Add central cluster behavior

source/Behavior/Behavior.ts

@@ -9,6 +9,7 @@ import { ContactAssimilate } from "@Behavior/ContactAssimilate";
 import { DelayAssimilate } from "@Behavior/DelayAssimilate";
 import { Avoidance } from "@Behavior/Avoidance";
 import { DirectionCluster } from "@Behavior/DirectionCluster";
+import { CentralCluster } from "@Behavior/CentralCluster";
 
 const AllBehaviors: IAnyBehaviorRecorder[] = [
     new BehaviorRecorder(Template),
@@ -21,6 +22,7 @@ const AllBehaviors: IAnyBehaviorRecorder[] = [
     new BehaviorRecorder(DelayAssimilate),
     new BehaviorRecorder(Avoidance),
     new BehaviorRecorder(DirectionCluster),
+    new BehaviorRecorder(CentralCluster),
 ]
 
 /**

source/Behavior/CentralCluster.ts

@@ -0,0 +1,96 @@
+import { Behavior } from "@Model/Behavior";
+import { Group } from "@Model/Group";
+import { Individual } from "@Model/Individual";
+import { Model } from "@Model/Model";
+
+type ICentralClusterBehaviorParameter = {
+    cluster: "CLG",
+	strength: "number",
+    range: "number"
+}
+
+type ICentralClusterBehaviorEvent = {}
+
+class CentralCluster extends Behavior<ICentralClusterBehaviorParameter, ICentralClusterBehaviorEvent> {
+
+    public override behaviorId: string = "CentralCluster";
+
+    public override behaviorName: string = "$Title";
+
+    public override iconName: string = "ZoomToFit";
+
+    public override describe: string = "$Intro";
+
+    public override category: string = "$Interactive";
+
+    public override parameterOption = {
+        cluster: { name: "$Cluster", type: "CLG" },
+        strength: { type: "number", name: "$Strength", defaultValue: 1, numberMin: 0, numberStep: .1 },
+        range: { type: "number", name: "$Range", defaultValue: 4, numberMin: 0, numberStep: .1 }
+    };
+
+    public effect = (individual: Individual, group: Group, model: Model, t: number): void => {
+        
+        let findCount = 0;
+        let centerPos: number[] = [0, 0, 0];
+
+        for (let i = 0; i < this.parameter.cluster.objects.length; i++) {
+            const targetGroup = this.parameter.cluster.objects[i];
+
+            targetGroup.individuals.forEach((targetIndividual) => {
+
+				// 排除自己
+				if (targetIndividual === individual) return;
+				let dis = targetIndividual.distanceTo(individual);
+
+				if (dis <= this.parameter.range) {
+                    centerPos[0] += targetIndividual.position[0];
+                    centerPos[1] += targetIndividual.position[1];
+                    centerPos[2] += targetIndividual.position[2];
+					findCount ++;
+				}
+			});
+        }
+
+        if (findCount > 0) {
+
+            let dirX = centerPos[0] / findCount - individual.position[0];
+            let dirY = centerPos[1] / findCount - individual.position[1];
+            let dirZ = centerPos[2] / findCount - individual.position[2];
+            let length = individual.vectorLength(dirX, dirY, dirZ);
+
+            if (length > 0) {
+                individual.applyForce(
+                    dirX * this.parameter.strength / length,
+                    dirY * this.parameter.strength / length,
+                    dirZ * this.parameter.strength / length
+                );
+            }
+        }
+    }
+
+    public override terms: Record<string, Record<string, string>> = {
+        "$Title": {
+            "ZH_CN": "中心结群",
+            "EN_US": "Central cluster"
+        },
+        "$Intro": {
+            "ZH_CN": "个体将按照视野范围内目标方向结群对象个体的几何中心移动",
+            "EN_US": "The individual will move according to the geometric center of the grouped object individual in the target direction within the field of view"
+        },
+        "$Cluster": {
+            "ZH_CN": "中心结群对象",
+            "EN_US": "Central clustering object"
+        },
+        "$Strength": {
+            "ZH_CN": "结群强度",
+            "EN_US": "Clustering strength"
+        },
+        "$Range": {
+            "ZH_CN": "视野范围",
+            "EN_US": "Field of vision"
+        }
+    };
+}
+
+export { CentralCluster };