ChunkTracker.java

net.minecraft.server.level.ChunkTracker

信息

• 全限定名：net.minecraft.server.level.ChunkTracker
• 类型：public abstract class
• 包：net.minecraft.server.level
• 源码路径：src/main/java/net/minecraft/server/level/ChunkTracker.java
• 起始行号：L6
• 继承：DynamicGraphMinFixedPoint
• 职责：

  TODO

字段/常量

• 无

内部类/嵌套类型

• 无

构造器

protected ChunkTracker(int levelCount, int minQueueSize, int minMapSize) @ L7

• 构造器名：ChunkTracker
• 源码定位：L7
• 修饰符：protected

参数:

• levelCount: int
• minQueueSize: int
• minMapSize: int

说明:

TODO

方法

下面的方法块按源码顺序生成。

protected boolean isSource(long node) @ L11

• 方法名：isSource
• 源码定位：L11
• 返回类型：boolean
• 修饰符：protected

参数:

• node: long

说明:

TODO

protected void checkNeighborsAfterUpdate(long node, int level, boolean onlyDecrease) @ L16

• 方法名：checkNeighborsAfterUpdate
• 源码定位：L16
• 返回类型：void
• 修饰符：protected

参数:

• node: long
• level: int
• onlyDecrease: boolean

说明:

TODO

protected int getComputedLevel(long node, long knownParent, int knownLevelFromParent) @ L34

• 方法名：getComputedLevel
• 源码定位：L34
• 返回类型：int
• 修饰符：protected

参数:

• node: long
• knownParent: long
• knownLevelFromParent: int

说明:

TODO

protected int computeLevelFromNeighbor(long from, long to, int fromLevel) @ L64

• 方法名：computeLevelFromNeighbor
• 源码定位：L64
• 返回类型：int
• 修饰符：protected

参数:

• from: long
• to: long
• fromLevel: int

说明:

TODO

protected abstract int getLevelFromSource(long to) @ L69

• 方法名：getLevelFromSource
• 源码定位：L69
• 返回类型：int
• 修饰符：protected abstract

参数:

• to: long

说明:

TODO

public void update(long node, int newLevelFrom, boolean onlyDecreased) @ L71

• 方法名：update
• 源码定位：L71
• 返回类型：void
• 修饰符：public

参数:

• node: long
• newLevelFrom: int
• onlyDecreased: boolean

说明:

TODO

代码

public abstract class ChunkTracker extends DynamicGraphMinFixedPoint {
    protected ChunkTracker(int levelCount, int minQueueSize, int minMapSize) {
        super(levelCount, minQueueSize, minMapSize);
    }
 
    @Override
    protected boolean isSource(long node) {
        return node == ChunkPos.INVALID_CHUNK_POS;
    }
 
    @Override
    protected void checkNeighborsAfterUpdate(long node, int level, boolean onlyDecrease) {
        if (!onlyDecrease || level < this.levelCount - 2) {
            ChunkPos pos = ChunkPos.unpack(node);
            int x = pos.x();
            int z = pos.z();
 
            for (int offsetX = -1; offsetX <= 1; offsetX++) {
                for (int offsetZ = -1; offsetZ <= 1; offsetZ++) {
                    long neighbor = ChunkPos.pack(x + offsetX, z + offsetZ);
                    if (neighbor != node) {
                        this.checkNeighbor(node, neighbor, level, onlyDecrease);
                    }
                }
            }
        }
    }
 
    @Override
    protected int getComputedLevel(long node, long knownParent, int knownLevelFromParent) {
        int computedLevel = knownLevelFromParent;
        ChunkPos pos = ChunkPos.unpack(node);
        int x = pos.x();
        int z = pos.z();
 
        for (int offsetX = -1; offsetX <= 1; offsetX++) {
            for (int offsetZ = -1; offsetZ <= 1; offsetZ++) {
                long neighbor = ChunkPos.pack(x + offsetX, z + offsetZ);
                if (neighbor == node) {
                    neighbor = ChunkPos.INVALID_CHUNK_POS;
                }
 
                if (neighbor != knownParent) {
                    int costFromNeighbor = this.computeLevelFromNeighbor(neighbor, node, this.getLevel(neighbor));
                    if (computedLevel > costFromNeighbor) {
                        computedLevel = costFromNeighbor;
                    }
 
                    if (computedLevel == 0) {
                        return computedLevel;
                    }
                }
            }
        }
 
        return computedLevel;
    }
 
    @Override
    protected int computeLevelFromNeighbor(long from, long to, int fromLevel) {
        return from == ChunkPos.INVALID_CHUNK_POS ? this.getLevelFromSource(to) : fromLevel + 1;
    }
 
    protected abstract int getLevelFromSource(long to);
 
    public void update(long node, int newLevelFrom, boolean onlyDecreased) {
        this.checkEdge(ChunkPos.INVALID_CHUNK_POS, node, newLevelFrom, onlyDecreased);
    }
}

引用的其他类

• ChunkPos

  • 引用位置: 方法调用
  • 关联成员: ChunkPos.pack(), ChunkPos.unpack()

• DynamicGraphMinFixedPoint

  • 引用位置: 继承