proto3 initial commit

proto3/godot/ai/can_grab.gd

@@ -0,0 +1,26 @@
+extends BTCondition
+class_name BTCanGrab
+
+func tick(tick: Tick) -> int:
+	var npc = tick.actor
+	var bb = tick.blackboard
+	if !npc.is_in_group("guard"):
+		return FAILED
+	if npc.get_meta("action") == "forcing":
+		return FAILED
+	var enemy = bb.get("closest_enemy")
+	if !enemy:
+		return FAILED
+	var enemy_pos = enemy.global_transform.origin
+	var npc_pos = npc.global_transform.origin
+	var space_state = npc.get_world().direct_space_state
+	var result
+	var up = npc.orientation.basis[1] * 0.9
+	var dir = (enemy_pos - npc_pos).normalized() * 1.2
+	result = space_state.intersect_ray(npc_pos + up, npc_pos + dir + up,
+		[npc], 0xffff)
+	if result.has("collider"):
+		if result.collider == enemy:
+			return OK
+	return FAILED
+