Specified Ragdoll bone / Jiggle Bone

SamNainocard · 11-02-2015 06:12 AM

I have a character with Tai (or perhaps hair or cloth) l but I don't want to animate the tail every animation, so I want to make those bone to be ragdoll and move on their own when character is animated.

But I can't figured how to make specified bone to be ragdoll while others are not.

Zervox · 11-02-2015 07:00 AM

if the tail is a separate mesh it could probably be connected like an attachment, it would either use its own physics controller or the part could maybe be controlled through physics joints?

SamNainocard · 11-02-2015 08:22 AM

So, separate tail from the mesh, then create tail mesh and actor in game with ragdoll enabled, and attached to bone point, right?
But it's look like a lot of work, is there another way?

Never used joint though.

Zervox · 11-02-2015 10:13 AM

There is always other ways, sadly I do not know enough about this specific field. smile

I just figured I'd mention the methods that popped into my head first, haven't played with physics actors or ragdolls that much. but I'd bet there is someone else on this forum who has(hopefully they might read this and comment on it).

SamNainocard · 11-03-2015 05:00 AM

I made a manual adjustment based on sac.body, it's may not good but I'm satisfied with the results, it doesn't affected by velocity though.

Code:

Mems<Vec2>     tails_angle;

flt            tails_y;

tails_angle[0].x+=AngleDelta(tails_angle[0].x, Angle(skel.bones[sac.body].matrix().z.xz())+PI_2);

tails_angle[0].x-=(1-anim.left_right*2)*anim.straight_strafe*anim.stop_move;

tails_angle[0].y+=AngleDelta(tails_angle[0].y, (tails_y-pos().y));

tails_y          =pos().y;

FREP(10)

{

   int bone_inx=skel.findBoneI(BONE_TAIL, 0, i);

   if(bone_inx>=0)

   {

      Int body_sign      =Sign(skel.skeleton()->bones[sac.body].perp.z);

      Flt tail_pitch     =tails_angle[i].y*body_sign;

          tail_pitch    *=1-anim.fly_full_body*anim.fly;

      Flt tail_pitch_part=tail_pitch/(i+1)+anim.fly;

      Flt tail_roll      =(tails_angle[Max(i-1, 0)].x-tails_angle[i].x);

      if(i>0) tail_roll+=(1-anim.stop_move)*Sin(Time.time())/(4*(i+1));  // tails move on their own naturally

      Clamp(tail_roll      , -PI/5 , PI/5);

      Clamp(tail_pitch_part, -PI/12, PI/8);

      Vec     v;

      Matrix3 m;

      v=skel.root.orn.cross(); if(!v.any())v.x=1; CHS(v.z);

      m.setRotate(v, tail_pitch_part*-body_sign).rotateY(tail_roll);

      skel.bones[bone_inx].orn*=m;

      AdjustValTime(tails_angle[i].x, tails_angle[Max(i-1, 0)].x, 0.0025  /(i+1+anim.stop_move*20000+Max(anim.b_turn_l, anim.b_turn_r)*500));

      AdjustValTime(tails_angle[i].y, tails_angle[Max(i-1, 0)].y, 0.000005/(i+1));

   }else break;

}

Specified Ragdoll bone / Jiggle Bone
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