38 lines
940 B
Rust
38 lines
940 B
Rust
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use bevy::prelude::*;
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use serde::{Deserialize, Serialize};
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use crate::components::GridPos;
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/// World units per tile. Tiled maps are expected to use the same tile size,
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/// other sizes are scaled to fit.
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pub const TILE_SIZE: f32 = 32.0;
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#[derive(Clone, Copy, Debug, Default, PartialEq, Eq, Hash, Serialize, Deserialize)]
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pub enum Dir {
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North,
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#[default]
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South,
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East,
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West,
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}
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impl Dir {
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/// Grid delta, with `y` pointing down like in Tiled.
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pub fn delta(self) -> (i32, i32) {
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match self {
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Dir::North => (0, -1),
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Dir::South => (0, 1),
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Dir::East => (1, 0),
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Dir::West => (-1, 0),
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}
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}
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}
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/// Converts a grid position to the center of the tile in Bevy world space (y up).
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pub fn grid_to_world(pos: GridPos) -> Vec2 {
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Vec2::new(
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pos.x as f32 * TILE_SIZE + TILE_SIZE / 2.0,
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-(pos.y as f32 * TILE_SIZE + TILE_SIZE / 2.0),
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)
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}
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