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103 lines
3.8 KiB
Rust
103 lines
3.8 KiB
Rust
//! This module contains all the constants used in the game.
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use std::time::Duration;
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use glam::UVec2;
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/// Target frame duration for 60 FPS game loop timing.
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///
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/// Calculated as 1/60th of a second (≈16.67ms).
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///
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/// Written out explicitly to satisfy const-eval constraints.
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pub const LOOP_TIME: Duration = Duration::from_nanos((1_000_000_000.0 / 60.0) as u64);
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/// The size of each cell, in pixels.
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pub const CELL_SIZE: u32 = 8;
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/// The size of the game board, in cells.
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pub const BOARD_CELL_SIZE: UVec2 = UVec2::new(28, 31);
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/// The scale factor for the window (integer zoom)
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pub const SCALE: f32 = 2.6;
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/// Game board offset from window origin to reserve space for HUD elements.
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///
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/// The 3-cell vertical offset (24 pixels) provides space at the top of the
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/// screen for score display, player lives, and other UI elements.
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pub const BOARD_CELL_OFFSET: UVec2 = UVec2::new(0, 3);
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/// Pixel-space equivalent of `BOARD_CELL_OFFSET` for rendering calculations.
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///
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/// Automatically calculated from the cell offset to maintain consistency
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/// when the cell size changes. Used for positioning sprites and debug overlays.
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pub const BOARD_PIXEL_OFFSET: UVec2 = UVec2::new(BOARD_CELL_OFFSET.x * CELL_SIZE, BOARD_CELL_OFFSET.y * CELL_SIZE);
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/// Animation timing constants for ghost state management
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pub mod animation {
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/// Normal ghost movement animation speed (ticks per frame at 60 ticks/sec)
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pub const GHOST_NORMAL_SPEED: u16 = 12;
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/// Eaten ghost (eyes) animation speed (ticks per frame at 60 ticks/sec)
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pub const GHOST_EATEN_SPEED: u16 = 6;
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/// Frightened ghost animation speed (ticks per frame at 60 ticks/sec)
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pub const GHOST_FRIGHTENED_SPEED: u16 = 12;
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/// Time in ticks when frightened ghosts start flashing (2 seconds at 60 FPS)
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pub const FRIGHTENED_FLASH_START_TICKS: u32 = 120;
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}
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/// The size of the canvas, in pixels.
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pub const CANVAS_SIZE: UVec2 = UVec2::new(
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(BOARD_CELL_SIZE.x + BOARD_CELL_OFFSET.x) * CELL_SIZE,
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(BOARD_CELL_SIZE.y + BOARD_CELL_OFFSET.y) * CELL_SIZE,
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);
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/// Map tile types that define gameplay behavior and collision properties.
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#[derive(Debug, Clone, Copy, PartialEq)]
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pub enum MapTile {
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/// Traversable space with no collectible items
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Empty,
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Wall,
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/// Small collectible. Implicitly a traversable tile.
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Pellet,
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/// Large collectible. Implicitly a traversable tile.
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PowerPellet,
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/// Special traversable tile that connects to tunnel portals.
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Tunnel,
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}
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/// ASCII art representation of the classic Pac-Man maze layout.
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///
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/// Uses character symbols to define the game world. This layout is parsed by `MapTileParser`
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/// to generate the navigable graph and collision geometry.
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pub const RAW_BOARD: [&str; BOARD_CELL_SIZE.y as usize] = [
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"############################",
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"#............##............#",
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"#.####.#####.##.#####.####.#",
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"#o####.#####.##.#####.####o#",
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"#.####.#####.##.#####.####.#",
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"#..........................#",
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"#.####.##.########.##.####.#",
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"#.####.##.########.##.####.#",
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"#......##....##....##......#",
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"######.##### ## #####.######",
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" #.##### ## #####.# ",
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" #.## == ##.# ",
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" #.## ######## ##.# ",
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"######.## ######## ##.######",
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"T . ######## . T",
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"######.## ######## ##.######",
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" #.## ######## ##.# ",
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" #.## ##.# ",
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" #.## ######## ##.# ",
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"######.## ######## ##.######",
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"#............##............#",
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"#.####.#####.##.#####.####.#",
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"#.####.#####.##.#####.####.#",
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"#o..##.......X .......##..o#",
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"###.##.##.########.##.##.###",
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"###.##.##.########.##.##.###",
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"#......##....##....##......#",
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"#.##########.##.##########.#",
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"#.##########.##.##########.#",
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"#..........................#",
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"############################",
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];
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