From f660aefa4c7942c9fa139963dbc14148d667ff15 Mon Sep 17 00:00:00 2001
From: MrKBear <mrkbear@qq.com>
Date: Fri, 6 May 2022 18:55:31 +0800
Subject: [PATCH] Add avoidance behavior

---
 source/Behavior/Avoidance.ts | 86 ++++++++++++++++++++++++++++++++++++
 source/Behavior/Behavior.ts  |  2 +
 2 files changed, 88 insertions(+)
 create mode 100644 source/Behavior/Avoidance.ts

diff --git a/source/Behavior/Avoidance.ts b/source/Behavior/Avoidance.ts
new file mode 100644
index 0000000..8982e88
--- /dev/null
+++ b/source/Behavior/Avoidance.ts
@@ -0,0 +1,86 @@
+import { Behavior } from "@Model/Behavior";
+import { Group } from "@Model/Group";
+import { Individual } from "@Model/Individual";
+import { Model } from "@Model/Model";
+
+type IAvoidanceBehaviorParameter = {
+    avoid: "CLG",
+	strength: "number",
+    range: "number"
+}
+
+type IAvoidanceBehaviorEvent = {}
+
+class Avoidance extends Behavior<IAvoidanceBehaviorParameter, IAvoidanceBehaviorEvent> {
+
+    public override behaviorId: string = "Avoidance";
+
+    public override behaviorName: string = "$Title";
+
+    public override iconName: string = "FastMode";
+
+    public override describe: string = "$Intro";
+
+    public override category: string = "$Interactive";
+
+    public override parameterOption = {
+        avoid: { name: "$Avoid", 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 currentDistant: number = Infinity;
+        let avoidTarget = undefined as Individual | undefined;
+
+        for (let i = 0; i < this.parameter.avoid.objects.length; i++) {
+            const targetGroup = this.parameter.avoid.objects[i];
+
+            targetGroup.individuals.forEach((targetIndividual) => {
+
+				// 排除自己
+				if (targetIndividual === individual) return;
+				let dis = targetIndividual.distanceTo(individual);
+
+				if (dis < currentDistant && dis <= this.parameter.range) {
+					avoidTarget = targetIndividual;
+					currentDistant = dis;
+				}
+			});
+        }
+
+        if (avoidTarget && currentDistant !== Infinity) {
+            individual.applyForce(
+				(individual.position[0] - avoidTarget.position[0]) * this.parameter.strength / currentDistant,
+				(individual.position[1] - avoidTarget.position[1]) * this.parameter.strength / currentDistant,
+				(individual.position[2] - avoidTarget.position[2]) * this.parameter.strength / currentDistant
+			);
+        }
+    }
+
+    public override terms: Record<string, Record<string, string>> = {
+        "$Title": {
+            "ZH_CN": "躲避",
+            "EN_US": "Avoidance"
+        },
+        "$Intro": {
+            "ZH_CN": "远离视野范围内最近的躲避目标",
+            "EN_US": "Stay away from the nearest evasive target in the field of vision"
+        },
+        "$Avoid": {
+            "ZH_CN": "躲避对象",
+            "EN_US": "Avoid object"
+        },
+        "$Strength": {
+            "ZH_CN": "躲避强度",
+            "EN_US": "Avoidance intensity"
+        },
+        "$Range": {
+            "ZH_CN": "视野范围",
+            "EN_US": "Field of vision"
+        }
+    };
+}
+
+export { Avoidance };
\ No newline at end of file
diff --git a/source/Behavior/Behavior.ts b/source/Behavior/Behavior.ts
index 40b72b5..2ce5ccc 100644
--- a/source/Behavior/Behavior.ts
+++ b/source/Behavior/Behavior.ts
@@ -7,6 +7,7 @@ import { Tracking } from "@Behavior/Tracking";
 import { ContactAttacking } from "@Behavior/ContactAttacking";
 import { ContactAssimilate } from "@Behavior/ContactAssimilate";
 import { DelayAssimilate } from "@Behavior/DelayAssimilate";
+import { Avoidance } from "@Behavior/Avoidance";
 
 const AllBehaviors: IAnyBehaviorRecorder[] = [
     new BehaviorRecorder(Template),
@@ -17,6 +18,7 @@ const AllBehaviors: IAnyBehaviorRecorder[] = [
     new BehaviorRecorder(ContactAttacking),
     new BehaviorRecorder(ContactAssimilate),
     new BehaviorRecorder(DelayAssimilate),
+    new BehaviorRecorder(Avoidance),
 ]
 
 /**