智能拾取与背包分发系统 (MC 26.1.2)
本文档深入解析 Minecraft 26.1.2 下 Item Clumps 的分块迭代背包吸纳、容量模拟、纯原版物品堆创建及零 NBT 污染架构。
📊 特性信息框
| 属性 | 技术规格 |
|---|---|
| 系统名称 | 分块式背包分发器 |
| 目标类 | net.minecraft.world.entity.item.ItemEntity |
| 背包上限 | 严格对齐原版规则（普通物品为 $64$，末影珍珠/鸡蛋为 $16$） |
| 数据纯净度 | $100%\text{ 纯原版物品堆}$（零自定义 NBT 或标签污染） |
| 拾取循环 | 分块循环 (Math.min(count, maxStack)) |
| 统计追踪 | 触发原版 Stats.ITEM_PICKED_UP.get(item) |
🎒 分块式循环拾取架构
在 Minecraft 26.1.2 中，Item Clumps 使用分块 while 循环将巨型聚合体分批注入玩家背包，自动拆解为原版规格堆叠（如每次 64 个）：
┌──────────────────────────────────────────────┐
│ Player Collides with Ground Clump (e.g. 500x)│
└──────────────────────┬───────────────────────┘
│
▼
┌──────────────────────────────────────────────┐
│ Pickup Validity & Target Check │
│ - pickupDelay == 0? │
│ - target == null || target == player? │
└──────────────────────┬───────────────────────┘
│ (Pass)
▼
┌──────────────────────────────────────────────┐
│ Iterative Chunked Loop │
│ toTake = Math.min(count, maxStackSize) │
│ player.getInventory().add(chunk) │
└──────────────────────┬───────────────────────┘
│
┌─────────────────┴─────────────────┐
│ │
Inventory Has Space Inventory Becomes Full
│ │
▼ ▼
┌─────────────────────────┐ ┌─────────────────────────┐
│ Entire Clump Absorbed │ │ Partial Pickup │
│ - 500 items transferred │ │ - Transferred what fits │
│ - Clump entity removed │ │ - Remaining items stay │
│ - Sound & particles play│ │ in ground clump │
└─────────────────────────┘ └─────────────────────────┘💻 真实源码实现参考
源自 Minecraft 26.1.2 的 ItemEntityMixin.java：
java
@Inject(method = "playerTouch", at = @At("HEAD"), cancellable = true)
private void item_clumps$smartPickup(Player player, CallbackInfo ci) {
if (!DynamicGameRuleManager.getBoolean(this.level(), ItemClumpsFabric.ENABLE_CLUMPING) ||
this.level().isClientSide()) return;
int count = this.getItem().getCount();
if (count <= 1) return; // Allow vanilla to handle normal 1-count items
ItemStack baseItem = this.getItem().copy();
baseItem.setCount(1); // Ensure base count is 1 for simulation
if (this.pickupDelay == 0 && (this.target == null || this.target.equals(player.getUUID()))) {
int originalCount = count;
int maxStack = baseItem.getMaxStackSize();
while (count > 0) {
int toTake = Math.min(count, maxStack);
ItemStack chunk = baseItem.copy();
chunk.setCount(toTake);
player.getInventory().add(chunk);
int added = toTake - chunk.getCount();
if (added > 0) {
count -= added;
player.take(this, added);
player.awardStat(net.minecraft.stats.Stats.ITEM_PICKED_UP.get(baseItem.getItem()), added);
}
if (!chunk.isEmpty()) {
// Player inventory is full
break;
}
}
if (count != originalCount) {
ItemStack stack = this.getItem();
stack.setCount(count);
this.setItem(stack);
if (count <= 0) {
player.onItemPickup((ItemEntity) (Object) this);
}
}
ci.cancel(); // Prevent vanilla pickup interference
}
}