ABCDwater

重写内容

坠落伤害预测 — 完全重写

不再简单地向下扫地面，改为模拟下一 tick 的物理运动预测是否会撞地受伤：

python
每 tick 预测：
1. 取当前 motionY
2. 模拟重力加速度: nextMotionY = (motionY - 0.08) × 0.98
3. 计算下一 tick 位置: nextY = currentY + motionY
4. 检查 nextY 下方是否非空气 → 会落地？
5. 若是，计算累积 fallDistance + 本次下落距离
6. 若 > 3.5 → 触发落地水！仅在有摔伤风险时出手


| 新逻辑                 | 旧逻辑         |
|------------------------|----------------|
| 预测下一 tick 是否落地 | 向下扫描找地面 |
| 计算精确摔落伤害值     | 固定 2 格触发  |
| 仅在有伤害时放水       | 3.5 格内都触发 |
| 考虑运动速度           | 忽略速度       |

回收逻辑 — 完全重写

- 落地后持续尝试 useItemOn 水源（最多 40 tick ≈ 2 秒）
- 每次打印 result=，方便排查
- 水源消失后自动放弃
- 不依赖 isInWater() 判断，落地即尝试


Rewritten content

Fall Damage Prediction — Complete Rewrite

Instead of simply scanning the ground from top to bottom, we now simulate the physical motion for the next tick to predict whether a collision with the ground will result in injury:

python
Prediction per tick:
1. Take the current motionY
2. Simulate gravitational acceleration: nextMotionY = (motionY - 0.08) × 0.98
3. Calculate the position for the next tick: nextY = currentY + motionY
4. Check if the area below `nextY` is not air → Will the character land?
5. If so, add the current fall distance to the cumulative `fallDistance`
6. If > 3.5 → Trigger the ‘landing water’ effect! Only activate when there is a risk of fall damage


| New logic                 | Old logic         |
|---------------------- --|----------------|
| Predict whether a fall will occur in the next tick | Scan downwards for ground |
| Calculate precise fall damage value     | Triggered at a fixed 2-block distance  |
| Release water only when damage is incurred       | Triggered within 3.5 blocks |
| Takes movement speed into account | Ignores speed       |

Recovery logic — completely rewritten

- Continues to attempt `useItemOn` on the water source after landing (up to 40 ticks ≈ 2 seconds)
- Prints `result=` each time to aid troubleshooting
- Automatically gives up once the water source disappears
- Does not rely on `isInWater()` for judgement; attempts immediately upon landing

Translated with DeepL.com (free version)