Forum: Virtual World Dynamics


Subject: Inflate? Love it !!!

erik-nl opened this issue on Jun 29, 2017 · 26 posts


erik-nl posted Thu, 29 June 2017 at 2:34 PM

I attempted draping OptiTex's Century Nightgown in VWD before, and was a bit disappointed by how little volume it ended up with. So now I tried a different approach to get to this result:

OptiTex_Century_Nightgown_G2F_VWD_02.jpg

And that approach was to first inflate that dress (on a T-posed figure) like a balloon to get all the garbage folds out, (see the OptiTex exported version in the back right hand side)

and then, as step two, use the blown up version as a starting point for an animated drape into the desired pose, (still with a bit of inflation going on to keep the volume up).

Then, as a third step, I did a static drape with the posed figure to let the air out of the dress, so to speak, so the fabric slowly dropped into a natural position.

OptiTex_Century_Nightgown_G2F_VWD_02_MO.jpg

More than happy with the result!

Cheers!

Erik


VirtualWorldDynamics posted Thu, 29 June 2017 at 6:36 PM

Hello Erik,

Great tests made with the "Inflate" function.

This function can be used with positive or negative values. You can get the inverse action to create vacuum or to plate a cloth on the character.

Have a great day.

 Gérald

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Smaker1 posted Fri, 30 June 2017 at 2:13 AM

@Erik : you amaze me! Thanks for all these ideas!

@Gérald: didn't thought about negative values: new idea for a project!

So many ideas, so little time!


erik-nl posted Fri, 30 June 2017 at 4:13 AM

Thanks guys : )

There's so much more to try, so little time indeed!


itou31 posted Fri, 30 June 2017 at 6:52 AM

Thanks erik, very informative !


Ashfire45 posted Fri, 30 June 2017 at 9:24 AM

You're a legend, Erik! Your usage of VWD is so professional. :)


VirtualWorldDynamics posted Fri, 30 June 2017 at 1:39 PM

Hello, Ashfire45, I fully agree with you.

Erik, All your images are so beautiful. For me, it is a real pleasure to see your works.

A great weekend to everyone.

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erik-nl posted Sat, 01 July 2017 at 5:32 AM

Ha! a legend, c'mon guys, I'm not dead yet!

Oh, I cannot thank you enough, Gérald, for creating the dynamic draping tool I have been wishing for for YEARS!

By the way, I'm thinking of trying VWD on shoes and boots. Those have always been troublesome when fitting them to figures they weren't created for, and maybe VWD can help solve those problems too, who knows?

The 'nail to collision' and especially the selective rigidity settings just could be perfect for footwear, but I haven't yet seen anybody use VWD for them yet.

Have a wonderful weekend, Cheers!

Erik


Smaker1 posted Sun, 02 July 2017 at 4:25 AM

Hello

Thanks to Erik and Gérald about inflate, here is my little "summer project" 😄 !

How could we live without VWD ? It completely changed the T-Shirt drapé for the best.

Wet-LR.jpg


erik-nl posted Sun, 02 July 2017 at 4:28 AM

Looks great Smaker!


Smaker1 posted Sun, 02 July 2017 at 4:51 AM

Thanks Erik, your approach about inflate opens a world of new possibilities. Keep going on new ideas 😃 !


ebergerly posted Sun, 02 July 2017 at 5:17 AM

And conversely, don't forget my absolute favorite feature of VWD:

SCALE !!!

If you want clothing to fit naturally and form-fitting, this is the most wonderful feature. Just select the vertices of the clothing and set the Scale to maybe 80-90%. Amazing.

No more of that conforming clothing nonsense where clothing doesn't naturally bridge the area between the legs or the breasts :)


ebergerly posted Sun, 02 July 2017 at 9:37 AM

Also, don't forget the force field you can place under the clothing to expand it. And it even works dynamically. You can move it in real time and the sim will keep calculating as you move the force field. That's what I do to place or remove folds, etc.


VirtualWorldDynamics posted Sun, 02 July 2017 at 6:02 PM

Hello,

The force field can also be used with positive or negative values.

I just added a new function using the same interface as the Scale feature. This function uses a percentage value, an horizontal and/or a vertical direction, to modify the softness of the springs. This allows to change the behaviour of a cloth vertically or horizontally. Very useful in some cases.

Have a good week.

 Gérald

____________________________________________

Follow me on Twitter : @VWDynamics

Watch demo videos on Youtube


erik-nl posted Mon, 03 July 2017 at 5:40 AM

VirtualWorldDynamics posted at 12:32PM Mon, 03 July 2017 - #4309038

I just added a new function using the same interface as the Scale feature. This function uses a percentage value, an horizontal and/or a vertical direction, to modify the softness of the springs. This allows to change the behaviour of a cloth vertically or horizontally. Very useful in some cases.

That's great news Gérald!

I have some questions about that functionality, but I will post them in another thread to make it easier for you to find ; )

Cheers!

Erik


Writers_Block posted Mon, 03 July 2017 at 2:09 PM

what would be great, is if the force field could be animated? Say attached to a Null that was appropriately named in Daz (or Poser?); so VWD knows it needs it, and the Bridge too.


VirtualWorldDynamics posted Mon, 03 July 2017 at 3:31 PM

Hello Writer_Block,

Excuse me, I am not sure to understand your wish. Could you give me some precisions on how to implement this.

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erik-nl posted Mon, 03 July 2017 at 4:53 PM

If I am correctly understanding W_B, I think that's a great idea!

A way to explain it (as I understand it) would be to use a dummy object (a null object, a cube primitive or something else) in DAZ Studio, as an animated placeholder for a moving origin of a force field in VWD during an animated simulation.

This way a user could guide and control the way the force field moves during that animation cycle to obtain a desired (end)effect. You could even think about giving that placeholder an attribute that tells VWD how strong the force field must be at any time during the animation. So changing the size of the cube, or its colour, or the number of vertices during the animation could be a measure of power for the force field in VWD.

Giving that placeholder object a pre-determined name would then tell VWD that it is a 'special' object, so it can be separated from collision- and cloth objects.

All sounds doable enough to me : )

Cheers!

Erik


Writers_Block posted Mon, 03 July 2017 at 5:53 PM

Erik explained it very well. :)

Perhaps a checkbox in VWD could be used to flag if the 'animated-force' field present should actually be used or not.


Smaker1 posted Tue, 04 July 2017 at 1:46 AM

Hello

for basic user like me, can you give me some exemple where force field is the good answer ?


erik-nl posted Tue, 04 July 2017 at 4:14 AM

The way I see it, it's a way to 'push things around', similar to 'Wind'.

But wind is pushing in one uniform direction all over the place, whereas a force field radiates in all directions from a single point in 3D space.

With wind you can only change the general direction it is coming from, and of course its strength. By moving the position of the origin of a force field you can do much more than just that.

Animating the direction the 'wind' is blowing from (and its force) could be helpful as well in nudging stuff into a particular direction.

Cheers!

Erik


Smaker1 posted Tue, 04 July 2017 at 6:41 AM

Thanks Erik!


VirtualWorldDynamics posted Tue, 04 July 2017 at 11:23 AM

Hello Stef,

I don't know why the Hinata dress tutorial has not been seen by many people.

This tutorial is in fact 3 tutorials using 3 different methods.

The method 3 is, for me, the best choice. This method shows the use of the force field. Here is the link : https://www.youtube.com/watch?v=aN_YzfAHUfY

It is important to understand the preliminary work necessary to modify the shape of the dress is to be made only once. This shape must be recorded and can be used for all the simulations using this dress.

I hope this tutorial will help you to understand the use of the "Force Field".

Have a great day.

 Gérald

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Follow me on Twitter : @VWDynamics

Watch demo videos on Youtube


Smaker1 posted Tue, 04 July 2017 at 2:50 PM

Hello Gerald

my bad ! I missed the last videos. I must study them in detail ! Thanks


VirtualWorldDynamics posted Wed, 05 July 2017 at 2:39 PM

Hello,

Yes, all is doable. I can animate the force field or create a specific gizmo for the oriented Scale or Softness. I will create a "todo" list in the program folder to keep in memory the functions I will have to write in the future.

For now, I want to stay concentrated on the GPU programming. This asks me to learn a lot.

Sorry for this extra delay.

Have a great day.

  Gérald

____________________________________________

Follow me on Twitter : @VWDynamics

Watch demo videos on Youtube


Writers_Block posted Thu, 06 July 2017 at 2:17 PM

GPU support would rock, so can completely understand that.