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Copy pathentity.rs
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347 lines (311 loc) · 9.45 KB
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use arrayvec::ArrayVec;
use libcraft_items::{Item, ItemStack, ItemStackBuilder};
use serde::ser::Error;
use serde::{Deserialize, Serialize, Serializer};
use thiserror::Error;
use crate::{vec3, Position, Vec3d};
#[derive(Copy, Clone, Debug, PartialEq, Eq, Hash)]
pub enum EntityDataKind {
Item,
Arrow,
Cow,
Pig,
Chicken,
Sheep,
Horse,
Llama,
Mooshroom,
Rabbit,
Squid,
Donkey,
Unknown,
}
impl<'a> From<&'a EntityData> for EntityDataKind {
fn from(data: &'a EntityData) -> Self {
match data {
EntityData::Arrow(_) => EntityDataKind::Arrow,
EntityData::Item(_) => EntityDataKind::Item,
EntityData::Cow(_) => EntityDataKind::Cow,
EntityData::Pig(_) => EntityDataKind::Pig,
EntityData::Chicken(_) => EntityDataKind::Chicken,
EntityData::Sheep(_) => EntityDataKind::Sheep,
EntityData::Horse(_) => EntityDataKind::Horse,
EntityData::Llama(_) => EntityDataKind::Llama,
EntityData::Mooshroom(_) => EntityDataKind::Mooshroom,
EntityData::Rabbit(_) => EntityDataKind::Rabbit,
EntityData::Squid(_) => EntityDataKind::Squid,
EntityData::Donkey(_) => EntityDataKind::Donkey,
EntityData::Unknown => EntityDataKind::Unknown,
}
}
}
#[derive(Debug, Clone, Serialize, Deserialize)]
#[serde(tag = "id")]
pub enum EntityData {
#[serde(rename = "minecraft:item")]
Item(ItemEntityData),
#[serde(rename = "minecraft:arrow")]
Arrow(ArrowEntityData),
#[serde(rename = "minecraft:cow")]
Cow(AnimalData),
#[serde(rename = "minecraft:pig")]
Pig(AnimalData),
#[serde(rename = "minecraft:chicken")]
Chicken(AnimalData),
#[serde(rename = "minecraft:sheep")]
Sheep(AnimalData),
#[serde(rename = "minecraft:horse")]
Horse(AnimalData),
#[serde(rename = "minecraft:llama")]
Llama(AnimalData),
#[serde(rename = "minecraft:mooshroom")]
Mooshroom(AnimalData),
#[serde(rename = "minecraft:rabbit}")]
Rabbit(AnimalData),
#[serde(rename = "minecraft:squid")]
Squid(AnimalData),
#[serde(rename = "minecraft:donkey")]
Donkey(AnimalData),
/// Fallback type for unknown entities
#[serde(other, serialize_with = "EntityData::serialize_unknown")]
Unknown,
}
impl EntityData {
pub(crate) fn serialize_unknown<S: Serializer>(_serializer: S) -> Result<S::Ok, S::Error> {
Err(S::Error::custom("cannot serialize unknown entities"))
}
}
/// Common entity tags.
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct BaseEntityData {
#[serde(rename = "Pos")]
pub position: ArrayVec<f64, 3>,
#[serde(rename = "Rotation")]
pub rotation: ArrayVec<f32, 2>,
#[serde(rename = "Motion")]
pub velocity: ArrayVec<f64, 3>,
}
#[derive(Error, Debug, PartialEq, Eq)]
pub enum EntityLoadError {
#[error("missing position/rotation/velocity data")]
MissingData,
}
impl BaseEntityData {
/// Creates a `BaseEntityData` from its parameters.
pub fn new(pos: Position, velocity: Vec3d) -> Self {
Self {
position: [pos.x, pos.y, pos.z].into(),
rotation: [pos.yaw, pos.pitch].into(),
velocity: [velocity.x, velocity.y, velocity.z].into(),
}
}
/// Reads the position and rotation fields. If the fields are invalid, an error is returned.
pub fn read_position(self: &BaseEntityData) -> Result<Position, EntityLoadError> {
if self.position.len() == 3 && self.rotation.len() == 2 {
Ok(Position {
x: self.position[0],
y: self.position[1],
z: self.position[2],
yaw: self.rotation[0],
pitch: self.rotation[1],
})
} else {
Err(EntityLoadError::MissingData)
}
}
/// Reads the velocity field. If the field is invalid, an error is returned.
pub fn read_velocity(self: &BaseEntityData) -> Result<Vec3d, EntityLoadError> {
if self.velocity.len() == 3 {
Ok(vec3(self.velocity[0], self.velocity[1], self.velocity[2]))
} else {
Err(EntityLoadError::MissingData)
}
}
}
impl Default for BaseEntityData {
fn default() -> Self {
BaseEntityData {
position: [0.0, 0.0, 0.0].into(),
rotation: [0.0, 0.0].into(),
velocity: [0.0, 0.0, 0.0].into(),
}
}
}
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct AnimalData {
#[serde(flatten)]
pub base: BaseEntityData,
#[serde(rename = "Health")]
pub health: f32,
}
impl AnimalData {
/// Creates an `AnimalData` from its parameters.
pub fn new(base: BaseEntityData, health: f32) -> Self {
Self { base, health }
}
}
impl Default for AnimalData {
fn default() -> Self {
AnimalData {
base: Default::default(),
health: 20.0,
}
}
}
/// Represents a single item, without slot information.
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct ItemData {
#[serde(rename = "Count")]
pub count: i8,
#[serde(rename = "id")]
pub item: String,
#[serde(rename = "tag")]
pub nbt: Option<ItemNbt>,
}
impl Default for ItemData {
fn default() -> Self {
Self {
count: 0,
item: Item::Air.name().to_owned(),
nbt: None,
}
}
}
impl From<ItemData> for ItemStack {
fn from(item: ItemData) -> Self {
ItemStack::from(&item)
}
}
// Can't do proper Borrow trait impl because of orphan rule
impl From<&ItemData> for ItemStack {
fn from(item: &ItemData) -> Self {
ItemNbt::item_stack(
&item.nbt,
Item::from_name(item.item.as_str()).unwrap_or(Item::Air),
item.count as u8,
)
}
}
impl<S> From<S> for ItemData
where
S: std::borrow::Borrow<ItemStack>,
{
fn from(s: S) -> Self {
let stack = s.borrow();
let nbt = stack.into();
let nbt = if nbt == Default::default() {
None
} else {
Some(nbt)
};
Self {
count: stack.count() as i8,
item: stack.item().name().to_owned(),
nbt,
}
}
}
/// Represents NBT tags on an item.
#[derive(Default, Debug, Clone, Serialize, Deserialize, PartialEq, Eq)]
pub struct ItemNbt {
#[serde(rename = "Damage")]
pub damage: Option<i32>,
// TODO enchantments, display name, ...
}
impl ItemNbt {
/// Create an `ItemStack` of the specified item and amount, setting any NBT present.
///
/// # Panics
/// Panics if `count` is zero.
pub fn item_stack(nbt: &Option<Self>, item: Item, count: u8) -> ItemStack {
match nbt {
Some(ItemNbt {
damage: Some(damage),
}) => ItemStackBuilder::with_item(item)
.count(count as u32)
.damage(*damage)
.into(),
Some(ItemNbt { damage: None }) | None => {
ItemStackBuilder::with_item(item).count(count as u32).into()
}
}
}
}
impl<S> From<S> for ItemNbt
where
S: std::borrow::Borrow<ItemStack>,
{
fn from(s: S) -> Self {
let stack = s.borrow();
Self {
damage: stack.damage_taken().map(|d| d as i32),
}
}
}
/// Data for an Item entity (`minecraft:item`).
#[derive(Clone, Default, Serialize, Deserialize, Debug)]
pub struct ItemEntityData {
// Inherit base entity data
#[serde(flatten)]
pub entity: BaseEntityData,
// Item-specific tags
#[serde(rename = "Age")]
pub age: i16,
#[serde(rename = "PickupDelay")]
pub pickup_delay: i16,
#[serde(rename = "Item")]
pub item: ItemData,
#[serde(rename = "Health")]
pub health: i16,
}
/// Data for an Arrow entity (`minecraft:arrow`).
#[derive(Debug, Default, Clone, Serialize, Deserialize)]
pub struct ArrowEntityData {
// Inherit base entity data
#[serde(flatten)]
pub entity: BaseEntityData,
// Arrow-specific tags
// TODO: Change this field to `bool` when issue with hematite_nbt is resolved.
// See: https://github.com/PistonDevelopers/hematite_nbt/issues/43
#[serde(rename = "crit")]
pub critical: i8,
}
#[cfg(test)]
mod tests {
use super::*;
use crate::position;
#[test]
fn test_read_position() {
let data = BaseEntityData {
position: [1.0, 2.0, 3.0].into(),
rotation: [4.0, 5.0].into(),
velocity: [6.0, 7.0, 8.0].into(),
};
let pos = data.read_position().unwrap();
assert!(pos.x - 1.0 < std::f64::EPSILON);
assert!(pos.y - 2.0 < std::f64::EPSILON);
assert!(pos.z - 3.0 < std::f64::EPSILON);
assert!(pos.yaw - 4.0 < std::f32::EPSILON);
assert!(pos.pitch - 5.0 < std::f32::EPSILON);
}
#[test]
fn test_read_velocity() {
let data = BaseEntityData {
position: [1.0, 2.0, 3.0].into(),
rotation: [4.0, 5.0].into(),
velocity: [6.0, 7.0, 8.0].into(),
};
let vel = data.read_velocity().unwrap();
assert!(vel[0] - 6.0 < std::f64::EPSILON);
assert!(vel[1] - 7.0 < std::f64::EPSILON);
assert!(vel[2] - 8.0 < std::f64::EPSILON);
}
#[test]
fn test_new() {
let pos = position!(1.0, 10.0, 3.0, 115.0, -3.0);
let vel = vec3(0.0, 1.0, 2.0);
let data = BaseEntityData::new(pos, vel);
assert_eq!(data.read_position(), Ok(pos));
assert_eq!(data.read_velocity(), Ok(vel));
}
}
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