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Poser - OFFICIAL F.A.Q (Last Updated: 2024 Nov 26 1:43 pm)



Subject: Collision: is this what we wanted?


volfin ( ) posted Fri, 04 October 2002 at 10:04 PM · edited Wed, 27 November 2024 at 1:49 AM

file_26187.jpg

Ok, collision between figures was non existent in P5 before the patch. Collision was one of the listed bug fixes. I decided to test it out again. Here we see two figures intersecting each other as I moved them with the move tool. They both have collision check on and collision is set to on in the control to the right of the document window. A few seconds later...


volfin ( ) posted Fri, 04 October 2002 at 10:05 PM

file_26188.jpg

and ta-da, they re-align themselves to eliminate collision! This is great. But lets take it a step further.


volfin ( ) posted Fri, 04 October 2002 at 10:07 PM

file_26189.jpg

What if the two figures are arranged in a more complicated fashion. Like the classic boot-poking through the pants scenario. Lets turn on Collision detection and show intersections...


volfin ( ) posted Fri, 04 October 2002 at 10:08 PM

file_26190.jpg

Cool.. Poser detects the collision areas. This is much more than it did before the patch. What will it do when we turn collsion detection on? lets see... Hmm, about 3 minutes later...


volfin ( ) posted Fri, 04 October 2002 at 10:10 PM

file_26191.jpg

Wha?? Why, it did nothing. oh wait, I bet I know... Clothifying is the answer... so lets turn the pant leg into some nice strechable cloth. then I bet the pokethrough will be eliminated...


volfin ( ) posted Fri, 04 October 2002 at 10:16 PM

file_26192.jpg

Or maybe not... Oh yeah, I seem to remember somthing about all pokethrough must be eliminated before you clothify. Hmm, then what's the point of the collision again? If you don't see my point yet, here it is. Collision was supposed to be the answer to the annoyance of having to morph, tweak, or hide parts of figures to eliminate poke-through. But for *this specific* purpose it is useless. I has it's place. But manual pokethrough tweaking is still a big necessity. Perhaps I just had my expectations too high. I envisioned Collision as the feature that would automatically bend,morph, or fold the figures to avoid one mesh intersecting another. I think it has the potential to do so, if programmed cleverly enough. Just an observation.


nakamuram ( ) posted Fri, 04 October 2002 at 11:45 PM

I have the same "poke through" problem when I use collisions. You would think that they could implement some sort of "covers" function and eliminate morphing and conforming entirely. The only morph would be how tight or loose. For example, point at a bra and indicate that it covers the chest and collars "tightly," or point at a skirt and say that it covers the hips and buttocks "loosely". Oh well, maybe in Poser 6!!!


notefinger ( ) posted Sat, 05 October 2002 at 3:11 AM

Poser 6? Another 2 years?


Cage ( ) posted Sat, 05 October 2002 at 3:12 AM

Hmm. If there isn't a built in feature to move the colliding vertices, I wonder whether a Python script could be written to do the job? There's a Python script which "inflates" an object or figure. If the collision detection can be accessed via Python, maybe something similar to the "inflato" function could somehow be used to displace the colliding vertices? Hmm. Dang, I wish I could program.... Hmm.

===========================sigline======================================================

Cage can be an opinionated jerk who posts without thinking.  He apologizes for this.  He's honestly not trying to be a turkeyhead.

Cage had some freebies, compatible with Poser 11 and below.  His Python scripts were saved at archive.org, along with the rest of the Morphography site, where they were hosted.


c1rcle ( ) posted Sat, 05 October 2002 at 3:36 AM

hmmm how about trying this... take the shin of the trousers and shrink the x&y scale to about 50% on frame one before you clothify, then once it's calculating the cloth settings with collision switched on it should increase the size gradually back to 100% & hopefully by the time it gets to frame 30 it's sure to have worked out the collisions & fixed them.


c1rcle ( ) posted Sat, 05 October 2002 at 3:37 AM

oops should be X&Z scales not X&Y


isaacnewton ( ) posted Sat, 05 October 2002 at 8:06 AM

A "shrink wrap" function would be enormously useful. The ability to have a piece of clothing form fit itself to a figure using collision detection is such an obvious idea, I'm amazed that it isn't already present.

Maybe CL will put it into the next update. How about it CL?


c1rcle ( ) posted Sat, 05 October 2002 at 8:12 AM

it's already here, make the clothing slightly bigger than normal at frame 1 then shrink it while it calculates the settings and it will shrink wrap.


isaacnewton ( ) posted Sat, 05 October 2002 at 8:20 AM

That sounds interesting, c1rcle. But I'm not sure I understand what you mean by "shrink it while it calculates the settings" Is this some kind of trick that fools the program into doing something that was not originally intended, or is this a feature? Would you mind giving a bit more detai? Maybe a screen shot? Thanks, Isaac


c1rcle ( ) posted Sat, 05 October 2002 at 8:27 AM

yep, I'm working on it right now, what I've done is put the Judy Strappy dress on Mike, I've made the scales for the dress bigger than normal x=134% y=120% z=152% this is at frame 1 of the animation, then at frame 30 I put the scales back to 100% then go to the cloth room & clothify & set collisions up for the whole of mike, if I've got the right settings it should stretch the dress round him. I'll post a pic to another thread once I've got it done.


isaacnewton ( ) posted Sat, 05 October 2002 at 8:41 AM

This sounds really cool. If this works then it will be a big feather in CL's cap in my eyes!


c1rcle ( ) posted Sat, 05 October 2002 at 8:47 AM

well it work for mike the dresses seem to want to keep their shape & mike doesn't have the chest for those dresses, so I'll try with vicky & morphed out boobs instead


JOE LE GECKO ( ) posted Sat, 05 October 2002 at 9:42 AM

file_26193.jpg

Collision Dectection in the Pose window is here to help you pose everything in your scene in an easier way ( think it's a great feature foranimators ). Imagine you want your figure to climb up some stairs : select the feet-toes and your satirs prop, turn collision detection on them and in the scene ( just below Disply Shdow button for those who don't know where it is :) and when one of the object collide with another, you can go further. Look at the image : Vic2lo foot on a prop perfectly lying on the top ! Done in about 10 seconds. I haven't tested it, but I'm sure it will work great to pose a hand holding a gun. It's usually a real nightmare to be sure fingers are ok. I personnaly think it's one of the greatest features with menus, dynamic clothing ( one of the quickest I've seen ) and raytracing ( love the SR1 transmapped hair :)


JOE LE GECKO ( ) posted Sat, 05 October 2002 at 9:43 AM

Sorry for mispelling : should read twice before posting :)


volfin ( ) posted Sat, 05 October 2002 at 1:16 PM

I think you have hit on somthing c1rcle. I was hoping someone would come up with an idea. Isn't it great when a group puts their heads together on a problem? *8-) It's a few extra steps, but may be well worth it.


c1rcle ( ) posted Sat, 05 October 2002 at 1:26 PM

yeah shame it doesn't work quite like that, it seems you have to make the figure smaller then increase the size as the simulation goes along I think, I'm doing some more experimenting before I can say for sure


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