Added basic working code
parent
bd138d3db3
commit
f5f52e7e75
GPG Key ID:
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[package]
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edition = "2021"
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[dependencies]
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[dependencies.sdl2]
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default-features = false
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#features = ["ttf"]
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@ -0,0 +1,74 @@
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use sdl2::rect::{Point, Rect};
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use sdl2::render::Canvas;
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use sdl2::video::Window;
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use crate::physics::PhysVec;
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use crate::Camera;
|
||||
use crate::Drawable;
|
||||
use crate::SpriteAtlas;
|
||||
|
||||
pub struct Doodad {
|
||||
sprite: String,
|
||||
pos: PhysVec,
|
||||
scale: u32,
|
||||
}
|
||||
|
||||
impl Doodad {
|
||||
pub fn new(pos: PhysVec) -> Self {
|
||||
Doodad {
|
||||
sprite: "a0.png".to_owned(),
|
||||
pos,
|
||||
scale: 1,
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
impl Drawable for Doodad {
|
||||
fn position(&self) -> PhysVec {
|
||||
self.pos
|
||||
}
|
||||
|
||||
fn draw(
|
||||
&self,
|
||||
canvas: &mut Canvas<Window>,
|
||||
sa: &SpriteAtlas,
|
||||
c: &Camera,
|
||||
) -> Result<(), String> {
|
||||
let win_size = PhysVec::from(canvas.window().size());
|
||||
let draw_pos = self.screen_position(canvas, &c);
|
||||
|
||||
// Don't draw if off screen
|
||||
if draw_pos.x < 0.0
|
||||
|| draw_pos.x > win_size.x
|
||||
|| draw_pos.y < 0.0
|
||||
|| draw_pos.y > win_size.y
|
||||
{
|
||||
return Ok(());
|
||||
}
|
||||
|
||||
let sprite = sa.get(&self.sprite);
|
||||
|
||||
let mut dest_rect_0 = Rect::new(0, 0, 112 / self.scale, 112 / self.scale);
|
||||
dest_rect_0.center_on(Point::new(
|
||||
112 / (2 * self.scale) as i32,
|
||||
112 / (2 * self.scale) as i32,
|
||||
));
|
||||
|
||||
// set the current frame for time
|
||||
dest_rect_0.set_x(draw_pos.x.round() as i32);
|
||||
dest_rect_0.set_y(draw_pos.y.round() as i32);
|
||||
|
||||
// copy the frame to the canvas
|
||||
canvas.copy_ex(
|
||||
&sprite.texture,
|
||||
Some(sprite.rect),
|
||||
Some(dest_rect_0),
|
||||
0.0, // angle
|
||||
Point::new(120 / (2 * self.scale) as i32, 270 / (2 * self.scale) as i32), // center
|
||||
false,
|
||||
false,
|
||||
)?;
|
||||
|
||||
return Ok(());
|
||||
}
|
||||
}
|
||||
|
|
@ -0,0 +1,48 @@
|
|||
use sdl2::{event::Event, keyboard::Keycode};
|
||||
|
||||
// TODO: no boolean modification (no pub)
|
||||
pub struct InputStatus {
|
||||
pub key_left: bool,
|
||||
pub key_right: bool,
|
||||
pub key_thrust: bool,
|
||||
}
|
||||
|
||||
impl InputStatus {
|
||||
pub fn new() -> Self {
|
||||
InputStatus {
|
||||
key_left: false,
|
||||
key_right: false,
|
||||
key_thrust: false,
|
||||
}
|
||||
}
|
||||
|
||||
fn handle_keyup(&mut self, keycode: Keycode) {
|
||||
match keycode {
|
||||
Keycode::Left => self.key_left = false,
|
||||
Keycode::Right => self.key_right = false,
|
||||
Keycode::Up => self.key_thrust = false,
|
||||
_ => {}
|
||||
}
|
||||
}
|
||||
|
||||
fn handle_keydown(&mut self, keycode: Keycode) {
|
||||
match keycode {
|
||||
Keycode::Left => self.key_left = true,
|
||||
Keycode::Right => self.key_right = true,
|
||||
Keycode::Up => self.key_thrust = true,
|
||||
_ => {}
|
||||
}
|
||||
}
|
||||
|
||||
pub fn update(&mut self, event: Event) {
|
||||
match event {
|
||||
Event::KeyDown {
|
||||
keycode: Some(key), ..
|
||||
} => self.handle_keydown(key),
|
||||
Event::KeyUp {
|
||||
keycode: Some(key), ..
|
||||
} => self.handle_keyup(key),
|
||||
_ => {}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
|
@ -0,0 +1,175 @@
|
|||
use sdl2::{event::Event, keyboard::Keycode, render::Canvas, video::Window};
|
||||
use std::{time::Duration, time::Instant};
|
||||
|
||||
mod doodad;
|
||||
mod inputstatus;
|
||||
mod physics;
|
||||
mod ship;
|
||||
mod spriteatlas;
|
||||
|
||||
use crate::doodad::Doodad;
|
||||
use crate::inputstatus::InputStatus;
|
||||
use crate::physics::PhysVec;
|
||||
use crate::ship::Ship;
|
||||
use crate::spriteatlas::SpriteAtlas;
|
||||
|
||||
trait Drawable {
|
||||
/// Return the world position of this object
|
||||
fn position(&self) -> PhysVec;
|
||||
|
||||
/// Get the position of this drawable on the screen
|
||||
/// (0, 0) is at top-left corner.
|
||||
///
|
||||
/// Returned position is this object's center.
|
||||
fn screen_position(&self, canvas: &mut Canvas<Window>, c: &Camera) -> PhysVec {
|
||||
let win_size = PhysVec::from(canvas.window().size());
|
||||
let h = win_size / 2.0;
|
||||
return self.position() - c.pos + h;
|
||||
}
|
||||
|
||||
// Draw this item on the screen
|
||||
fn draw(&self, canvas: &mut Canvas<Window>, sa: &SpriteAtlas, c: &Camera)
|
||||
-> Result<(), String>;
|
||||
}
|
||||
|
||||
enum ShipKind {
|
||||
Gypsum,
|
||||
}
|
||||
|
||||
impl ShipKind {
|
||||
fn sprite(&self) -> &'static str {
|
||||
match self {
|
||||
Self::Gypsum => "gypsum.png",
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
struct Camera {
|
||||
pos: PhysVec,
|
||||
}
|
||||
|
||||
impl Camera {
|
||||
fn new() -> Self {
|
||||
Camera {
|
||||
pos: PhysVec::zero(),
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
static FTL: f64 = 1.0 / 140.0; // frame time limit
|
||||
|
||||
struct System {
|
||||
decor: Vec<Box<dyn Drawable>>,
|
||||
}
|
||||
|
||||
impl System {
|
||||
fn new() -> Self {
|
||||
let mut s = System { decor: Vec::new() };
|
||||
|
||||
s.decor.push(Box::new(Doodad::new(PhysVec::zero())));
|
||||
s.decor
|
||||
.push(Box::new(Doodad::new(PhysVec { x: 100.0, y: 23.0 })));
|
||||
|
||||
return s;
|
||||
}
|
||||
|
||||
fn draw(
|
||||
&self,
|
||||
canvas: &mut Canvas<Window>,
|
||||
sa: &SpriteAtlas,
|
||||
c: &Camera,
|
||||
) -> Result<(), String> {
|
||||
for d in &self.decor {
|
||||
d.draw(canvas, sa, c)?
|
||||
}
|
||||
|
||||
return Ok(());
|
||||
}
|
||||
}
|
||||
|
||||
fn main() -> Result<(), String> {
|
||||
let sdl_context = sdl2::init()?;
|
||||
let video_subsystem = sdl_context.video()?;
|
||||
|
||||
let window = video_subsystem
|
||||
.window("SDL2", 640, 480)
|
||||
.position_centered()
|
||||
.resizable()
|
||||
.build()
|
||||
.map_err(|e| e.to_string())?;
|
||||
|
||||
let mut canvas = window
|
||||
.into_canvas()
|
||||
.accelerated()
|
||||
.build()
|
||||
.map_err(|e| e.to_string())?;
|
||||
let texture_creator = canvas.texture_creator();
|
||||
|
||||
let sa = SpriteAtlas::new(&texture_creator)?;
|
||||
let mut event_pump = sdl_context.event_pump()?;
|
||||
|
||||
let system = System::new();
|
||||
|
||||
let mut i = InputStatus::new();
|
||||
let mut c = Camera::new();
|
||||
|
||||
let mut s = Ship::new(ShipKind::Gypsum);
|
||||
|
||||
//let mut last_frame_time = 0f64;
|
||||
let mut frame_start;
|
||||
|
||||
let mut running = true;
|
||||
while running {
|
||||
frame_start = Instant::now();
|
||||
|
||||
for event in event_pump.poll_iter() {
|
||||
match event {
|
||||
Event::Quit { .. }
|
||||
| Event::KeyDown {
|
||||
keycode: Some(Keycode::Escape),
|
||||
..
|
||||
} => {
|
||||
running = false;
|
||||
}
|
||||
_ => i.update(event),
|
||||
}
|
||||
}
|
||||
|
||||
c.pos = s.body.pos;
|
||||
|
||||
// Draw
|
||||
canvas.clear();
|
||||
system.draw(&mut canvas, &sa, &c)?;
|
||||
s.draw(&mut canvas, &sa, &c)?;
|
||||
canvas.present();
|
||||
|
||||
let frame_time = frame_start.elapsed().as_secs_f64();
|
||||
|
||||
// Wait
|
||||
// (limit frame rate)
|
||||
if frame_time < FTL {
|
||||
std::thread::sleep(Duration::from_secs_f64(FTL - frame_time));
|
||||
}
|
||||
|
||||
// Apply input
|
||||
|
||||
let frame_time = frame_start.elapsed().as_secs_f64();
|
||||
//last_frame_time = frame_time;
|
||||
|
||||
s.body.tick(frame_time);
|
||||
|
||||
if i.key_thrust {
|
||||
s.body.thrust(50.0 * frame_time);
|
||||
}
|
||||
|
||||
if i.key_right {
|
||||
s.body.rot(-1.0 * frame_time);
|
||||
}
|
||||
|
||||
if i.key_left {
|
||||
s.body.rot(1.0 * frame_time);
|
||||
}
|
||||
}
|
||||
|
||||
Ok(())
|
||||
}
|
||||
|
|
@ -0,0 +1,75 @@
|
|||
use sdl2::rect::{Point, Rect};
|
||||
use sdl2::render::Canvas;
|
||||
use sdl2::video::Window;
|
||||
|
||||
use crate::physics::PhysBody;
|
||||
use crate::physics::PhysVec;
|
||||
use crate::Camera;
|
||||
use crate::Drawable;
|
||||
use crate::ShipKind;
|
||||
use crate::SpriteAtlas;
|
||||
|
||||
pub struct Ship {
|
||||
pub body: PhysBody,
|
||||
kind: ShipKind,
|
||||
scale: u32,
|
||||
}
|
||||
|
||||
impl Ship {
|
||||
pub fn new(kind: ShipKind) -> Self {
|
||||
Ship {
|
||||
body: PhysBody::new(),
|
||||
kind,
|
||||
scale: 2,
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
impl Drawable for Ship {
|
||||
fn position(&self) -> PhysVec {
|
||||
return self.body.pos;
|
||||
}
|
||||
|
||||
fn draw(
|
||||
&self,
|
||||
canvas: &mut Canvas<Window>,
|
||||
sa: &SpriteAtlas,
|
||||
c: &Camera,
|
||||
) -> Result<(), String> {
|
||||
let win_size = PhysVec::from(canvas.window().size());
|
||||
let draw_pos = self.screen_position(canvas, &c);
|
||||
// Don't draw if off screen
|
||||
if draw_pos.x < 0.0
|
||||
|| draw_pos.x > win_size.x
|
||||
|| draw_pos.y < 0.0
|
||||
|| draw_pos.y > win_size.y
|
||||
{
|
||||
return Ok(());
|
||||
}
|
||||
|
||||
let sprite = sa.get(self.kind.sprite());
|
||||
|
||||
let mut dest_rect_0 = Rect::new(0, 0, 120 / self.scale, 270 / self.scale);
|
||||
dest_rect_0.center_on(Point::new(
|
||||
120 / (2 * self.scale) as i32,
|
||||
270 / (2 * self.scale) as i32,
|
||||
));
|
||||
|
||||
// set the current frame for time
|
||||
dest_rect_0.set_x(draw_pos.x.round() as i32);
|
||||
dest_rect_0.set_y(draw_pos.y.round() as i32);
|
||||
|
||||
// copy the frame to the canvas
|
||||
canvas.copy_ex(
|
||||
&sprite.texture,
|
||||
Some(sprite.rect),
|
||||
Some(dest_rect_0),
|
||||
self.body.angle.to_degrees(), // angle
|
||||
Point::new(120 / (2 * self.scale) as i32, 270 / (2 * self.scale) as i32), // center
|
||||
false,
|
||||
false,
|
||||
)?;
|
||||
|
||||
return Ok(());
|
||||
}
|
||||
}
|
||||
|
|
@ -0,0 +1,73 @@
|
|||
use image::io::Reader as ImageReader;
|
||||
use sdl2::{
|
||||
rect::Rect,
|
||||
render::{Texture, TextureCreator},
|
||||
video::WindowContext,
|
||||
};
|
||||
|
||||
use std::collections::HashMap;
|
||||
|
||||
/// A handle for a sprite inside a SpriteAtlas
|
||||
pub struct Sprite<'a> {
|
||||
pub texture: &'a Texture<'a>,
|
||||
pub rect: Rect,
|
||||
}
|
||||
|
||||
/// A cache of textures we use when drawing the screen.
|
||||
///
|
||||
/// This is implemented very carefully, since SDL2 textures have tricky lifetimes.
|
||||
pub struct SpriteAtlas<'a> {
|
||||
data: HashMap<String, (Texture<'a>, Rect)>,
|
||||
}
|
||||
|
||||
impl<'a> SpriteAtlas<'a> {
|
||||
pub fn new(texture_creator: &'a TextureCreator<WindowContext>) -> Result<Self, String> {
|
||||
let mut b = Self {
|
||||
data: HashMap::new(),
|
||||
};
|
||||
|
||||
b.load_one(texture_creator, "gypsum.png")?;
|
||||
b.load_one(texture_creator, "a0.png")?;
|
||||
|
||||
return Ok(b);
|
||||
}
|
||||
|
||||
pub fn get(&'a self, name: &str) -> Sprite<'a> {
|
||||
let (texture, rect) = self.data.get(name).unwrap();
|
||||
return Sprite {
|
||||
texture,
|
||||
rect: rect.clone(),
|
||||
};
|
||||
}
|
||||
|
||||
fn load_one(
|
||||
&mut self,
|
||||
texture_creator: &'a TextureCreator<WindowContext>,
|
||||
s: &str,
|
||||
) -> Result<(), String> {
|
||||
let im = ImageReader::open(format!("assets/{s}"))
|
||||
.unwrap()
|
||||
.decode()
|
||||
.unwrap();
|
||||
let width = im.width();
|
||||
let height = im.height();
|
||||
let mut im = im.as_bytes().to_vec();
|
||||
|
||||
let surface = sdl2::surface::Surface::from_data(
|
||||
&mut im,
|
||||
width,
|
||||
height,
|
||||
width * 4,
|
||||
sdl2::pixels::PixelFormatEnum::RGBA32,
|
||||
)?;
|
||||
|
||||
let texture = texture_creator
|
||||
.create_texture_from_surface(&surface)
|
||||
.map_err(|e| e.to_string())?;
|
||||
|
||||
self.data
|
||||
.insert(s.to_owned(), (texture, Rect::new(0, 0, width, height)));
|
||||
|
||||
return Ok(());
|
||||
}
|
||||
}
|
||||
Loading…
Reference in New Issue