Forum: Poser - OFFICIAL


Subject: Collision Detction with Poser5 hair

Zenman53186 opened this issue on Oct 20, 2002 ยท 6 posts


Zenman53186 posted Sun, 20 October 2002 at 5:06 PM

My apologies if this is a known issue; I went back a few days and didn't see any references.

I am trying to do a short animation with the Poser 5 Neftis Long Wavy hair prop (specificaly the "back_long" object). I can't get collision detection to work. I've set the hair object's collision property to 1, set collision detection for the program, set Collision Detection for the Dynamics Calculation. Any more collision detection buttons or properties that need to be set?

When I hit the Calculate Dynamics button, the hair falls down perfectly straight through the body.

I did see a message that someone else is having Dynamics Calculations with this hair prop, but he didn't specify if it was collision related.

Any ideas on what I'm doing wrong?


Velen posted Sun, 20 October 2002 at 5:12 PM

click colide against and put in the objects you want to colide with ope this helps Vel


Zenman53186 posted Sun, 20 October 2002 at 5:46 PM

Thanks, I suspect that's what I was missing; you have to set the "Collision" flag of every group that is involved in collision detection (as well as set all those other flags). Let me get back to trying this and see if I can get it.


farang posted Sun, 20 October 2002 at 9:28 PM

For me the back/long part goes completely batsh#t. Let us know how you progresss. I think one of the problems I have is that the dynamics are calculated while the figure is walking. Still, I'm at a loss as to what to adjust.


Zenman53186 posted Mon, 21 October 2002 at 12:15 PM

No, I can't get Collision Detection to work satisfactorily. I get the same result as you. I've tried tweaking dials; different result, same look. Longer hair with no kinks seems to work better, but the collision distance seems large in some cases (hair floats an inch or so above skin). The dynamics seem to work well as long as you don't use collision; it's when collision is thrown in that things get freaky. Probably the way it's calculated, seems to be from the root down. Hair "piles up" on the shoulders when it should flow down to the front or back. I've had some experience with the "Shave&aHaircut" package, and the use of IK chains in the hair, and the look is much more natural.


volfin posted Mon, 21 October 2002 at 6:42 PM

There was a thread a ways back about this, There is a bug (yes a real actual bug) in the hair collision routines. The hairs actually keep colliding against each other and jumping all over the place. I certainly hope this is on CL's list of things to fix.