Add individuals metadata

source/Model/Group.ts

@@ -15,11 +15,17 @@ class Group {
 	 * 创建个体
      * @param count 创建数量
 	 */
-	public new(count: number = 1): this {
+	public new(count: number = 1): Individual {
+        let newIndividual: Individual | undefined;
 		for (let i = 0; i < count; i++) {
-			this.individuals.add(new Individual(this));
+            newIndividual = new Individual(this);
+			this.individuals.add(newIndividual);
 		}
-        return this;
+        if (newIndividual) {
+            return newIndividual;
+        } else {
+            return new Individual(this);
+        }
 	}
 
     /**
@@ -101,7 +107,7 @@ class Group {
 	}
 
 	/**
-     * 运行效果器
+     * 执行行为影响
 	 * @param
      */
 	public runner(t: number): void {

source/Model/Individual.ts

@@ -1,4 +1,5 @@
 import type { Group } from "./Group";
+import { ObjectID } from "./Renderer";
 
 /**
  * 群中的个体类型
@@ -108,6 +109,26 @@ class Individual {
     public distanceTo(position: Individual | number[]): number {
         return Individual.vectorLength(this.vectorTo(position));
     }
+
+    /**
+     * 保存提供给 Behavior 使用的数据
+     */
+    private metaData: Map<ObjectID, any> = new Map();
+
+    /**
+     * 获取元数据
+     */
+    public getData<T = any>(key: ObjectID): T {
+        return this.metaData.get(key);
+    }
+
+    /**
+     * 设置元数据
+     */
+    public setData<T = any>(key: ObjectID, value: T): T {
+        this.metaData.set(key, value);
+        return value;
+    }
 }
 
 export default Individual;