Add GUI controls to seek/flee demo

Being toy demos, they should be easily tweakable and modifiable by the
user to get a feel for what the parameters of the behaviors do.

project/demos/seek_and_flee/Agents/Coward.tscn

@@ -1,13 +0,0 @@
-[gd_scene load_steps=3 format=2]
-
-[ext_resource path="res://demos/seek_and_flee/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 )

project/demos/seek_and_flee/Coward.gd

@@ -1,42 +0,0 @@
-extends KinematicBody2D
-"""
-AI agent that seeks to move away from the player's location as directly as possible.
-"""
-
-
-onready var radius: = ($CollisionShape2D.shape as CircleShape2D).radius
-
-onready var agent: = GSTSteeringAgent.new()
-onready var accel: = GSTTargetAcceleration.new()
-onready var flee: = GSTFlee.new(agent, player_agent)
-
-var player_agent: GSTAgentLocation
-var velocity: = Vector2.ZERO
-var speed: float
-var color: Color
-
-
-func _ready() -> void:
-	agent.max_linear_acceleration = speed/10
-	agent.max_linear_speed = speed
-
-
-func _draw() -> void:
-	draw_circle(Vector2.ZERO, radius, color)
-
-
-func _physics_process(delta: float) -> void:
-	if not player_agent:
-		return
-	
-	_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)

project/demos/seek_and_flee/GUI.gd

@@ -0,0 +1,28 @@
+extends MarginContainer
+
+
+enum BehaviorMode { SEEK, FLEE }
+
+signal mode_changed(behavior_mode)
+
+onready var seek: CheckBox = $BehaviorControls/Seek
+onready var flee: CheckBox = $BehaviorControls/Flee
+
+
+func _ready() -> void:
+	seek.connect("pressed", self, "_on_Seek_pressed")
+	flee.connect("pressed", self, "_on_Flee_pressed")
+
+
+func _on_Seek_pressed() -> void:
+	flee.pressed = false
+	flee.button_mask = BUTTON_MASK_LEFT
+	seek.button_mask = 0
+	emit_signal("mode_changed", BehaviorMode.SEEK)
+
+
+func _on_Flee_pressed() -> void:
+	seek.pressed = false
+	seek.button_mask = BUTTON_MASK_LEFT
+	flee.button_mask = 0
+	emit_signal("mode_changed", BehaviorMode.FLEE)

project/demos/seek_and_flee/GUI.tscn

@@ -0,0 +1,95 @@
+[gd_scene load_steps=2 format=2]
+
+[ext_resource path="res://demos/seek_and_flee/GUI.gd" type="Script" id=3]
+
+[node name="GUI" type="MarginContainer"]
+anchor_bottom = 1.0
+margin_right = 116.0
+custom_constants/margin_right = 20
+custom_constants/margin_top = 20
+custom_constants/margin_left = 20
+custom_constants/margin_bottom = 20
+script = ExtResource( 3 )
+__meta__ = {
+"_edit_use_anchors_": false
+}
+
+[node name="BehaviorControls" type="VBoxContainer" parent="."]
+margin_left = 20.0
+margin_top = 20.0
+margin_right = 102.0
+margin_bottom = 580.0
+
+[node name="Seek" type="CheckBox" parent="BehaviorControls"]
+margin_right = 82.0
+margin_bottom = 24.0
+focus_mode = 0
+pressed = true
+enabled_focus_mode = 0
+text = "Seek"
+
+[node name="Flee" type="CheckBox" parent="BehaviorControls"]
+margin_top = 28.0
+margin_right = 82.0
+margin_bottom = 52.0
+focus_mode = 0
+enabled_focus_mode = 0
+text = "Flee"
+
+[node name="Help" type="VBoxContainer" parent="BehaviorControls"]
+margin_top = 56.0
+margin_right = 82.0
+margin_bottom = 108.0
+
+[node name="Controls" type="Label" parent="BehaviorControls/Help"]
+margin_right = 82.0
+margin_bottom = 14.0
+text = "Controls"
+
+[node name="GridContainer" type="GridContainer" parent="BehaviorControls/Help"]
+margin_top = 18.0
+margin_right = 82.0
+margin_bottom = 52.0
+columns = 3
+
+[node name="Sep" type="Control" parent="BehaviorControls/Help/GridContainer"]
+margin_right = 15.0
+margin_bottom = 15.0
+rect_min_size = Vector2( 15, 15 )
+
+[node name="W" type="Label" parent="BehaviorControls/Help/GridContainer"]
+margin_left = 19.0
+margin_top = -1.0
+margin_right = 34.0
+margin_bottom = 14.0
+rect_min_size = Vector2( 15, 15 )
+text = "W"
+
+[node name="Sep2" type="Control" parent="BehaviorControls/Help/GridContainer"]
+margin_left = 38.0
+margin_right = 53.0
+margin_bottom = 15.0
+rect_min_size = Vector2( 15, 15 )
+
+[node name="A" type="Label" parent="BehaviorControls/Help/GridContainer"]
+margin_top = 18.0
+margin_right = 15.0
+margin_bottom = 33.0
+rect_min_size = Vector2( 15, 15 )
+text = "A"
+
+[node name="S" type="Label" parent="BehaviorControls/Help/GridContainer"]
+margin_left = 19.0
+margin_top = 18.0
+margin_right = 34.0
+margin_bottom = 33.0
+rect_min_size = Vector2( 15, 15 )
+text = "S"
+
+[node name="D" type="Label" parent="BehaviorControls/Help/GridContainer"]
+margin_left = 38.0
+margin_top = 18.0
+margin_right = 53.0
+margin_bottom = 33.0
+rect_min_size = Vector2( 15, 15 )
+text = "D"

project/demos/seek_and_flee/SeekFlee.tscn

@@ -3,9 +3,9 @@
 [ext_resource path="res://demos/seek_and_flee/Player.gd" type="Script" id=1]
 [ext_resource path="res://demos/seek_and_flee/Spawner.gd" type="Script" id=2]
 [ext_resource path="res://demos/seek_and_flee/SeekFleeDemo.gd" type="Script" id=3]
-[ext_resource path="res://demos/seek_and_flee/Agents/Seeker.tscn" type="PackedScene" id=4]
+[ext_resource path="res://demos/seek_and_flee/Seeker.tscn" type="PackedScene" id=4]
 [ext_resource path="res://demos/seek_and_flee/Boundary.gd" type="Script" id=5]
-[ext_resource path="res://demos/seek_and_flee/Agents/Coward.tscn" type="PackedScene" id=6]
+[ext_resource path="res://demos/seek_and_flee/GUI.tscn" type="PackedScene" id=7]
 
 [sub_resource type="CircleShape2D" id=1]
 radius = 30.0
@@ -22,6 +22,12 @@ __meta__ = {
 "_editor_description_": "A toy demo to demonstrate the usage for the Seek and Flee steering behaviors."
 }
 
+[node name="GUI" parent="." instance=ExtResource( 7 )]
+margin_left = -512.0
+margin_top = -300.0
+margin_right = -414.0
+margin_bottom = -208.0
+
 [node name="Camera2D" type="Camera2D" parent="."]
 current = true
 
@@ -68,13 +74,6 @@ script = ExtResource( 5 )
 [node name="CollisionShape2D" type="CollisionShape2D" parent="BottomBoundary"]
 shape = SubResource( 3 )
 
-[node name="Spawners" type="Node2D" parent="."]
-
-[node name="SeekerSpawner" type="Node2D" parent="Spawners"]
+[node name="Spawner" type="Node2D" parent="."]
 script = ExtResource( 2 )
 Entity = ExtResource( 4 )
-
-[node name="CowardSpawner" type="Node2D" parent="Spawners"]
-script = ExtResource( 2 )
-Entity = ExtResource( 6 )
-entity_color = Color( 0, 1, 0.741176, 1 )

project/demos/seek_and_flee/SeekFleeDemo.gd

@@ -3,8 +3,10 @@ extends Node2D
 Access helper class for children to access window boundaries.
 """
 
+
 onready var player: KinematicBody2D = $Player
-onready var spawners: Node2D = $Spawners
+onready var spawner: Node2D = $Spawner
+onready var _gui: = $GUI
 
 var camera_boundaries: Rect2
 
@@ -23,15 +25,15 @@ func _ready() -> void:
 	var rng: = RandomNumberGenerator.new()
 	rng.randomize()
 	
-	for spawner in spawners.get_children():
-		for i in range(spawner.entity_count):
-			var new_pos: = Vector2(
-					rng.randf_range(-camera_boundaries.size.x/2, camera_boundaries.size.x/2),
-					rng.randf_range(-camera_boundaries.size.y/2, camera_boundaries.size.y/2)
-			)
-			var entity: KinematicBody2D = spawner.Entity.instance()
-			entity.global_position = new_pos
-			entity.player_agent = player.agent
-			entity.speed = rng.randf_range(spawner.min_speed, spawner.max_speed)
-			entity.color = spawner.entity_color
-			spawner.add_child(entity)
+	for i in range(spawner.entity_count):
+		var new_pos: = Vector2(
+				rng.randf_range(-camera_boundaries.size.x/2, camera_boundaries.size.x/2),
+				rng.randf_range(-camera_boundaries.size.y/2, camera_boundaries.size.y/2)
+		)
+		var entity: KinematicBody2D = spawner.Entity.instance()
+		entity.global_position = new_pos
+		entity.player_agent = player.agent
+		entity.speed = rng.randf_range(spawner.min_speed, spawner.max_speed)
+		entity.color = spawner.entity_color
+		_gui.connect("mode_changed", entity, "_on_GUI_mode_changed")
+		spawner.add_child(entity)

project/demos/seek_and_flee/Seeker.gd

@@ -9,6 +9,8 @@ onready var radius: = ($CollisionShape2D.shape as CircleShape2D).radius
 onready var agent: = GSTSteeringAgent.new()
 onready var accel: = GSTTargetAcceleration.new()
 onready var seek: = GSTSeek.new(agent, player_agent)
+onready var flee: = GSTFlee.new(agent, player_agent)
+onready var _active_behavior: = seek
 
 var player_agent: GSTAgentLocation
 var velocity: = Vector2.ZERO
@@ -30,7 +32,7 @@ func _physics_process(delta: float) -> void:
 		return
 	
 	_update_agent()
-	accel = seek.calculate_steering(accel)
+	accel = _active_behavior.calculate_steering(accel)
 	
 	velocity = (velocity + Vector2(accel.linear.x, accel.linear.y)).clamped(agent.max_linear_speed)
 	velocity = move_and_slide(velocity)
@@ -40,3 +42,10 @@ func _physics_process(delta: float) -> void:
 
 func _update_agent() -> void:
 	agent.position = Vector3(global_position.x, global_position.y, 0)
+
+
+func _on_GUI_mode_changed(mode: int) -> void:
+	if mode == 0:
+		_active_behavior = seek
+	else:
+		_active_behavior = flee

project/demos/seek_and_flee/Seeker.tscn

@@ -2,6 +2,8 @@
 
 [ext_resource path="res://demos/seek_and_flee/Seeker.gd" type="Script" id=1]
 
+
+
 [sub_resource type="CircleShape2D" id=1]
 
 [node name="Seeker" type="KinematicBody2D"]