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Firecracker box chain reaction in three.js

Simulations & physicsvery hardbuild testPrompt in Chinesethree.jsphysicsparticlesChinese

What it tests: A long, number-heavy three.js spec: 100 colliding firecrackers, timed fuses, shock waves, fire-radius ignition with random delays, particles, dynamic lights and three required classes. It tests whether the model keeps every number and mechanic straight.

Prompt length: 2,500 characters, roughly 1,670 tokens (estimate). Set a large context in your runner so the prompt and a long answer both fit.

Prompt
请使用 three.js 实现一个逼真的"鞭炮箱子"3D爆炸连锁反应演示。所有代码（包括HTML, CSS, JavaScript）都必须封装在一个独立的HTML文件中。

**场景设置：**
1. **平面：** 创建一个尺寸为1000×1000的灰色、光滑的水平平面，能接收阴影。地面材质使用```{color: 0x808080, roughness: 0.8, metalness: 0.1}```。

2. **鞭炮建模：**
   - **主体：** 红色圆柱体，高度1，直径0.2，材质使用```{color: 0xff0000, roughness: 0.6, metalness: 0.2}```
   - **封土：** 圆柱体顶部和底部各有一个土黄色的小圆柱，高度0.05，材质```{color: 0xdaa520, roughness: 0.8}```
   - **引线：** 从顶部封土中心伸出的蓝绿色细圆柱，长度0.5，直径0.05，材质```{color: 0x20b2aa, roughness: 0.4}```
   - **碰撞体积：** 鞭炮之间有碰撞体积, 防止模型互相重叠 
   - **燃烧状态：** 引线顶端需要能显示小的橙红色发光球体模拟火星

3. **透明箱子：**
   - 尺寸：10×10×8的透明玻璃箱子， 顶部没有碰撞体积， 其他面则有碰撞体积，材质```{color: 0xffffff, transparent: true, opacity: 0.15, roughness: 0.1, metalness: 0.0}```
   - **箱子内部：** 动画开始时随机从箱子顶部5的聚集开始按照每组10个生成鞭炮, 生成总计10组, 鞭炮自由落体到箱子内部
   - **箱子位置：** 放置在平面中心偏后的位置

**爆炸与连锁反应模拟：**

1. **触发机制：**
   - 页面底部提供"开始燃放"按钮触发动画
   - 一个已燃烧的鞭炮从屏幕上方以抛物线轨迹落入箱子中

2. **引线燃烧效果：**
   - **燃烧动画：** 引线在2秒内从顶端向下逐渐缩短，燃烧部分显示橙红色发光效果

3. **爆炸效果：**
   - **瞬间替换：** 鞭炮爆炸瞬间消失，替换为大量彩色纸屑碎片
   - **纸屑系统：** 生成50-80个小的彩色方形/矩形碎片，颜色为红色
   - **爆炸冲击波：** 产生球形扩散的透明冲击波效果，影响周围鞭炮
   - **碎片物理：** 纸屑具有初始向外的速度，受重力影响，有随机旋转动画

4. **冲击力与弹射：**
   - **影响范围：** 爆炸中心半径2-3单位内的鞭炮受到冲击
   - **弹射动画：** 被冲击的鞭炮以随机方向和力度弹开1-5单位距离
   - **旋转效果：** 弹射的鞭炮具有随机的翻滚旋转动画
   - **碰撞检测：** 弹射的鞭炮与箱壁、地面产生反弹效果

5. **火光传播与连锁反应：**
   - **火光范围：** 每次爆炸产生半径3单位的火光球形区域，持续0.5-1秒
   - **引燃机制：** 火光范围内未爆炸鞭炮的引线自动点燃，开始1秒燃烧倒计时
   - **传播延迟：** 不同鞭炮的引燃有0.1-0.3秒的随机延迟，避免同时爆炸
   - **连锁扩散：** 形成真实的多米诺骨牌式连锁反应

6. **环境交互效果：**
   - **地面冲击：** 落地的鞭炮和碎片在地面产生小的冲击反弹
   - **碎片堆积：** 纸屑碎片最终散落在地面和箱子周围，形成堆积效果

**高级视觉效果：**

1. **粒子系统增强：**
   - **火花粒子：** 燃烧引线和爆炸时产生明亮的火花，有拖尾效果
   - **烟雾效果：** 爆炸后产生灰白色烟雾粒子，缓慢上升并逐渐消散
   - **光晕效果：** 爆炸瞬间产生明亮的光晕，照亮周围区域

2. **动态光照：**
   - **爆炸闪光：** 每次爆炸时创建瞬间的点光源，模拟爆炸闪光
   - **引线火光：** 燃烧的引线产生小的动态点光源
   - **颜色温度：** 光源颜色从橙红色到亮白色变化

**光照与渲染设置：**

1. **光源配置：**
   - **主光源：** 45度角的定向光```DirectionalLight```，强度1.2，能投射阴影
   - **环境光：** 强度0.4的环境光，确保场景无纯黑区域
   - **动态光源：** 爆炸和燃烧产生的临时点光源

2. **阴影系统：**
   - 启用渲染器阴影贴图```renderer.shadowMap.enabled = true```
   - 所有鞭炮、箱子能投射阴影```castShadow = true```
   - 地面接收阴影```receiveShadow = true```
   - 动态阴影更新以体现运动物体

3. **后期效果：**
   - 爆炸时启用临时的屏幕闪白效果
   - 可选择性添加轻微的镜头震动效果

**摄像机与控制：**
- 摄像机从斜45度角俯视整个场景，距离箱子约15单位
- 可鼠标控制
- 确保能完整观察到连锁反应的全过程和碎片散落效果

**代码结构要求：**
- 创建独立的```Firecracker```类管理单个鞭炮状态
- 创建```ExplosionSystem```类管理爆炸效果和粒子
- 创建```ChainReactionManager```类控制连锁反应逻辑
- 所有物理计算使用简化但真实的运动方程
- 代码中添加详细注释，特别是爆炸传播和物理模拟部分
- 性能优化：合理控制粒子数量

**交互控制：**
- 提供"重置场景"按钮重新开始演示
- 可选择添加"单个引爆"模式，点击特定鞭炮进行局部引爆测试
- 显示当前未爆炸鞭炮数量和已发生爆炸次数的统计信息
English translation (English summary translation by BranoLabs (CC BY-NC-SA 4.0). The original gives exact materials and numbers; use it for comparable results.)
Translation
In a single HTML file with three.js, build a realistic 3D chain reaction in a box of firecrackers. A grey 1000×1000 ground plane receives shadows. Each firecracker is a red cylinder (height 1, diameter 0.2) with clay caps and a teal fuse, with collision volumes. A transparent 10×10×8 glass box (open top, solid sides) gets 10 groups of 10 firecrackers dropped in at the start. A 'start' button throws a lit firecracker in on a parabola. Fuses burn down over 2 s; an exploding firecracker is replaced by 50–80 red paper fragments with gravity and spin, plus a spherical shock wave that knocks firecrackers within 2–3 units 1–5 units away, tumbling and bouncing off the walls and ground. Each blast creates a fire sphere of radius 3 for 0.5–1 s that ignites fuses inside it after a random 0.1–0.3 s delay, followed by a 1 s fuse countdown, giving a domino-like chain. Add sparks with trails, rising smoke, flash point lights, a 45° directional light with shadows, ambient light at 0.4, a brief white flash and optional camera shake, a mouse-controlled camera at 45° about 15 units away, Firecracker, ExplosionSystem and ChainReactionManager classes, a reset button, an optional click-to-detonate mode, and counters for remaining firecrackers and explosions.

How to grade it

Checklist from the prompt: 100 firecrackers fall into the box and come to rest without overlapping; the start button throws a lit one in on a parabola; the fuse visibly shortens over 2 s; an explosion swaps the model for 50–80 fragments; nearby firecrackers are knocked away and tumble; ignition spreads with random delays (not one simultaneous blast); lights, shadows, smoke and sparks are present; the three named classes exist; reset works; counters are correct; the frame rate stays usable.

Scorecard tick what the model got right: 0/11

Runs in your browser; nothing is saved or sent.

0/11

Where models usually fail

Everything explodes at once; firecrackers fall through the box floor; particles never cleaned up, so FPS collapses; the named classes missing; the given materials ignored.

Running it

KCORES runs each model 3 times, keeps the best run and scores it visually at 2K full screen. Temperature 0 makes your own runs comparable.

Source

Author
karminski-牙医
From
KCORES prompt collection (gist)
Exact file or post
https://gist.github.com/karminski/d71b4c83b761538002593dec0014a21a/60dd0d73ec50ef4e027c17b5c3efd282ffac6c18
Licence
CC BY-NC-SA 4.0
How we use it
Full text (licence allows reuse)

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