use anyhow::Ok;
use anyhow::Result;
use std::cell::RefCell;
use std::rc::Rc;
use crate::primitives::cube::Cube;
extern crate rand;
pub const CHUNK_SIZE_EXPONENT: u32 = 6;
pub const CHUNK_SIZE: usize = (2 as usize).pow(CHUNK_SIZE_EXPONENT);
pub const MAX_TREE_DEPTH: usize = CHUNK_SIZE_EXPONENT as usize - 2;
pub const MIN_CHUNK_SIZE: usize = CHUNK_SIZE / (2 as usize).pow(MAX_TREE_DEPTH as u32);
#[derive(Clone, Debug)]
#[allow(non_snake_case)]
pub struct OctTree<T> {
pub child_XYZ: Option<Rc<RefCell<Self>>>,
pub child_xYZ: Option<Rc<RefCell<Self>>>,
pub child_xyZ: Option<Rc<RefCell<Self>>>,
pub child_XyZ: Option<Rc<RefCell<Self>>>,
pub child_XYz: Option<Rc<RefCell<Self>>>,
pub child_xYz: Option<Rc<RefCell<Self>>>,
pub child_xyz: Option<Rc<RefCell<Self>>>,
pub child_Xyz: Option<Rc<RefCell<Self>>>,
pub blocks: Vec<Option<T>>,
pub size: usize,
pub scale: f32,
}
#[warn(non_snake_case)]
impl OctTree<Cube> {
pub fn set_cube(&mut self, cube: Cube) {
let x = cube.pos.x as usize;
let y = cube.pos.y as usize;
let z = cube.pos.z as usize;
assert!(x < self.size, "x value out of range!");
assert!(y < self.size, "y value out of range!");
assert!(z < self.size, "z value out of range!");
self.set_element_internal(cube, x, y, z);
}
}
impl<T: Clone> OctTree<T> {
pub fn create(size: usize, scale: f32) -> Result<Self> {
let mut blocks: Vec<Option<T>> = vec![];
if size == MIN_CHUNK_SIZE {
for _ in 0..MIN_CHUNK_SIZE {
for _ in 0..MIN_CHUNK_SIZE {
for _ in 0..MIN_CHUNK_SIZE {
blocks.push(None);
}
}
}
}
Ok(Self {
child_XYZ: None,
child_xYZ: None,
child_xyZ: None,
child_XyZ: None,
child_XYz: None,
child_xYz: None,
child_xyz: None,
child_Xyz: None,
blocks: blocks,
size,
scale,
})
}
pub fn set_element(&mut self, element: T, x: usize, y: usize, z: usize) {
assert!(x < self.size, "x value out of range!");
assert!(y < self.size, "y value out of range!");
assert!(z < self.size, "z value out of range!");
self.set_element_internal(element, x, y, z);
}
fn set_element_internal(&mut self, element: T, x: usize, y: usize, z: usize) {
if self.size > MIN_CHUNK_SIZE {
let mid_point = self.size / 2;
if x >= mid_point {
if y >= mid_point {
if z >= mid_point {
match &self.child_XYZ {
Some(child) => {
child.borrow_mut().set_element_internal(element, x - mid_point, y - mid_point, z - mid_point);
},
None => {
let mut child = OctTree::create(self.size / 2, self.scale).unwrap();
child.set_element_internal(element, x - mid_point, y - mid_point, z - mid_point);
self.child_XYZ = Some(Rc::new(RefCell::new(child)));
}
}
}
else {
match &self.child_XYz {
Some(child) => {
child.borrow_mut().set_element_internal(element, x - mid_point, y - mid_point, z);
},
None => {
let mut child = OctTree::create(self.size / 2, self.scale).unwrap();
child.set_element_internal(element, x - mid_point, y - mid_point, z);
self.child_XYz = Some(Rc::new(RefCell::new(child)));
}
}
}
}
else {
if z >= mid_point {
match &self.child_XyZ {
Some(child) => {
child.borrow_mut().set_element_internal(element, x - mid_point, y, z - mid_point);
},
None => {
let mut child = OctTree::create(self.size / 2, self.scale).unwrap();
child.set_element_internal(element, x - mid_point, y, z - mid_point);
self.child_XyZ = Some(Rc::new(RefCell::new(child)));
}
}
}
else {
match &self.child_Xyz {
Some(child) => {
child.borrow_mut().set_element_internal(element, x - mid_point, y, z);
},
None => {
let mut child = OctTree::create(self.size / 2, self.scale).unwrap();
child.set_element_internal(element, x - mid_point, y, z);
self.child_Xyz = Some(Rc::new(RefCell::new(child)));
}
}
}
}
}
else {
if y >= mid_point {
if z >= mid_point {
match &self.child_xYZ {
Some(child) => {
child.borrow_mut().set_element_internal(element, x, y - mid_point, z - mid_point);
},
None => {
let mut child = OctTree::create(self.size / 2, self.scale).unwrap();
child.set_element_internal(element, x, y - mid_point, z - mid_point);
self.child_xYZ = Some(Rc::new(RefCell::new(child)));
}
}
}
else {
match &self.child_xYz {
Some(child) => {
child.borrow_mut().set_element_internal(element, x, y - mid_point, z);
},
None => {
let mut child = OctTree::create(self.size / 2, self.scale).unwrap();
child.set_element_internal(element, x, y - mid_point, z);
self.child_xYz = Some(Rc::new(RefCell::new(child)));
}
}
}
}
else {
if z >= mid_point {
match &self.child_xyZ {
Some(child) => {
child.borrow_mut().set_element_internal(element, x, y, z - mid_point);
},
None => {
let mut child = OctTree::create(self.size / 2, self.scale).unwrap();
child.set_element_internal(element, x, y, z - mid_point);
self.child_xyZ = Some(Rc::new(RefCell::new(child)));
}
}
}
else {
match &self.child_xyz {
Some(child) => {
child.borrow_mut().set_element_internal(element, x, y, z);
},
None => {
let mut child = OctTree::create(self.size / 2, self.scale).unwrap();
child.set_element_internal(element, x, y, z);
self.child_xyz = Some(Rc::new(RefCell::new(child)));
}
}
}
}
}
}
else {
self.blocks[z * MIN_CHUNK_SIZE * MIN_CHUNK_SIZE + y * MIN_CHUNK_SIZE + x] = Some(element);
}
}
pub fn clear_cube(&mut self, x: usize, y: usize, z: usize) {
assert!(x < self.size, "x value out of range!");
assert!(y < self.size, "y value out of range!");
assert!(z < self.size, "z value out of range!");
//self.blocks.remove(&vec3(x as u32, y as u32, z as u32));
self.clear_cube_internal(x, y, z)
}
fn clear_cube_internal(&mut self, x: usize, y: usize, z: usize) {
if self.size > MIN_CHUNK_SIZE {
let mid_point = self.size / 2;
if x >= mid_point {
if y >= mid_point {
if z >= mid_point {
match &self.child_XYZ {
Some(child) => {
child.borrow_mut().clear_cube_internal(x - mid_point, y - mid_point, z - mid_point);
},
None => {}
}
}
else {
match &self.child_XYz {
Some(child) => {
child.borrow_mut().clear_cube_internal(x - mid_point, y - mid_point, z);
},
None => {}
}
}
}
else {
if z >= mid_point {
match &self.child_XyZ {
Some(child) => {
child.borrow_mut().clear_cube_internal(x - mid_point, y, z - mid_point);
},
None => {}
}
}
else {
match &self.child_Xyz {
Some(child) => {
child.borrow_mut().clear_cube_internal(x - mid_point, y, z);
},
None => {}
}
}
}
}
else {
if y >= mid_point {
if z >= mid_point {
match &self.child_xYZ {
Some(child) => {
child.borrow_mut().clear_cube_internal(x, y - mid_point, z - mid_point);
},
None => {}
}
}
else {
match &self.child_xYz {
Some(child) => {
child.borrow_mut().clear_cube_internal(x, y - mid_point, z);
},
None => {}
}
}
}
else {
if z >= mid_point {
match &self.child_xyZ {
Some(child) => {
child.borrow_mut().clear_cube_internal(x, y, z - mid_point);
},
None => {}
}
}
else {
match &self.child_xyz {
Some(child) => {
child.borrow_mut().clear_cube_internal(x, y, z);
},
None => {}
}
}
}
}
}
else {
self.blocks[z * MIN_CHUNK_SIZE * MIN_CHUNK_SIZE + y * MIN_CHUNK_SIZE + x] = None;
}
}
pub fn get_element(&self, x: usize, y: usize, z: usize) -> Option<T> {
if x >= self.size || y >= self.size || z >= self.size {
return None
}
if self.size > MIN_CHUNK_SIZE {
let mid_point = self.size / 2;
if x >= mid_point {
if y >= mid_point {
if z >= mid_point {
match &self.child_XYZ {
Some(child) => {
child.borrow().get_element(x - mid_point, y - mid_point, z - mid_point)
},
None => None
}
}
else {
match &self.child_XYz {
Some(child) => {
child.borrow().get_element( x - mid_point, y - mid_point, z)
},
None => None
}
}
}
else {
if z >= mid_point {
match &self.child_XyZ {
Some(child) => {
child.borrow().get_element(x - mid_point, y, z - mid_point)
},
None => None
}
}
else {
match &self.child_Xyz {
Some(child) => {
child.borrow().get_element(x - mid_point, y, z)
},
None => None
}
}
}
}
else {
if y >= mid_point {
if z >= mid_point {
match &self.child_xYZ {
Some(child) => {
child.borrow().get_element(x, y - mid_point, z - mid_point)
},
None => None
}
}
else {
match &self.child_xYz {
Some(child) => {
child.borrow().get_element(x, y - mid_point, z)
},
None => None
}
}
}
else {
if z >= mid_point {
match &self.child_xyZ {
Some(child) => {
child.borrow().get_element(x, y, z - mid_point)
},
None => None
}
}
else {
match &self.child_xyz {
Some(child) => {
child.borrow().get_element(x, y, z)
},
None => None
}
}
}
}
}
else {
self.blocks[z * MIN_CHUNK_SIZE * MIN_CHUNK_SIZE + y * MIN_CHUNK_SIZE + x].clone()
}
}
pub fn test_element(&self, x: usize, y: usize, z: usize) -> (bool, usize, (usize, usize, usize), Option<T>) {
self.test_element_internal(x, y, z, 0, 0, 0)
}
fn test_element_internal(&self, x: usize, y: usize, z: usize, node_start_x: usize, node_start_y: usize, node_start_z: usize) -> (bool, usize, (usize, usize, usize), Option<T>) {
if x >= self.size || y >= self.size || z >= self.size {
return (false, 0, (0, 0, 0), None)
}
if self.size > MIN_CHUNK_SIZE {
let mid_point = self.size / 2;
if x >= mid_point {
if y >= mid_point {
if z >= mid_point {
match &self.child_XYZ {
Some(child) => {
child.borrow().test_element_internal(x - mid_point, y - mid_point, z - mid_point, node_start_x + mid_point, node_start_y + mid_point, node_start_z + mid_point)
},
None => (false, mid_point, (node_start_x + mid_point, node_start_y + mid_point, node_start_z + mid_point), None)
}
}
else {
match &self.child_XYz {
Some(child) => {
child.borrow().test_element_internal( x - mid_point, y - mid_point, z, node_start_x + mid_point, node_start_y + mid_point, node_start_z)
},
None => (false, mid_point, (node_start_x + mid_point, node_start_y + mid_point, node_start_z), None)
}
}
}
else {
if z >= mid_point {
match &self.child_XyZ {
Some(child) => {
child.borrow().test_element_internal(x - mid_point, y, z - mid_point, node_start_x + mid_point, node_start_y, node_start_z + mid_point)
},
None => (false, mid_point, (node_start_x + mid_point, node_start_y, node_start_z + mid_point), None)
}
}
else {
match &self.child_Xyz {
Some(child) => {
child.borrow().test_element_internal(x - mid_point, y, z, node_start_x + mid_point, node_start_y, node_start_z)
},
None => (false, mid_point, (node_start_x + mid_point, node_start_y, node_start_z), None)
}
}
}
}
else {
if y >= mid_point {
if z >= mid_point {
match &self.child_xYZ {
Some(child) => {
child.borrow().test_element_internal(x, y - mid_point, z - mid_point, node_start_x, node_start_y + mid_point, node_start_z + mid_point)
},
None => (false, mid_point, (node_start_x, node_start_y + mid_point, node_start_z + mid_point), None)
}
}
else {
match &self.child_xYz {
Some(child) => {
child.borrow().test_element_internal(x, y - mid_point, z, node_start_x, node_start_y + mid_point, node_start_z)
},
None => (false, mid_point, (node_start_x, node_start_y + mid_point, node_start_z), None)
}
}
}
else {
if z >= mid_point {
match &self.child_xyZ {
Some(child) => {
child.borrow().test_element_internal(x, y, z - mid_point, node_start_x, node_start_y, node_start_z + mid_point)
},
None => (false, mid_point, (node_start_x, node_start_y, node_start_z + mid_point), None)
}
}
else {
match &self.child_xyz {
Some(child) => {
child.borrow().test_element_internal(x, y, z, node_start_x, node_start_y, node_start_z)
},
None => (false, mid_point, (node_start_x , node_start_y, node_start_z), None)
}
}
}
}
}
else {
if let Some(c) = &self.blocks[z * MIN_CHUNK_SIZE * MIN_CHUNK_SIZE + y * MIN_CHUNK_SIZE + x] {
(true, 1, (node_start_x + x, node_start_y + y, node_start_z + z), Some(c.clone()))
}
else {
(false, 1, (node_start_x + x, node_start_y + y, node_start_z + z), None)
}
}
}
}
pub struct OctTreeIter<'a> {
iter_x: usize,
iter_y: usize,
iter_z: usize,
todo: Vec<Rc<RefCell<OctTree<Cube>>>>,
chunk: &'a OctTree<Cube>
}
impl<'a> OctTreeIter<'a> {
pub fn create(chunk: &'a OctTree<Cube>) -> Result<Self> {
let mut out = Self {
iter_x: 0,
iter_y: 0,
iter_z: 0,
todo: vec![],
chunk
};
out.add_todo(&chunk);
Ok(out)
}
fn add_todo(&mut self, oct_tree: &OctTree<Cube>) {
match &oct_tree.child_XYZ {
Some(child) => {
self.todo.push(child.clone());
},
None => {},
};
match &oct_tree.child_xYZ {
Some(child) => {
self.todo.push(child.clone());
},
None => {},
};
match &oct_tree.child_xyZ {
Some(child) => {
self.todo.push(child.clone());
},
None => {},
};
match &oct_tree.child_XyZ {
Some(child) => {
self.todo.push(child.clone());
},
None => {},
};
match &oct_tree.child_XYz {
Some(child) => {
self.todo.push(child.clone());
},
None => {},
};
match &oct_tree.child_xYz {
Some(child) => {
self.todo.push(child.clone());
},
None => {},
};
match &oct_tree.child_xyz {
Some(child) => {
self.todo.push(child.clone());
},
None => {},
};
match &oct_tree.child_Xyz {
Some(child) => {
self.todo.push(child.clone());
},
None => {},
};
}
}
impl<'a> Iterator for OctTreeIter<'a> {
type Item = Option<Cube>;
fn next(&mut self) -> Option<Self::Item> {
if self.todo.len() != 0 {
while self.todo.last().unwrap().borrow().blocks.len() == 0 {
let oct_tree = self.todo.pop().unwrap();
self.add_todo(&oct_tree.borrow());
}
if self.iter_x < MIN_CHUNK_SIZE && self.iter_y < MIN_CHUNK_SIZE && self.iter_z < MIN_CHUNK_SIZE {
let result = self.todo.last().unwrap().borrow().blocks[self.iter_x + self.iter_y * MIN_CHUNK_SIZE + self.iter_z * MIN_CHUNK_SIZE * MIN_CHUNK_SIZE].clone();
self.iter_x += 1;
if self.iter_x >= MIN_CHUNK_SIZE {
self.iter_x = 0;
self.iter_y += 1;
}
if self.iter_y >= MIN_CHUNK_SIZE {
self.iter_y = 0;
self.iter_z += 1;
}
if self.iter_z == MIN_CHUNK_SIZE {
self.todo.pop();
self.iter_x = 0;
self.iter_y = 0;
self.iter_z = 0;
}
return Some(result)
}
}
self.iter_x = 0;
self.iter_y = 0;
self.iter_z = 0;
self.add_todo(&self.chunk);
None
}
}
#[cfg(test)]
mod test {
use cgmath::{Vector2, Vector3};
use super::*;
#[test]
fn test_oct_tree(){
let mut test_tree: OctTree<Cube> = OctTree::create(512, 1.0).unwrap();
let test_cube = Cube{color: Vector3 { x: 1.0, y: 0.0, z: 0.0 }, pos: Vector3 { x: 5.0, y: 2.0, z: 10.0 }, tex_coord: Vector2{x: 0.0, y: 0.0}, transparent: false, roughness: 128};
test_tree.set_cube(test_cube.clone());
let cube_result = test_tree.get_element(5, 2, 10).unwrap();
let cube_result2 = test_tree.get_element(300, 2, 10);
assert_eq!(test_cube, cube_result);
assert_eq!(cube_result2, None);
let test_iter = OctTreeIter::create(&test_tree).unwrap();
let mut count = 0;
for result in test_iter {
if let Some(_) = result {
count += 1;
}
}
assert_eq!(count, 1);
}
}