no-std enum from u8

caveat: num_traits needs std

Cargo.lock

@@ -58,7 +58,7 @@ checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
 
 [[package]]
 name = "client"
-version = "0.1.0"
+version = "1.0.0"
 dependencies = [
  "gilrs",
  "minifb",
@@ -609,7 +609,7 @@ checksum = "8b870d8c151b6f2fb93e84a13146138f05d02ed11c7e7c54f8826aaaf7c9f184"
 
 [[package]]
 name = "pirates"
-version = "0.1.0"
+version = "1.0.0"
 dependencies = [
  "libm",
  "nalgebra",

Cargo.toml

@@ -4,8 +4,12 @@ members = [
 "client",
 ]
 
+[profile.release]
+lto = true
+opt-level = 3
+
 [profile.minsized]
 inherits = "release"
 lto = true
-opt-level = 'z'
+opt-level = 's'
 strip = true

README.md

@@ -2,15 +2,32 @@
 
 my [entry](https://js13kgames.com/entries/simple-sailing-simulator) to js13kgames 2023
 
+![Gameplay screenshot, a pixelated sailboat exits a well-protected bay](https://github.com/Speedy6451/simplesailing/assets/37423245/16b60975-08f3-4f62-b0df-f78ba95454f5)
+
 > Brave the north wind and search for York, or simply explore.
 
 ### Controls
-    +/-: zoom
+|keyboard | controller | action
-    A: rudder left
+|---|---|---
-    D: rudder right
+|`A`|`D-Left`|rudder left
+|`D`|`D-Right`|rudder right
+||Left Stick X|rudder
+|`+`|`D-Up`|zoom in
+|`-`|`D-Down`|zoom out
+||Right Stick Y|zoom
+|`E`|`B`|raise sails
+|`Q`|`A`|lower sails
+||Left Stick Y + Left Bumper|control sails
+|arrow keys|Right Stick + Right Bumper|pan camera
+|`R`|`Y`|reset sailboat
+|`/`|`X`|reset camera
+|Esc||quit
 
 Your sailboat travels fastest going perpendicular to the wind.
 
+#### Installation
+
+download the [latest release](https://github.com/Speedy6451/simplesailing/releases/latest)
 
 #### Building from source
 

client/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "client"
-version = "0.1.0"
+version = "1.0.0"
 edition = "2021"
 description = "A game about wind"
 

client/src/main.rs

@@ -1,8 +1,10 @@
+use std::time::SystemTime;
 use minifb::{Key, ScaleMode, Window, WindowOptions, Scale};
 extern crate pirates;
-use pirates::{WIDTH, HEIGHT};
+use pirates::{WIDTH, HEIGHT, Input};
 #[cfg(feature = "gilrs")]
 use gilrs::{Axis, Gilrs, Button};
+use pirates::Input::*;
 
 fn main() {
     #[cfg(feature = "gilrs")]
@@ -26,17 +28,17 @@ fn main() {
 
     let mut buffer: Vec<u32> = Vec::with_capacity(WIDTH * HEIGHT);
 
-    fn keyboard_input(key: u8) {
+    fn keyboard_input(key: Input) {
         unsafe {
-            pirates::KEYCODE[0] = key;
+            pirates::KEYCODE[0] = key as u8;
             pirates::keyboard_input();
         }
     }
 
-    fn analog_input(chan: u8, val: f32) {
+    fn analog_input(chan: Input, val: f32) {
         let val = (val * 127.0) as i8;
         unsafe {
-            pirates::KEYCODE[0] = chan;
+            pirates::KEYCODE[0] = chan as u8;
             pirates::KEYCODE[1] = (val + 127) as u8;
             pirates::keyboard_input();
         }
@@ -45,9 +47,16 @@ fn main() {
     #[cfg(feature = "gamepad")]
     let mut gamepad_handle = None;
 
+    let mut frame_start: SystemTime = SystemTime::now();
+
     while window.is_open() && !window.is_key_down(Key::Escape) {
+        let last_frame = frame_start.elapsed().unwrap().as_micros();
+        frame_start = SystemTime::now();
+
         buffer.clear();
         unsafe {
+            pirates::LAST_FRAME_TIME = last_frame as f32 / 1000.0;
+
             pirates::frame_entry();
             for pix in pirates::BUFFER {
                 // AABBGGRR to 00RRGGBB 
@@ -66,43 +75,64 @@ fn main() {
         #[cfg(feature = "gamepad")]
         if let Some(gamepad) = gamepad_handle.map(|h| gilrs.gamepad(h)) {
             gamepad.axis_data(Axis::LeftStickX).map(|axis| {
-                analog_input(1, axis.value());
+                analog_input(AxisRudder, axis.value());
             });
+            if gamepad.is_pressed(Button::LeftTrigger) {
+                gamepad.axis_data(Axis::LeftStickY).map(|axis| {
+                    analog_input(AxisSail, axis.value());
+                });
+            }
+            if gamepad.is_pressed(Button::South) {
+                keyboard_input(RaiseSail)
+            }
+            if gamepad.is_pressed(Button::East) {
+                keyboard_input(LowerSail)
+            }
             if gamepad.is_pressed(Button::RightTrigger) {
                 gamepad.axis_data(Axis::RightStickY).map(|axis| {
-                    analog_input(3, dbg!(axis.value()));
+                    analog_input(AxisPanY, axis.value());
                 });
                 gamepad.axis_data(Axis::RightStickX).map(|axis| {
-                    analog_input(4, dbg!(axis.value()));
+                    analog_input(AxisPanX, axis.value());
                 });
             } else {
                 gamepad.axis_data(Axis::RightStickY).map(|axis| {
-                    analog_input(0, dbg!(axis.value()));
+                    analog_input(AxisZoom, axis.value());
                 });
             }
+            if gamepad.is_pressed(Button::West) {
+                keyboard_input(ResetCamera)
+            }
+            if gamepad.is_pressed(Button::North) {
+                keyboard_input(ResetBoat)
+            }
             if gamepad.is_pressed(Button::DPadLeft) {
-                keyboard_input(65)
+                keyboard_input(PanLeft)
             }
             if gamepad.is_pressed(Button::DPadRight) {
-                keyboard_input(68)
+                keyboard_input(PanRight)
             }
             if gamepad.is_pressed(Button::DPadUp) {
-                keyboard_input(61)
+                keyboard_input(ZoomIn)
             }
             if gamepad.is_pressed(Button::DPadDown) {
-                keyboard_input(173)
+                keyboard_input(ZoomOut)
             }
         }
 
         window.get_keys().iter().for_each(|key| match key {
-            Key::A => keyboard_input(65),
+            Key::A => keyboard_input(RudderLeft),
-            Key::D => keyboard_input(68),
+            Key::D => keyboard_input(RudderRight),
-            Key::Equal => keyboard_input(61),
+            Key::Equal => keyboard_input(ZoomIn),
-            Key::Minus => keyboard_input(173),
+            Key::Minus => keyboard_input(ZoomOut),
-            Key::Up => keyboard_input(38),
+            Key::Up => keyboard_input(PanUp),
-            Key::Down => keyboard_input(40),
+            Key::Down => keyboard_input(PanDown),
-            Key::Left => keyboard_input(37),
+            Key::Left => keyboard_input(PanLeft),
-            Key::Right => keyboard_input(39),
+            Key::Right => keyboard_input(PanRight),
+            Key::R => keyboard_input(ResetBoat),
+            Key::Slash => keyboard_input(ResetCamera),
+            Key::E => keyboard_input(RaiseSail),
+            Key::Q => keyboard_input(LowerSail),
             _ => (),
         });
 

front/index.js

@@ -4,8 +4,20 @@ var memory;
 var exports;
 const width = 160;
 const height = 144;
+const TIME_GAIN = 0.1; // game is unplayable at full speed with wasm refresh rates
 
 function blit_frame() {
+    // this is required when using an allocator from wasm as there is 
+    // no way to update the internal pointer when linear memory shifts
+    image = new ImageData(
+        new Uint8ClampedArray(
+            memory.buffer,
+            exports.BUFFER.value,
+            4 * width * height,
+        ),
+        width,
+    );
+
     ctx.putImageData(image, 0, 0);
 }
 
@@ -47,21 +59,27 @@ async function init() {
     document.getElementById("body").onkeydown=keyboard_callback;
 
     memory = instance.exports.memory
-    const buffer_address = instance.exports.BUFFER.value;
-    image = new ImageData(
-        new Uint8ClampedArray(
-            memory.buffer,
-            buffer_address,
-            4 * width * height,
-        ),
-        width,
-    );
-
     instance.exports.frame_entry();
     ctx.textBaseline = 'top'
     ctx.textAlign = 'left';
 
-    const render = () => {
+    var last;
+    var elapsed;
+
+    const render = (time) => {
+        if(!last) { elapsed = 0; }
+        else {
+            elapsed = time-last;
+        }
+        last=time;
+
+        if(!elapsed) {
+            elapsed = 0.0;
+        }
+
+        const FRAME_TIME = new Float32Array(exports.memory.buffer, exports.LAST_FRAME_TIME, 1);
+        FRAME_TIME[0] = elapsed * TIME_GAIN;
+
         instance.exports.frame_entry();
 
         requestAnimationFrame(render);

pirates/Cargo.toml

@@ -1,16 +1,12 @@
 [package]
 name = "pirates"
-version = "0.1.0"
+version = "1.0.0"
 edition = "2021"
 
 [features]
 default = ["wasm"]
 wasm = ["wee_alloc"]
 
-[profile.release]
-lto = true
-opt-level = 's'
-
 [lib]
 crate-type = ["lib", "cdylib"]
 

pirates/src/lib.rs

@@ -23,8 +23,6 @@ use spin::Mutex;
 #[cfg(feature = "rayon")]
 use rayon::prelude::*;
 
-use crate::noise::lerp;
-
 mod sampler;
 mod noise;
 
@@ -47,6 +45,9 @@ fn draw_text(text: &str, x: i32, y: i32, size: u8) {
 pub const WIDTH: usize = 160;
 pub const HEIGHT: usize = 144;
 
+#[no_mangle]
+pub static mut LAST_FRAME_TIME: f32 = 0.0;
+
 #[no_mangle]
 pub static mut BUFFER: [u32; WIDTH * HEIGHT] = [0; WIDTH * HEIGHT];
 
@@ -77,7 +78,12 @@ static MAP: [u8; MAP_WIDTH * MAP_HEIGHT] = [ // should deflate to smaller than b
 
 static CAMERA: Mutex<[f32; 3]> = Mutex::new([0.0, 0.0, 0.18]);
 
-static BOAT: Mutex<Boat> = Mutex::new(Boat { x: 0.0, y: 0.0, theta: 0.0, vel: 0.0 });
+static BOAT: Mutex<Boat> = Mutex::new(Boat {
+    x: 0.0, y: 0.0,
+    theta: 0.0,
+    vel: 0.0,
+    sail: 1.0,
+});
 
 #[no_mangle]
 pub unsafe extern fn keyboard_input() {
@@ -105,50 +111,71 @@ fn render_frame(buffer: &mut [u32; WIDTH*HEIGHT]) {
     let mut camera = CAMERA.lock();
     let mut boat = BOAT.lock();
 
-    //camera[0] += 1.0;
+    let mut gain = unsafe { // very much an approximation of constant-velocity animation
-
+        LAST_FRAME_TIME / (1000.0 / 20.0) // normalize to 20fps, cap simulation at 10fps
+    };
     while let Some(key) = INPUTS.lock().pop() {
-        match key[0] {
+        use Input::*;
-            38 => camera[1] -= 10.0*camera[2], // up
+        let input = (key[0] as u8).try_into().ok();
-            40 => camera[1] += 10.0*camera[2], // down
+        if input.is_none() { continue; }
-            37 => camera[0] -= 10.0*camera[2], // left
+        match input.unwrap() {
-            39 => camera[0] += 10.0*camera[2], // right
+            PanUp => camera[1] -= gain*10.0*camera[2], // up
-            61 => camera[2] *= 0.9, // +
+            PanDown => camera[1] += gain*10.0*camera[2], // down
-            173 => camera[2] *= 1.1, // -
+            PanLeft => camera[0] -= gain*10.0*camera[2], // left
-            65 => boat.theta -= 10.0, // A
+            PanRight => camera[0] += gain*10.0*camera[2], // right
-            68 => boat.theta += 10.0, // D
+            ResetCamera => {
-            0 => camera[2] *= 1.0 - (key[1] as f32 - 127.0) * 0.0004, // analog zoom
+                *camera = [
-            1 => boat.theta += (key[1] as f32 - 127.0) * 0.031, // analog rudder
+                    noise::lerp(camera[0], 0.00, (gain * 0.25).min(1.0)),
-            3 => camera[1] -= (key[1] as f32 - 127.0) * 0.004, // pan[y]
+                    noise::lerp(camera[1], 0.00, (gain * 0.25).min(1.0)),
-            4 => camera[0] += (key[1] as f32 - 127.0) * 0.004, // pan[x]
+                    noise::lerp(camera[2], 0.18, (gain * 0.25).min(1.0)),
-            _ => {}
+                ]
+            }, // reset camera (/)
+            ResetBoat => boat.set_pos(Vector2::zeros()), // reset boat (r)
+            ZoomIn => camera[2] *= 1.0 - 0.1*gain, // +
+            ZoomOut => camera[2] *= 1.0 + 0.1*gain, // -
+            RudderLeft => boat.theta -= gain*10.0, // A
+            RudderRight => boat.theta += gain*10.0, // D
+            AxisZoom => camera[2] *= 1.0 - (key[1] as f32 - 127.0) * 0.0004 * gain, // analog zoom
+            AxisRudder => boat.theta += gain * (key[1] as f32 - 127.0) * 0.062, // analog rudder
+            AxisPanY => camera[1] -= gain * (key[1] as f32 - 127.0) * 0.1 * camera[2], // pan[y]
+            AxisPanX => camera[0] += gain * (key[1] as f32 - 127.0) * 0.1 * camera[2], // pan[x]
+            AxisSail => boat.sail += gain * (key[1] as f32 - 127.0) * 0.0013, // sail
+            RaiseSail => boat.sail += gain * 0.062, // E
+            LowerSail => boat.sail -= gain * 0.062, // Q
         }
     } 
+    boat.sail = boat.sail.clamp(0.0, 1.5);
 
     let wind = 0.0/RAD_TO_DEG;
-    let vel = boat.get_velocity(wind);
 
-    let camera_vec = Vector2::new(camera[0],camera[1]);
+    let step = 1.0; // 50ms
-    let boat_pos = boat.get_pos();
+    while gain > 0.0 { // when draw fps is low, physics will still run at a minimum of 20fps
+        gain -= step;
+        let gain = gain + step;
+        
+        let vel = boat.get_velocity(wind);
 
-    let depth = -sample_world(boat_pos+HALF, rand);
+        let depth = -sample_world(boat.get_pos()+HALF, rand);
-    if depth < -0.04 {
+        if depth < -0.04 {
-        boat.vel = 0.0;
+            boat.vel = 0.0;
-    } else if depth < 0.0 {
+        } else if depth < 0.0 {
-        boat.vel *= (1.0 - depth) * 0.25;
+            boat.vel *= 1.0 + (depth * gain * 30.2).min(0.0);
-    } 
+        } 
 
-    if depth > -0.04 {
+        if depth > -0.04 {
-        boat.go_smooth(-vel * 0.42);
+            boat.vel = noise::lerp(boat.vel, vel * 0.82, 0.13 * gain);
+            boat.go(gain);
+        }
     }
 
     // draw sea
     const HALF: Vector2<f32> = Vector2::new(WIDTH as f32 / 2.0, HEIGHT as f32 / 2.0);
+    let camera_vec = Vector2::new(camera[0],camera[1]);
 
     #[cfg(feature = "rayon")]
-    let mut buffer_iter = buffer.par_iter_mut();
+    let buffer_iter = buffer.par_iter_mut();
     #[cfg(not(feature = "rayon"))]
-    let mut buffer_iter = buffer.iter_mut();
+    let buffer_iter = buffer.iter_mut();
 
     buffer_iter.enumerate().for_each(|pix| {
         let y = pix.0 / WIDTH;
@@ -157,7 +184,7 @@ fn render_frame(buffer: &mut [u32; WIDTH*HEIGHT]) {
         point -= HALF;
         point *= camera[2];
         point += HALF;
-        let n = sample_world(point+camera_vec+boat_pos, rand);
+        let n = sample_world(point+camera_vec+boat.get_pos(), rand);
         *pix.1 = 
         if n > 0.1 {
             let n = (n+0.1) * 300.0;
@@ -237,8 +264,7 @@ fn draw_tri(color: u32, buffer: &mut [u32; WIDTH*HEIGHT], p1: Vector2<f32>, p2:
 }
 
 fn sample_world(point: Vector2<f32>, rand: PerlinBuf) -> f32 {
-    let offset = Vector2::new(64480.0, 7870.0);
+    let offset = Vector2::new(64492.0, 7892.0);
-    //240.0,240.0
     let point = point + offset;
     let mut n = 0.0;
     n += (sampler::sample_map_inter(point / 64.0, &MAP)-0.5)* 0.6;
@@ -257,6 +283,8 @@ struct Boat {
     y: f32,
     theta: f32,
     vel: f32,
+    /// sail height 0-1
+    sail: f32,
 }
 
 impl Boat {
@@ -270,26 +298,81 @@ impl Boat {
     }
 
     fn get_intensity(self: &Self, wind_direction: f32) -> f32 {
-        libm::sinf((self.theta-wind_direction)/RAD_TO_DEG)
+        libm::sinf((self.theta-wind_direction)/RAD_TO_DEG) * self.sail
     }
 
     fn get_velocity(self: &Self, wind_direction: f32) -> f32 {
         libm::fabsf(self.get_intensity(wind_direction))
     }
 
-    fn go_smooth(self: &mut Self, vel: f32) {
+    fn go(self: &mut Self, gain: f32) {
-        self.vel = noise::lerp(self.vel, vel, 0.09);
-
-        self.go(self.vel);
-    }
-
-    fn go(self: &mut Self, velocity: f32) {
         let cos = libm::cosf((self.theta+ 45.0)/RAD_TO_DEG);
         let sin = libm::sinf((self.theta+ 45.0)/RAD_TO_DEG);
         let unit = Vector2::new(
             cos - sin,
             sin + cos);
-        self.set_pos(self.get_pos() + unit * velocity);
+        self.set_pos(self.get_pos() + unit * -self.vel * gain);
     }
     
 }
+
+impl TryFrom<u8> for Input {
+    type Error = &'static str;
+
+    fn try_from(input: u8) -> Result<Self, Self::Error> {
+        use Input::*;
+        match input {
+            38 => Ok(PanUp),
+            40 => Ok(PanDown),
+            37 => Ok(PanLeft),
+            39 => Ok(PanRight),
+            61 => Ok(ZoomIn),
+            173 => Ok(ZoomOut),
+            65 => Ok(RudderLeft),
+            68 => Ok(RudderRight),
+            69 => Ok(RaiseSail),
+            81 => Ok(LowerSail),
+            82 => Ok(ResetBoat),
+            191 => Ok(ResetCamera),
+            0 => Ok(AxisZoom),
+            1 => Ok(AxisRudder),
+            3 => Ok(AxisPanY),
+            4 => Ok(AxisPanX),
+            5 => Ok(AxisSail),
+            _ => Err("unmapped")
+        }
+    }
+    
+}
+#[repr(u8)]
+pub enum Input {
+    /// Up Arrow
+    PanUp = 38,
+    /// Down Arrow
+    PanDown = 40,
+    /// Left Arrow
+    PanLeft = 37,
+    /// Right Arrow
+    PanRight = 39,
+    /// + 
+    ZoomIn = 61,
+    /// -
+    ZoomOut = 173,
+    /// A
+    RudderLeft = 65,
+    /// D
+    RudderRight = 68,
+    /// "/"
+    ResetCamera = 191,
+    /// R
+    ResetBoat = 82,
+    /// E
+    RaiseSail = 69,
+    /// Q
+    LowerSail = 81,
+    AxisZoom = 0,
+    AxisRudder = 1, 
+    AxisPanY = 3, 
+    AxisPanX = 4, 
+    AxisSail = 5,
+}