Good Morning Michael, (Well it is here in wet and windy Hertfordshire)

This has been a very useful learning session - particularly the "Rebuild" command.

I am now an official fan of both MOI an BurrMan !

John

Burr:

When is your training book with video DVD for MOI coming out :-P.

Cool video Burr! believe it or not I didn't know you could pick a whole open ended joined surface and just hit 'planar' to instantly cap the ends and turn into to a solid, I used to pick the edges, cap the ends, then join, who knew! We learn something new every day :)

Thanks!
~Danny~

BTW you could try a tiny fillet on that trailing edge before the union and main fillet that should get rid of that fillet abnormality.

"... I didn't know you could pick a whole open ended joined surface and just hit 'planar' to instantly cap the ends and turn into to a solid, I used to pick the edges, cap the ends, then join"

Me too. Guess I better read the manual :)

Ed

Burr makes a darn good tutorial - Good work Burr!

Cool video Burr!

It's always interesting to see how others work.
I also learned about the planar capping feature and that you can crank up the blend value past the slider max.

Marc

Thanks guy's!!!!


Frenchy: """"""""""What is the code for put the Youtube video inside the forum?""""""""""

It's the embed button, but you have to go just below that and put a check mark in "use old embed code", then copy and paste.. The forum will strip out everything but the embed part...

So it looks like this part of a flash embed tag:

embed src="http://www.youtube.com/v/Yp1NXKwyf6I?version=3&hl=en_US&rel=0" type="application/x-shockwave-flash" width="560" height="345" allowscriptaccess="always" allowfullscreen="true"></embed

(i removed the begining and ending brackets so it shows in the forum)

@Burr many thx!
A little test :=) Works like a charm!
Not from me just taken by hasard! Seems not a plane's engine even there is a propeller :)

Your welcome Frenchy! That looks like the Complex engine model used in a viewport comparison, where MoI's viewport "blew doors" on the 10-20 K opponents!!! :o

Hi Danny,

"""""""""""""BTW you could try a tiny fillet on that trailing edge before the union and main fillet that should get rid of that fillet abnormality."""""""

Yeah, I tried that.. It works with a smaller fillet, but trying to do that huge "2 inch" fillet still produces that buggard up trailing edge...

I think a Variable fillet command will allow it to get the results desired. Like Michael mention, I think the desired result would be to have the fillet "ignore" that corner patch and just meet itself..

Here is a screenshot of a variable fillet in ViaCAD using a "by position option":



This is one in my CAM package that has a notoriously weak fillet engine (It's more of a CAM package, with Simple "solid modeling" adding in:



If I add any value other than "0" in this one, the corner patch buggers up also...

Punchcad produced a nice result!

Funny, Michael always states that MoI can be a nice "companion" to Rhino.. I have been considering buying Rhino to be a Companion to MoI!!! (Never really get it's interface or methods, but the plethera of advanced commands can be accessed for single shot methods, while we wait for MoI to get some of these...

I've been hemming and hawing on my companion to choose, so havnt done it yet... I have been looking at a couple, but just havnt taken the plunge yet.

I also wanted to follow up, because I couldnt let it go.... I made the fillet work in MoI with Danny's suggestion. I had originally filleted the trailing edge, but that puts seams at very small intervals that still messed with the filleter... Here I show getting a good wing root fillet out of MoI by creating a single, contiguous surface for the trailing edge.



Thanks Da.nny

Thanks for showing this clever setup. :-)

Peace,
Rich_Art. ;)

"I have been considering buying Rhino to be a Companion to MoI!!!"
You hit on a sentiment that had come to me through frustration the previous day: I had to do, what I thought, simple vector tracing of some art work. I usually go to "Inkscape" for line work, as AI has very uncomfortable line tools and process - this is what ensued:

" Lets start with a throught-point curve" - oh yeh, don't have it.
"Control-point curve", nope.
"Dammit I have to muk-around with those damn handles again!".
"Now where is the 3 point arc and circle?", ???, "intersect/fillet/blend/rebuild, ???!!!, inferred snapping and dynamic guides, ?!!!!!!."
"Dammit this interface is making my eyes bleed!"
"Note to self: if you do line work go directly to MOI - any type of complex technical drawing(that requires 3d-line-views, go to MOI) - if you want to relax, MOI -- Use AI as its companion".

Warning: feature requests ahead :)
There is one nice feature I miss(from Inkscape), creation handles persist past the point of creation(eg. 3 point circles have the 3 points left adjustable). And line intersection and trimming could be streamlined by allowing the 'brushing' away of intermediate line segments. But relatively speaking, MOI is heaven.

Hi Ambimind - it's still amazing to me that so many 2D illustration programs have stuck with the Bezier handle method instead of NURBS. The Bezier handle method tends to have that odd behavior of bulging out previous sections of the curve.

> There is one nice feature I miss(from Inkscape),
> creation handles persist past the point of creation(eg. 3
> point circles have the 3 points left adjustable).

Probably in MoI this will come as some kind of history related function eventually.


> And line intersection and trimming could be streamlined
> by allowing the 'brushing' away of intermediate line segments.

The tricky part about this is that MoI also has to deal with surfaces as well and not just curves alone - that can sometimes add some constraints for how a particular command is set up to operate. Also the current Trim workflow allows for just splitting objects up into pieces instead of necessarily eliminating any parts - that's a pretty important function to have as well.

So that's why that kind of trim may end up being some kind of additional QuickTrim command in the future, see here for some other discussion on it:
http://moi3d.com/forum/index.php?webtag=MOI&msg=4129.3

- Michael

Another cool demonstration video Burr, I like stirring up thought in people :)

Kudos to you too :)

-

So Trim and Blend are your best friends :)

Ps When you say "pretty close" this can be used in plane industry for make piece of wings? (what is precision needing? )
Or just sufficient for make very nice Scale models ? (for image or handcraft building or 3D Print)

Hi Frenchy,
When I say "pretty close" I am speaking about "matching the curve that already exists"... from the original model.. The last video was just showing a method to have the fillet work in this particular case. (no need to watch me sit there for 5 minutes trying to "match his curve")

If you were building a "precise airfoil", you would probably incorporate the conic tool with blend.

These old models are being made by "guys tracing bitmaps", so no such thing as precision or exact.. I think the true design would have "precise plotting" of everything.. Not just sketching.

thx for "precisions" ;)

I just tried Inventor Fusion on this. (It can read 3dm files direct by the way). After doing a boolean join, the filleter got it right first time. Here is a screen shot:

Nice.. Inventor fusion looks like Autodesk 123D...

Peace,
Rich_Art. ;)