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

use AppState;
use core::app::StateChange;
use core::controller::Controller;
use core::controller::ControllerManager;
use core::level::{Level, LevelGenerator, Wall, IntersectResult::Intersection};
use core::render::Renderer;
use geometry::{Point, ToAngle};
use point;
use sdl2::event::Event;
use sdl2::keyboard::Keycode;
use sdl2::rect::Rect;
use sprites::SpriteManager;
use std::cell::RefCell;
use std::rc::Rc;
use teststate::TestState;
use time::Duration;

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

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

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

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, self.debug_mode);
    }

    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(TestState::new())))
            }
	    Event::KeyDown { keycode: Some(Keycode::KpEnter), .. } => {
		self.debug_mode = !self.debug_mode;
	    }
	    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;
		self.world.level = self.lvlgen.generate();
	    }
	    Event::KeyDown { keycode: Some(Keycode::KpMinus), .. } => {
		if self.lvlgen.iterations > 0 {
		    self.lvlgen.iterations -= 1;
		    self.world.level = self.lvlgen.generate();
		}
	    }
	    Event::KeyDown { keycode: Some(Keycode::KpMultiply), .. } => {
		self.lvlgen.wall_smooth_radius += 1;
		self.world.level = self.lvlgen.generate();
	    }
	    Event::KeyDown { keycode: Some(Keycode::KpDivide), .. } => {
		if self.lvlgen.wall_smooth_radius > 0 {
		    self.lvlgen.wall_smooth_radius -= 1;
		    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, debug_mode: bool) {
	self.level.render(renderer, sprites, debug_mode);
	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>,
    standing_on: Option<Wall>,
}

impl Character {
    pub fn new(ctrl: Rc<RefCell<Controller>>) -> Self {
	Character {
	    ctrl,
	    pos: point!(300.0, 300.0),
	    vel: point!(0.0, 0.0),
	    standing_on: None,
	}
    }
}

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

	match &self.standing_on {
	    Some(wall) => {
		if ctrl.jump.is_pressed && !ctrl.jump.was_pressed {
		    if ctrl.mov.to_point().length() < 0.1 {
			self.vel = wall.normal().into();
		    } else {
			self.vel = ctrl.mov.to_point();
		    }
		    self.vel *= 5.0;
		    self.pos += self.vel * 0.1;
		    self.standing_on = None;
		} else {
		    self.vel *= 0.9;
		}
	    },
	    None => {
		self.vel += lvl.gravity;
		self.pos += self.vel;

		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 }
		    _ => {}
		}

		if let Intersection(wall, pos) = lvl.intersect_walls(self.pos - self.vel, self.pos) {
		    self.standing_on = Some(wall);
		    self.pos = pos;
		    self.vel = point!(0.0, 0.0);
		}
	    }
	}

	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 + point!(0.0, -16.0), // half the height of mario
		    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;
	}

	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;

	if let Intersection(wall, pos) = lvl.intersect_walls(self.pos - self.vel, self.pos) {
	    if self.bounces == 0 {
		return Dead
	    }
	    self.bounces -= 1;
	    let mut a = wall.normal().mirror(self.vel.to_angle()); // TODO interpolera normalen mellan närliggande väggdelar? bollarna studsar väldigt "kantigt" nu
	    self.pos = pos + Point::from(wall.normal()) * 0.1; // får bollen att inte åka igenom väggen av misstag p.g.a nedan slumpvinkel
	    self.vel = Point::from(a) * self.vel.length() * 0.35;

	    // create another boll
	    use rand::distributions::{Distribution, Normal};
	    let mut rng = rand::thread_rng();
	    a += Normal::new(0.0, 0.1).sample(&mut rng).radians(); // TODO slumpen kan ge en vinkel som är under tangenten. vinkel-metoder på väggen istället kanske?
	    use rand::Rng;
	    objects.push(Box::new(Boll {
	    	vel: Point::from(a) * Normal::new(1.0, 0.25).sample(&mut rng) * self.vel.length() * rng.gen_range(0.25, 1.0),
	    	..*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 AppState;
	2	use core::app::StateChange;
	3	use core::controller::Controller;
	4	use core::controller::ControllerManager;
	5	use core::level::{Level, LevelGenerator, Wall, IntersectResult::Intersection};
	6	use core::render::Renderer;
	7	use geometry::{Point, ToAngle};
	8	use point;
	9	use sdl2::event::Event;
	10	use sdl2::keyboard::Keycode;
	11	use sdl2::rect::Rect;
	12	use sprites::SpriteManager;
	13	use std::cell::RefCell;
	14	use std::rc::Rc;
	15	use teststate::TestState;
	16	use time::Duration;
	17
	18	////////// GAMESTATE ///////////////////////////////////////////////////////////
	19
	20	#[derive(Default)]
	21	pub struct GameState {
	22	world: World,
	23	lvlgen: LevelGenerator,
	24	debug_mode: bool,
	25	}
	26
	27	impl GameState {
	28	pub fn new() -> Self {
	29	let lvlgen = LevelGenerator::new(0);
	30	GameState {
	31	world: World::new(lvlgen.generate()),
	32	lvlgen,
	33	..Default::default()
	34	}
	35	}
	36	}
	37
	38	impl AppState for GameState {
	39	fn enter(&mut self, ctrl_man: &ControllerManager) {
	40	for (_k, v) in ctrl_man.controllers.iter() {
	41	self.world.add(Box::new(Character::new(v.clone())));
	42	}
	43	}
	44
	45	fn leave(&mut self) {}
	46
	47	fn update(&mut self, dt: Duration) -> Option<StateChange> {
	48	self.world.update(dt);
	49	None
	50	}
	51
	52	fn render(&mut self, renderer: &mut Renderer, sprites: &SpriteManager) {
	53	self.world.render(renderer, sprites, self.debug_mode);
	54	}
	55
	56	fn handle_event(&mut self, event: Event) -> Option<StateChange> {
	57	match event {
	58	Event::KeyDown { keycode: Some(Keycode::Escape), .. } => {
	59	return Some(StateChange::Pop)
	60	}
	61	Event::KeyDown { keycode: Some(Keycode::Return), .. } => {
	62	return Some(StateChange::Push(Box::new(TestState::new())))
	63	}
	64	Event::KeyDown { keycode: Some(Keycode::KpEnter), .. } => {
	65	self.debug_mode = !self.debug_mode;
	66	}
	67	Event::KeyDown { keycode: Some(Keycode::Space), .. } => {
	68	self.lvlgen.seed = std::time::UNIX_EPOCH.elapsed().unwrap().as_secs() as u32;
	69	self.world.level = self.lvlgen.generate();
	70	}
	71	Event::KeyDown { keycode: Some(Keycode::KpPlus), .. } => {
	72	self.lvlgen.iterations += 1;
	73	self.world.level = self.lvlgen.generate();
	74	}
	75	Event::KeyDown { keycode: Some(Keycode::KpMinus), .. } => {
	76	if self.lvlgen.iterations > 0 {
	77	self.lvlgen.iterations -= 1;
	78	self.world.level = self.lvlgen.generate();
	79	}
	80	}
	81	Event::KeyDown { keycode: Some(Keycode::KpMultiply), .. } => {
	82	self.lvlgen.wall_smooth_radius += 1;
	83	self.world.level = self.lvlgen.generate();
	84	}
	85	Event::KeyDown { keycode: Some(Keycode::KpDivide), .. } => {
	86	if self.lvlgen.wall_smooth_radius > 0 {
	87	self.lvlgen.wall_smooth_radius -= 1;
	88	self.world.level = self.lvlgen.generate();
	89	}
	90	}
	91	_ => {}
	92	}
	93	None
	94	}
	95	}
	96
	97	////////// WORLD ///////////////////////////////////////////////////////////////
	98
	99	#[derive(Default)]
	100	pub struct World {
	101	level: Level,
	102	objects: Objects,
	103	}
	104
	105	impl World {
	106	pub fn new(level: Level) -> Self {
	107	World {
	108	level,
	109	..Default::default()
	110	}
	111	}
	112
	113	pub fn update(&mut self, dt: Duration) {
	114	let mut breeding_ground = vec!();
	115
	116	for i in (0..self.objects.len()).rev() {
	117	if self.objects[i].update(&mut breeding_ground, &self.level, dt) == Dead {
	118	self.objects.remove(i); // swap_remove is more efficient, but changes the order of the array
	119	}
	120	}
	121
	122	for o in breeding_ground {
	123	self.add(o);
	124	}
	125
	126	println!("\x1b[Kobject count: {}\x1b[1A", self.objects.len()); // clear line, print, move cursor up
	127	}
	128
	129	pub fn render(&mut self, renderer: &mut Renderer, sprites: &SpriteManager, debug_mode: bool) {
	130	self.level.render(renderer, sprites, debug_mode);
	131	for o in &mut self.objects {
	132	o.render(renderer, sprites);
	133	}
	134	}
	135
	136	pub fn add(&mut self, object: Box<dyn Object>) {
	137	self.objects.push(object);
	138	}
	139	}
	140
	141	////////// OBJECT //////////////////////////////////////////////////////////////
	142
	143	type Objects = Vec<Box<dyn Object>>;
	144
	145	pub trait Object {
	146	fn update(&mut self, objects: &mut Objects, lvl: &Level, dt: Duration) -> ObjectState;
	147	fn render(&self, _renderer: &mut Renderer, _sprites: &SpriteManager) {}
	148	}
	149
	150	#[derive(PartialEq)]
	151	pub enum ObjectState { Alive, Dead }
	152	use self::ObjectState::*;
	153
	154
	155	pub trait Physical {}
	156	pub trait Drawable {}
	157
	158	////////// CHARACTER ///////////////////////////////////////////////////////////
	159
	160	pub struct Character {
	161	ctrl: Rc<RefCell<Controller>>,
	162	pos: Point<f64>,
	163	vel: Point<f64>,
	164	standing_on: Option<Wall>,
	165	}
	166
	167	impl Character {
	168	pub fn new(ctrl: Rc<RefCell<Controller>>) -> Self {
	169	Character {
	170	ctrl,
	171	pos: point!(300.0, 300.0),
	172	vel: point!(0.0, 0.0),
	173	standing_on: None,
	174	}
	175	}
	176	}
	177
	178	impl Object for Character {
	179	fn update(&mut self, objects: &mut Objects, lvl: &Level, dt: Duration) -> ObjectState {
	180	let ctrl = self.ctrl.borrow();
	181
	182	match &self.standing_on {
	183	Some(wall) => {
	184	if ctrl.jump.is_pressed && !ctrl.jump.was_pressed {
	185	if ctrl.mov.to_point().length() < 0.1 {
	186	self.vel = wall.normal().into();
	187	} else {
	188	self.vel = ctrl.mov.to_point();
	189	}
	190	self.vel *= 5.0;
	191	self.pos += self.vel * 0.1;
	192	self.standing_on = None;
	193	} else {
	194	self.vel *= 0.9;
	195	}
	196	},
	197	None => {
	198	self.vel += lvl.gravity;
	199	self.pos += self.vel;
	200
	201	match ctrl.mov.x {
	202	v if v < -0.9 && self.vel.x > -5.0 => { self.vel.x -= 0.5 }
	203	v if v > 0.9 && self.vel.x < 5.0 => { self.vel.x += 0.5 }
	204	_ => {}
	205	}
	206
	207	if let Intersection(wall, pos) = lvl.intersect_walls(self.pos - self.vel, self.pos) {
	208	self.standing_on = Some(wall);
	209	self.pos = pos;
	210	self.vel = point!(0.0, 0.0);
	211	}
	212	}
	213	}
	214
	215	if ctrl.shoot.is_pressed {
	216	use rand::distributions::{Distribution, Normal};
	217	let normal = Normal::new(0.0, 0.1);
	218	let direction = if ctrl.aim.to_point().length() > 0.1 { ctrl.aim.to_point() } else { ctrl.mov.to_point() };
	219	for _i in 0..100 {
	220	objects.push(Box::new(Boll {
	221	pos: self.pos + point!(0.0, -16.0), // half the height of mario
	222	vel: direction * (10.0 + rand::random::<f64>()) + point!(normal.sample(&mut rand::thread_rng()), normal.sample(&mut rand::thread_rng())) + self.vel,
	223	bounces: 2,
	224	}));
	225	}
	226	ctrl.rumble(1.0, dt);
	227	self.vel -= direction * 0.1;
	228	}
	229
	230	Alive
	231	}
	232
	233	fn render(&self, renderer: &mut Renderer, sprites: &SpriteManager) {
	234	let block = sprites.get("mario");
	235	let size = 32;
	236	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));
	237
	238	let ctrl = &self.ctrl.borrow();
	239	let l = 300.0;
	240	let pos = (self.pos.x as i32, self.pos.y as i32);
	241	// // axis values
	242	// let p = (self.pos + ctrl.aim.to_axis_point() * l).to_i32().into();
	243	// renderer.draw_line(pos, p, (0, 255, 0));
	244	// draw_cross(renderer, p);
	245	// values limited to unit vector
	246	let p = (self.pos + ctrl.aim.to_point() * l).to_i32().into();
	247	renderer.draw_line(pos, p, (255, 0, 0));
	248	draw_cross(renderer, p);
	249	let p = (self.pos + ctrl.mov.to_point() * l).to_i32().into();
	250	renderer.draw_line(pos, p, (0, 255, 0));
	251	draw_cross(renderer, p);
	252	// // circle values
	253	// let p = (self.pos + Point::from(ctrl.aim.a) * l).to_i32().into();
	254	// renderer.draw_line(pos, p, (0, 0, 255));
	255	// draw_cross(renderer, p);
	256	}
	257	}
	258
	259	fn draw_cross(renderer: &mut Renderer, p: (i32, i32)) {
	260	renderer.canvas().draw_line((p.0 - 5, p.1), (p.0 + 5, p.1)).unwrap();
	261	renderer.canvas().draw_line((p.0, p.1 - 5), (p.0, p.1 + 5)).unwrap();
	262	}
	263
	264	////////// BOLL ////////////////////////////////////////////////////////////////
	265
	266	pub struct Boll {
	267	pos: Point<f64>,
	268	vel: Point<f64>,
	269	bounces: u8,
	270	}
	271
	272	impl Object for Boll {
	273	fn update(&mut self, objects: &mut Objects, lvl: &Level, _dt: Duration) -> ObjectState {
	274	self.vel += lvl.gravity;
	275	self.pos += self.vel;
	276
	277	if let Intersection(wall, pos) = lvl.intersect_walls(self.pos - self.vel, self.pos) {
	278	if self.bounces == 0 {
	279	return Dead
	280	}
	281	self.bounces -= 1;
	282	let mut a = wall.normal().mirror(self.vel.to_angle()); // TODO interpolera normalen mellan närliggande väggdelar? bollarna studsar väldigt "kantigt" nu
	283	self.pos = pos + Point::from(wall.normal()) * 0.1; // får bollen att inte åka igenom väggen av misstag p.g.a nedan slumpvinkel
	284	self.vel = Point::from(a) * self.vel.length() * 0.35;
	285
	286	// create another boll
	287	use rand::distributions::{Distribution, Normal};
	288	let mut rng = rand::thread_rng();
	289	a += Normal::new(0.0, 0.1).sample(&mut rng).radians(); // TODO slumpen kan ge en vinkel som är under tangenten. vinkel-metoder på väggen istället kanske?
	290	use rand::Rng;
	291	objects.push(Box::new(Boll {
	292	vel: Point::from(a) * Normal::new(1.0, 0.25).sample(&mut rng) * self.vel.length() * rng.gen_range(0.25, 1.0),
	293	..*self
	294	}));
	295	}
	296
	297	Alive
	298	}
	299
	300	fn render(&self, renderer: &mut Renderer, _sprites: &SpriteManager) {
	301	let block = _sprites.get("block");
	302	let size = 4 + self.bounces * 6;
	303	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));
	304	// renderer.canvas().set_draw_color((0, self.bounces * 100, 255));
	305	// renderer.canvas().draw_point((self.pos.x as i32, self.pos.y as i32)).unwrap();
	306	}
	307	}