chore: update pathfinding, add rpc/world-streaming docs, refactor world-streaming location (#376)

packages/framework/world-streaming/src/components/StreamingAnchorComponent.ts

@@ -0,0 +1,92 @@
+import { Component, ECSComponent, Serializable, Serialize, Property } from '@esengine/ecs-framework';
+import type { IPositionable } from '@esengine/spatial';
+import type { IVector2 } from '@esengine/ecs-framework-math';
+
+/**
+ * 流式锚点组件
+ *
+ * Marks an entity as a streaming anchor point.
+ * Chunks are loaded/unloaded based on distance to anchors.
+ *
+ * 标记实体作为流式加载锚点。通常挂载在玩家或摄像机实体上，
+ * 系统会根据锚点位置加载/卸载周围区块。
+ *
+ * 用户需要在每帧更新此组件的 x/y 位置。
+ * User must update the x/y position each frame.
+ */
+@ECSComponent('StreamingAnchor')
+@Serializable({ version: 1, typeId: 'StreamingAnchor' })
+export class StreamingAnchorComponent extends Component implements IPositionable {
+    /**
+     * 当前 X 位置
+     *
+     * Current X position in world units.
+     */
+    @Serialize()
+    @Property({ type: 'number', label: 'X' })
+    x: number = 0;
+
+    /**
+     * 当前 Y 位置
+     *
+     * Current Y position in world units.
+     */
+    @Serialize()
+    @Property({ type: 'number', label: 'Y' })
+    y: number = 0;
+
+    /**
+     * 获取位置 (IPositionable 接口)
+     *
+     * Get position (IPositionable interface).
+     */
+    get position(): IVector2 {
+        return { x: this.x, y: this.y };
+    }
+    /**
+     * 锚点权重
+     *
+     * Weight multiplier for this anchor's load radius.
+     * Higher values mean larger load radius around this anchor.
+     */
+    @Serialize()
+    @Property({ type: 'number', label: 'Weight', min: 0.1, max: 10 })
+    weight: number = 1.0;
+
+    /**
+     * 是否启用预加载
+     *
+     * Enable directional prefetching based on movement.
+     */
+    @Serialize()
+    @Property({ type: 'boolean', label: 'Enable Prefetch' })
+    bEnablePrefetch: boolean = true;
+
+    /**
+     * 上一帧位置 X
+     *
+     * Previous frame X position for velocity calculation.
+     */
+    previousX: number = 0;
+
+    /**
+     * 上一帧位置 Y
+     *
+     * Previous frame Y position for velocity calculation.
+     */
+    previousY: number = 0;
+
+    /**
+     * 速度 X 分量
+     *
+     * X component of velocity (units per second).
+     */
+    velocityX: number = 0;
+
+    /**
+     * 速度 Y 分量
+     *
+     * Y component of velocity (units per second).
+     */
+    velocityY: number = 0;
+}