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use super::constants;
use super::player;
pub trait StraightBullet: Positioned + Drawable {
fn real_x(&self) -> f64;
fn real_y(&self) -> f64;
fn set_real_x(&mut self, real_x: f64);
fn set_real_y(&mut self, real_y: f64);
fn d_x(&self) -> f64;
fn d_y(&self) -> f64;
}
pub struct PBullet {
real_x: f64,
real_y: f64,
d_x: f64,
d_y: f64,
}
impl StraightBullet for PBullet {
fn real_x(&self) -> f64 {
self.real_x
}
fn real_y(&self) -> f64 {
self.real_y
}
fn set_real_x(&mut self, real_x: f64) {
self.real_x = real_x;
}
fn set_real_y(&mut self, real_y: f64) {
self.real_y = real_y;
}
fn d_x(&self) -> f64 {
self.d_x
}
fn d_y(&self) -> f64 {
self.d_y
}
}
pub trait Bullet: Positioned + Drawable {
fn act(&mut self);
fn delete(&mut self);
}
impl<T: StraightBullet> Bullet for T {
fn act(&mut self) {
let real_x = self.real_x();
let d_x = self.d_x();
self.set_real_x(real_x + d_x);
let real_y = self.real_y();
let d_y = self.d_y();
self.set_real_y(real_y + d_y);
}
fn delete(&mut self) {
/* TODO: maybe a more robust way of deleting */
self.set_real_x(-1000.);
}
}
impl PBullet {
pub fn new(x: i32, d_x: f64, y: i32, d_y: f64) -> PBullet {
PBullet {
real_x: x as f64,
real_y: y as f64,
d_x: d_x,
d_y: d_y,
}
}
pub fn damage() -> f64 {
0.01
}
}
pub trait Enemy<T>: Drawable {
fn new() -> Self;
fn act(&mut self, count: u64) -> Vec<T>;
fn health(&self) -> f64;
fn set_health(&mut self, health: f64);
fn injure(&mut self, damage: f64);
}
pub struct State<T, U> {
pub player: player::Player,
pub enemies: Vec<T>,
pub bullets: Vec<U>,
pub player_bullets: Vec<PBullet>,
pub count: u64,
}
impl<T: Enemy<U>, U> State<T, U> {
pub fn new() -> State<T, U> {
State {
player: player::Player::new(),
enemies: vec![T::new()],
bullets: Vec::new(),
count: 0,
player_bullets: Vec::new(),
}
}
}
fn dist(x1: i32, y1: i32, x2: i32, y2: i32) -> f64 {
let xdist = x1 - x2;
let ydist = y1 - y2;
f64::sqrt((xdist * xdist + ydist * ydist) as f64)
}
pub trait Positioned {
fn x(&self) -> i32;
fn y(&self) -> i32;
fn radius() -> u32;
fn contains(&self, x: i32, y: i32) -> bool {
let d = dist(self.x(), self.y(), x, y);
d <= Self::radius() as f64
}
fn overlaps<T: Positioned>(&self, other: &T) -> bool {
let sx = self.x();
let ox = other.x();
let sy = self.y();
let oy = other.y();
let threshold = Self::radius() + T::radius();
if (sx - ox).abs() as u32 >= threshold || (sy - oy).abs() as u32 >= threshold {
return false;
}
let dist = dist(sx, sy, ox, oy);
dist < threshold as f64
}
fn outside(&self) -> bool {
let x = self.x();
let y = self.y();
x < -100
|| x > constants::X_DIM as i32 + 100
|| y < -100
|| y > constants::Y_DIM as i32 + 100
}
}
impl Positioned for PBullet {
fn x(&self) -> i32 {
self.real_x.round() as i32
}
fn y(&self) -> i32 {
self.real_y.round() as i32
}
fn radius() -> u32 {
10
}
}
pub trait Drawable: Positioned {
fn center() -> (u32, u32);
fn draw(&self, canvas: &mut sdl2::render::WindowCanvas, texture: &sdl2::render::Texture) {
let tw = texture.query().width;
let th = texture.query().height;
let (cx, cy) = Self::center();
let x0 = self.x() - cx as i32;
let y0 = self.y() - cy as i32;
canvas
.copy(&texture, None, Some(sdl2::rect::Rect::new(x0, y0, tw, th)))
.unwrap();
}
}
impl Drawable for PBullet {
fn center() -> (u32, u32) {
(16, 22)
}
}
|
