Demo: Implement skirmisher AI
This commit is contained in:
parent
778ee80dda
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@ -1,17 +1,35 @@
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[gd_scene load_steps=3 format=3 uid="uid://co6yeafaljbq0"]
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[gd_scene load_steps=5 format=3 uid="uid://co6yeafaljbq0"]
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[ext_resource type="PackedScene" uid="uid://ooigbfhfy4wa" path="res://demo/agents/agent_base.tscn" id="1_2ir76"]
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[ext_resource type="Texture2D" uid="uid://l042ovqqsy3l" path="res://demo/assets/agent_skirmisher.png" id="2_w8tqw"]
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[ext_resource type="BehaviorTree" uid="uid://qqmjvbeibatn" path="res://demo/ai/trees/enemy_melee_skirmisher.tres" id="3_bhfkv"]
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[node name="Bobby" instance=ExtResource("1_2ir76")]
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[sub_resource type="BlackboardPlan" id="BlackboardPlan_vjbry"]
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var/speed/name = "speed"
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var/speed/type = 3
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var/speed/value = 400.0
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var/speed/hint = 1
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var/speed/hint_string = "10,1000,10"
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var/fast_speed/name = "fast_speed"
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var/fast_speed/type = 3
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var/fast_speed/value = 600.0
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var/fast_speed/hint = 1
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var/fast_speed/hint_string = "10,1000,10"
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var/slow_speed/name = "slow_speed"
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var/slow_speed/type = 3
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var/slow_speed/value = 300.0
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var/slow_speed/hint = 1
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var/slow_speed/hint_string = "10,1000,10"
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[node name="LegL" parent="Root/Rig" index="0"]
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[node name="AgentSkirmisher" instance=ExtResource("1_2ir76")]
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[node name="LegL" parent="Root/Rig" index="1"]
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texture = ExtResource("2_w8tqw")
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[node name="LegR" parent="Root/Rig" index="1"]
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[node name="LegR" parent="Root/Rig" index="2"]
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texture = ExtResource("2_w8tqw")
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[node name="Body" parent="Root/Rig" index="2"]
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[node name="Body" parent="Root/Rig" index="3"]
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texture = ExtResource("2_w8tqw")
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[node name="Hat" parent="Root/Rig/Body" index="0"]
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@ -22,3 +40,7 @@ texture = ExtResource("2_w8tqw")
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[node name="HandR" parent="Root/Rig/Body" index="2"]
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texture = ExtResource("2_w8tqw")
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[node name="BTPlayer" type="BTPlayer" parent="." index="4"]
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behavior_tree = ExtResource("3_bhfkv")
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blackboard_plan = SubResource("BlackboardPlan_vjbry")
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@ -12,8 +12,6 @@ collision_mask = 1
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script = ExtResource("2_24nyi")
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[node name="WeaponNinjaStar" parent="Root" index="2"]
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position = Vector2(-55, -76)
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rotation = 0.0
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scale = Vector2(0.999983, 0.999976)
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[node name="Hitbox" parent="Root" index="3"]
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@ -13,7 +13,7 @@ extends BTAction
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## Arrive to a position, with a bias to horizontal movement.
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@export var target_position_var := "target_position"
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@export var target_position_var := "pos"
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@export var speed_var := "speed"
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@export var tolerance := 50.0
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@ -0,0 +1,35 @@
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#*
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#* back_away.gd
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#* =============================================================================
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#* Copyright 2021-2024 Serhii Snitsaruk
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#*
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#* Use of this source code is governed by an MIT-style
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#* license that can be found in the LICENSE file or at
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#* https://opensource.org/licenses/MIT.
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#* =============================================================================
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#*
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@tool
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extends BTAction
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## BackAway
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## Returns RUNNING always.
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@export var speed_var: String = "speed"
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@export var max_angle_deviation: float = 0.7
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var _dir: Vector2
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var _desired_velocity: Vector2
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# Called each time this task is entered.
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func _enter() -> void:
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_dir = Vector2.LEFT * agent.get_facing()
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var speed: float = blackboard.get_var(speed_var, 200.0)
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var rand_angle = randf_range(-max_angle_deviation, max_angle_deviation)
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_desired_velocity = _dir.rotated(rand_angle) * speed
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# Called each time this task is ticked (aka executed).
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func _tick(_delta: float) -> Status:
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agent.velocity = lerp(agent.velocity, _desired_velocity, 0.2)
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agent.move_and_slide()
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agent.face_dir(-signf(_dir.x))
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return RUNNING
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@ -0,0 +1,49 @@
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#*
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#* in_range.gd
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#* =============================================================================
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#* Copyright 2021-2024 Serhii Snitsaruk
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#*
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#* Use of this source code is governed by an MIT-style
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#* license that can be found in the LICENSE file or at
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#* https://opensource.org/licenses/MIT.
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#* =============================================================================
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#*
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@tool
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extends BTCondition
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## InRange condition checks if the agent is within a range of target,
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## defined by distance_min and distance_max.
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## Returns SUCCESS if the agent is within the defined range;
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## otherwise, returns FAILURE.
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@export var distance_min: float
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@export var distance_max: float
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@export var target_var := "target"
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var _min_distance_squared: float
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var _max_distance_squared: float
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# Called to generate a display name for the task.
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func _generate_name() -> String:
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return "InRange (%d, %d) of %s" % [distance_min, distance_max,
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LimboUtility.decorate_var(target_var)]
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# Called to initialize the task.
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func _setup() -> void:
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_min_distance_squared = distance_min * distance_min
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_max_distance_squared = distance_max * distance_max
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# Called when the task is executed.
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func _tick(_delta: float) -> Status:
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var target: Node2D = blackboard.get_var(target_var, null)
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if not is_instance_valid(target):
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return FAILURE
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var dist_sq: float = agent.global_position.distance_squared_to(target.global_position)
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if dist_sq >= _min_distance_squared and dist_sq <= _max_distance_squared:
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return SUCCESS
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else:
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return FAILURE
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@ -13,12 +13,21 @@ extends BTAction
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## SelectFlankingPos on the side of a target, and return SUCCESS.
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## Returns FAILURE, if the target is not valid.
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enum AgentSide {
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CLOSEST,
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FARTHEST,
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BACK,
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FRONT,
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}
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## Blackboard variable that holds current target (should be a Node2D instance).
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@export var target_var: String = "target"
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## Should closest side be selected?
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@export var closest_side: bool = false
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@export var flank_side: AgentSide = AgentSide.CLOSEST
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## Minimum range relative to the target.
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@export var range_min: int = 300
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@export var range_max: int = 400
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## Blackboard variable that will be used to store selected position.
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@export var position_var: String = "flank_pos"
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@export var position_var: String = "pos"
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# Display a customized name (requires @tool).
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func _generate_name() -> String:
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return "SelectFlankingPos target: %s range: [%s, %s] closest: %s ➜%s" % [
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return "SelectFlankingPos target: %s range: [%s, %s] side: %s ➜%s" % [
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LimboUtility.decorate_var(target_var),
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range_min,
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range_max,
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closest_side,
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AgentSide.keys()[flank_side],
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LimboUtility.decorate_var(position_var)]
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# Called each time this task is ticked (aka executed).
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if not is_instance_valid(target):
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return FAILURE
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var dir: float = signf(target.global_position.x - agent.global_position.x)
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if closest_side:
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dir *= -1.0
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var dir: float
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match flank_side:
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AgentSide.FARTHEST:
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dir = signf(target.global_position.x - agent.global_position.x)
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AgentSide.CLOSEST:
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dir = -signf(target.global_position.x - agent.global_position.x)
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AgentSide.BACK:
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dir = -target.get_facing()
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AgentSide.FRONT:
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dir = target.get_facing()
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var flank_pos: Vector2 = target.global_position
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flank_pos.x += dir * randf_range(range_min, range_max)
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blackboard.set_var(position_var, flank_pos)
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return SUCCESS
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@ -39,6 +39,7 @@ children = [SubResource("BTPlayAnimation_qiw21"), SubResource("BTRandomWait_xlud
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script = ExtResource("2_ifiw3")
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target_var = "target"
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closest_side = true
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flank_side = 0
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range_min = 300
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range_max = 400
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position_var = "pos"
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@ -53,6 +53,7 @@ speed = 1.5
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script = ExtResource("2_fl3fr")
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target_var = "_target"
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closest_side = false
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flank_side = 1
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range_min = 400
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range_max = 600
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position_var = "_flank_pos"
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@ -70,7 +70,7 @@ resource_name = "AnimationPlayer"
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[sub_resource type="BTPlayAnimation" id="BTPlayAnimation_ppmxd"]
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await_completion = 2.0
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animation_player = SubResource("BBNode_s8evu")
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animation_name = &"attack_3"
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animation_name = &"attack_1"
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[sub_resource type="BTSequence" id="BTSequence_ww5v2"]
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custom_name = "Melee attack"
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@ -0,0 +1,156 @@
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[gd_resource type="BehaviorTree" load_steps=36 format=3 uid="uid://qqmjvbeibatn"]
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[ext_resource type="Script" path="res://demo/ai/tasks/get_first_in_group.gd" id="1_oiqfa"]
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[ext_resource type="Script" path="res://demo/ai/tasks/select_flanking_pos.gd" id="2_b4wcf"]
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[ext_resource type="Script" path="res://demo/ai/tasks/face_target.gd" id="3_hwbvn"]
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[ext_resource type="Script" path="res://demo/ai/tasks/arrive_pos.gd" id="3_pn7sq"]
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[ext_resource type="Script" path="res://demo/ai/tasks/in_range.gd" id="4_330a2"]
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[ext_resource type="Script" path="res://demo/ai/tasks/back_away.gd" id="5_morrs"]
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[sub_resource type="BlackboardPlan" id="BlackboardPlan_46tbn"]
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var/speed/name = "speed"
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var/speed/type = 3
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var/speed/value = 400.0
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var/speed/hint = 1
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var/speed/hint_string = "10,1000,10"
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var/fast_speed/name = "fast_speed"
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var/fast_speed/type = 3
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var/fast_speed/value = 600.0
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var/fast_speed/hint = 1
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var/fast_speed/hint_string = "10,1000,10"
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var/slow_speed/name = "slow_speed"
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var/slow_speed/type = 3
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var/slow_speed/value = 300.0
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var/slow_speed/hint = 1
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var/slow_speed/hint_string = "10,1000,10"
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[sub_resource type="BBNode" id="BBNode_nrd4b"]
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saved_value = NodePath("AnimationPlayer")
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resource_name = "AnimationPlayer"
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[sub_resource type="BTPlayAnimation" id="BTPlayAnimation_qiw21"]
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animation_player = SubResource("BBNode_nrd4b")
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animation_name = &"idle"
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blend = 0.1
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[sub_resource type="BTRandomWait" id="BTRandomWait_xlud8"]
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min_duration = 1.5
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max_duration = 3.0
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[sub_resource type="BTAction" id="BTAction_ulbrf"]
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script = ExtResource("1_oiqfa")
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group = &"player"
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output_var = "target"
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[sub_resource type="BTSequence" id="BTSequence_yhjh1"]
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custom_name = "Pause before action"
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children = [SubResource("BTPlayAnimation_qiw21"), SubResource("BTRandomWait_xlud8"), SubResource("BTAction_ulbrf")]
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[sub_resource type="BBNode" id="BBNode_wpj6d"]
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saved_value = NodePath("AnimationPlayer")
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resource_name = "AnimationPlayer"
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[sub_resource type="BTPlayAnimation" id="BTPlayAnimation_olf37"]
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animation_player = SubResource("BBNode_wpj6d")
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animation_name = &"walk"
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blend = 0.1
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speed = 1.2
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[sub_resource type="BTAction" id="BTAction_g5ayy"]
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script = ExtResource("2_b4wcf")
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target_var = "target"
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closest_side = false
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flank_side = 2
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range_min = 100
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range_max = 100
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position_var = "flank_pos"
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[sub_resource type="BTAction" id="BTAction_tv4lt"]
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script = ExtResource("3_pn7sq")
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target_position_var = "flank_pos"
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speed_var = "fast_speed"
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tolerance = 50.0
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[sub_resource type="BTSequence" id="BTSequence_rgwic"]
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children = [SubResource("BTAction_g5ayy"), SubResource("BTAction_tv4lt")]
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[sub_resource type="BTTimeLimit" id="BTTimeLimit_xek5v"]
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time_limit = 4.0
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children = [SubResource("BTSequence_rgwic")]
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[sub_resource type="BTAction" id="BTAction_kidxn"]
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script = ExtResource("3_hwbvn")
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target_var = "target"
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[sub_resource type="BTCondition" id="BTCondition_uk4dg"]
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script = ExtResource("4_330a2")
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distance_min = 50.0
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distance_max = 170.0
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target_var = "target"
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[sub_resource type="BTWait" id="BTWait_tadkc"]
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duration = 0.1
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[sub_resource type="BBNode" id="BBNode_s8evu"]
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saved_value = NodePath("AnimationPlayer")
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resource_name = "AnimationPlayer"
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[sub_resource type="BTPlayAnimation" id="BTPlayAnimation_ppmxd"]
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await_completion = 2.0
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animation_player = SubResource("BBNode_s8evu")
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animation_name = &"attack_3"
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[sub_resource type="BTSequence" id="BTSequence_ww5v2"]
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custom_name = "Melee attack"
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children = [SubResource("BTCondition_uk4dg"), SubResource("BTWait_tadkc"), SubResource("BTPlayAnimation_ppmxd")]
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[sub_resource type="BBNode" id="BBNode_wtnf2"]
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saved_value = NodePath("AnimationPlayer")
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resource_name = "AnimationPlayer"
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[sub_resource type="BTPlayAnimation" id="BTPlayAnimation_k86qc"]
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animation_player = SubResource("BBNode_wtnf2")
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animation_name = &"idle"
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blend = 0.1
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[sub_resource type="BTRandomWait" id="BTRandomWait_m447o"]
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min_duration = 0.3
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max_duration = 0.6
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[sub_resource type="BTSequence" id="BTSequence_b00uw"]
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custom_name = "Short break"
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children = [SubResource("BTPlayAnimation_k86qc"), SubResource("BTRandomWait_m447o")]
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[sub_resource type="BBNode" id="BBNode_3iqcf"]
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saved_value = NodePath("AnimationPlayer")
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resource_name = "AnimationPlayer"
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[sub_resource type="BTPlayAnimation" id="BTPlayAnimation_ee0ff"]
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animation_player = SubResource("BBNode_3iqcf")
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animation_name = &"walk"
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blend = 0.1
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speed = -0.7
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[sub_resource type="BTAction" id="BTAction_4ye2y"]
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script = ExtResource("5_morrs")
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speed_var = "slow_speed"
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max_angle_deviation = 0.7
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[sub_resource type="BTTimeLimit" id="BTTimeLimit_cns1i"]
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time_limit = 1.5
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children = [SubResource("BTAction_4ye2y")]
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[sub_resource type="BTSequence" id="BTSequence_y12eg"]
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custom_name = "Back away"
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children = [SubResource("BTPlayAnimation_ee0ff"), SubResource("BTTimeLimit_cns1i")]
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[sub_resource type="BTSequence" id="BTSequence_1xfnq"]
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custom_name = "Skirmish"
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children = [SubResource("BTPlayAnimation_olf37"), SubResource("BTTimeLimit_xek5v"), SubResource("BTAction_kidxn"), SubResource("BTSequence_ww5v2"), SubResource("BTSequence_b00uw"), SubResource("BTSequence_y12eg")]
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[sub_resource type="BTSequence" id="BTSequence_pxl2k"]
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children = [SubResource("BTSequence_yhjh1"), SubResource("BTSequence_1xfnq")]
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[resource]
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blackboard_plan = SubResource("BlackboardPlan_46tbn")
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root_task = SubResource("BTSequence_pxl2k")
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@ -75,6 +75,7 @@ children = [SubResource("BTSequence_0gdqn")]
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script = ExtResource("2_vbh52")
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target_var = "target"
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closest_side = true
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flank_side = 0
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range_min = 400
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range_max = 1000
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position_var = "shoot_pos"
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