bevy-expedition-demo/src/inventory/item.rs

use std::mem::swap;

use bevy::prelude::*;

#[derive(Component, Clone, Debug)]
pub struct Item {
    pub size: UVec2,
    pub position: Option<UVec2>,
    pub rotated: bool,
}

impl Item {
    pub fn new(size: UVec2) -> Self {
        Self { size, position: None, rotated: false }
    }

    pub fn new_positioned(size: UVec2, position: UVec2) -> Self {
        Self { size, position: Some(position), rotated: false }
    }

    pub fn rect(&self) -> Option<URect> {
        let Some(position) = self.position else {
            return None;
        };

        Some(URect::from_corners(position, position + self.size))
    }
    
    pub fn overlaps(&self, other_size: UVec2, other_position: UVec2) -> bool {
        let Some(rect) = self.rect() else {
            return false;
        };

        let other_rect = URect::from_corners(other_position, other_position + other_size);
        
        !rect.intersect(other_rect).is_empty()
    }

    /// Swap size.x with size.y
    pub fn rotate(&mut self) {
        swap(&mut self.size.x, &mut self.size.y);
        self.rotated = !self.rotated;
    }

    /// Get clone of item with swapped size
    pub fn clone_rotated(&self) -> Self {
        let mut new = self.clone();
        new.rotate();
        new
    }
}