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// blackboard is how the behavior tree sees/shares information
#[derive(Debug, Clone, PartialEq, Copy)]
pub enum BlackboardValue {
Integer(i64),
Float(f64),
// TODO we aren't going hogwild on these, we only need 32-bit resolution afaik
Point(Point2<f32>),
Vector(Vector2<f32>),
Boolean(bool),
// We want Copy, and strings are probably unneccessary
// String(Arc<str>),
// TODO If this ever librarifies, make this use mint
pub trait BlackboardValueVector {
fn vector(self) -> Vector2<f32>;
}
pub trait BlackboardValuePoint {
fn point(self) -> Point2<f32>;
}
impl<T: Into<Vector2<f32>>> BlackboardValueVector for T {
fn vector(self) -> Vector2<f32> {
self.into()
}
}
impl<T: Into<Point2<f32>>> BlackboardValuePoint for T {
fn point(self) -> Point2<f32> {
self.into()
}
}
impl BlackboardValue {
fn into_point<T: BlackboardValuePoint>(point: T) -> Self {
Self::Point(point.point())
}
fn into_vector<T: BlackboardValueVector>(vector: T) -> Self {
Self::Vector(vector.vector())
}
}
impl From<bool> for BlackboardValue {
fn from(value: bool) -> Self {
Self::Boolean(value)
}
}
macro_rules! bv_from {
(integer $type:ty) => {
impl From<$type> for BlackboardValue {
fn from(value: $type) -> Self {
Self::Integer(i64::from(value))
}
}
};
(float $type:ty) => {
impl From<$type> for BlackboardValue {
fn from(value: $type) -> Self {
Self::Float(f64::from(value))
}
}
};
}
bv_from!(integer u8);
bv_from!(integer u16);
bv_from!(integer u32);
bv_from!(integer i8);
bv_from!(integer i16);
bv_from!(integer i32);
bv_from!(float f32);
bv_from!(float f64);
#[derive(Debug, Default)]
pub struct Blackboard(HashMap<Box<str>, BlackboardValue>);
impl Blackboard {
pub fn set<S: AsRef<str>>(&mut self, key: S, value: BlackboardValue) {
self.0.insert(Box::from(key.as_ref()), value);
}
pub fn get<S: AsRef<str>>(&self, key: S) -> Option<&BlackboardValue> {
self.0.get(key.as_ref())
}
pub fn get_mut<S: AsRef<str>>(&mut self, key: S) -> Option<&mut BlackboardValue> {
self.0.get_mut(key.as_ref())
}
}
pub fn blackboard(&self) -> &Blackboard {
&self.blackboard
}
pub fn blackboard_mut(&mut self) -> &mut Blackboard {
&mut self.blackboard
}
fn tick_node(&mut self, node: &dyn BehaviorNode) -> Option<bool> {
match node.tick(&mut self.blackboard) {
fn tick_node(&mut self, node: &dyn BehaviorNode<B>, context: &mut B) -> Option<bool> {
match node.tick(context) {
impl BehaviorNode for Succeeder {
fn tick(&self, blackboard: &mut Blackboard) -> crate::simple_bt::NodeResult {
impl<B: 'static> BehaviorNode<B> for Succeeder<B> {
fn tick(&self, blackboard: &mut B) -> crate::simple_bt::NodeResult<B> {
impl BehaviorNode for MoveTo {
fn tick(&self, blackboard: &mut Blackboard) -> NodeResult {
let Some(BlackboardValue::Point(position)) = blackboard.get_mut("position") else {
return NodeResult::Failure;
};
let mut pos: Vec2 = (*position).into();
let movement = (self.goal - pos) * self.part.recip();
pos += movement;
// Store position back
*position = pos.into();
impl BehaviorNode<Vec2> for MoveTo {
fn tick(&self, position: &mut Vec2) -> NodeResult<Vec2> {
let movement = (self.goal - *position) * self.part.recip();
*position += movement;
// With no info, the node should fail
{
let mut runner = BehaviorRunner::new(tree.clone());
check!(!runner.is_running());
check!(runner.proceed() == Some(false));
}
runner
.blackboard_mut()
.set("position", BlackboardValue::into_point(starting_position));
while let Some(BlackboardValue::Point(pos)) = runner.blackboard().get("position") {
eprintln!("position = {pos:?}\nrunner = {runner:?}");
if let Some(res) = runner.proceed() {
// we should succeed
check!(res);
break;
}
let mut res = None;
while res.is_none() {
res = runner.proceed(&mut position);
#[derive(Debug)]
pub struct Repeated {
resume: Option<Arc<dyn BehaviorNode>>,
child: Arc<dyn BehaviorNode>,
pub struct Repeated<B> {
resume: Option<BehaviorArc<B>>,
child: BehaviorArc<B>,
}
impl<B> Debug for Repeated<B> {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
f.debug_struct("Repeated")
.field("child", &self.child)
.finish()
}
#[derive(Debug)]
pub struct RepeatedUntilFailure {
child: Arc<dyn BehaviorNode>,
pub struct RepeatedUntilFailure<B> {
child: BehaviorArc<B>,
}
impl<B> Debug for RepeatedUntilFailure<B> {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
f.debug_struct("RepeatedUntilFailure")
.field("child", &self.child)
.finish()
}
impl Inverter {
pub fn new(child: Arc<dyn BehaviorNode>) -> Self {
impl<B> std::fmt::Debug for Inverter<B> {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
f.debug_struct("Inverter")
.field("child", &self.child)
.finish()
}
}
impl<B> Inverter<B> {
pub fn new(child: BehaviorArc<B>) -> Self {
}
#[derive(Debug, Clone)]
struct MoveTo {
speed: f32,
goal: Vec2,
}
impl BehaviorNode<(Vec2, Vec2)> for MoveTo {
fn tick(&self, (position, velocity): &mut (Vec2, Vec2)) -> NodeResult<(Vec2, Vec2)> {
let dist = (self.goal - *position).length();
const ERROR: f32 = 10.0;
if dist <= ERROR {
NodeResult::Success
} else {
let desired_vel = (self.goal - *position).normalize_or_zero() * self.speed;
debug!("{desired_vel:?} {velocity:?}");
let dvn = desired_vel.normalize_or_zero();
let vn = velocity.normalize_or_zero();
let dvl = desired_vel.length();
let vl = velocity.length();
const KEEP: f32 = 0.9;
if dvn.dot(vn) <= 0.0 || vl < dvl {
*velocity *= KEEP;
*velocity += (desired_vel - *velocity) * (1.0 - KEEP);
}
NodeResult::Running(self.clone().arc())
}
}