Create a toy demo for Seek and Flee behaviors

project.godot

@@ -83,6 +83,33 @@ _global_script_class_icons={
 config/name="godot-steering-toolkit"
 config/icon="res://icon.png"
 
+[input]
+
+sf_left={
+"deadzone": 0.5,
+"events": [ Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":0,"alt":false,"shift":false,"control":false,"meta":false,"command":false,"pressed":false,"scancode":65,"unicode":0,"echo":false,"script":null)
+, Object(InputEventJoypadMotion,"resource_local_to_scene":false,"resource_name":"","device":0,"axis":0,"axis_value":-1.0,"script":null)
+ ]
+}
+sf_right={
+"deadzone": 0.5,
+"events": [ Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":0,"alt":false,"shift":false,"control":false,"meta":false,"command":false,"pressed":false,"scancode":68,"unicode":0,"echo":false,"script":null)
+, Object(InputEventJoypadMotion,"resource_local_to_scene":false,"resource_name":"","device":0,"axis":0,"axis_value":1.0,"script":null)
+ ]
+}
+sf_up={
+"deadzone": 0.5,
+"events": [ Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":0,"alt":false,"shift":false,"control":false,"meta":false,"command":false,"pressed":false,"scancode":87,"unicode":0,"echo":false,"script":null)
+, Object(InputEventJoypadMotion,"resource_local_to_scene":false,"resource_name":"","device":0,"axis":1,"axis_value":-1.0,"script":null)
+ ]
+}
+sf_down={
+"deadzone": 0.5,
+"events": [ Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":0,"alt":false,"shift":false,"control":false,"meta":false,"command":false,"pressed":false,"scancode":83,"unicode":0,"echo":false,"script":null)
+, Object(InputEventJoypadMotion,"resource_local_to_scene":false,"resource_name":"","device":0,"axis":1,"axis_value":1.0,"script":null)
+ ]
+}
+
 [rendering]
 
 environment/default_environment="res://default_env.tres"

src/Steering/Demos/SeekFlee/Boundary.gd

@@ -0,0 +1,13 @@
+extends StaticBody2D
+
+
+var rect: Rect2
+
+
+func _ready() -> void:
+	var extents: = ($CollisionShape2D.shape as RectangleShape2D).extents
+	rect = Rect2(-extents, extents*2)
+
+
+func _draw() -> void:
+	draw_rect(rect, Color.yellowgreen)

src/Steering/Demos/SeekFlee/Coward.gd

@@ -0,0 +1,38 @@
+extends KinematicBody2D
+
+
+onready var radius: = ($CollisionShape2D.shape as CircleShape2D).radius
+
+var agent: SteeringAgent
+var player_agent: AgentLocation
+var flee: Flee
+var accel: = TargetAcceleration.new()
+var velocity: = Vector2.ZERO
+var speed: float
+var color: Color
+
+
+func _ready() -> void:
+	agent = SteeringAgent.new()
+	agent.max_linear_acceleration = speed/10
+	agent.max_linear_speed = speed
+	
+	flee = Flee.new(agent, player_agent)
+
+
+func _draw() -> void:
+	draw_circle(Vector2.ZERO, radius, color)
+
+
+func _physics_process(delta: float) -> void:
+	_update_agent()
+	accel = flee.calculate_steering(accel)
+	
+	velocity = (velocity + Vector2(accel.linear.x, accel.linear.y)).clamped(agent.max_linear_speed)
+	velocity = move_and_slide(velocity)
+	if velocity.length_squared() > 0:
+		update()
+
+
+func _update_agent() -> void:
+	agent.position = Vector3(global_position.x, global_position.y, 0)

src/Steering/Demos/SeekFlee/Coward.tscn

@@ -0,0 +1,13 @@
+[gd_scene load_steps=3 format=2]
+
+[ext_resource path="res://src/Steering/Demos/SeekFlee/Coward.gd" type="Script" id=1]
+
+[sub_resource type="CircleShape2D" id=1]
+
+[node name="Coward" type="KinematicBody2D"]
+collision_layer = 4
+collision_mask = 6
+script = ExtResource( 1 )
+
+[node name="CollisionShape2D" type="CollisionShape2D" parent="."]
+shape = SubResource( 1 )

src/Steering/Demos/SeekFlee/Player.gd

@@ -0,0 +1,26 @@
+extends KinematicBody2D
+
+
+onready var _radius: = ($CollisionShape2D.shape as CircleShape2D).radius
+
+export var speed: = 150.0
+
+var player_agent: = AgentLocation.new()
+
+
+func _draw() -> void:
+	draw_circle(Vector2.ZERO, _radius, Color.red)
+
+
+func _get_movement() -> Vector2:
+	return Vector2(Input.get_action_strength("sf_right") - Input.get_action_strength("sf_left"), 
+			Input.get_action_strength("sf_down") - Input.get_action_strength("sf_up"))
+
+
+func _physics_process(delta: float) -> void:
+	var movement: = _get_movement()
+	if movement.length_squared() < 0.01:
+		return
+	
+	move_and_slide(movement * speed)
+	player_agent.position = Vector3(global_position.x, global_position.y, 0)

src/Steering/Demos/SeekFlee/SeekFlee.tscn

@@ -0,0 +1,80 @@
+[gd_scene load_steps=10 format=2]
+
+[ext_resource path="res://src/Steering/Demos/SeekFlee/Player.gd" type="Script" id=1]
+[ext_resource path="res://src/Steering/Demos/SeekFlee/Spawner.gd" type="Script" id=2]
+[ext_resource path="res://src/Steering/Demos/SeekFlee/SeekFleeDemo.gd" type="Script" id=3]
+[ext_resource path="res://src/Steering/Demos/SeekFlee/Seeker.tscn" type="PackedScene" id=4]
+[ext_resource path="res://src/Steering/Demos/SeekFlee/Boundary.gd" type="Script" id=5]
+[ext_resource path="res://src/Steering/Demos/SeekFlee/Coward.tscn" type="PackedScene" id=6]
+
+[sub_resource type="CircleShape2D" id=1]
+radius = 30.0
+
+[sub_resource type="RectangleShape2D" id=2]
+extents = Vector2( 10, 300 )
+
+[sub_resource type="RectangleShape2D" id=3]
+extents = Vector2( 512, 10 )
+
+[node name="SeekFleeDemo" type="Node2D"]
+script = ExtResource( 3 )
+__meta__ = {
+"_editor_description_": "A toy demo to demonstrate the usage for the Seek and Flee steering behaviors."
+}
+
+[node name="Camera2D" type="Camera2D" parent="."]
+current = true
+
+[node name="Player" type="KinematicBody2D" parent="."]
+collision_mask = 2
+script = ExtResource( 1 )
+
+[node name="CollisionShape2D" type="CollisionShape2D" parent="Player"]
+shape = SubResource( 1 )
+
+[node name="LeftBoundary" type="StaticBody2D" parent="."]
+position = Vector2( -512, 0 )
+collision_layer = 2
+collision_mask = 5
+script = ExtResource( 5 )
+
+[node name="CollisionShape2D" type="CollisionShape2D" parent="LeftBoundary"]
+shape = SubResource( 2 )
+
+[node name="RightBoundary" type="StaticBody2D" parent="."]
+position = Vector2( 512, 0 )
+collision_layer = 2
+collision_mask = 5
+script = ExtResource( 5 )
+
+[node name="CollisionShape2D" type="CollisionShape2D" parent="RightBoundary"]
+shape = SubResource( 2 )
+
+[node name="TopBoundary" type="StaticBody2D" parent="."]
+position = Vector2( 0, -300 )
+collision_layer = 2
+collision_mask = 5
+script = ExtResource( 5 )
+
+[node name="CollisionShape2D" type="CollisionShape2D" parent="TopBoundary"]
+shape = SubResource( 3 )
+
+[node name="BottomBoundary" type="StaticBody2D" parent="."]
+position = Vector2( 0, 300 )
+collision_layer = 2
+collision_mask = 5
+script = ExtResource( 5 )
+
+[node name="CollisionShape2D" type="CollisionShape2D" parent="BottomBoundary"]
+shape = SubResource( 3 )
+
+[node name="SeekerSpawner" type="Node2D" parent="."]
+script = ExtResource( 2 )
+agent_scene = ExtResource( 4 )
+player = NodePath("../Player")
+
+[node name="FleeerSpawner" type="Node2D" parent="."]
+script = ExtResource( 2 )
+agent_scene = ExtResource( 6 )
+player = NodePath("../Player")
+agent_color = Color( 0.0980392, 0.886275, 0.517647, 1 )

src/Steering/Demos/SeekFlee/SeekFleeDemo.gd

@@ -0,0 +1,8 @@
+extends Node2D
+
+
+var camera_boundaries: Rect2
+
+
+func _init() -> void:
+	camera_boundaries = Rect2(Vector2.ZERO, Vector2(ProjectSettings["display/window/size/width"], ProjectSettings["display/window/size/height"]))

src/Steering/Demos/SeekFlee/Seeker.gd

@@ -0,0 +1,38 @@
+extends KinematicBody2D
+
+
+onready var radius: = ($CollisionShape2D.shape as CircleShape2D).radius
+
+var agent: SteeringAgent
+var player_agent: AgentLocation
+var seek: Seek
+var accel: = TargetAcceleration.new()
+var velocity: = Vector2.ZERO
+var speed: float
+var color: Color
+
+
+func _ready() -> void:
+	agent = SteeringAgent.new()
+	agent.max_linear_acceleration = speed/10
+	agent.max_linear_speed = speed
+	
+	seek = Seek.new(agent, player_agent)
+
+
+func _draw() -> void:
+	draw_circle(Vector2.ZERO, radius, color)
+
+
+func _physics_process(delta: float) -> void:
+	_update_agent()
+	accel = seek.calculate_steering(accel)
+	
+	velocity = (velocity + Vector2(accel.linear.x, accel.linear.y)).clamped(agent.max_linear_speed)
+	velocity = move_and_slide(velocity)
+	if velocity.length_squared() > 0:
+		update()
+
+
+func _update_agent() -> void:
+	agent.position = Vector3(global_position.x, global_position.y, 0)

src/Steering/Demos/SeekFlee/Seeker.tscn

@@ -0,0 +1,13 @@
+[gd_scene load_steps=3 format=2]
+
+[ext_resource path="res://src/Steering/Demos/SeekFlee/Seeker.gd" type="Script" id=1]
+
+[sub_resource type="CircleShape2D" id=1]
+
+[node name="Seeker" type="KinematicBody2D"]
+collision_layer = 4
+collision_mask = 6
+script = ExtResource( 1 )
+
+[node name="CollisionShape2D" type="CollisionShape2D" parent="."]
+shape = SubResource( 1 )

src/Steering/Demos/SeekFlee/Spawner.gd

@@ -0,0 +1,28 @@
+extends Node2D
+
+
+onready var player_agent: AgentLocation = get_node(player).player_agent
+
+
+export(PackedScene) var agent_scene: PackedScene
+export var agent_count: = 10
+export var player: = NodePath()
+export var min_speed: = 50.0
+export var max_speed: = 125.0
+export var agent_color: = Color.blue
+
+
+func _ready() -> void:
+	var boundaries: Rect2 = owner.camera_boundaries
+	randomize()
+	for i in range(agent_count):
+		var new_pos: = Vector2(
+			rand_range(-boundaries.size.x/2, boundaries.size.x/2), 
+			rand_range(-boundaries.size.y/2, boundaries.size.y/2)
+		)
+		var agent: = agent_scene.instance()
+		agent.global_position = new_pos
+		agent.player_agent = player_agent
+		agent.speed = rand_range(min_speed, max_speed)
+		agent.color = agent_color
+		add_child(agent)