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use crate::Chunk;
use crate::{vec3, Block, Vec3d, Vec3i};
use hashbrown::HashMap;
use parking_lot::{RwLock, RwLockReadGuard, RwLockWriteGuard};
use rayon::iter::ParallelIterator;
use std::fmt;
use std::fmt::{Display, Formatter};
use std::ops::{Add, Sub};
use std::sync::Arc;
#[macro_export]
macro_rules! position {
($x:expr, $y:expr, $z:expr, $pitch:expr, $yaw:expr, $on_ground:expr) => {
$crate::Position {
x: $x,
y: $y,
z: $z,
pitch: $pitch,
yaw: $yaw,
on_ground: $on_ground,
}
};
($x:expr, $y:expr, $z:expr, $pitch: expr, $yaw: expr) => {
position!($x, $y, $z, $pitch, $yaw, true)
};
($x:expr, $y:expr, $z:expr) => {
position!($x, $y, $z, 0.0, 0.0)
};
($x:expr, $y:expr, $z:expr, $on_ground: expr) => {
position!($x, $y, $z, 0.0, 0.0, $on_ground)
};
}
#[derive(Clone, Copy, Debug, Default, PartialEq)]
pub struct Position {
pub x: f64,
pub y: f64,
pub z: f64,
pub pitch: f32,
pub yaw: f32,
pub on_ground: bool,
}
impl Position {
pub fn distance_to(&self, other: Position) -> f64 {
self.distance_squared_to(other).sqrt()
}
pub fn distance_squared_to(&self, other: Position) -> f64 {
square(self.x - other.x) + square(self.y - other.y) + square(self.z - other.z)
}
/// Returns a unit vector representing
/// the direction of this position's pitch
/// and yaw.
pub fn direction(&self) -> Vec3d {
let rotation_x = f64::from(self.yaw.to_radians());
let rotation_y = f64::from(self.pitch.to_radians());
let y = -rotation_y.sin();
let xz = rotation_y.cos();
let x = -xz * rotation_x.sin();
let z = xz * rotation_x.cos();
vec3(x, y, z)
}
pub fn chunk(self) -> ChunkPosition {
self.into()
}
pub fn block(self) -> BlockPosition {
self.into()
}
pub fn as_vec(&self) -> Vec3d {
(*self).into()
}
}
impl Add<Vec3d> for Position {
type Output = Position;
fn add(mut self, rhs: Vec3d) -> Self::Output {
self.x += rhs.x;
self.y += rhs.y;
self.z += rhs.z;
self
}
}
impl Add<glm::DVec3> for Position {
type Output = Position;
fn add(mut self, rhs: glm::DVec3) -> Self::Output {
self.x += rhs.x;
self.y += rhs.y;
self.z += rhs.z;
self
}
}
impl Add<Position> for Position {
type Output = Position;
fn add(mut self, rhs: Position) -> Self::Output {
self.x += rhs.x;
self.y += rhs.y;
self.z += rhs.z;
self.pitch += rhs.pitch;
self.yaw += rhs.yaw;
self
}
}
impl Sub<Vec3d> for Position {
type Output = Position;
fn sub(mut self, rhs: Vec3d) -> Self::Output {
self.x -= rhs.x;
self.y -= rhs.y;
self.z -= rhs.z;
self
}
}
impl Sub<glm::DVec3> for Position {
type Output = Position;
fn sub(mut self, rhs: glm::DVec3) -> Self::Output {
self.x -= rhs.x;
self.y -= rhs.y;
self.z -= rhs.z;
self
}
}
impl Sub<Position> for Position {
type Output = Position;
fn sub(mut self, rhs: Position) -> Self::Output {
self.x -= rhs.x;
self.y -= rhs.y;
self.z -= rhs.z;
self
}
}
impl Into<Vec3d> for Position {
fn into(self) -> Vec3d {
vec3(self.x, self.y, self.z)
}
}
impl Into<glm::DVec3> for Position {
fn into(self) -> glm::DVec3 {
glm::vec3(self.x, self.y, self.z)
}
}
impl From<Vec3d> for Position {
fn from(vec: Vec3d) -> Self {
position!(vec.x, vec.y, vec.z)
}
}
impl From<glm::DVec3> for Position {
fn from(vec: glm::DVec3) -> Self {
position!(vec.x, vec.y, vec.z)
}
}
impl Into<ChunkPosition> for Position {
fn into(self) -> ChunkPosition {
ChunkPosition {
x: self.x.floor() as i32 / 16,
z: self.z.floor() as i32 / 16,
}
}
}
impl Into<BlockPosition> for Position {
fn into(self) -> BlockPosition {
BlockPosition {
x: self.x.floor() as i32,
y: self.y.floor() as i32,
z: self.z.floor() as i32,
}
}
}
impl Display for Position {
fn fmt(&self, f: &mut Formatter) -> Result<(), fmt::Error> {
write!(f, "({:.2}, {:.2}, {:.2})", self.x, self.y, self.z,)
}
}
fn square(x: f64) -> f64 {
x * x
}
#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, Hash32, Default)]
pub struct ChunkPosition {
pub x: i32,
pub z: i32,
}
impl ChunkPosition {
pub const fn new(x: i32, z: i32) -> Self {
Self { x, z }
}
/// Computes the Manhattan distance from this chunk to another.
pub fn manhattan_distance_to(self, other: ChunkPosition) -> i32 {
(self.x - other.z).abs() + (self.z - other.z).abs()
}
}
impl Display for ChunkPosition {
fn fmt(&self, f: &mut Formatter) -> Result<(), fmt::Error> {
write!(f, "({}, {})", self.x, self.z)
}
}
impl Add<ChunkPosition> for ChunkPosition {
type Output = ChunkPosition;
fn add(self, rhs: ChunkPosition) -> Self::Output {
ChunkPosition {
x: self.x + rhs.x,
z: self.z + rhs.z,
}
}
}
#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, Hash32, Default)]
pub struct BlockPosition {
pub x: i32,
pub y: i32,
pub z: i32,
}
impl BlockPosition {
pub const fn new(x: i32, y: i32, z: i32) -> Self {
Self { x, y, z }
}
/// Returns the Manhattan distance from this position to another.
pub fn manhattan_distance(self, other: BlockPosition) -> i32 {
(self.x - other.x).abs() + (self.y - other.y).abs() + (self.z - other.z).abs()
}
/// Converts this `BlockPosition` to a `Position`.
pub fn position(self) -> Position {
self.into()
}
/// Converts into a `ChunkPosition`.
pub fn chunk(self) -> ChunkPosition {
self.into()
}
}
impl Add<BlockPosition> for BlockPosition {
type Output = BlockPosition;
fn add(mut self, rhs: BlockPosition) -> Self::Output {
self.x += rhs.x;
self.y += rhs.y;
self.z += rhs.z;
self
}
}
impl Add<Vec3i> for BlockPosition {
type Output = Self;
fn add(self, rhs: Vec3i) -> Self::Output {
self + BlockPosition::from(rhs)
}
}
impl Sub<BlockPosition> for BlockPosition {
type Output = Self;
fn sub(mut self, rhs: BlockPosition) -> Self::Output {
self.x -= rhs.x;
self.y -= rhs.y;
self.z -= rhs.z;
self
}
}
impl Sub<Vec3i> for BlockPosition {
type Output = Self;
fn sub(self, rhs: Vec3i) -> Self::Output {
self - BlockPosition::from(rhs)
}
}
impl Into<Vec3i> for BlockPosition {
fn into(self) -> Vec3i {
vec3(self.x, self.y, self.z)
}
}
impl From<Vec3i> for BlockPosition {
fn from(vec: Vec3i) -> Self {
BlockPosition {
x: vec.x,
y: vec.y,
z: vec.z,
}
}
}
impl Into<Position> for BlockPosition {
fn into(self) -> Position {
position!(self.x as f64, self.y as f64, self.z as f64)
}
}
impl Into<ChunkPosition> for BlockPosition {
fn into(self) -> ChunkPosition {
ChunkPosition {
x: self.x >> 4,
z: self.z >> 4,
}
}
}
pub type ChunkMapInner = HashMap<ChunkPosition, Arc<RwLock<Chunk>>>;
/// The chunk map.
///
/// This struct stores all the chunks on the server,
/// so it allows access to blocks and lighting data.
///
/// Chunks are internally wrapped in `Arc<RwLock>`,
/// allowing multiple systems to access different parts
/// of the world in parallel. Mutable access to this
/// type is only required for inserting and removing
/// chunks.
pub struct ChunkMap(pub ChunkMapInner);
impl ChunkMap {
/// Creates a new chunk map with no chunks.
pub fn new() -> Self {
Self(HashMap::new())
}
/// Retrieves a handle to the chunk at the given
/// position, or `None` if it is not loaded.
pub fn chunk_at(&self, pos: ChunkPosition) -> Option<RwLockReadGuard<Chunk>> {
self.0.get(&pos).map(|lock| lock.read())
}
/// Retrieves a handle to the chunk at the given
/// position, or `None` if it is not loaded.
pub fn chunk_at_mut(&self, pos: ChunkPosition) -> Option<RwLockWriteGuard<Chunk>> {
self.0.get(&pos).map(|lock| lock.write())
}
/// Returns an `Arc<RwLock<Chunk>>` at the given position.
pub fn chunk_handle_at(&self, pos: ChunkPosition) -> Option<Arc<RwLock<Chunk>>> {
self.0.get(&pos).map(Arc::clone)
}
/// Retrieves the block at the specified
/// location. If the chunk in which the block
/// exists is not laoded, `None` is returned.
pub fn block_at(&self, pos: BlockPosition) -> Option<Block> {
let (x, y, z) = chunk_relative_pos(pos);
self.chunk_at(pos.into())
.map(|chunk| chunk.block_at(x, y, z))
}
/// Sets the block at the given position.
///
/// Returns `true` if the block was set, or `false`
/// if its chunk was not loaded and thus no operation
/// was performed.
pub fn set_block_at(&self, pos: BlockPosition, block: Block) -> bool {
let (x, y, z) = chunk_relative_pos(pos);
self.chunk_at_mut(pos.into())
.map(|mut chunk| chunk.set_block_at(x, y, z, block))
.is_some()
}
/// Returns an iterator over chunks.
pub fn iter_chunks(&self) -> impl IntoIterator<Item = &Arc<RwLock<Chunk>>> {
self.0.values()
}
/// Returns a parallel iterator over chunks.
pub fn par_iter_chunks(&self) -> impl ParallelIterator<Item = &Arc<RwLock<Chunk>>> {
self.0.par_values()
}
/// Inserts a new chunk into the chunk map.
pub fn insert(&mut self, chunk: Chunk) {
self.0
.insert(chunk.position(), Arc::new(RwLock::new(chunk)));
}
/// Removes the chunk at the given position, returning `true` if it existed.
pub fn remove(&mut self, pos: ChunkPosition) -> bool {
self.0.remove(&pos).is_some()
}
}
impl Default for ChunkMap {
fn default() -> Self {
Self::new()
}
}
pub fn chunk_relative_pos(block_pos: BlockPosition) -> (usize, usize, usize) {
(
block_pos.x as usize & 0xf,
block_pos.y as usize,
block_pos.z as usize & 0xf,
)
}
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