Caretaker First-Person Arms

const meta={name:'Caretaker First-Person Arms',description:'First-person arms derived from The Caretaker full body, sharing its olive workwear, articulated hands and 47-joint rig. Includes left-hand flashlight carry, axe and shotgun grips, and a camera-framed reload. The full body remains the canonical character representation.'};
const MODE='fps-arms';
const FINGER_LENGTHS=[[.032,.024,.017],[.034,.027,.018],[.032,.025,.017],[.027,.020,.014]];
const gripDatum=weapon=>weapon==='axe'?[.061,-.095,0]:weapon==='shotgun'?[.078,-.095,0]:weapon==='flashlight'?[.061,-.095,0]:[.090,-.095,0];
function graspFrame(side,weapon){const axis=(x,y,z,a)=>new THREE.Quaternion().setFromAxisAngle(new THREE.Vector3(x,y,z),a*Math.PI/180);return weapon==='flashlight'?axis(1,0,0,270).multiply(axis(0,1,0,side*90)):weapon==='reload'?axis(1,0,0,-40).multiply(axis(0,1,0,-90)):weapon==='shotgun'?axis(0,0,1,25).multiply(axis(0,1,0,side*90)):weapon==='axe'?axis(0,1,0,20).multiply(axis(0,1,0,side*90)).multiply(axis(1,0,0,-side*90)):axis(1,0,0,side*(weapon==='reload'?(MODE==='fps-arms'?20:40):45)).multiply(axis(0,1,0,side*90));}
// Three-dimensional tangent wrapping around the actual tool section; bone rest axes remain explicit.
const 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],[-0.0113638,0.0230534],[-0.0076964,0.0215717],[0.0225804,-0.0038336],[0.0204844,-0.0004792],[0.0246765,-0.007188],[0.0244006,-0.0111338],[0.0241247,-0.0150796],[0.0215822,-0.0181096],[0.0190397,-0.0211396],[0.0152018,-0.0220965],[0.0113638,-0.0230534],[0.0076964,-0.0215717],[0.004029,-0.02009],[0.001933,-0.0167356],[-0.0001631,-0.0133812],[0.0001128,-0.0094354],[0.0003888,-0.0054896],[0.0029313,-0.0024596],[0.0054737,0.0005704],[0.0093117,0.0015273],[0.0131496,0.0024842],[0.016817,0.0010025]],"marker":[0.1265,0.085,0],"frame":[-0.24184476264797528,-0.6644630243886747,0.24184476264797522,0.6644630243886748]}};
function triggerIndexRotations(fire=false){
 const rotation=graspFrame(1,'shotgun').invert().multiply(new THREE.Quaternion().setFromAxisAngle(new THREE.Vector3(0,0,1),-5.710593*Math.PI/180)),center=new THREE.Vector3(...gripDatum('shotgun')),marker=new THREE.Vector3(-.060,.046,0),toHand=p=>new THREE.Vector3(...p).sub(marker).applyQuaternion(rotation).add(center),root=new THREE.Vector3(.034,-.106,.043),lengths=FINGER_LENGTHS[0],tip=toHand(fire?[.022,.017,.0095]:[.040,.034,.046]),distal=new THREE.Vector3(...(fire?[1,-.25,-.85]:[1,-.05,-.10])).normalize().applyQuaternion(rotation),p2=tip.clone().addScaledVector(distal,-lengths[2]),towards=p2.clone().sub(root),distance=towards.length();
 if(distance>lengths[0]+lengths[1])throw Error('Trigger index target exceeds digit reach');towards.normalize();const cos=(lengths[0]**2+distance**2-lengths[1]**2)/(2*lengths[0]*distance),pole=new THREE.Vector3(0,0,1).applyQuaternion(rotation);pole.addScaledVector(towards,-pole.dot(towards)).normalize();const p1=root.clone().addScaledVector(towards,lengths[0]*cos).addScaledVector(pole,lengths[0]*Math.sqrt(Math.max(0,1-cos*cos))),points=[root,p1,p2,tip],result={};let previous=new THREE.Quaternion();for(let i=0;i<3;i++){const absolute=new THREE.Quaternion().setFromUnitVectors(new THREE.Vector3(0,-1,0),points[i+1].clone().sub(points[i]).normalize());result['finger_right_0_'+['a','b','c'][i]]=previous.clone().invert().multiply(absolute);previous=absolute;}return result;
}
function stockThumbRotations(){const rotation=graspFrame(1,'shotgun').invert().multiply(new THREE.Quaternion().setFromAxisAngle(new THREE.Vector3(0,0,1),-5.710593*Math.PI/180)),center=new THREE.Vector3(...gripDatum('shotgun')),marker=new THREE.Vector3(-.060,.046,0),toHand=p=>new THREE.Vector3(...p).sub(marker).applyQuaternion(rotation).add(center),base=new THREE.Vector3(.027,-.076,.040),rest=[new THREE.Vector3(0,-.020,-.010),new THREE.Vector3(0,-.025,0),new THREE.Vector3(0,-.018,0)],lengths=rest.map(v=>v.length()),tip=toHand([.020,.087,.028]),axis=new THREE.Vector3(1,-.10,-.50).normalize().applyQuaternion(rotation),p2=tip.clone().addScaledVector(axis,-lengths[2]),towards=p2.clone().sub(base),distance=towards.length();if(distance>lengths[0]+lengths[1])throw Error('Thumb resting target exceeds reach');towards.normalize();const cos=(lengths[0]**2+distance**2-lengths[1]**2)/(2*lengths[0]*distance),pole=new THREE.Vector3(0,0,1).applyQuaternion(rotation);pole.addScaledVector(towards,-pole.dot(towards)).normalize();const p1=base.clone().addScaledVector(towards,lengths[0]*cos).addScaledVector(pole,lengths[0]*Math.sqrt(Math.max(0,1-cos*cos))),points=[base,p1,p2,tip],result={};let previous=new THREE.Quaternion();for(let i=0;i<3;i++){const absolute=new THREE.Quaternion().setFromUnitVectors(rest[i].clone().normalize(),points[i+1].clone().sub(points[i]).normalize());result['thumb_right_'+['a','b','c'][i]]=previous.clone().invert().multiply(absolute);previous=absolute;}return result;}
function graspRotations(side,weapon,kind='hold'){
 const result={},suffix=side<0?'left':'right',center=new THREE.Vector3(...gripDatum(weapon)),shell=weapon==='reload'&&kind==='shell',profile=weapon==='reload'?HANDLE_CONTACT_PROFILES['reload'+(shell?'Shell':'')+(MODE==='fps-arms'?'Fps':'Body')]:HANDLE_CONTACT_PROFILES[weapon];
 function tangent(p,profile,r,sign){const relative=p.clone().sub(center),evaluate=t=>{const n=new THREE.Vector2(Math.cos(t),Math.sin(t));let best=profile[0],h=-Infinity;for(const v of profile){const d=v[0]*n.x+v[1]*n.y;if(d>h){h=d;best=v;}}return {q:new THREE.Vector2(...best).addScaledVector(n,r+.0006),n};};let last=evaluate(0),f0=(relative.x-last.q.x)*last.n.x+(relative.y-last.q.y)*last.n.y;for(let i=1;i<=128;i++){let hi=i*Math.PI*2/128,lo=(i-1)*Math.PI*2/128,s=evaluate(hi),f=(relative.x-s.q.x)*s.n.x+(relative.y-s.q.y)*s.n.y;if(f*f0<=0){let fl=f0;for(let n=0;n<25;n++){const mid=(lo+hi)/2,m=evaluate(mid),fm=(relative.x-m.q.x)*m.n.x+(relative.y-m.q.y)*m.n.y;if(fl*fm<=0)hi=mid;else{lo=mid;fl=fm;}}s=evaluate((lo+hi)/2);const d=new THREE.Vector3(-sign*s.n.y,sign*s.n.x,0),toward=new THREE.Vector3(s.q.x-relative.x,s.q.y-relative.y,0);if(d.dot(toward)>0)return d;}f0=f;}throw Error('Digit section tangent unavailable '+weapon+' '+p.toArray());}
 function digit(role,start,offsets,radii,sign,profile,axialShift=0){let p=new THREE.Vector3(...start),previous=new THREE.Quaternion();for(let n=0;n<offsets.length;n++){const rest=new THREE.Vector3(...offsets[n]),r=radii[n];const d=tangent(p,profile,r,sign);if(axialShift)d.z=axialShift;d.normalize();const phalanxQ=new THREE.Quaternion().setFromUnitVectors(rest.clone().normalize(),d),local=previous.clone().invert().multiply(phalanxQ);result[role+'_'+['a','b','c'][n]]=local;p.addScaledVector(d,rest.length());previous=phalanxQ;}}
 for(let f=0;f<4;f++){const ls=FINGER_LENGTHS[f],z=(1.5-f)*side*.022;if(weapon==='shotgun'&&f===0)continue;if(shell&&f!==0){for(const [n,s]of ['a','b','c'].entries())result['finger_'+suffix+'_'+f+'_'+s]=new THREE.Quaternion().setFromAxisAngle(new THREE.Vector3(0,0,1),[45,20,20][n]*Math.PI/180);continue;}digit('finger_'+suffix+'_'+f,[.025,-.095,shell?0:z],ls.map(l=>[0,-l,0]),[.0095,.0085,.0075],1,shell?profile.outline:profile.fingers[f]);}
 if(weapon==='shotgun'){Object.assign(result,stockThumbRotations());return result;}digit('thumb_'+suffix,[weapon==='shotgun'?.027:.030,weapon==='shotgun'?-.076:-.065,shell?0:side*.040],[[0,-.020,-side*.010],[0,-.025,0],[0,-.018,0]],[.011,.009,.0075],-1,shell?profile.outline:profile.thumb,shell?0:-side*.12);
 return result;
}

const BODY_SPEC={"schemaVersion":3,"model":"pbrMetallicRoughness","name":"Caretaker olive workwear and weathered skin","roughness":0.96,"metalness":0,"emissiveIntensity":1,"alphaMode":"opaque","alphaCutoff":0.5,"doubleSided":false,"textures":{"baseColor":{"kind":"resource","resourceId":"kiln.library.b5db650c0b2c4afff7b590debb66dbc7bccd85ae7500e3e5a38a135dab24764b.base-color","sampler":{"minFilter":"nearest","magFilter":"nearest","wrapS":"clamp-to-edge","wrapT":"clamp-to-edge"}}}};
async function build(){
  const root=createRoot(MODE==='fps-arms'?'CaretakerFPS':'Caretaker');
  const material=await compilePortableMaterialSpecV3(BODY_SPEC),bones=[],byRole={},names={},fragments={BodySkin:[],HeadSkin:[],ArmsSkin:[]};
  function chain(name,segments,parent){const result=createBoneChain(name,segments,{parent});segments.forEach((s,i)=>{const bone=result.nodes[i];bones.push(bone);byRole[s.role]=bone;names[s.role]=bone.name;});return result;}
  const body=chain('Body',[{role:'pelvis',offset:[0,.94,0]},{role:'spine',offset:[.01,.18,0]},{role:'chest',offset:[.015,.2,0]},{role:'neck',offset:[.015,.12,0]},{role:'head',offset:[.015,.12,0]}],root);
  for(const side of [-1,1]){const suffix=side<0?'left':'right';chain('Arm_'+suffix,[{role:'shoulder_'+suffix,offset:MODE==='fps-arms'?[-.265,.16,side*.26]:[-.01,.08,side*.22]},{role:'elbow_'+suffix,offset:MODE==='fps-arms'?[.30,-.35,side*.14]:[.015,-.27,side*.05]},{role:'wrist_'+suffix,offset:MODE==='fps-arms'?[0,-.28,0]:[.015,-.24,side*.005]}],byRole.chest);chain('Leg_'+suffix,[{role:'hip_'+suffix,offset:[0,-.02,side*.105]},{role:'knee_'+suffix,offset:[.02,-.43,0]},{role:'ankle_'+suffix,offset:[-.015,-.37,0]}],byRole.pelvis);
    for(let finger=0;finger<4;finger++){const ls=FINGER_LENGTHS[finger];chain('Finger_'+suffix+'_'+finger,[{role:'finger_'+suffix+'_'+finger+'_a',offset:[.025,-.095,(1.5-finger)*side*.022]},{role:'finger_'+suffix+'_'+finger+'_b',offset:[0,-ls[0],0]},{role:'finger_'+suffix+'_'+finger+'_c',offset:[0,-ls[1],0]}],byRole['wrist_'+suffix]);}
    chain('Thumb_'+suffix,[{role:'thumb_'+suffix+'_a',offset:[.030,-.065,side*.040]},{role:'thumb_'+suffix+'_b',offset:[0,-.020,-side*.010]},{role:'thumb_'+suffix+'_c',offset:[0,-.025,0]}],byRole['wrist_'+suffix]);
  }
  root.updateMatrixWorld(true);const positions={};for(const role of Object.keys(byRole))positions[role]=byRole[role].getWorldPosition(new THREE.Vector3());
  const eye=positions.head.clone().add(new THREE.Vector3(.135,.05,0));if(MODE==='fps-arms'){root.position.set(0,-1.61,0);root.updateMatrixWorld(true);}
  function anchor(name,parent,position){const object=new THREE.Object3D();object.name=name;object.position.fromArray(position);object.userData.nightmanAnchor={version:1,role:name,forward:'+X',up:'+Y'};parent.add(object);return object;}
  anchor('camera_eye',MODE==='fps-arms'?root:byRole.head,MODE==='fps-arms'?[0,1.61,0]:[.135,.05,0]);anchor('chest_mount',byRole.chest,[.125,.035,0]);anchor('grip_left_flashlight',byRole.wrist_left,gripDatum('flashlight')).quaternion.copy(graspFrame(-1,'flashlight').invert());for(const suffix of ['left','right']){const side=suffix==='left'?-1:1;anchor('grip_'+suffix,byRole['wrist_'+suffix],gripDatum(side<0?'reload':'shotgun')).quaternion.copy(graspFrame(side,side<0?'reload':'shotgun').invert());anchor('grip_'+suffix+'_axe',byRole['wrist_'+suffix],gripDatum('axe')).quaternion.copy(graspFrame(side,'axe').invert());anchor('foot_contact_'+suffix,byRole['ankle_'+suffix],[.04,-.115,0]);}
  root.userData.nightman={version:1,mode:MODE,joints:names,eyeHeight:eye.y,eyePosition:eye.toArray(),bodyHeight:1.72,ownCameraHide:['Mesh_Head','Mesh_Cap','Mesh_CapBrim','Mesh_Nose','Mesh_EarLeft','Mesh_EarRight','Mesh_Beard','Mesh_Neck'],paletteMaterial:'nm-caretaker-clothing-skin',fpsOrigin:'fixed feet-relative eye; root camera_eye does not inherit head motion',derivedFromBodyProgram:'p_e468609d7cbc',cameraMountLocal:[0,1.61,0],contacts:'authored point witnesses; runtime solves grounded movement'};
  const index=role=>bones.indexOf(byRole[role]);
  function blend(roleA,roleB,t){return [[roleA,1-Math.max(0,Math.min(1,t))],[roleB,Math.max(0,Math.min(1,t))]];}
  function geometry(positions,uvs,indices){let g=new THREE.BufferGeometry();g.setAttribute('position',new THREE.Float32BufferAttribute(positions,3));g.setAttribute('uv',new THREE.Float32BufferAttribute(uvs,2));g.setIndex(indices);g=g.toNonIndexed();g.computeVertexNormals();return g;}
  function skin(name,g,region,weight){if(region==='hand'&&['Finger','Thumb','Hand'].some(prefix=>name.startsWith(prefix))){const uv=g.getAttribute('uv'),finger=name.startsWith('Finger'),thumb=name.startsWith('Thumb');for(let i=0;i<uv.count;i++)uv.setXY(i,uv.getX(i)*(finger?.42:thumb?.55:1)+(finger?.29:thumb?.225:0),uv.getY(i)*(finger?.42:thumb?.30:.67)+(finger?.2:thumb?.25:.15));}if(region==='beard'){const uv=g.getAttribute('uv');for(let i=0;i<uv.count;i++)uv.setY(i,1-uv.getY(i));}g=remapUVToAtlas(g,material.map,region,{inputOrigin:'top-left',mode:'texel-center'});if(g.index)g=g.toNonIndexed();const a=g.getAttribute('position'),indices=[],weights=[];for(let i=0;i<a.count;i++){const influences=weight(a.getX(i),a.getY(i),a.getZ(i));for(let lane=0;lane<4;lane++){const weight=influences[lane]?.[1]??0;indices.push(weight>0?index(influences[lane][0]):0);weights.push(weight);}}const bucket=['Head','Neck','Nose','EarLeft','EarRight','Cap','CapBrim','Beard'].includes(name)?'HeadSkin':/^(Sleeve|Hand|Finger|Thumb)/.test(name)?'ArmsSkin':'BodySkin';fragments[bucket].push({name,region,g,indices,weights});g.computeBoundingBox();const marker=new THREE.Object3D();marker.name='Mesh_'+name;marker.userData.nightmanPart={version:1,skinGroup:bucket,bounds:{min:g.boundingBox.min.toArray(),max:g.boundingBox.max.toArray()}};root.add(marker);return marker;}
  // Explicit profile rings and split normals control silhouette and skin deformation.
  function tube(rings,segments=8,start=-Math.PI,end=Math.PI,caps=true){const p=[],uv=[],ix=[],stride=segments+1;for(let j=0;j<rings.length;j++){const r=rings[j];for(let i=0;i<=segments;i++){const angle=start+(end-start)*i/segments;p.push(r.x+r.rx*Math.cos(angle),r.y+(r.ySlope??0)*Math.sin(angle)+(r.yWave??0)*Math.abs(Math.sin(angle)),r.z+r.rz*Math.sin(angle));uv.push(i/segments,j/(rings.length-1));}}for(let j=0;j<rings.length-1;j++)for(let i=0;i<segments;i++){const a=j*stride+i,b=a+stride;if(rings.at(-1).y>rings[0].y)ix.push(a,b,a+1,a+1,b,b+1);else ix.push(a,a+1,b,a+1,b+1,b);}if(caps&&end-start>6){for(const [j,reverse] of [[0,rings.at(-1).y<rings[0].y],[rings.length-1,rings.at(-1).y>rings[0].y]]){const r=rings[j],center=p.length/3;p.push(r.x,r.y,r.z);uv.push(.5,.5);for(let i=0;i<segments;i++){const a=j*stride+i;ix.push(center,reverse?a+1:a,reverse?a:a+1);}}}return geometry(p,uv,ix);}
  function nasalUV(g){const uv=g.getAttribute('uv');for(let i=0;i<uv.count;i++)uv.setXY(i,(12+uv.getX(i)*2)/27,1-(11+uv.getY(i)*3)/27);return g;}
  function box(x,y,z,w,h,d){const g=new THREE.BoxGeometry(w,h,d);g.translate(x,y,z);const uv=g.getAttribute('uv');for(let i=0;i<uv.count;i++)uv.setY(i,1-uv.getY(i));return g;}
  function rigid(name,g,region,role){if(region==='face'){const uv=g.getAttribute('uv');for(let i=0;i<uv.count;i++)uv.setY(i,1-uv.getY(i));}return skin(name,g,region,()=>[[role,1]]);}
  function finalizeSkin(){
    for(const [bucket,parts]of Object.entries(fragments)){
      if(!parts.length)continue;const p=[],n=[],uv=[],indices=[],weights=[],partRanges=[];
      for(const part of parts){const g=part.g,a=g.getAttribute('position'),normal=g.getAttribute('normal'),tex=g.getAttribute('uv'),start=p.length/3;
        for(let i=0;i<a.count;i++){p.push(a.getX(i),a.getY(i),a.getZ(i));n.push(normal.getX(i),normal.getY(i),normal.getZ(i));uv.push(tex.getX(i),tex.getY(i));}
        indices.push(...part.indices);weights.push(...part.weights);partRanges.push({name:part.name,region:part.region,vertexStart:start,vertexCount:a.count});
      }
      const g=new THREE.BufferGeometry();g.setAttribute('position',new THREE.Float32BufferAttribute(p,3));g.setAttribute('normal',new THREE.Float32BufferAttribute(n,3));g.setAttribute('uv',new THREE.Float32BufferAttribute(uv,2));
      const name=MODE==='fps-arms'?'FPSArmsSkin':bucket,mesh=createSkinnedPart(name,g,material,{parent:root,bones,indices,weights});mesh.name=name;mesh.userData.nightmanSkin={version:1,group:name,parts:partRanges,sharedRig:'47 named joints; three finger phalanges and thumb CMC/MCP/IP',partRangeSpace:'pre-export non-indexed vertex stream; not compacted GLB accessor indices',palette:'nm-caretaker-clothing-skin'};
      if(bucket!=='ArmsSkin')markOpenShell(mesh,'Joined garment/face surfaces include intended open seams; pose and contact checks are separate from solid-volume QA');
    }
    root.userData.nightman.renderGroups={body:'BodySkin',head:'HeadSkin',arms:'ArmsSkin',fps:'FPSArmsSkin',ownViewHide:['HeadSkin','ArmsSkin']};
  }

  function bodyWeights(x,y){if(y<1.08)return blend('pelvis','spine',(y-.95)/.13);if(y<1.27)return blend('spine','chest',(y-1.08)/.19);return [['chest',1]];}
  if(MODE!=='fps-arms'){
    const torso=[{x:0,y:.91,z:0,rx:.10,rz:.16},{x:.01,y:1.02,z:0,rx:.102,rz:.165},{x:.02,y:1.15,z:0,rx:.11,rz:.18},{x:.028,y:1.29,z:0,rx:.10,rz:.183},{x:.035,y:1.385,z:0,rx:.095,rz:.205},{x:.041,y:1.41,z:0,rx:.075,rz:.185},{x:.045,y:1.425,z:0,rx:.055,rz:.073}];
    const front=skin('JacketFront',tube(torso,6,-Math.PI/2,Math.PI/2,false),'jacket-front',bodyWeights),back=skin('JacketBack',tube(torso,6,Math.PI/2,3*Math.PI/2,false),'jacket-back',bodyWeights);markOpenShell(front,'Garment shell open at waist and neck; sleeve and collar terminate inside it');markOpenShell(back,'Garment shell open at waist and neck; sleeve and collar terminate inside it');
    rigid('ShirtCollar',box(.101,1.36,0,.025,.17,.12),'shirt','chest');
    const lp=geometry([.101,1.435,-.071,.108,1.31,-.105,.132,1.35,-.025,.137,1.395,-.044,.101,1.435,.071,.108,1.31,.105,.132,1.35,.025,.137,1.395,.044],[0,0,0,1,1,1,.5,.3,1,0,1,1,0,1,.5,.3],[0,3,1,1,3,2,2,3,0,4,5,7,5,6,7,6,4,7]);const lapels=skin('JacketLapels',lp,'jacket-front',()=>[['chest',1]]);markOpenShell(lapels,'Two folded garment lapels anchored over the chest shell');
    skin('CollarStand',tube([{x:.05,y:1.412,z:0,rx:.056,rz:.067},{x:.05,y:1.444,z:0,rx:.053,rz:.061}],8),'sleeve',()=>[['chest',1]]);
    rigid('WorkBelt',tube([{x:0,y:.926,z:0,rx:.102,rz:.163},{x:0,y:.955,z:0,rx:.102,rz:.163}],12),'leather','pelvis');
    rigid('BeltBuckle',box(.11,.944,0,.018,.035,.04),'leather','pelvis');
    for(const side of [-1,1]){const z=side*.085;const pocket=geometry([.132-Math.abs(z-.045)*.2,1.225,z-.045,.132-Math.abs(z+.045)*.2,1.225,z+.045,.137-Math.abs(z+.045)*.2,1.185,z+.045,.137-Math.abs(z-.045)*.2,1.185,z-.045],[0,0,1,0,1,1,0,1],[0,1,2,0,2,3]);const flap=skin(side<0?'PocketFlapLeft':'PocketFlapRight',pocket,'pocket',bodyWeights);markOpenShell(flap,'Stitched chest pocket flap over the fitted jacket shell');}
    const head=positions.head;rigid('Neck',tube([{x:head.x-.01,y:1.425,z:0,rx:.041,rz:.047},{x:head.x,y:1.475,z:0,rx:.039,rz:.045}],8),'hand','neck');
    rigid('Head',tube([{x:head.x+.014,y:1.468,z:0,rx:.060,rz:.063},{x:head.x+.015,y:1.49,z:0,rx:.078,rz:.069},{x:head.x,y:1.57,z:0,rx:.094,rz:.088},{x:head.x-.01,y:1.65,z:0,rx:.084,rz:.078},{x:head.x-.015,y:1.683,z:0,rx:.065,rz:.065}],8),'face','head');
    const beard=skin('Beard',tube([{x:head.x+.028,y:1.468,z:0,rx:.052,rz:.043},{x:head.x+.019,y:1.490,z:0,rx:.081,rz:.061},{x:head.x+.012,y:1.535,z:0,rx:.092,rz:.081}],6,-Math.PI*.45,Math.PI*.45,false),'beard',()=>[['head',1]]);markOpenShell(beard,'Faceted beard surface fitted to chin and cheeks');
    rigid('Nose',nasalUV(tube([{x:head.x+.088,y:1.57,z:0,rx:.01,rz:.018},{x:head.x+.097,y:1.595,z:0,rx:.016,rz:.019},{x:head.x+.085,y:1.62,z:0,rx:.004,rz:.015}],4)),'face','head');
    for(const side of [-1,1])rigid(side<0?'EarLeft':'EarRight',tube([{x:head.x-.005,y:1.56,z:side*.085,rx:.016,rz:.012},{x:head.x+.006,y:1.615,z:side*.085,rx:.019,rz:.012}],6),'hand','head');
    rigid('Cap',tube([{x:head.x-.015,y:1.64,z:0,rx:.09,rz:.086},{x:head.x-.028,y:1.70,z:0,rx:.080,rz:.079},{x:head.x-.028,y:1.719,z:0,rx:.063,rz:.067}],8),'cap','head');
    rigid('CapBrim',box(head.x+.088,1.658,0,.17,.016,.16),'cap','head');
    skin('TrouserPelvis',tube([{x:0,y:.80,yWave:.075,z:0,rx:.085,rz:.13},{x:0,y:.87,z:0,rx:.10,rz:.16},{x:0,y:.972,z:0,rx:.101,rz:.164}],12),'trouser',(x,y,z)=>y>=.87?[['pelvis',1]]:blend('pelvis','hip_'+(z<0?'left':'right'),Math.min(.6,(.87-y)/.09)));
    for(const side of [-1,1]){const suffix=side<0?'left':'right',label=side<0?'Left':'Right';const hip=positions['hip_'+suffix],knee=positions['knee_'+suffix],ankle=positions['ankle_'+suffix];
      skin('Trouser'+label,tube([{x:hip.x,y:.96,z:side*.096,rx:.10,rz:.093},{x:hip.x,y:.80,z:side*.103,rx:.09,rz:.082},{x:knee.x,y:.57,z:side*.105,rx:.079,rz:.073},{x:knee.x,y:.49,z:side*.105,rx:.074,rz:.071},{x:ankle.x,y:.30,z:side*.105,rx:.069,rz:.064},{x:ankle.x,y:.15,z:side*.105,rx:.064,rz:.061}],8),'trouser',(x,y)=>y>.58?blend('hip_'+suffix,'knee_'+suffix,(.66-y)/.17):y>.25?blend('knee_'+suffix,'ankle_'+suffix,(.28-y)/.13):[['ankle_'+suffix,1]]);
      const boot=tube([{x:ankle.x+.032,y:.006,z:side*.105,rx:.147,rz:.079},{x:ankle.x+.045,y:.055,z:side*.105,rx:.153,rz:.082},{x:ankle.x+.019,y:.108,z:side*.105,rx:.102,rz:.076},{x:ankle.x-.01,y:.172,z:side*.105,rx:.063,rz:.061}],8);rigid('Boot'+label,boot,'boot','ankle_'+suffix);
    }
  }
  for(const side of [-1,1]){const suffix=side<0?'left':'right',label=side<0?'Left':'Right',shoulder=positions['shoulder_'+suffix],elbow=positions['elbow_'+suffix],wrist=positions['wrist_'+suffix];
    if(MODE==='fps-arms'){function sleeveLink(name,from,to,r0,r1,role,other){const delta=to.clone().sub(from),length=delta.length(),q=new THREE.Quaternion().setFromUnitVectors(new THREE.Vector3(0,-1,0),delta.clone().normalize()),rings=[{x:0,y:.008,z:0,rx:r0*.9,rz:r0*.9},{x:0,y:0,z:0,rx:r0,rz:r0},{x:0,y:-length*.45,z:0,rx:(r0+r1)/2,rz:(r0+r1)/2},{x:0,y:-length,z:0,rx:r1,rz:r1},{x:0,y:-length-.008,z:0,rx:r1*.9,rz:r1*.9}],g=tube(rings,8);g.applyQuaternion(q);g.translate(from.x,from.y,from.z);skin(name,g,'sleeve',(x,y,z)=>{if(!other)return[[role,1]];const t=Math.max(0,Math.min(1,new THREE.Vector3(x,y,z).sub(from).dot(delta)/(length*length)));return blend(role,other,t);});}sleeveLink('SleeveUpper'+label,shoulder,elbow,.064,.075,'shoulder_'+suffix,'elbow_'+suffix);sleeveLink('SleeveForearm'+label,elbow,wrist,.075,.045,'elbow_'+suffix); }else{
    const sleeveRings=[{x:shoulder.x,y:1.414,z:shoulder.z,rx:.012,rz:.012},{x:shoulder.x,y:1.395,z:shoulder.z,rx:.058,rz:.057},{x:shoulder.x+.008,y:1.35,z:shoulder.z+side*.022,rx:.068,rz:.067},{x:shoulder.x+.013,y:1.29,z:shoulder.z+side*.038,rx:.065,rz:.063},{x:elbow.x,y:1.19,z:elbow.z,rx:.076,rz:.077},{x:elbow.x,y:1.16,z:elbow.z,rx:.080,rz:.080},{x:elbow.x,y:1.13,z:elbow.z,rx:.080,rz:.080},{x:elbow.x+.004,y:1.10,z:elbow.z+side*.002,rx:.073,rz:.074},{x:elbow.x+.008,y:1.08,z:elbow.z+side*.004,rx:.064,rz:.065},{x:wrist.x,y:.945,z:wrist.z,rx:.049,rz:.048},{x:wrist.x,y:.90,z:wrist.z,rx:.044,rz:.045}];skin('Sleeve'+label,tube(MODE==='fps-arms'?sleeveRings.filter(r=>r.y<=1.19):sleeveRings),'sleeve',(x,y)=>y>1.23?[['shoulder_'+suffix,1]]:blend('shoulder_'+suffix,'elbow_'+suffix,(1.19-y)/.13));
    }
    skin('Hand'+label,tube([{x:wrist.x,y:.912,z:wrist.z,rx:.031,rz:.033},{x:wrist.x+.007,y:.86,z:wrist.z,rx:.029,rz:.040},{x:wrist.x+.012,y:.813,z:wrist.z,rx:.026,rz:.044},{x:wrist.x+.016,y:.787,z:wrist.z,rx:.024,rz:.038}].map(r=>MODE==='fps-arms'?{...r,y:r.y+wrist.y-.89}:r),8),'hand',()=>[['wrist_'+suffix,1]]);
    function phalanx(name,role,from,offset,radius){const axis=new THREE.Vector3(...offset),length=axis.length(),q=new THREE.Quaternion().setFromUnitVectors(new THREE.Vector3(0,-1,0),axis.normalize()),g=tube([{x:0,y:.003,z:0,rx:radius*.45,rz:radius*.45},{x:0,y:0,z:0,rx:radius,rz:radius},{x:0,y:-length+.003,z:0,rx:radius*.86,rz:radius*.86},{x:0,y:-length-.002,z:0,rx:radius*.35,rz:radius*.35}],8);g.applyQuaternion(q);g.translate(from.x,from.y,from.z);skin(name,g,'hand',()=>[[role,1]]);}
    for(let f=0;f<4;f++){const ls=FINGER_LENGTHS[f];for(let n=0;n<3;n++){const role='finger_'+suffix+'_'+f+'_'+['a','b','c'][n];phalanx('Finger'+label+f+['Proximal','Middle','Distal'][n],role,positions[role],[0,-ls[n],0],[.0095,.0085,.0075][n]);}}
    for(let n=0;n<3;n++){const role='thumb_'+suffix+'_'+['a','b','c'][n];phalanx('Thumb'+label+['Metacarpal','Proximal','Distal'][n],role,positions[role],n===0?[0,-.020,-side*.010]:n===1?[0,-.025,0]:[0,-.018,0],[.011,.009,.0075][n]);}
  }
  finalizeSkin();if(MODE==='fps-arms')root.userData.nightman.viewDerivative={version:2,rig:'Dedicated view sleeve origins behind fixed camera; authored baked elbow-position channels',shoulderOrigin:[-.24,1.48,.26],upperSleeve:'Continuous weighted origin-to-elbow reach',forearm:'Rigid articulated sleeve and exact body-derived hands',cameraMount:'fixed root camera_eye; no tracking/bob',worldAnatomy:'Full-body asset is authoritative world representation'};return root;
}
function animate(root){
  const j=root.userData.nightman.joints,clips=[],rot=(role,keys)=>rotationTrack(j[role],keys.map(k=>({time:k[0],rotation:k[1]})),'LINEAR'),pos=(role,keys)=>positionTrack(j[role],keys.map(k=>({time:k[0],position:k[1]})),'LINEAR');
  const qx=a=>new THREE.Quaternion().setFromAxisAngle(new THREE.Vector3(1,0,0),a*Math.PI/180),qy=a=>new THREE.Quaternion().setFromAxisAngle(new THREE.Vector3(0,1,0),a*Math.PI/180),qz=a=>new THREE.Quaternion().setFromAxisAngle(new THREE.Vector3(0,0,1),a*Math.PI/180);
  const interpolate=(keys,time)=>{let n=keys.findIndex(k=>k[0]>=time);if(n<=0)return keys[n<0?keys.length-1:0][1];const a=keys[n-1],b=keys[n],t=(time-a[0])/(b[0]-a[0]);return a[1]+(b[1]-a[1])*t;};
  const duration=1.2,times=[0,.15,.30,.45,.60,.75,.90,1.05,1.2],hipsL=[0,18,22,10,0,-18,-22,-10,0],kneesL=[0,-5,-12,-52,-60,-25,0,0,0],hipsR=hipsL.map((_,i)=>hipsL[(i+4)%8]),kneesR=kneesL.map((_,i)=>kneesL[(i+4)%8]);hipsR[8]=hipsR[0];kneesR[8]=kneesR[0];
  const gait=(time,suffix)=>{const t=time%1.2,h=interpolate(times.map((v,i)=>[v,(suffix==='left'?hipsL:hipsR)[i]]),t),k=interpolate(times.map((v,i)=>[v,(suffix==='left'?kneesL:kneesR)[i]]),t);return {hip:h,knee:k,ankle:-h-k};};
  const gaitHeight=time=>{const left=gait(time,'left'),right=gait(time,'right'),r=Math.PI/180,leg=v=>.43*Math.cos(v.hip*r)+.37*Math.cos((v.hip+v.knee)*r);return .02+.114+Math.max(leg(left),leg(right));};

  root.updateMatrixWorld(true);const basePelvis=root.getObjectByName(j.pelvis).position.clone(),shoulders={};for(const suffix of ['left','right'])shoulders[suffix]=root.worldToLocal(root.getObjectByName(j['shoulder_'+suffix]).getWorldPosition(new THREE.Vector3()));
  const poseReach={},events={};
  const breechKeys=[[0,0],[.55,-45],[2,-45],[2.4,0]],shellKeys=[[0,.027],[.55,.027],[.65,.010],[.72,.010],[1,-.085],[1.45,-.085],[1.8,.010],[1.96,.027],[2.4,.027]];
  function reloadGrip(time){const angle=interpolate(breechKeys,time),q=qz(angle),hinge=new THREE.Vector3(.200,.066,0),support=new THREE.Vector3(0,-.018,0).applyQuaternion(q).add(hinge),shell=new THREE.Vector3(interpolate(shellKeys,Math.min(time,1.8))+.0045-.105,.019,0).applyQuaternion(q).add(hinge);let blend=time<=.55?0:time<.72?(time-.55)/.17:time<=1.90?1:time<2?(2-time)/.10:0;return {point:support.lerp(shell,blend).sub(new THREE.Vector3(-.060,.046,0)).add(new THREE.Vector3(0,0,-interpolate([[0,0],[.22,.08],[.30,0],[.48,0],[.58,.08],[.67,.08],[.72,0],[1.82,0],[1.90,.08],[2.00,.08],[2.10,0],[2.18,.08],[2.40,0]],time))),rotation:q};}
  function poseAt(keys,time){let n=keys.findIndex(k=>k.time>=time);if(n<=0)return keys[n<0?keys.length-1:0];const a=keys[n-1],b=keys[n],t=(time-a.time)/(b.time-a.time);return {position:a.position.map((v,i)=>v+(b.position[i]-v)*t),angle:a.angle+(b.angle-a.angle)*t,crouch:(a.crouch??0)+((b.crouch??0)-(a.crouch??0))*t,yaw:(a.yaw??0)+((b.yaw??0)-(a.yaw??0))*t};}
  function held(name,length,keys,weapon,options={}){
    const samples=keys.length===2&&!options.walk&&name!=='Reload'?keys.map(k=>k.time):[...new Set([...Array.from({length:Math.round(length*30)+1},(_,i)=>Math.min(length,i/30)),...keys.map(k=>k.time),...(name==='Reload'?breechKeys.map(k=>k[0]).concat(shellKeys.map(k=>k[0]),[.15,.22,.30,.48,.58,.64,.67,.72,1.8,1.815,1.82,1.90,1.96,2,2.10,2.18,2.4]):[])])].sort((a,b)=>a-b),channels={},fpsElbowPositions={},pelvisKeys=[],legKeys={left:{hip:[],knee:[],ankle:[]},right:{hip:[],knee:[],ankle:[]}};let maxResidual=0,maxWristBend=0,maxWristTwist=0;
    const append=(role,q,time)=>{const c=channels[role]??(channels[role]={times:[],values:[],last:null});q.normalize();if(c.last&&c.last.dot(q)<0)q.set(-q.x,-q.y,-q.z,-q.w);c.times.push(time);c.values.push(q.x,q.y,q.z,q.w);c.last=q.clone();};
    for(const time of samples){const pose=poseAt(keys,time),toolQ=qy(pose.yaw??0).multiply(qz(pose.angle)),base=new THREE.Vector3(...pose.position),c=(pose.crouch??0)*Math.PI/180,pelvis=basePelvis.clone();if(options.walk&&MODE!=='fps-arms')pelvis.set(0,gaitHeight(time),0);else if(pose.crouch&&MODE!=='fps-arms')pelvis.set(.005-(.005*Math.cos(c)+.06*Math.sin(c)),.14-.035*Math.sin(c)+.8*Math.cos(c),0);pelvisKeys.push({time,position:pelvis.toArray()});
      for(const suffix of ['left','right']){
        if(options.leftOnly&&suffix==='right')continue;const side=suffix==='left'?-1:1;
        const shoulder=shoulders[suffix].clone().add(pelvis.clone().sub(basePelvis)),upper=root.getObjectByName(j['elbow_'+suffix]).position.clone(),fore=root.getObjectByName(j['wrist_'+suffix]).position.clone();let point=base.clone(),handQ=toolQ.clone();
        const restPalmDown=options.neutralBoth||side<0&&!options.leftOnly&&name!=='Reload',relaxedRight=restPalmDown&&side>0&&weapon==='empty';
        const frame=s=>graspFrame(s,options.leftOnly?'flashlight':side<0?'reload':weapon);
        if(restPalmDown){point.set((MODE==='fps-arms'?.65:.42)+(options.walk?side*.035*Math.sin(time/1.2*Math.PI*2):0),MODE==='fps-arms'?1.20:1.12,side*.27).add(pelvis.clone().sub(basePelvis));handQ=qz(90).multiply(qy(180));if(relaxedRight){point.set((MODE==='fps-arms'?.12:.065)+(options.walk?.035*Math.sin(time/1.2*Math.PI*2):0),MODE==='fps-arms'?.93:.88,MODE==='fps-arms'?.275:.245).add(pelvis.clone().sub(basePelvis));handQ=qy(90);}}
        else if(options.leftOnly)handQ.multiply(frame(-1));
        else if(side<0){const reload=reloadGrip(time);point.add(reload.point.applyQuaternion(toolQ));handQ.multiply(reload.rotation).multiply(frame(-1));const alpha=Math.max(0,Math.min(1,time/.22,(2.4-time)/.22)),neutral=new THREE.Vector3(MODE==='fps-arms'?.65:.42,MODE==='fps-arms'?1.20:1.12,-.27).add(pelvis.clone().sub(basePelvis));point.lerpVectors(neutral,point,alpha);handQ=qz(90).multiply(qy(180)).slerp(handQ,alpha);}
        else handQ.multiply(weapon==='shotgun'?qz(5.710593):new THREE.Quaternion()).multiply(frame(1));
        const wrist=point.clone().sub(new THREE.Vector3(...(restPalmDown?[.045,-.09,0]:gripDatum(options.leftOnly?'flashlight':side<0?'reload':weapon))).applyQuaternion(handQ)),towards=wrist.clone().sub(shoulder),distance=towards.length(),l1=upper.length(),l2=fore.length(),admitted=Math.max(.001,Math.min(distance,l1+l2-.0001));if(MODE!=='fps-arms')maxResidual=Math.max(maxResidual,Math.abs(distance-admitted));towards.normalize();
        let elbow;if(MODE==='fps-arms'){const foreAxis=new THREE.Vector3(0,-1,0);if(restPalmDown&&!relaxedRight)foreAxis.applyQuaternion(qz(-10));if(weapon==='shotgun'&&side>0)foreAxis.applyQuaternion(qx(-20));else if(options.leftOnly&&side<0)foreAxis.applyQuaternion(qx(30)).applyQuaternion(qz(12));foreAxis.applyQuaternion(handQ);if(weapon==='shotgun'&&(side>0||name==='Reload')){foreAxis.y=Math.max(.15,foreAxis.y);foreAxis.normalize();}elbow=wrist.clone().addScaledVector(foreAxis,-l2);}else{
        const cos=Math.max(-1,Math.min(1,(l1*l1+admitted*admitted-l2*l2)/(2*l1*admitted))),perpendicular=wrist.clone().addScaledVector(new THREE.Vector3(0,-1,0).applyQuaternion(handQ),-l2).sub(shoulder);perpendicular.addScaledVector(towards,-perpendicular.dot(towards));if(perpendicular.lengthSq()<1e-10)perpendicular.set(0,-1,side*.7).addScaledVector(towards,-perpendicular.dot(towards));perpendicular.normalize();const center=shoulder.clone().addScaledVector(towards,l1*cos),radius=l1*Math.sqrt(Math.max(0,1-cos*cos)),ortho=towards.clone().cross(perpendicular).normalize();elbow=center.clone().addScaledVector(perpendicular,radius);const frontLimit=.23+pelvis.x-basePelvis.x,constraints=name==='Reload'&&side<0?[{axis:0,sign:1,limit:frontLimit},{axis:2,sign:side,limit:.28}]:[{axis:2,sign:side,limit:.28}],outside=p=>constraints.some(c=>c.sign*p.getComponent(c.axis)>=c.limit-1e-8);
        if(!outside(elbow)){const candidates=[];for(const c of constraints){const a=c.sign*perpendicular.getComponent(c.axis),b=c.sign*ortho.getComponent(c.axis),amplitude=Math.hypot(a,b),wanted=(c.limit-c.sign*center.getComponent(c.axis))/radius;if(Math.abs(wanted)>amplitude+1e-6)continue;const offset=Math.atan2(b,a),angle=Math.acos(Math.max(-1,Math.min(1,wanted/amplitude)));for(const t of [offset+angle,offset-angle]){const p=center.clone().addScaledVector(perpendicular,radius*Math.cos(t)).addScaledVector(ortho,radius*Math.sin(t));if(outside(p))candidates.push(p);}}if(!candidates.length)throw Error(name+' elbow clearance exceeds reach');const handAxis=new THREE.Vector3(0,-1,0).applyQuaternion(handQ);elbow=candidates.sort((a,b)=>wrist.clone().sub(b).normalize().dot(handAxis)-wrist.clone().sub(a).normalize().dot(handAxis))[0];}
        }
        const upperQ=new THREE.Quaternion().setFromUnitVectors(upper.clone().normalize(),elbow.clone().sub(shoulder).normalize()),foreDirection=wrist.clone().sub(elbow).normalize(),localDirection=fore.clone().normalize(),localPalm=new THREE.Vector3(1,0,0).addScaledVector(localDirection,-localDirection.x).normalize(),worldPalm=new THREE.Vector3(1,0,0).applyQuaternion(handQ);worldPalm.addScaledVector(foreDirection,-worldPalm.dot(foreDirection)).normalize();const localFrame=new THREE.Matrix4().makeBasis(localPalm,localDirection,localPalm.clone().cross(localDirection).normalize()),worldFrame=new THREE.Matrix4().makeBasis(worldPalm,foreDirection,worldPalm.clone().cross(foreDirection).normalize()),foreQ=new THREE.Quaternion().setFromRotationMatrix(worldFrame.multiply(localFrame.invert()));
        const wristQ=foreQ.clone().invert().multiply(handQ),restAxis=new THREE.Vector3(0,-1,0),posedAxis=restAxis.clone().applyQuaternion(wristQ),bend=restAxis.angleTo(posedAxis)*180/Math.PI,swing=new THREE.Quaternion().setFromUnitVectors(restAxis,posedAxis),twist=swing.invert().multiply(wristQ),twistAngle=2*Math.acos(Math.min(1,Math.abs(twist.w)))*180/Math.PI;maxWristBend=Math.max(maxWristBend,bend);maxWristTwist=Math.max(maxWristTwist,twistAngle);
        if(MODE==='fps-arms'){const c=fpsElbowPositions[suffix]??(fpsElbowPositions[suffix]=[]);c.push({time,position:elbow.clone().sub(shoulder).applyQuaternion(upperQ.clone().invert()).toArray()});}append('shoulder_'+suffix,upperQ,time);append('elbow_'+suffix,upperQ.clone().invert().multiply(foreQ),time);append('wrist_'+suffix,foreQ.clone().invert().multiply(handQ),time);
      }
      for(const suffix of ['left','right'])for(const role of ['hip','knee','ankle'])legKeys[suffix][role].push({time,rotation:[0,0,options.walk?gait(time,suffix)[role]:role==='knee'?-2*(pose.crouch??0):pose.crouch??0]});
    }
    if(maxResidual>.003)throw Error(name+' authored hand target exceeds anatomical reach');
    const tracks=Object.entries(channels).map(([role,v])=>new THREE.QuaternionKeyframeTrack(j[role]+'.quaternion',v.times,v.values));for(const [suffix,keys]of Object.entries(fpsElbowPositions))tracks.push(positionTrack(j['elbow_'+suffix],keys,'LINEAR'));
    if(MODE!=='fps-arms'&&!options.leftOnly&&(options.walk||name==='AxeUse')){tracks.push(positionTrack(j.pelvis,pelvisKeys,'LINEAR'),rot('chest',[[0,[0,0,0]],[length,[0,0,0]]]));for(const suffix of ['left','right'])for(const role of ['hip','knee','ankle'])tracks.push(rotationTrack(j[role+'_'+suffix],legKeys[suffix][role],'LINEAR'));}
    for(const suffix of ['left','right']){if(options.leftOnly&&suffix==='right'||!options.leftOnly&&suffix==='left'&&name!=='Reload'||weapon==='empty')continue;
      const rotations=graspRotations(suffix==='left'?-1:1,options.leftOnly?'flashlight':suffix==='left'?'reload':weapon);
      if(name==='Reload'&&suffix==='left'){
        const pinch=graspRotations(-1,'reload','shell'),frames=[[0,'empty'],[.30,'empty'],[.36,'foreend'],[.42,'foreend'],[.48,'empty'],[.55,'empty'],[.67,'shell'],[1.80,'shell'],[1.82,'empty'],[2.10,'empty'],[2.14,'foreend'],[2.18,'foreend'],[2.24,'empty'],[2.40,'empty']];
        for(const role of Object.keys(rotations)){const roleFrames=role.startsWith('thumb_left')?[[0,'empty'],[.15,'empty'],[.22,'foreend'],[.58,'foreend'],[.64,'empty'],[.67,'shell'],[1.80,'shell'],[1.815,'release'],[1.90,'release'],[1.96,'empty'],[2.00,'foreend'],[2.24,'foreend'],[2.40,'empty']]:role.startsWith('finger_left_0')?[[0,'empty'],[.30,'empty'],[.36,'foreend'],[.42,'foreend'],[.48,'empty'],[.55,'empty'],[.67,'shell'],[1.80,'shell'],[1.815,'release'],[1.90,'release'],[1.96,'empty'],[2.10,'empty'],[2.14,'foreend'],[2.18,'foreend'],[2.24,'empty'],[2.40,'empty']]:[[0,'empty'],[.30,'empty'],[.36,'foreend'],[.42,'foreend'],[.48,'empty'],[.55,'empty'],[.67,'shell'],[1.90,'shell'],[1.96,'empty'],[2.10,'empty'],[2.14,'foreend'],[2.18,'foreend'],[2.24,'empty'],[2.40,'empty']],times=roleFrames.map(k=>k[0]),values=[];let previous;for(const [,state]of roleFrames){const q=state==='empty'?new THREE.Quaternion():state==='release'?pinch[role].clone().premultiply(qz(role.endsWith('_a')?(role.startsWith('thumb')?15:-15):0)):(state==='shell'?pinch[role]:rotations[role]).clone();if(previous&&previous.dot(q)<0)q.set(-q.x,-q.y,-q.z,-q.w);values.push(...q.toArray());previous=q;}tracks.push(new THREE.QuaternionKeyframeTrack(j[role]+'.quaternion',times,values));}
        for(const role of ['finger_left_0_a','thumb_left_a']){const rest=root.getObjectByName(j[role]).position.clone(),times=[0,.55,.67,1.90,1.96,2.40],values=times.flatMap(t=>[rest.x,rest.y,t>=.67&&t<=1.90?0:rest.z]);tracks.push(new THREE.VectorKeyframeTrack(j[role]+'.position',times,values));}
      }else {for(const [role,q]of Object.entries(rotations)){const values=q.toArray();tracks.push(new THREE.QuaternionKeyframeTrack(j[role]+'.quaternion',[0,length],[...values,...values]));}if(suffix==='right'&&weapon==='shotgun'){tracks.push(pos('thumb_right_a',[[0,[.027,-.076,.040]],[length,[.027,-.076,.040]]]),pos('finger_right_0_a',[[0,[.034,-.106,.043]],[length,[.034,-.106,.043]]]));const ready=triggerIndexRotations(),fired=triggerIndexRotations(true),frames=name==='ShotgunFire'?[[0,ready],[.012,ready],[.020,fired],[.055,fired],[.16,ready],[.32,ready]]:[[0,ready],[length,ready]];for(const role of Object.keys(ready)){const times=frames.map(f=>f[0]),values=[];let previous;for(const [,pose]of frames){const q=pose[role].clone();if(previous&&previous.dot(q)<0)q.set(-q.x,-q.y,-q.z,-q.w);values.push(...q.toArray());previous=q;}tracks.push(new THREE.QuaternionKeyframeTrack(j[role]+'.quaternion',times,values));}}}
    }
    poseReach[name]={maxWristBendDegrees:maxWristBend,maxWristTwistDegrees:maxWristTwist,palmRest:'ground-facing; forward relaxed forearms',samples:samples.length,sampleRate:keys.length===2&&!options.walk&&name!=='Reload'?null:30,maxUnreachableResidualMeters:maxResidual,leftHand:options.leftOnly?'flashlight':name==='Reload'?'reload-shell/foreend':'empty-rest',rightHand:options.leftOnly?'unmodified':weapon};return createClip(name,length,tracks,{loop:!!options.walk||!!options.leftOnly||!!options.loop});
  }
  const neutralPose={position:[.34,1.12,.27],angle:0,crouch:0};
  clips.push(held('Idle',3,[{time:0,...neutralPose},{time:3,...neutralPose}],'empty',{neutralBoth:true,loop:true}),held('Walk',1.2,[{time:0,...neutralPose},{time:1.2,...neutralPose}],'empty',{neutralBoth:true,walk:true}));
  const axePose={position:[.45,1.38,.24],angle:10,crouch:0},gunPose={position:MODE==='fps-arms'?[.72,1.14,.24]:[.34,1.10,.24],angle:0,crouch:0},constant=(pose,length)=>[{time:0,...pose},{time:length,...pose}];
  clips.push(held('AxeHold',1,constant(axePose,1),'axe'));
  clips.push(held('AxeUse',1.4,[{time:0,...axePose},{time:.4,position:[.43,1.43,.24],angle:20,crouch:0},{time:.812,position:[.38,.91,.24],angle:-80,crouch:35},{time:1.05,position:[.40,1.10,.24],angle:-65,crouch:25},{time:1.4,...axePose}],'axe'));
  clips.push(held('GripAim',1,constant(gunPose,1),'shotgun')); // GripAim is the single canonical shotgun hold
  clips.push(held('ShotgunFire',.32,[{time:0,...gunPose},{time:.055,...gunPose,position:[gunPose.position[0]-.035,gunPose.position[1]+.008,.24],angle:1.5,crouch:0},{time:.32,...gunPose}],'shotgun'));
  clips.push(held('Reload',2.4,[{time:0,...gunPose},{time:.3,...gunPose,yaw:35,angle:30,position:MODE==='fps-arms'?[.78,1.10,.20]:[.28,1.08,.20]},{time:2.1,...gunPose,yaw:35,angle:30,position:MODE==='fps-arms'?[.78,1.10,.20]:[.28,1.08,.20]},{time:2.4,...gunPose}],'shotgun'));
  clips.push(held('WalkAxe',1.2,constant(axePose,1.2),'axe',{walk:true}),held('WalkShotgun',1.2,constant(gunPose,1.2),'shotgun',{walk:true}));
  clips.push(held('FlashlightHold',1,constant({position:MODE==='fps-arms'?[.65,1.32,-.24]:[.22,1.36,-.16],angle:0,crouch:0},1),'flashlight',{leftOnly:true}));
  const contract=new THREE.Object3D();contract.name='CaretakerAnimationContract';contract.userData.caretakerAnimation={version:3,handFrame:{palmNormalLocal:[1,0,0],fingerLongAxisLocal:[0,-1,0],knuckleRowLocal:[0,0,1],neutralPalmWorld:[0,-1,0],neutralBodyGrip:[.34,1.12,.27],neutralFpsGrip:[.65,1.20,.27],toolGripDatums:{axe:gripDatum('axe'),shotgun:gripDatum('shotgun'),flashlight:gripDatum('flashlight'),reload:gripDatum('reload')},grasp:'Actual exported per-row handle polygon tangent wraps; mirrored fingers, opposing CMC/MCP/IP thumb',elbowClearance:{lateralMeters:.28,reloadLeftFrontMeters:.23},reloadFrame:{shaftRollDegrees:-40,knuckleRowTool:'-X',palm:'up toward foreend and inward',fingers:'down and around foreend'}},wristGuide:{observedMaxBendDegrees:Math.max(...Object.values(poseReach).map(p=>p.maxWristBendDegrees)),observedMaxTwistDegrees:Math.max(...Object.values(poseReach).map(p=>p.maxWristTwistDegrees)),scope:'Measured authored rotations; per-clip values are in CaretakerPoseDiagnostics. Lower-elbow FPS shotgun presentation is distinct from the full-body pose.'},events:{AxeUse:[{phase:.58,event:'cut_window_begin'},{phase:.68,event:'cut_window_end'}],ShotgunFire:[{phase:.0625,event:'fire'}],Reload:[{phase:.3,event:'extract_shells'},{phase:.75,event:'insert_shells'},{phase:1,event:'breech_closed'}]},reload:{duration:2.4,breechKeys,shellKeys,leftContact:[.72,1.8],mechanism:'side-by-side break action',hand:'right holds stock; left grasps pair of shell heads then returns foreend'},walk:{duration:1.2,runTimeScale:1.6,cameraMotion:false},flashlight:{overlay:'left arm/fingers only',socket:'grip_left_flashlight',off:'empty left rest',reload:'consumer switches off/stows before Reload; does not auto-resume'}};root.add(contract);const diagnostics=new THREE.Object3D();diagnostics.name='CaretakerPoseDiagnostics';diagnostics.userData.caretakerPoseDiagnostics={version:1,poseReach,guide:'Native sample wrist/IK guide; actual attached skin/tool surface evidence is separate'};root.add(diagnostics);
  return clips;
}