From f9f5600b60d6944dc9a7dd502988703d59d0cd62 Mon Sep 17 00:00:00 2001
From: max-001 <maxsmits21@kpnmail.nl>
Date: Wed, 4 Dec 2024 13:46:41 +0100
Subject: Setup some behaviors

---
 src/crepe/api/AI.cpp          |  2 +-
 src/crepe/api/AI.h            | 47 +++++++++++++++++++++++++++++++++++++++----
 src/crepe/system/AISystem.cpp | 32 +++++++++++++++++++++++++++--
 src/crepe/system/AISystem.h   |  6 ++++++
 4 files changed, 80 insertions(+), 7 deletions(-)

(limited to 'src/crepe')

diff --git a/src/crepe/api/AI.cpp b/src/crepe/api/AI.cpp
index 6b63216..7f820a8 100644
--- a/src/crepe/api/AI.cpp
+++ b/src/crepe/api/AI.cpp
@@ -2,7 +2,7 @@
 
 namespace crepe {
 
-AI::AI(game_object_id_t id, double mass, double max_speed, double max_force)
+AI::AI(game_object_id_t id, float mass, float max_speed, float max_force)
 	: Component(id),
 	  mass(mass),
 	  max_speed(max_speed),
diff --git a/src/crepe/api/AI.h b/src/crepe/api/AI.h
index b755439..faeeba5 100644
--- a/src/crepe/api/AI.h
+++ b/src/crepe/api/AI.h
@@ -7,12 +7,51 @@ namespace crepe {
 
 class AI : public Component {
 public:
-	AI(game_object_id_t id, double mass, double max_speed, double max_force);
+	enum BehaviorType {
+		NONE = 0x00000,
+		SEEK = 0x00002,
+		FLEE = 0x00004,
+		ARRIVE = 0x00008,
+		PATH_FOLLOW = 0x00010,
+	};
 
 public:
-	double mass;
-	double max_speed;
-	double max_force;
+	AI(game_object_id_t id, float mass, float max_speed, float max_force);
+
+	bool on(BehaviorType behavior) const { return (flags & behavior) == behavior; }
+	void seek_on() { flags |= SEEK; }
+	void seek_off() {
+		if (on(SEEK)) flags ^= SEEK;
+	}
+	void flee_on() { flags |= FLEE; }
+	void flee_off() {
+		if (on(FLEE)) flags ^= FLEE;
+	}
+	void arrive_on() { flags |= ARRIVE; }
+	void arrive_off() {
+		if (on(ARRIVE)) flags ^= ARRIVE;
+	}
+	void path_follow_on() { flags |= PATH_FOLLOW; }
+	void path_follow_off() {
+		if (on(PATH_FOLLOW)) flags ^= PATH_FOLLOW;
+	}
+
+public:
+	float mass;
+	float max_speed;
+	float max_force;
+
+	// The target to seek or arrive at
+	vec2 seek_target;
+	// The target to flee from
+	vec2 flee_target;
+	// The distance at which the entity will start to flee from the target
+	float square_flee_panic_distance = 100.0f * 100.0f;
+	// The deceleration rate for the arrive behavior (higher values will make the entity decelerate faster (less overshoot))
+	float arrive_deceleration = 2.0f;
+
+private:
+	int flags = 0;
 };
 
 } // namespace crepe
diff --git a/src/crepe/system/AISystem.cpp b/src/crepe/system/AISystem.cpp
index 012f4fa..12da3d9 100644
--- a/src/crepe/system/AISystem.cpp
+++ b/src/crepe/system/AISystem.cpp
@@ -1,6 +1,34 @@
+#include "../ComponentManager.h"
+
 #include "AISystem.h"
-#include <iostream>
 
 using namespace crepe;
 
-void AISystem::update() { std::cout << "AI System update" << std::endl; }
+void AISystem::update() {
+	ComponentManager & mgr = this->component_manager;
+	RefVector<AI> ai_components = mgr.get_components_by_type<AI>();
+
+	for (AI & ai : ai_components) {
+		vec2 force = this->calculate(ai);
+		//...
+	}
+}
+
+vec2 AISystem::calculate(AI & ai) {
+	vec2 force;
+
+	if (ai.on(AI::BehaviorType::SEEK)) {
+		// Seek the target
+	}
+	if (ai.on(AI::BehaviorType::FLEE)) {
+		// Flee from the target
+	}
+	if (ai.on(AI::BehaviorType::ARRIVE)) {
+		// Arrive at the target
+	}
+	if (ai.on(AI::BehaviorType::PATH_FOLLOW)) {
+		// Follow the path
+	}
+
+	return force;
+}
diff --git a/src/crepe/system/AISystem.h b/src/crepe/system/AISystem.h
index 4138e01..eb8d08c 100644
--- a/src/crepe/system/AISystem.h
+++ b/src/crepe/system/AISystem.h
@@ -1,6 +1,9 @@
 #pragma once
 
+#include "api/AI.h"
+
 #include "System.h"
+#include "types.h"
 
 namespace crepe {
 
@@ -9,6 +12,9 @@ public:
 	using System::System;
 
 	void update() override;
+
+private:
+	vec2 calculate(AI & ai);
 };
 
 } // namespace crepe
-- 
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