| 1 | use AppState; |
| 2 | use common::Nanoseconds; |
| 3 | use common::Point2D; |
| 4 | use core::controller::Controller; |
| 5 | use core::controller::ControllerManager; |
| 6 | use point; |
| 7 | use sdl2::event::Event; |
| 8 | use sdl2::rect::Rect; |
| 9 | use sdl2::render::Canvas; |
| 10 | use sdl2::video::Window; |
| 11 | use sprites::SpriteManager; |
| 12 | use std::cell::RefCell; |
| 13 | use std::rc::Rc; |
| 14 | |
| 15 | ////////// GAMESTATE /////////////////////////////////////////////////////////// |
| 16 | |
| 17 | #[derive(Default)] |
| 18 | pub struct GameState { |
| 19 | world: World, |
| 20 | } |
| 21 | |
| 22 | impl GameState { |
| 23 | pub fn new() -> Self { |
| 24 | GameState { |
| 25 | world: World::new(), |
| 26 | } |
| 27 | } |
| 28 | } |
| 29 | |
| 30 | impl AppState for GameState { |
| 31 | fn enter(&mut self, ctrl_man: &mut ControllerManager) { |
| 32 | if let Some(ctrl) = ctrl_man.controllers.get(&0) { |
| 33 | self.world.add(Box::new(Character::new(ctrl.clone()))); |
| 34 | } |
| 35 | } |
| 36 | |
| 37 | fn leave(&mut self) {} |
| 38 | |
| 39 | fn update(&mut self, dt: Nanoseconds) { |
| 40 | self.world.update(dt); |
| 41 | } |
| 42 | |
| 43 | fn render(&mut self, canvas: &mut Canvas<Window>, sprites: &mut SpriteManager) { |
| 44 | self.world.render(canvas, sprites); |
| 45 | } |
| 46 | |
| 47 | fn handle_event(&mut self, _event: Event) {} |
| 48 | } |
| 49 | |
| 50 | ////////// WORLD /////////////////////////////////////////////////////////////// |
| 51 | |
| 52 | #[derive(Default)] |
| 53 | pub struct World { |
| 54 | level: Level, |
| 55 | objects: Objects, |
| 56 | } |
| 57 | |
| 58 | impl World { |
| 59 | pub fn new() -> Self { |
| 60 | World { |
| 61 | level: Level { |
| 62 | gravity: point!(0.0, 0.1), |
| 63 | ground: 600.0, |
| 64 | }, |
| 65 | ..Default::default() |
| 66 | } |
| 67 | } |
| 68 | |
| 69 | pub fn update(&mut self, dt: Nanoseconds) { |
| 70 | let mut breeding_ground = vec!(); |
| 71 | |
| 72 | for i in (0..self.objects.len()).rev() { |
| 73 | if self.objects[i].update(&mut breeding_ground, &self.level, dt) == Dead { |
| 74 | self.objects.remove(i); // swap_remove is more efficient, but changes the order of the array |
| 75 | } |
| 76 | } |
| 77 | |
| 78 | for o in breeding_ground { |
| 79 | self.add(o); |
| 80 | } |
| 81 | } |
| 82 | |
| 83 | pub fn render(&mut self, canvas: &mut Canvas<Window>, sprites: &mut SpriteManager) { |
| 84 | self.level.render(canvas, sprites); |
| 85 | for o in &mut self.objects { |
| 86 | o.render(canvas, sprites); |
| 87 | } |
| 88 | } |
| 89 | |
| 90 | pub fn add(&mut self, object: Box<dyn Object>) { |
| 91 | self.objects.push(object); |
| 92 | } |
| 93 | } |
| 94 | |
| 95 | ////////// LEVEL /////////////////////////////////////////////////////////////// |
| 96 | |
| 97 | #[derive(Default)] |
| 98 | pub struct Level { |
| 99 | gravity: Point2D<f64>, |
| 100 | ground: f64, // just to have something |
| 101 | } |
| 102 | |
| 103 | impl Level { |
| 104 | pub fn render(&mut self, canvas: &mut Canvas<Window>, _sprites: &mut SpriteManager) { |
| 105 | let w = canvas.viewport().width() as i32; |
| 106 | for i in 1..11 { |
| 107 | let y = (i * i - 1) as i32 + self.ground as i32; |
| 108 | canvas.set_draw_color((255 - i * 20, 255 - i * 20, 0)); |
| 109 | canvas.draw_line((0, y), (w, y)).unwrap(); |
| 110 | } |
| 111 | } |
| 112 | } |
| 113 | |
| 114 | ////////// OBJECT ////////////////////////////////////////////////////////////// |
| 115 | |
| 116 | type Objects = Vec<Box<dyn Object>>; |
| 117 | |
| 118 | pub trait Object { |
| 119 | fn update(&mut self, objects: &mut Objects, lvl: &Level, dt: Nanoseconds) -> ObjectState; |
| 120 | fn render(&self, _canvas: &mut Canvas<Window>, _sprites: &mut SpriteManager) {} |
| 121 | } |
| 122 | |
| 123 | #[derive(PartialEq)] |
| 124 | pub enum ObjectState { Alive, Dead } |
| 125 | use self::ObjectState::*; |
| 126 | |
| 127 | |
| 128 | pub trait Physical {} |
| 129 | pub trait Drawable {} |
| 130 | |
| 131 | ////////// CHARACTER /////////////////////////////////////////////////////////// |
| 132 | |
| 133 | pub struct Character { |
| 134 | ctrl: Rc<RefCell<Controller>>, |
| 135 | pos: Point2D<f64>, |
| 136 | vel: Point2D<f64>, |
| 137 | } |
| 138 | |
| 139 | impl Character { |
| 140 | pub fn new(ctrl: Rc<RefCell<Controller>>) -> Self { |
| 141 | Character { |
| 142 | ctrl, |
| 143 | pos: point!(100.0, 100.0), |
| 144 | vel: point!(0.0, 0.0), |
| 145 | } |
| 146 | } |
| 147 | } |
| 148 | |
| 149 | impl Object for Character { |
| 150 | fn update(&mut self, objects: &mut Objects, lvl: &Level, _dt: Nanoseconds) -> ObjectState { |
| 151 | self.vel += lvl.gravity; |
| 152 | self.pos += self.vel; |
| 153 | |
| 154 | let ctrl = self.ctrl.borrow(); |
| 155 | |
| 156 | if self.pos.y >= lvl.ground { |
| 157 | self.pos.y = lvl.ground; |
| 158 | self.vel.y = 0.0; |
| 159 | self.vel.x *= 0.9; |
| 160 | |
| 161 | if ctrl.jump.is_pressed { |
| 162 | self.vel = ctrl.aim.to_point() * 5.0; |
| 163 | } |
| 164 | } |
| 165 | |
| 166 | if ctrl.shoot.is_pressed { |
| 167 | use rand::distributions::{Distribution, Normal}; |
| 168 | let normal = Normal::new(0.0, 0.1); |
| 169 | for _i in 0..100 { |
| 170 | objects.push(Box::new(Boll { |
| 171 | pos: self.pos, |
| 172 | vel: ctrl.aim.to_adjusted_point() * (3.0 + rand::random::<f64>()) + point!(normal.sample(&mut rand::thread_rng()), normal.sample(&mut rand::thread_rng())) + self.vel, |
| 173 | bounces: 2, |
| 174 | })); |
| 175 | } |
| 176 | ctrl.rumble(1.0, _dt as u32 / 1_000_000); |
| 177 | } |
| 178 | |
| 179 | match ctrl.mov.x { |
| 180 | v if v < -0.9 => { self.vel.x -= 0.5 } |
| 181 | v if v > 0.9 => { self.vel.x += 0.5 } |
| 182 | _ => {} |
| 183 | } |
| 184 | |
| 185 | Alive |
| 186 | } |
| 187 | |
| 188 | fn render(&self, canvas: &mut Canvas<Window>, sprites: &mut SpriteManager) { |
| 189 | let block = sprites.get("mario"); |
| 190 | let size = 32; |
| 191 | canvas.copy(block, None, Rect::new(self.pos.x as i32 - size as i32 / 2, self.pos.y as i32 - size as i32, size, size)).unwrap(); |
| 192 | |
| 193 | let ctrl = &self.ctrl.borrow(); |
| 194 | let l = 300.0; |
| 195 | let pos = (self.pos.x as i32, self.pos.y as i32); |
| 196 | // axis values |
| 197 | let p = (self.pos + ctrl.aim.to_point() * l).to_i32().into(); |
| 198 | canvas.set_draw_color((0, 255, 0)); |
| 199 | canvas.draw_line(pos, p).unwrap(); |
| 200 | draw_cross(canvas, p); |
| 201 | // adjusted values |
| 202 | let p = (self.pos + ctrl.aim.to_adjusted_point() * l).to_i32().into(); |
| 203 | canvas.set_draw_color((255, 0, 0)); |
| 204 | canvas.draw_line(pos, p).unwrap(); |
| 205 | draw_cross(canvas, p); |
| 206 | // circle values |
| 207 | let p = (self.pos + Point2D::from(ctrl.aim.a) * l).to_i32().into(); |
| 208 | canvas.set_draw_color((0, 0, 255)); |
| 209 | canvas.draw_line(pos, p).unwrap(); |
| 210 | draw_cross(canvas, p); |
| 211 | } |
| 212 | } |
| 213 | |
| 214 | fn draw_cross(canvas: &mut Canvas<Window>, p: (i32, i32)) { |
| 215 | canvas.draw_line((p.0 - 5, p.1), (p.0 + 5, p.1)).unwrap(); |
| 216 | canvas.draw_line((p.0, p.1 - 5), (p.0, p.1 + 5)).unwrap(); |
| 217 | } |
| 218 | |
| 219 | pub struct Boll { |
| 220 | pos: Point2D<f64>, |
| 221 | vel: Point2D<f64>, |
| 222 | bounces: u8, |
| 223 | } |
| 224 | |
| 225 | impl Object for Boll { |
| 226 | fn update(&mut self, _objects: &mut Objects, lvl: &Level, _dt: Nanoseconds) -> ObjectState { |
| 227 | self.vel += lvl.gravity; |
| 228 | self.pos += self.vel; |
| 229 | |
| 230 | if self.pos.y >= lvl.ground { |
| 231 | if self.bounces == 0 { |
| 232 | return Dead |
| 233 | } else { |
| 234 | self.bounces -= 1; |
| 235 | self.pos.y = lvl.ground; |
| 236 | self.vel.y = -self.vel.y; |
| 237 | } |
| 238 | } |
| 239 | |
| 240 | Alive |
| 241 | } |
| 242 | |
| 243 | fn render(&self, canvas: &mut Canvas<Window>, _sprites: &mut SpriteManager) { |
| 244 | let block = _sprites.get("block"); |
| 245 | let size = 4 + self.bounces * 6; |
| 246 | canvas.copy(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)).unwrap(); |
| 247 | // canvas.set_draw_color((0, self.bounces * 100, 255)); |
| 248 | // canvas.draw_point((self.pos.x as i32, self.pos.y as i32)).unwrap(); |
| 249 | } |
| 250 | } |