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|
use crate::position::BlockPos;
pub struct Cursor3d {
index: usize,
origin: BlockPos,
width: usize,
height: usize,
depth: usize,
end: usize,
}
impl Cursor3d {
pub fn origin(&self) -> BlockPos {
self.origin
}
}
impl Iterator for Cursor3d {
type Item = CursorIteration;
fn next(&mut self) -> Option<Self::Item> {
if self.index == self.end {
return None;
}
let x = self.index % self.width;
let r = self.index / self.width;
let y = r % self.height;
let z = r / self.height;
self.index += 1;
let mut iteration_type = 0;
if x == 0 || x == self.width - 1 {
iteration_type += 1;
}
if y == 0 || y == self.height - 1 {
iteration_type += 1;
}
if z == 0 || z == self.depth - 1 {
iteration_type += 1;
}
Some(CursorIteration {
pos: BlockPos {
x: self.origin.x + x as i32,
y: self.origin.y + y as i32,
z: self.origin.z + z as i32,
},
iteration_type: iteration_type.into(),
})
}
}
#[repr(u8)]
#[derive(Debug, Eq, PartialEq)]
pub enum CursorIterationType {
Inside = 0,
Face = 1,
Edge = 2,
Corner = 3,
}
pub struct CursorIteration {
pub pos: BlockPos,
pub iteration_type: CursorIterationType,
}
impl Cursor3d {
pub fn new(origin: BlockPos, end: BlockPos) -> Self {
let width = (end.x - origin.x + 1)
.try_into()
.unwrap_or_else(|_| panic!("Impossible width, origin: {origin:?}, end: {end:?}"));
let height = (end.y - origin.y + 1)
.try_into()
.unwrap_or_else(|_| panic!("Impossible height, origin: {origin:?}, end: {end:?}"));
let depth = (end.z - origin.z + 1)
.try_into()
.unwrap_or_else(|_| panic!("Impossible depth, origin: {origin:?}, end: {end:?}"));
Self {
index: 0,
origin,
width,
height,
depth,
end: width * height * depth,
}
}
}
impl From<u8> for CursorIterationType {
fn from(value: u8) -> Self {
match value {
0 => CursorIterationType::Inside,
1 => CursorIterationType::Face,
2 => CursorIterationType::Edge,
3 => CursorIterationType::Corner,
_ => panic!("Invalid iteration type"),
}
}
}
|
