[kaka/rust-sdl-test.git] / src / core / game.rs

use ActiveState;
use AppState;
use common::{Point, Radians};
use core::app::StateChange;
use core::controller::Controller;
use core::controller::ControllerManager;
use core::level::{Level, LevelGenerator};
use core::render::Renderer;
use point;
use sdl2::event::Event;
use sdl2::joystick::PowerLevel;
use sdl2::keyboard::Keycode;
use sdl2::rect::Rect;
use sprites::SpriteManager;
use std::cell::RefCell;
use std::rc::Rc;
use time::Duration;

////////// GAMESTATE ///////////////////////////////////////////////////////////

#[derive(Default)]
pub struct GameState {
    world: World,
    lvlgen: LevelGenerator,
}

impl GameState {
    pub fn new() -> Self {
	let lvlgen = LevelGenerator::new(0, 5);
	GameState {
	    world: World::new(lvlgen.generate()),
	    lvlgen,
	}
    }
}

impl AppState for GameState {
    fn enter(&mut self, ctrl_man: &ControllerManager) {
	for (_k, v) in ctrl_man.controllers.iter() {
	    self.world.add(Box::new(Character::new(v.clone())));
	}
    }

    fn leave(&mut self) {}

    fn update(&mut self, dt: Duration) -> Option<StateChange> {
	self.world.update(dt);
	None
    }

    fn render(&mut self, renderer: &mut Renderer, sprites: &SpriteManager) {
	self.world.render(renderer, sprites);
    }

    fn handle_event(&mut self, event: Event) -> Option<StateChange> {
	match event {
	    Event::KeyDown { keycode: Some(Keycode::Escape), .. } => {
		return Some(StateChange::Pop)
            }
	    Event::KeyDown { keycode: Some(Keycode::Return), .. } => {
		return Some(StateChange::Push(Box::new(ActiveState::new((800, 600)))))
            }
	    Event::KeyDown { keycode: Some(Keycode::Space), .. } => {
		self.lvlgen.seed = std::time::UNIX_EPOCH.elapsed().unwrap().as_secs() as u32;
		self.world.level = self.lvlgen.generate();
	    }
	    Event::KeyDown { keycode: Some(Keycode::KpPlus), .. } => {
		self.lvlgen.iterations += 1;
		println!("{} iteration(s) of cellular automata", self.lvlgen.iterations);
		self.world.level = self.lvlgen.generate();
	    }
	    Event::KeyDown { keycode: Some(Keycode::KpMinus), .. } => {
		if self.lvlgen.iterations > 0 {
		    self.lvlgen.iterations -= 1;
		    println!("{} iteration(s) of cellular automata", self.lvlgen.iterations);
		    self.world.level = self.lvlgen.generate();
		}
	    }
	    _ => {}
	}
	None
    }
}

////////// WORLD ///////////////////////////////////////////////////////////////

#[derive(Default)]
pub struct World {
    level: Level,
    objects: Objects,
}

impl World {
    pub fn new(level: Level) -> Self {
	World {
	    level,
	    ..Default::default()
	}
    }

    pub fn update(&mut self, dt: Duration) {
	let mut breeding_ground = vec!();

	for i in (0..self.objects.len()).rev() {
	    if self.objects[i].update(&mut breeding_ground, &self.level, dt) == Dead {
		self.objects.remove(i); // swap_remove is more efficient, but changes the order of the array
	    }
	}

	for o in breeding_ground {
	    self.add(o);
	}

	println!("\x1b[Kobject count: {}\x1b[1A", self.objects.len()); // clear line, print, move cursor up
    }

    pub fn render(&mut self, renderer: &mut Renderer, sprites: &SpriteManager) {
	self.level.render(renderer, sprites);
	for o in &mut self.objects {
	    o.render(renderer, sprites);
	}
    }

    pub fn add(&mut self, object: Box<dyn Object>) {
	self.objects.push(object);
    }
}

////////// OBJECT //////////////////////////////////////////////////////////////

type Objects = Vec<Box<dyn Object>>;

pub trait Object {
    fn update(&mut self, objects: &mut Objects, lvl: &Level, dt: Duration) -> ObjectState;
    fn render(&self, _renderer: &mut Renderer, _sprites: &SpriteManager) {}
}

#[derive(PartialEq)]
pub enum ObjectState { Alive, Dead }
use self::ObjectState::*;


pub trait Physical {}
pub trait Drawable {}

////////// CHARACTER ///////////////////////////////////////////////////////////

pub struct Character {
    ctrl: Rc<RefCell<Controller>>,
    pos: Point<f64>,
    vel: Point<f64>,
}

impl Character {
    pub fn new(ctrl: Rc<RefCell<Controller>>) -> Self {
	Character {
	    ctrl,
	    pos: point!(300.0, 300.0),
	    vel: point!(0.0, 0.0),
	}
    }
}

impl Object for Character {
    fn update(&mut self, objects: &mut Objects, lvl: &Level, dt: Duration) -> ObjectState {
	let ctrl = self.ctrl.borrow();

	let x = (self.pos.x / lvl.grid.cell_size as f64).min(lvl.grid.width as f64 - 1.0).max(0.0) as usize;
	let y = (self.pos.y / lvl.grid.cell_size as f64).min(lvl.grid.height as f64 - 1.0).max(0.0) as usize;
	self.vel += lvl.gravity;
	if lvl.grid.cells[x][y] {
	    if self.vel.y > 0.0 && !(ctrl.mov.down() && ctrl.jump.is_pressed) {
		self.vel.y = 0.0;
		self.vel.x *= 0.9;
		self.pos.y -= 1.0;
	    }

	    if !ctrl.mov.down() {
		if ctrl.jump.is_pressed && !ctrl.jump.was_pressed {
		    self.vel.y = -5.0;
		}
	    }
	}
	self.pos += self.vel;

	if ctrl.shoot.is_pressed {
	    use rand::distributions::{Distribution, Normal};
	    let normal = Normal::new(0.0, 0.1);
	    let direction = if ctrl.aim.to_point().length() > 0.1 { ctrl.aim.to_point() } else { ctrl.mov.to_point() };
	    for _i in 0..100 {
		objects.push(Box::new(Boll {
		    pos: self.pos,
		    vel: direction * (10.0 + rand::random::<f64>()) + point!(normal.sample(&mut rand::thread_rng()), normal.sample(&mut rand::thread_rng())) + self.vel,
		    bounces: 2,
		}));
	    }
	    ctrl.rumble(1.0, dt);
	    self.vel -= direction * 0.1;
	}

	if ctrl.start.is_pressed && !ctrl.start.was_pressed {
	    match ctrl.device.power_level() {
		Ok(PowerLevel::Unknown) => { println!("power level unknown"); }
		Ok(PowerLevel::Empty) => { println!("power level empty"); }
		Ok(PowerLevel::Low) => { println!("power level low"); }
		Ok(PowerLevel::Medium) => { println!("power level medium"); }
		Ok(PowerLevel::Full) => { println!("power level full"); }
		Ok(PowerLevel::Wired) => { println!("power level wired"); }
		Err(_) => {}
	    };
	}

	match ctrl.mov.x {
	    v if v < -0.9 && self.vel.x > -5.0 => { self.vel.x -= 0.5 }
	    v if v > 0.9 && self.vel.x < 5.0 => { self.vel.x += 0.5 }
	    _ => {}
	}

	Alive
    }

    fn render(&self, renderer: &mut Renderer, sprites: &SpriteManager) {
        let block = sprites.get("mario");
	let size = 32;
        renderer.blit(block, None, Rect::new(self.pos.x as i32 - size as i32 / 2, self.pos.y as i32 - size as i32, size, size));

	let ctrl = &self.ctrl.borrow();
	let l = 300.0;
	let pos = (self.pos.x as i32, self.pos.y as i32);
	// // axis values
	// let p = (self.pos + ctrl.aim.to_axis_point() * l).to_i32().into();
	// renderer.draw_line(pos, p, (0, 255, 0));
	// draw_cross(renderer, p);
	// values limited to unit vector
	let p = (self.pos + ctrl.aim.to_point() * l).to_i32().into();
	renderer.draw_line(pos, p, (255, 0, 0));
	draw_cross(renderer, p);
	let p = (self.pos + ctrl.mov.to_point() * l).to_i32().into();
	renderer.draw_line(pos, p, (0, 255, 0));
	draw_cross(renderer, p);
	// // circle values
	// let p = (self.pos + Point::from(ctrl.aim.a) * l).to_i32().into();
	// renderer.draw_line(pos, p, (0, 0, 255));
	// draw_cross(renderer, p);
    }
}

fn draw_cross(renderer: &mut Renderer, p: (i32, i32)) {
    renderer.canvas().draw_line((p.0 - 5, p.1), (p.0 + 5, p.1)).unwrap();
    renderer.canvas().draw_line((p.0, p.1 - 5), (p.0, p.1 + 5)).unwrap();
}

////////// BOLL ////////////////////////////////////////////////////////////////

pub struct Boll {
    pos: Point<f64>,
    vel: Point<f64>,
    bounces: u8,
}

impl Object for Boll {
    fn update(&mut self, objects: &mut Objects, lvl: &Level, _dt: Duration) -> ObjectState {
	self.vel += lvl.gravity;
	self.pos += self.vel;

	let x = (self.pos.x / lvl.grid.cell_size as f64).min(lvl.grid.width as f64 - 1.0).max(0.0) as usize;
	let y = (self.pos.y / lvl.grid.cell_size as f64).min(lvl.grid.height as f64 - 1.0).max(0.0) as usize;
	if lvl.grid.cells[x][y] {
	    if self.bounces == 0 {
		return Dead
	    }
	    self.vel *= -0.25;
	    self.pos += self.vel;
	    self.bounces -= 1;
	    use rand::distributions::{Distribution, Normal};
	    let mut rng = rand::thread_rng();
	    let a = Radians(self.vel.to_radians().0 + Normal::new(0.0, 0.75).sample(&mut rng));
	    objects.push(Box::new(Boll {
	    	vel: Point::from(a) * Normal::new(1.0, 0.25).sample(&mut rng) * self.vel.length(),
	    	..*self
	    }));
	}

	Alive
    }

    fn render(&self, renderer: &mut Renderer, _sprites: &SpriteManager) {
        let block = _sprites.get("block");
	let size = 4 + self.bounces * 6;
        renderer.blit(block, None, Rect::new(self.pos.x as i32 - size as i32 / 2, self.pos.y as i32 - size as i32 / 2, size as u32, size as u32));
	// renderer.canvas().set_draw_color((0, self.bounces * 100, 255));
	// renderer.canvas().draw_point((self.pos.x as i32, self.pos.y as i32)).unwrap();
    }
}
Commit	Line	Data
	1	use ActiveState;
	2	use AppState;
	3	use common::{Point, Radians};
	4	use core::app::StateChange;
	5	use core::controller::Controller;
	6	use core::controller::ControllerManager;
	7	use core::level::{Level, LevelGenerator};
	8	use core::render::Renderer;
	9	use point;
	10	use sdl2::event::Event;
	11	use sdl2::joystick::PowerLevel;
	12	use sdl2::keyboard::Keycode;
	13	use sdl2::rect::Rect;
	14	use sprites::SpriteManager;
	15	use std::cell::RefCell;
	16	use std::rc::Rc;
	17	use time::Duration;
	18
	19	////////// GAMESTATE ///////////////////////////////////////////////////////////
	20
	21	#[derive(Default)]
	22	pub struct GameState {
	23	world: World,
	24	lvlgen: LevelGenerator,
	25	}
	26
	27	impl GameState {
	28	pub fn new() -> Self {
	29	let lvlgen = LevelGenerator::new(0, 5);
	30	GameState {
	31	world: World::new(lvlgen.generate()),
	32	lvlgen,
	33	}
	34	}
	35	}
	36
	37	impl AppState for GameState {
	38	fn enter(&mut self, ctrl_man: &ControllerManager) {
	39	for (_k, v) in ctrl_man.controllers.iter() {
	40	self.world.add(Box::new(Character::new(v.clone())));
	41	}
	42	}
	43
	44	fn leave(&mut self) {}
	45
	46	fn update(&mut self, dt: Duration) -> Option<StateChange> {
	47	self.world.update(dt);
	48	None
	49	}
	50
	51	fn render(&mut self, renderer: &mut Renderer, sprites: &SpriteManager) {
	52	self.world.render(renderer, sprites);
	53	}
	54
	55	fn handle_event(&mut self, event: Event) -> Option<StateChange> {
	56	match event {
	57	Event::KeyDown { keycode: Some(Keycode::Escape), .. } => {
	58	return Some(StateChange::Pop)
	59	}
	60	Event::KeyDown { keycode: Some(Keycode::Return), .. } => {
	61	return Some(StateChange::Push(Box::new(ActiveState::new((800, 600)))))
	62	}
	63	Event::KeyDown { keycode: Some(Keycode::Space), .. } => {
	64	self.lvlgen.seed = std::time::UNIX_EPOCH.elapsed().unwrap().as_secs() as u32;
	65	self.world.level = self.lvlgen.generate();
	66	}
	67	Event::KeyDown { keycode: Some(Keycode::KpPlus), .. } => {
	68	self.lvlgen.iterations += 1;
	69	println!("{} iteration(s) of cellular automata", self.lvlgen.iterations);
	70	self.world.level = self.lvlgen.generate();
	71	}
	72	Event::KeyDown { keycode: Some(Keycode::KpMinus), .. } => {
	73	if self.lvlgen.iterations > 0 {
	74	self.lvlgen.iterations -= 1;
	75	println!("{} iteration(s) of cellular automata", self.lvlgen.iterations);
	76	self.world.level = self.lvlgen.generate();
	77	}
	78	}
	79	_ => {}
	80	}
	81	None
	82	}
	83	}
	84
	85	////////// WORLD ///////////////////////////////////////////////////////////////
	86
	87	#[derive(Default)]
	88	pub struct World {
	89	level: Level,
	90	objects: Objects,
	91	}
	92
	93	impl World {
	94	pub fn new(level: Level) -> Self {
	95	World {
	96	level,
	97	..Default::default()
	98	}
	99	}
	100
	101	pub fn update(&mut self, dt: Duration) {
	102	let mut breeding_ground = vec!();
	103
	104	for i in (0..self.objects.len()).rev() {
	105	if self.objects[i].update(&mut breeding_ground, &self.level, dt) == Dead {
	106	self.objects.remove(i); // swap_remove is more efficient, but changes the order of the array
	107	}
	108	}
	109
	110	for o in breeding_ground {
	111	self.add(o);
	112	}
	113
	114	println!("\x1b[Kobject count: {}\x1b[1A", self.objects.len()); // clear line, print, move cursor up
	115	}
	116
	117	pub fn render(&mut self, renderer: &mut Renderer, sprites: &SpriteManager) {
	118	self.level.render(renderer, sprites);
	119	for o in &mut self.objects {
	120	o.render(renderer, sprites);
	121	}
	122	}
	123
	124	pub fn add(&mut self, object: Box<dyn Object>) {
	125	self.objects.push(object);
	126	}
	127	}
	128
	129	////////// OBJECT //////////////////////////////////////////////////////////////
	130
	131	type Objects = Vec<Box<dyn Object>>;
	132
	133	pub trait Object {
	134	fn update(&mut self, objects: &mut Objects, lvl: &Level, dt: Duration) -> ObjectState;
	135	fn render(&self, _renderer: &mut Renderer, _sprites: &SpriteManager) {}
	136	}
	137
	138	#[derive(PartialEq)]
	139	pub enum ObjectState { Alive, Dead }
	140	use self::ObjectState::*;
	141
	142
	143	pub trait Physical {}
	144	pub trait Drawable {}
	145
	146	////////// CHARACTER ///////////////////////////////////////////////////////////
	147
	148	pub struct Character {
	149	ctrl: Rc<RefCell<Controller>>,
	150	pos: Point<f64>,
	151	vel: Point<f64>,
	152	}
	153
	154	impl Character {
	155	pub fn new(ctrl: Rc<RefCell<Controller>>) -> Self {
	156	Character {
	157	ctrl,
	158	pos: point!(300.0, 300.0),
	159	vel: point!(0.0, 0.0),
	160	}
	161	}
	162	}
	163
	164	impl Object for Character {
	165	fn update(&mut self, objects: &mut Objects, lvl: &Level, dt: Duration) -> ObjectState {
	166	let ctrl = self.ctrl.borrow();
	167
	168	let x = (self.pos.x / lvl.grid.cell_size as f64).min(lvl.grid.width as f64 - 1.0).max(0.0) as usize;
	169	let y = (self.pos.y / lvl.grid.cell_size as f64).min(lvl.grid.height as f64 - 1.0).max(0.0) as usize;
	170	self.vel += lvl.gravity;
	171	if lvl.grid.cells[x][y] {
	172	if self.vel.y > 0.0 && !(ctrl.mov.down() && ctrl.jump.is_pressed) {
	173	self.vel.y = 0.0;
	174	self.vel.x *= 0.9;
	175	self.pos.y -= 1.0;
	176	}
	177
	178	if !ctrl.mov.down() {
	179	if ctrl.jump.is_pressed && !ctrl.jump.was_pressed {
	180	self.vel.y = -5.0;
	181	}
	182	}
	183	}
	184	self.pos += self.vel;
	185
	186	if ctrl.shoot.is_pressed {
	187	use rand::distributions::{Distribution, Normal};
	188	let normal = Normal::new(0.0, 0.1);
	189	let direction = if ctrl.aim.to_point().length() > 0.1 { ctrl.aim.to_point() } else { ctrl.mov.to_point() };
	190	for _i in 0..100 {
	191	objects.push(Box::new(Boll {
	192	pos: self.pos,
	193	vel: direction * (10.0 + rand::random::<f64>()) + point!(normal.sample(&mut rand::thread_rng()), normal.sample(&mut rand::thread_rng())) + self.vel,
	194	bounces: 2,
	195	}));
	196	}
	197	ctrl.rumble(1.0, dt);
	198	self.vel -= direction * 0.1;
	199	}
	200
	201	if ctrl.start.is_pressed && !ctrl.start.was_pressed {
	202	match ctrl.device.power_level() {
	203	Ok(PowerLevel::Unknown) => { println!("power level unknown"); }
	204	Ok(PowerLevel::Empty) => { println!("power level empty"); }
	205	Ok(PowerLevel::Low) => { println!("power level low"); }
	206	Ok(PowerLevel::Medium) => { println!("power level medium"); }
	207	Ok(PowerLevel::Full) => { println!("power level full"); }
	208	Ok(PowerLevel::Wired) => { println!("power level wired"); }
	209	Err(_) => {}
	210	};
	211	}
	212
	213	match ctrl.mov.x {
	214	v if v < -0.9 && self.vel.x > -5.0 => { self.vel.x -= 0.5 }
	215	v if v > 0.9 && self.vel.x < 5.0 => { self.vel.x += 0.5 }
	216	_ => {}
	217	}
	218
	219	Alive
	220	}
	221
	222	fn render(&self, renderer: &mut Renderer, sprites: &SpriteManager) {
	223	let block = sprites.get("mario");
	224	let size = 32;
	225	renderer.blit(block, None, Rect::new(self.pos.x as i32 - size as i32 / 2, self.pos.y as i32 - size as i32, size, size));
	226
	227	let ctrl = &self.ctrl.borrow();
	228	let l = 300.0;
	229	let pos = (self.pos.x as i32, self.pos.y as i32);
	230	// // axis values
	231	// let p = (self.pos + ctrl.aim.to_axis_point() * l).to_i32().into();
	232	// renderer.draw_line(pos, p, (0, 255, 0));
	233	// draw_cross(renderer, p);
	234	// values limited to unit vector
	235	let p = (self.pos + ctrl.aim.to_point() * l).to_i32().into();
	236	renderer.draw_line(pos, p, (255, 0, 0));
	237	draw_cross(renderer, p);
	238	let p = (self.pos + ctrl.mov.to_point() * l).to_i32().into();
	239	renderer.draw_line(pos, p, (0, 255, 0));
	240	draw_cross(renderer, p);
	241	// // circle values
	242	// let p = (self.pos + Point::from(ctrl.aim.a) * l).to_i32().into();
	243	// renderer.draw_line(pos, p, (0, 0, 255));
	244	// draw_cross(renderer, p);
	245	}
	246	}
	247
	248	fn draw_cross(renderer: &mut Renderer, p: (i32, i32)) {
	249	renderer.canvas().draw_line((p.0 - 5, p.1), (p.0 + 5, p.1)).unwrap();
	250	renderer.canvas().draw_line((p.0, p.1 - 5), (p.0, p.1 + 5)).unwrap();
	251	}
	252
	253	////////// BOLL ////////////////////////////////////////////////////////////////
	254
	255	pub struct Boll {
	256	pos: Point<f64>,
	257	vel: Point<f64>,
	258	bounces: u8,
	259	}
	260
	261	impl Object for Boll {
	262	fn update(&mut self, objects: &mut Objects, lvl: &Level, _dt: Duration) -> ObjectState {
	263	self.vel += lvl.gravity;
	264	self.pos += self.vel;
	265
	266	let x = (self.pos.x / lvl.grid.cell_size as f64).min(lvl.grid.width as f64 - 1.0).max(0.0) as usize;
	267	let y = (self.pos.y / lvl.grid.cell_size as f64).min(lvl.grid.height as f64 - 1.0).max(0.0) as usize;
	268	if lvl.grid.cells[x][y] {
	269	if self.bounces == 0 {
	270	return Dead
	271	}
	272	self.vel *= -0.25;
	273	self.pos += self.vel;
	274	self.bounces -= 1;
	275	use rand::distributions::{Distribution, Normal};
	276	let mut rng = rand::thread_rng();
	277	let a = Radians(self.vel.to_radians().0 + Normal::new(0.0, 0.75).sample(&mut rng));
	278	objects.push(Box::new(Boll {
	279	vel: Point::from(a) * Normal::new(1.0, 0.25).sample(&mut rng) * self.vel.length(),
	280	..*self
	281	}));
	282	}
	283
	284	Alive
	285	}
	286
	287	fn render(&self, renderer: &mut Renderer, _sprites: &SpriteManager) {
	288	let block = _sprites.get("block");
	289	let size = 4 + self.bounces * 6;
	290	renderer.blit(block, None, Rect::new(self.pos.x as i32 - size as i32 / 2, self.pos.y as i32 - size as i32 / 2, size as u32, size as u32));
	291	// renderer.canvas().set_draw_color((0, self.bounces * 100, 255));
	292	// renderer.canvas().draw_point((self.pos.x as i32, self.pos.y as i32)).unwrap();
	293	}
	294	}