major x or y axis lines, you can not snap to any other grid point directly in the x or y direction??

Hi Paul, thanks for the feedback.

> Maybe a filter on the input boxes to reject any kind of keystrokes other than numerals would work better?

There is actually a filter in place already. But there are a few keys other than numbers that are valid to type into that point coordinate box: R, @, < , W .

R and @ are used for relative point entry, < for entering an angle constraint, and W for world polar coordinates.

Did you happen to be using one of those keys? Other keys should work, for instance here I set up "K" for keeping construction lines and I don't have any problem triggering it while inside the line command for example.

- Michael

Yep, that was it :) I assigned the shortcut key to W. (Slaps self in head, looks around sheepishly...)

Paul

Hi xrok1 - yes good call that one is going to be a problem.

Object snaps have priority and if one of them is activated then grid snap will not kick in.

At the moment you can work around it by disabling Object Snap temporarily which will then let the grid snaps come through.

But this definitely needs to be fixed.

I think what makes sense is if there is an "on" snap (axis is kind of a variety of "on"), and the object snapped on to is a line running coincident with a grid line, I'll take a look and see if there is a grid intersection close by and redirect to that.

Other than that issue, what do you think of the new axis snap - worthwhile or does it get in the way?

I wouldn't normally be messing with a major new feature like this right before release, but it just seems like this can replace a lot of basic construction line creation, which is especially good for beginners since they don't even know about construction lines.

Thanks for your attention to the details here!

- Michael

Hi Paul - well the W is a pretty obscure thing - it's just for polar coordinates centered at the origin instead of from the previous point, like w5<24 .

I was just thinking that I could pretty easily remove the auto-focusing for W because that world polar coordinate entry is just not going to be used very often, and it would still work if you clicked on that control first.

However in V2 when there is an option to relocate the construction plane to some other location, it will probably work well to use regular points to be in that relocated coordinate system, and have w as a prefix for entering world coordinates.

So I guess I will leave it so it can be leveraged in the future.

- Michael

thumbs up! i like it. Another small attention to detail that sets your software apart, and shows that you are a user of this software, not just a developer trying to push a product.

I knew about the R and < , the W just kind of slipped by me--
Just ignore me when I start babbling !

Paul

I've put up a new patch here: (EDIT: Oct/21/2008 removed old broken link - this was an old patch for a v1 beta, it has already been incorporated into the v1 release and all v2 betas).

To install it unzip it and copy the moi_lib.dll file over top of the old version in C:\Program Files\MoI beta Sep-4-2007\ .

You can now hold down Alt when clicking to temporarily turn off snapping.

Fixed the new axis snap so it co-exists with grid snap instead of overriding grid snap.

Fixed some bugs and improved triangulation to help generate fewer skinny triangles, when exporting using "Quads & Triangles" or "Triangles only" settings.

- Michael

Works fine :)

WOW! Awesome! :)

thanks!