baileytownsend.dev
Don't worry about it
Read me and comments
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README.md
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README.md
···
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# HonkBird?
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Idk i'm still working on the name. A gba game written in rust
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with [agb-rs](https://agbrs.dev/). Heavily wip, just need it in a git repo so I can hack on it on another computer.
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If you're really wanting to run this, check the [agb book out](https://agbrs.dev/book/), first couple chapters will get
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you going
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Special thanks
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- The goose is from [here](https://duckhive.itch.io/goose). Just scaled it down to 16x16 and animated it in aseprite
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src/game.rs
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src/game.rs
···
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use crate::{Fixed, goose_sprites};
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use agb::display::object::Object;
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use agb::display::{GraphicsFrame, HEIGHT, Priority, WIDTH};
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use agb::fixnum::{Num, Vector2D, num, vec2};
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use agb::input::Button;
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pub enum GameState {
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Start,
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Playing,
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GameOver,
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}
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pub struct GameLoop {
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pub score: u16,
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pub game_state: GameState,
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}
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impl GameLoop {
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pub fn new() -> Self {
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Self {
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score: 0,
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game_state: GameState::Start,
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}
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}
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pub fn run(&mut self, gba: &mut agb::Gba) {
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let mut gfx = gba.graphics.get();
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let mut button_controller = agb::input::ButtonController::new();
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let mut goose = Goose::new();
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loop {
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button_controller.update();
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let mut frame = gfx.frame();
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let just_pressed = button_controller.is_just_pressed(Button::A);
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goose.move_goose(just_pressed);
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goose.show(&mut frame);
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frame.commit();
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}
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}
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}
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/// I really don't have a better name for these
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#[derive(Copy, Clone)]
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pub enum GooseState {
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Zero = 0,
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One = 1,
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Two = 2,
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Three = 3,
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}
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pub struct Goose {
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pos: Vector2D<Fixed>,
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velocity: Vector2D<Fixed>,
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current_state: GooseState,
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//Should increase every game play loop and reset at 64
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tick_counter: u8,
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}
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impl Goose {
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pub fn new() -> Self {
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Self {
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pos: vec2(num!(5), num!(5)),
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velocity: vec2(num!(0.20), num!(0)),
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current_state: GooseState::Zero,
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tick_counter: 0,
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}
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}
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pub fn show(&mut self, frame: &mut GraphicsFrame) {
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let _ = Object::new(goose_sprites::GOOSE.sprite(self.current_state as usize))
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.set_pos(self.pos.round())
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.set_priority(Priority::P1)
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.show(frame);
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}
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fn animate(&mut self) {
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// Advance animation every 8 ticks
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self.tick_counter = self.tick_counter.wrapping_add(1);
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if self.tick_counter % 8 == 0 {
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self.current_state = match self.current_state {
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GooseState::Zero => GooseState::One,
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GooseState::One => GooseState::Two,
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GooseState::Two => GooseState::Three,
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GooseState::Three => GooseState::Zero,
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}
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}
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//Just a catch to not let that number get too big
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if self.tick_counter >= 64 {
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self.tick_counter = 0;
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}
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}
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fn reset(&mut self) {
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self.pos = vec2(num!(5), num!(5));
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self.velocity = vec2(num!(0.20), num!(0));
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}
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pub fn move_goose(&mut self, button_pressed: bool) {
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//If the button is pressed, go up a bit
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if button_pressed {
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self.velocity.y = num!(-1);
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} else {
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self.velocity.y += num!(0.02);
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}
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self.pos += self.velocity;
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//Right now just cycling through may change animations around
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self.animate();
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//Keep in frame right now. Will later do the scrolling map thing
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if self.pos.y < num!(0) {
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self.pos.y = num!(0);
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self.velocity.y = num!(0);
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}
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if self.pos.y >= num!(HEIGHT) {
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//TODO call game end here later
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self.reset();
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}
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// Keep X within screen horizontally (optional: clamp)
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if self.pos.x < num!(0) {
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self.pos.x = num!(0);
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}
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let max_x = num!(WIDTH - 1);
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if self.pos.x > max_x {
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self.pos.x = max_x;
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}
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}
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}
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-152
src/main.rs
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-152
src/main.rs
···
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#![cfg_attr(test, reexport_test_harness_main = "test_main")]
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#![cfg_attr(test, test_runner(agb::test_runner::test_runner))]
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mod game;
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// By default no_std crates don't get alloc, so you won't be able to use things like Vec
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// until you declare the extern crate. `agb` provides an allocator so it will all work
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extern crate alloc;
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use agb::display::{GraphicsFrame, Priority, Rgb15};
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use crate::game::{GameLoop, GameState};
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use agb::display::font::{AlignmentKind, Font, Layout, RegularBackgroundTextRenderer};
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use agb::display::object::Object;
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use agb::display::tiled::{RegularBackground, RegularBackgroundSize, TileFormat, VRAM_MANAGER};
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use agb::fixnum::{num, vec2, FixedNum, Num, Vector2D};
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use agb::display::{Priority, Rgb15};
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use agb::fixnum::Num;
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use agb::input::Button;
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use agb::{include_aseprite, include_font};
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use agb::input::Button;
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const SCREEN_W: i32 = 240;
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const SCREEN_H: i32 = 160;
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include_aseprite!(
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mod goose_sprites,
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"gfx/flap_animated.aseprite"
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);
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static FONT: Font = include_font!("fnt/Born2bSportyV2.ttf", 20);
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static FONT: Font = include_font!("fnt/Born2bSportyV2.ttf", 24);
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type Fixed = Num<i32, 8>;
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#[agb::entry]
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fn main(mut gba: agb::Gba) -> ! {
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TileFormat::FourBpp,
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);
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let mut text_layout = Layout::new(
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"Hello, this is some text that I want to display!",
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"HonkBird\nPress Start to play",
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&FONT,
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AlignmentKind::Left,
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32,
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200,
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);
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let mut text_renderer = RegularBackgroundTextRenderer::new((4, 0));
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let mut text_renderer = RegularBackgroundTextRenderer::new((4, 50));
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let mut button_controller = agb::input::ButtonController::new();
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loop {
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match game.game_state {
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GameState::Start => {
···
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if let Some(letter) = text_layout.next() {
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text_renderer.show(&mut bg, &letter);
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}
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if button_controller.is_just_pressed(Button::A) {
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if button_controller.is_just_pressed(Button::START) {
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game.game_state = GameState::Playing;
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}
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// Scope the graphics borrow to this arm only
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let mut gfx = gba.graphics.get();
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let mut frame = gfx.frame();
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···
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frame.commit();
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}
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GameState::Playing => {
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game.run(&mut gba);
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game.run(&mut gba);
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}
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GameState::GameOver => {}
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}
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}
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}
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pub enum GameState {
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Start,
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Playing,
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GameOver,
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}
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struct GameLoop {
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still_going: bool,
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score: u16,
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game_state: GameState
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}
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impl GameLoop {
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pub fn new() -> Self {
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Self {
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still_going: true,
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score: 0,
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game_state: GameState::Start,
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}
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}
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pub fn run(&mut self, gba: &mut agb::Gba) {
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let mut gfx = gba.graphics.get();
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let mut button_controller = agb::input::ButtonController::new();
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let mut goose = Goose::new();
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loop {
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button_controller.update();
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let mut frame = gfx.frame();
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let just_pressed = button_controller.is_just_pressed(Button::A);
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goose.move_goose(just_pressed);
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goose.show(&mut frame);
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frame.commit();
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}
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}
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}
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/// I really don't have a better name for these
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#[derive(Copy, Clone)]
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pub enum GooseState {
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Zero = 0,
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One = 1,
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Two = 2,
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Three = 3,
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}
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struct Goose {
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pos: Vector2D<Fixed>,
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velocity: Vector2D<Fixed>,
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current_state: GooseState,
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frame_counter: u16,
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}
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impl Goose {
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pub fn new() -> Self {
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Self {
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pos: vec2(num!(5), num!(5)),
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velocity: vec2(num!(0.20), num!(0)),
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current_state: GooseState::Zero,
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frame_counter: 0,
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}
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}
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pub fn show(&mut self, frame: &mut GraphicsFrame) {
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let _ = Object::new(goose_sprites::GOOSE.sprite(self.current_state as usize))
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.set_pos(self.pos.round())
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.set_priority(Priority::P1)
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.show(frame);
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}
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fn animate(&mut self) {
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// Advance animation every 8 frames
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self.frame_counter = self.frame_counter.wrapping_add(1);
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if self.frame_counter % 8 == 0 {
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self.current_state = match self.current_state {
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GooseState::Zero => GooseState::One,
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GooseState::One => GooseState::Two,
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GooseState::Two => GooseState::Three,
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GooseState::Three => GooseState::Zero,
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}
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}
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}
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fn reset(&mut self) {
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self.pos = vec2(num!(5), num!(5));
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self.velocity = vec2(num!(0), num!(0));
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}
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pub fn move_goose(&mut self, button_pressed: bool) {
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// Flap impulse
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if button_pressed {
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// Give an upward kick similar to Flappy Bird
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self.velocity.y = num!(-1);
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}else{
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// Gravity pulls down constantly
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self.velocity.y += num!(0.02);
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}
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// Apply velocity to position
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self.pos += self.velocity;
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// Animate sprite
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self.animate();
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// Screen bounds checking (top-left is 0,0; bottom-right is 240,160)
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// Loop/reset when going out of vertical bounds
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if self.pos.y < num!(0) {
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self.pos.y = num!(0);
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self.velocity.y = num!(0);
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}
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if self.pos.y >= Num::<i32, 8>::from_raw((SCREEN_H as i32) << 8) {
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// Off the bottom of the screen — reset to start like a flappy-bird loop
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self.reset();
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}
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// Keep X within screen horizontally (optional: clamp)
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if self.pos.x < num!(0) {
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self.pos.x = num!(0);
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}
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let max_x = Num::<i32, 8>::from_raw((SCREEN_W as i32 - 1) << 8);
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if self.pos.x > max_x {
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self.pos.x = max_x;
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}
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}
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}