{"job_id":"anim-job-1f9c36b6-f267-44b2-9944-673ec81b373f","request_id":"bulk-2026-05-21T02-24-03-126Z-5-a1-physics.09.laws-of-motion.action-reaction-pairs","status":"complete","asset":{"primary_url":"https://storage.googleapis.com/pupiltree-animation-assets/anim-job-1f9c36b6-f267-44b2-9944-673ec81b373f/walkthrough.mp4","thumbnail_url":"https://storage.googleapis.com/pupiltree-animation-assets/anim-job-1f9c36b6-f267-44b2-9944-673ec81b373f/thumb.jpg","transcript_url":"https://storage.googleapis.com/pupiltree-animation-assets/anim-job-1f9c36b6-f267-44b2-9944-673ec81b373f/transcript.vtt","interactive_url":"https://storage.googleapis.com/pupiltree-animation-assets/anim-job-1f9c36b6-f267-44b2-9944-673ec81b373f/index.html","scenefile_url":"https://storage.googleapis.com/pupiltree-animation-assets/anim-job-1f9c36b6-f267-44b2-9944-673ec81b373f/scene-source.json","duration_seconds":15,"byte_size":469815,"renderer":"html_three_js_local","parameters":{"style":"auto","executor":"native_render_executor","localPath":"/app/storage/assets/anim-job-1f9c36b6-f267-44b2-9944-673ec81b373f","interactivity":"none","renderer_style":"three_js","durationSeconds":15,"render_manifest":{"jobId":"anim-job-1f9c36b6-f267-44b2-9944-673ec81b373f","request":{"gap":{"topic":"laws_of_motion-action_reaction_pairs","severity":"moderate","error_type":"concept_misunderstanding","memory_state":"fragile","display_topic":"Action-Reaction Pairs","common_wrong_answer":"The concept works the same way in all conditions.","confidence_at_error":"high","correct_understanding":"The concept depends on constraints, assumptions, and variable relationships."},"target":{"style":"auto","render":{"fps":30,"format":"mp4","resolution":"1920x1080","include_thumbnail":true,"include_transcript":true},"audience":{"tone":"neutral_instructional","grade":"9","language":"en"},"interactivity":"none","duration_seconds":15},"context":{"chapter":{"name":"Laws of Motion","ncert_class":9},"sub_topics":[{"topic":"laws_of_motion-action_reaction_pairs","key_concepts":["Action-Reaction Pairs","Laws of Motion"]}]},"metadata":{"priority":"normal","trace_id":"bulk-run-2026-05-21T02-24-03-126Z"},"exam_type":"neet","asset_type":"simulation","request_id":"bulk-2026-05-21T02-24-03-126Z-5-a1-physics.09.laws-of-motion.action-reaction-pairs","subject_area":"physics"},"renderer":"html_three_js_local","storyboard":{"beats":[{"label":"Topic","visual":"Show the topic title and the key physical context.","narration":"Action-Reaction Pairs"},{"label":"Mistake","visual":"Show the wrong approach and why it seems plausible.","narration":"The concept works the same way in all conditions."},{"label":"Correction","visual":"Show the right approach step by step.","narration":"The concept depends on constraints, assumptions, and variable relationships."},{"label":"Concept","visual":"Highlight the key formula and the governing relationship.","narration":"Action-Reaction Pairs. Laws of Motion"}],"title":"Action-Reaction Pairs","sceneCode":"<!doctype html>\n<html lang=\"en\">\n<head>\n  <meta charset=\"utf-8\"/>\n  <meta name=\"viewport\" content=\"width=device-width, initial-scale=1\"/>\n  <title>Action-Reaction Pairs: Constraints Matter</title>\n  <style>\n    :root{--bg:#101417;--panel:#1c232e;--line:#3b4a55;--accent:#e0b15b;--text:#f3f7fa;--muted:#a8b4bf;--blue:#4ea8ff;--green:#8decb0;--red:#df8279;}\n    *{box-sizing:border-box;}\n    body{margin:0;font-family:\"Plus Jakarta Sans\",\"Manrope\",\"Inter\",ui-sans-serif,system-ui,sans-serif;background:radial-gradient(120% 90% at 20% -5%,#2a3944 0%,var(--bg) 58%);color:var(--text);}\n    main{min-height:100vh;display:grid;grid-template-columns:minmax(300px,380px) 1fr;}\n    aside{border-right:1px solid var(--line);background:linear-gradient(180deg,rgba(28,35,46,.86),rgba(14,18,26,.94));padding:24px;overflow:auto;backdrop-filter:blur(6px);}\n    section{padding:24px;display:grid;place-items:center;}\n    h1{margin:0 0 10px;font-size:1.65rem;line-height:1.15;}\n    .sub{margin:0 0 16px;color:var(--muted);}\n    .formula{margin:0 0 14px;padding:10px;border:1px solid var(--line);border-radius:10px;background:#162029;color:var(--accent);font-family:ui-monospace,monospace;font-size:0.9rem;box-shadow:inset 0 0 28px rgba(224,177,91,.14);}\n    .control{display:grid;gap:6px;margin:12px 0;}\n    .control input{width:100%;accent-color:var(--accent);}\n    ul{margin:14px 0 0 18px;padding:0;color:var(--muted);display:grid;gap:6px;}\n    .stage{width:min(1020px,95%);aspect-ratio:16/9;border:1px solid #4b6170;border-radius:14px;position:relative;overflow:hidden;background:radial-gradient(circle at 50% 38%,#3f6272,#141b22 72%);box-shadow:0 18px 60px rgba(0,0,0,.42), inset 0 0 90px rgba(255,255,255,.05);}\n    .stage::before{content:\"\";position:absolute;inset:0;background:linear-gradient(180deg,rgba(255,255,255,.06),transparent 34%);pointer-events:none;}\n    .legend{position:absolute;right:12px;top:12px;padding:8px 10px;border-radius:10px;border:1px solid #465a64;background:rgba(9,14,18,.58);font-size:0.8rem;color:var(--muted);backdrop-filter:blur(4px);}\n    @media(max-width:900px){main{grid-template-columns:1fr;}aside{border-right:0;border-bottom:1px solid var(--line);}}\n  </style>\n</head>\n<body>\n<main>\n  <aside>\n    <h1>Action-Reaction</h1>\n    <p class=\"sub\">Why Constraints Matter</p>\n    <p class=\"formula\">F_A = −F_R (in isolation)</p>\n    <label class=\"control\"><span>Scene: <strong id=\"v-scene\">Free</strong></span><input id=\"c-scene\" type=\"range\" min=\"0\" max=\"2\" step=\"1\" value=\"0\"/></label>\n    <label class=\"control\"><span>Mass Ratio: <strong id=\"v-mass\">1:1</strong></span><input id=\"c-mass\" type=\"range\" min=\"0.5\" max=\"4\" step=\"0.5\" value=\"1\"/></label>\n    <ul>\n      <li><strong>❌ Misconception:</strong> Equal forces always produce equal accelerations</li>\n      <li><strong>✓ Truth:</strong> F = ma; acceleration depends on <em>both</em> force <em>and</em> mass</li>\n      <li><strong>🔑 Key:</strong> Free vs. constrained systems behave differently</li>\n      <li><strong>📊 Watch:</strong> Same force pair, different outcomes</li>\n    </ul>\n  </aside>\n  <section>\n    <div class=\"stage\" id=\"stage\">\n      <div class=\"legend\" id=\"legend\">Ready</div>\n      <canvas id=\"sim-cv\" style=\"position:absolute;inset:0;width:100%;height:100%;\"></canvas>\n    </div>\n  </section>\n</main>\n<script>\nconst controls = [\n  {\"key\":\"scene\",\"label\":\"Scene\",\"min\":0,\"max\":2,\"step\":1,\"value\":0,\"units\":\"\"},\n  {\"key\":\"mass\",\"label\":\"Mass Ratio\",\"min\":0.5,\"max\":4,\"step\":0.5,\"value\":1,\"units\":\"\"}\n];\nfor(const c of controls){\n  const inp=document.getElementById('c-'+c.key);\n  const out=document.getElementById('v-'+c.key);\n  inp?.addEventListener('input',()=>{\n    if(c.key==='scene'){\n      const labels=['Free Objects','Linked (Rope)','Fixed Wall'];\n      out.textContent=labels[inp.value]||'Free';\n    }else if(c.key==='mass'){\n      out.textContent=inp.value+':1';\n    }\n    window.updateModel?.();\n  });\n}\n(function(){\n  const cv=document.getElementById('sim-cv');\n  const ctx=cv.getContext('2d');\n  function resize(){const r=cv.getBoundingClientRect();if(r.width>0){cv.width=r.width;cv.height=r.height;}}\n  resize();new ResizeObserver(resize).observe(cv);\n  \n  // State: simulation time, object positions/velocities\n  let time=0;\n  let scene_type=0;\n  let mass_ratio=1;\n  \n  // Object A: left side\n  let posA=0, velA=0;\n  // Object B: right side\n  let posB=0, velB=0;\n  \n  // Trail history\n  let trailA=[], trailB=[];\n  const max_trail=40;\n  \n  function glowDot(x,y,r,color,a){\n    const g=ctx.createRadialGradient(x,y,0,x,y,r*2.6);\n    g.addColorStop(0,color.replace('ALPHA',String(a)));\n    g.addColorStop(1,color.replace('ALPHA','0'));\n    ctx.fillStyle=g;ctx.beginPath();ctx.arc(x,y,r*2.6,0,Math.PI*2);ctx.fill();\n  }\n  \n  function trail(points,color){\n    if(points.length<2)return;\n    ctx.strokeStyle=color;ctx.lineWidth=2;ctx.globalAlpha=0.35;\n    ctx.beginPath();ctx.moveTo(points[0].x,points[0].y);\n    for(let i=1;i<points.length;i++)ctx.lineTo(points[i].x,points[i].y);\n    ctx.stroke();ctx.globalAlpha=1;\n  }\n  \n  function arrow(x1,y1,x2,y2,color,width=2){\n    const dx=x2-x1,dy=y2-y1,l=Math.sqrt(dx*dx+dy*dy);\n    if(l<2)return;\n    const nx=dx/l,ny=dy/l,s=12;\n    ctx.strokeStyle=color;ctx.lineWidth=width;ctx.beginPath();ctx.moveTo(x1,y1);ctx.lineTo(x2,y2);ctx.stroke();\n    ctx.fillStyle=color;ctx.beginPath();ctx.moveTo(x2,y2);\n    ctx.lineTo(x2-s*nx+s*0.4*ny,y2-s*ny-s*0.4*nx);\n    ctx.lineTo(x2-s*nx-s*0.4*ny,y2-s*ny+s*0.4*nx);ctx.fill();\n  }\n  \n  let lastTs=0;\n  function tick(ts){\n    const dt=Math.min(0.04,(ts-lastTs)/1000);lastTs=ts;\n    const W=cv.width,H=cv.height;\n    \n    // Read sliders\n    scene_type=parseInt(document.getElementById('c-scene').value);\n    mass_ratio=parseFloat(document.getElementById('c-mass').value);\n    \n    time+=dt;\n    \n    // Apply physics based on scene type\n    const mA=1;\n    const mB=mass_ratio;\n    const force_mag=120; 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