built more assets and started playing with foliage painting

demo/src/Enemy.gd

@@ -0,0 +1,52 @@
+extends CharacterBody3D
+
+const RETARGET_COOLDOWN: float = 1.0
+
+@export var MOVE_SPEED: float = 50.0
+@export var target: Node3D
+
+@onready var nav_agent: NavigationAgent3D = $NavigationAgent3D
+
+var _retarget_timer: float = 1.0
+
+
+func _ready() -> void:
+	nav_agent.velocity_computed.connect(_on_velocity_computed)
+
+
+func _process(p_delta: float) -> void:
+	_retarget_timer += p_delta
+	if _retarget_timer > RETARGET_COOLDOWN and target:
+		# Don't reset the target position every frame. It triggers an A* search, which is expensive.
+		_retarget_timer = 0.0
+		nav_agent.set_target_position(target.global_position)
+
+
+func is_on_nav_mesh() -> bool:
+	var closest_point := NavigationServer3D.map_get_closest_point(nav_agent.get_navigation_map(), global_position)
+	return global_position.distance_squared_to(closest_point) < nav_agent.path_max_distance ** 2
+
+
+func _physics_process(p_delta: float) -> void:
+	if nav_agent.is_navigation_finished():
+		velocity.x = 0.0
+		velocity.z = 0.0
+	else:
+		var next_path_position: Vector3 = nav_agent.get_next_path_position()
+		var current_agent_position: Vector3 = global_position
+		var velocity_xz := (next_path_position - current_agent_position).normalized() * MOVE_SPEED
+		velocity.x = velocity_xz.x
+		velocity.z = velocity_xz.z
+	
+	velocity.y -= 40 * p_delta
+	
+	if nav_agent.avoidance_enabled:
+		nav_agent.set_velocity(velocity)
+	else:
+		_on_velocity_computed(velocity)
+
+
+func _on_velocity_computed(p_safe_velocity: Vector3) -> void:
+	velocity.x = p_safe_velocity.x
+	velocity.z = p_safe_velocity.z
+	move_and_slide()