76 lines
1.7 KiB
Rust
76 lines
1.7 KiB
Rust
use std::cmp::max;
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/// describes an character (PC or NPC) in the dungeon that has a position.
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pub trait HasPosition {
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/// returns a mutable position
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fn get_position(&mut self) -> &mut Position;
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/// returns an immutable position
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fn get_immutable_position(&self) -> &Position;
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}
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#[derive(PartialEq, Debug)]
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pub struct Position {
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level: usize,
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x: usize,
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y: usize,
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}
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impl Position {
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pub fn new(level: usize, x: usize, y: usize) -> Self {
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Self {
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level,
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x,
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y,
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}
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}
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pub fn change(&mut self, dx: i16, dy: i16) -> (usize, usize) {
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self.x = max((self.x as i16) + dx, 0) as usize;
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self.y = max((self.y as i16) + dy, 0) as usize;
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(self.x, self.y)
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}
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pub fn set(&mut self, level: usize, x: usize, y: usize) {
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self.level = level;
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self.x = x;
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self.y = y;
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}
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pub fn get_level(&self) -> usize {
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self.level
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}
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pub fn get_x(&self) -> usize {
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self.x
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}
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pub fn get_y(&self) -> usize { self.y }
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}
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#[test]
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fn test_position_change() {
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let mut p = Position::new(0, 10, 10);
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let res = p.change(-1, 1);
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assert_eq!(res, (9, 11));
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assert_eq!(p.get_x(), 9);
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assert_eq!(p.get_y(), 11);
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let res = p.change(-9, 1);
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assert_eq!(res, (0, 12));
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assert_eq!(p.get_x(), 0);
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assert_eq!(p.get_y(), 12);
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let res = p.change(-1, -13);
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assert_eq!(res, (0, 0));
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assert_eq!(p.get_x(), 0);
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assert_eq!(p.get_y(), 0);
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}
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#[test]
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fn test_position_set() {
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let mut p = Position::new(0, 10, 10);
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p.set(1, 2, 3);
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assert_eq!(p.get_level(), 1);
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assert_eq!(p.get_x(), 2);
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assert_eq!(p.get_y(), 3);
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} |