fyrox_impl/utils/behavior/
leaf.rs

1// Copyright (c) 2019-present Dmitry Stepanov and Fyrox Engine contributors.
2//
3// Permission is hereby granted, free of charge, to any person obtaining a copy
4// of this software and associated documentation files (the "Software"), to deal
5// in the Software without restriction, including without limitation the rights
6// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
7// copies of the Software, and to permit persons to whom the Software is
8// furnished to do so, subject to the following conditions:
9//
10// The above copyright notice and this permission notice shall be included in all
11// copies or substantial portions of the Software.
12//
13// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
14// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
15// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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19// SOFTWARE.
20
21//! Leaf is a "final" node of a behavior tree. It contains user-defined action which
22//! is able to mutate given context.
23
24use crate::utils::behavior::BaseBehavior;
25use crate::{
26    core::{pool::Handle, visitor::prelude::*},
27    utils::behavior::{BehaviorNode, BehaviorTree},
28};
29use std::cell::RefCell;
30
31/// See module docs.
32#[derive(Debug, PartialEq, Visit, Eq, Clone)]
33pub struct LeafNode<B>
34where
35    B: BaseBehavior,
36{
37    /// User-defined behavior.
38    pub behavior: Option<RefCell<B>>,
39}
40
41impl<B> Default for LeafNode<B>
42where
43    B: BaseBehavior,
44{
45    fn default() -> Self {
46        Self { behavior: None }
47    }
48}
49
50impl<B> LeafNode<B>
51where
52    B: BaseBehavior,
53{
54    /// Creates new leaf node with given action.
55    pub fn new(behavior: B) -> Self {
56        Self {
57            behavior: Some(RefCell::new(behavior)),
58        }
59    }
60
61    /// Adds self to given behavior tree and returns handle to self.
62    pub fn add_to(self, tree: &mut BehaviorTree<B>) -> Handle<BehaviorNode<B>> {
63        tree.add_node(BehaviorNode::Leaf(self))
64    }
65}
fyrox_impl/utils/behavior/leaf.rs

fyrox_impl/utils/behavior/
leaf.rs
