use angle from backend to move skateboard and show score

game/Cargo.lock

@@ -104,6 +104,7 @@ dependencies = [
  "lazy_static",
  "libc",
  "sdl3-sys",
+ "sdl3-ttf-sys",
 ]
 
 [[package]]
@@ -112,6 +113,15 @@ version = "0.6.1+SDL-3.4.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1d73fc820b0b6b9bd0557de7b799ec9da1ca4f35fcd1cb42f7ceb85e640d1477"
 
+[[package]]
+name = "sdl3-ttf-sys"
+version = "0.6.0+SDL-ttf-3.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c30da3dcd7e062f19350b47a532f7629c42801b801687535fd31e8ba2adfd71d"
+dependencies = [
+ "sdl3-sys",
+]
+
 [[package]]
 name = "skate-slope"
 version = "0.1.0"

game/Cargo.toml

@@ -4,5 +4,5 @@ version = "0.1.0"
 edition = "2021"
 
 [dependencies]
-sdl3 = "0.17.3"
+sdl3 = { version = "0.17.3", features = ["ttf"] }
 rand = "0.8"

game/assets/BitcountGridDouble/OFL.txt

@@ -0,0 +1,93 @@
+Copyright 1980 The Bitcount Project Authors (https://github.com/petrvanblokland/TYPETR-Bitcount)
+
+This Font Software is licensed under the SIL Open Font License, Version 1.1.
+This license is copied below, and is also available with a FAQ at:
+https://openfontlicense.org
+
+
+-----------------------------------------------------------
+SIL OPEN FONT LICENSE Version 1.1 - 26 February 2007
+-----------------------------------------------------------
+
+PREAMBLE
+The goals of the Open Font License (OFL) are to stimulate worldwide
+development of collaborative font projects, to support the font creation
+efforts of academic and linguistic communities, and to provide a free and
+open framework in which fonts may be shared and improved in partnership
+with others.
+
+The OFL allows the licensed fonts to be used, studied, modified and
+redistributed freely as long as they are not sold by themselves. The
+fonts, including any derivative works, can be bundled, embedded, 
+redistributed and/or sold with any software provided that any reserved
+names are not used by derivative works. The fonts and derivatives,
+however, cannot be released under any other type of license. The
+requirement for fonts to remain under this license does not apply
+to any document created using the fonts or their derivatives.
+
+DEFINITIONS
+"Font Software" refers to the set of files released by the Copyright
+Holder(s) under this license and clearly marked as such. This may
+include source files, build scripts and documentation.
+
+"Reserved Font Name" refers to any names specified as such after the
+copyright statement(s).
+
+"Original Version" refers to the collection of Font Software components as
+distributed by the Copyright Holder(s).
+
+"Modified Version" refers to any derivative made by adding to, deleting,
+or substituting -- in part or in whole -- any of the components of the
+Original Version, by changing formats or by porting the Font Software to a
+new environment.
+
+"Author" refers to any designer, engineer, programmer, technical
+writer or other person who contributed to the Font Software.
+
+PERMISSION & CONDITIONS
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of the Font Software, to use, study, copy, merge, embed, modify,
+redistribute, and sell modified and unmodified copies of the Font
+Software, subject to the following conditions:
+
+1) Neither the Font Software nor any of its individual components,
+in Original or Modified Versions, may be sold by itself.
+
+2) Original or Modified Versions of the Font Software may be bundled,
+redistributed and/or sold with any software, provided that each copy
+contains the above copyright notice and this license. These can be
+included either as stand-alone text files, human-readable headers or
+in the appropriate machine-readable metadata fields within text or
+binary files as long as those fields can be easily viewed by the user.
+
+3) No Modified Version of the Font Software may use the Reserved Font
+Name(s) unless explicit written permission is granted by the corresponding
+Copyright Holder. This restriction only applies to the primary font name as
+presented to the users.
+
+4) The name(s) of the Copyright Holder(s) or the Author(s) of the Font
+Software shall not be used to promote, endorse or advertise any
+Modified Version, except to acknowledge the contribution(s) of the
+Copyright Holder(s) and the Author(s) or with their explicit written
+permission.
+
+5) The Font Software, modified or unmodified, in part or in whole,
+must be distributed entirely under this license, and must not be
+distributed under any other license. The requirement for fonts to
+remain under this license does not apply to any document created
+using the Font Software.
+
+TERMINATION
+This license becomes null and void if any of the above conditions are
+not met.
+
+DISCLAIMER
+THE FONT SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT
+OF COPYRIGHT, PATENT, TRADEMARK, OR OTHER RIGHT. IN NO EVENT SHALL THE
+COPYRIGHT HOLDER BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+INCLUDING ANY GENERAL, SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL
+DAMAGES, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF THE USE OR INABILITY TO USE THE FONT SOFTWARE OR FROM
+OTHER DEALINGS IN THE FONT SOFTWARE.

game/src/engine/game.rs

@@ -11,6 +11,9 @@ pub trait Io<R: Renderer, G: Game<R>> {
 }
 
 pub trait Renderer {
+    fn load_text(&mut self, text: &str, size: f64, color: Color) -> u32;
+    fn draw_texture(&mut self, id: u32, pos: V2);
+    fn query_texture(&mut self, id: u32) -> V2;
     fn draw_rect(&mut self, pos: V2, size: V2, color: Color);
     fn draw_point(&mut self, pos: V2, color: Color);
     fn draw_line(&mut self, from: V2, to: V2, color: Color);

game/src/engine/sdl_io.rs

@@ -1,12 +1,16 @@
-use std::time::{Duration, Instant};
+use std::{
+    collections::HashMap,
+    time::{Duration, Instant},
+};
 
 use sdl3::{
     event::Event,
     keyboard::Keycode,
     pixels::{Color as SdlColor, FColor, PixelFormat},
     rect::Point,
-    render::{Canvas, FPoint, FRect, Vertex, VertexIndices},
-    video::Window,
+    render::{Canvas, FPoint, FRect, Texture, TextureCreator, Vertex, VertexIndices},
+    ttf::{Font, Sdl3TtfContext},
+    video::{Window, WindowContext},
     Sdl, VideoSubsystem,
 };
 
@@ -20,16 +24,67 @@ use crate::engine::{
 pub static WIDTH: f64 = 1280.0;
 pub static HEIGHT: f64 = 720.0;
 
-pub struct SdlIo {
+pub struct SdlIo<'me> {
     sdl_context: Sdl,
     video_subsystem: VideoSubsystem,
+    ttf_context: Sdl3TtfContext,
     canvas: Canvas<Window>,
+    texture_handler: TextureHandler<'me>,
 }
 
-impl SdlIo {
+mod textures {
+    use std::collections::HashMap;
+
+    use sdl3::{
+        render::{Texture, TextureCreator},
+        ttf::Font,
+        video::WindowContext,
+    };
+
+    use crate::engine::Color;
+
+    pub struct TextureHandler<'me> {
+        texture_creator: TextureCreator<WindowContext>,
+        textures: HashMap<u32, Texture<'me>>,
+        id_counter: u32,
+    }
+
+    impl<'me> TextureHandler<'me> {
+        pub fn new(texture_creator: TextureCreator<WindowContext>) -> Self {
+            Self {
+                texture_creator,
+                textures: Default::default(),
+                id_counter: 0,
+            }
+        }
+        pub fn render_font(&mut self, font: Font, text: &str, color: Color) -> u32 {
+            let surface = font.render(text).blended(color).unwrap();
+            let texture = unsafe {
+                let static_texture_creator = &self.texture_creator as *const _;
+                let texture: Texture<'me> = surface.as_texture(&*static_texture_creator).unwrap();
+                texture
+            };
+            let id = self.id_counter;
+            self.textures.insert(id, texture);
+            self.id_counter += 1;
+            id
+        }
+        pub fn get(&self, id: u32) -> &Texture<'me> {
+            &self.textures[&id]
+        }
+        pub fn remove(&mut self, id: u32) {
+            self.textures.remove(&id);
+        }
+    }
+}
+
+use textures::*;
+
+impl SdlIo<'_> {
     pub fn new() -> Result<Self, Error> {
         let sdl_context = sdl3::init().unwrap();
         let video_subsystem = sdl_context.video().unwrap();
+        let ttf_context = sdl3::ttf::init().map_err(|e| e.to_string())?;
         let window = video_subsystem
             .window("Game", WIDTH as u32, HEIGHT as u32)
             .position_centered()
@@ -41,10 +96,14 @@ impl SdlIo {
         canvas.clear();
         canvas.present();
 
+        let texture_handler = TextureHandler::new(canvas.texture_creator());
+
         Ok(Self {
             sdl_context,
             video_subsystem,
+            ttf_context,
             canvas,
+            texture_handler,
         })
     }
 
@@ -119,7 +178,7 @@ impl SdlIo {
     }
 }
 
-impl Renderer for SdlIo {
+impl Renderer for SdlIo<'_> {
     fn draw_rect(&mut self, pos: V2, size: V2, color: Color) {
         let pos = self.point_w2s(pos);
         let size = self.scale_w2s(size);
@@ -181,6 +240,35 @@ impl Renderer for SdlIo {
             .render_geometry(&vertices, None, VertexIndices::Sequential)
             .unwrap();
     }
+
+    fn draw_texture(&mut self, id: u32, pos: V2) {
+        let texture = self.texture_handler.get(id);
+        let target = FRect::new(
+            pos.0 as f32,
+            pos.1 as f32,
+            texture.width() as f32,
+            texture.height() as f32,
+        );
+        self.canvas.copy(&texture, None, Some(target)).unwrap();
+        self.texture_handler.remove(id);
+    }
+
+    fn load_text(&mut self, text: &str, size: f64, color: Color) -> u32 {
+        let font = self
+            .ttf_context
+            .load_font(
+                "assets/BitcountGridDouble/BitcountGridDouble.ttf",
+                size as f32,
+            )
+            .unwrap();
+        let id = self.texture_handler.render_font(font, text, color);
+        id
+    }
+
+    fn query_texture(&mut self, id: u32) -> V2 {
+        let texture = self.texture_handler.get(id);
+        V2(texture.width() as f64, texture.height() as f64)
+    }
 }
 
 impl From<V2> for FPoint {

game/src/main.rs

@@ -6,7 +6,7 @@ use rand::Rng;
 
 use core::panic;
 use std::{
-    collections::HashSet,
+    collections::{HashSet, VecDeque},
     f64::consts::PI,
     sync::{Arc, Mutex},
     thread,
@@ -14,7 +14,7 @@ use std::{
 };
 
 use crate::{
-    engine::{Color, Key, Renderer, Scene, Shape, V2, V3},
+    engine::{Color, Key, Renderer, Scene, Shape, V2, V3, WIDTH},
     server::Server,
 };
 
@@ -26,11 +26,12 @@ struct Skateboard {
     rot: V3,
     nyoom_factor: f64,
     pivot_deg: f64,
+    pivot_deg_target: f64,
 }
 
 impl Skateboard {
     fn update(&mut self, delta_time: Duration) {
-        self.vel.0 = self.pivot_deg * delta_time.as_secs_f64();
+        self.vel.0 = self.pivot_deg * 2.0 * delta_time.as_secs_f64();
         self.pos += self.vel * delta_time.as_secs_f64();
         self.nyoom_factor += 16.0 * delta_time.as_secs_f64();
     }
@@ -156,11 +157,12 @@ struct Game {
     segments: Vec<Segment>,
     camera_pos: V3,
     keys_pressed: HashSet<Key>,
+    event_queue: Arc<Mutex<VecDeque<f64>>>,
 }
 
 impl Game {
     fn new() -> Self {
-        let start_pos = V3(0.0, -0.15, -0.4);
+        let start_pos = V3(0.0, -0.15, 0.0);
         Self {
             skateboard: Skateboard {
                 start_pos,
@@ -170,8 +172,10 @@ impl Game {
                 rot: V3(0.0, PI * 0.5, 0.0),
                 nyoom_factor: 0.0,
                 pivot_deg: 0.0,
+                pivot_deg_target: 0.0,
             },
-            camera_pos: V3(0.0, 0.0, -1.0),
+            event_queue: Arc::new(Mutex::new(VecDeque::new())),
+            camera_pos: V3(0.0, 0.0, -0.6),
             segments: Vec::new(),
             keys_pressed: HashSet::new(),
         }
@@ -200,23 +204,32 @@ impl<R: Renderer> engine::Game<R> for Game {
             self.skateboard.pos.2 - 0.4,
         );
 
-        if self.keys_pressed.contains(&Key::Left) == self.keys_pressed.contains(&Key::Right) {
-            let decay_rate = 1.0 - (4.0 * delta_time.as_secs_f64());
-            self.skateboard.pivot_deg *= decay_rate;
-        }
+        // if self.keys_pressed.contains(&Key::Left) == self.keys_pressed.contains(&Key::Right) {
+        //     let decay_rate = 1.0 - (4.0 * delta_time.as_secs_f64());
+        //     self.skateboard.pivot_deg *= decay_rate;
+        // }
         if self.keys_pressed.contains(&Key::Left) {
             self.skateboard.pivot_deg -= 36.0 * delta_time.as_secs_f64();
-            if self.skateboard.pivot_deg < -12.5 {
-                self.skateboard.pivot_deg = -12.5;
-            }
         }
         if self.keys_pressed.contains(&Key::Right) {
             self.skateboard.pivot_deg += 36.0 * delta_time.as_secs_f64();
-            if self.skateboard.pivot_deg > 12.5 {
-                self.skateboard.pivot_deg = 12.5;
+        }
+
+        {
+            let mut angles = self.event_queue.lock().unwrap();
+
+            for angle in angles.drain(..) {
+                self.skateboard.pivot_deg_target = angle / 2.0;
             }
         }
 
+        self.skateboard.vel.2 += 0.02 * delta_time.as_secs_f64();
+
+        self.skateboard.pivot_deg += (self.skateboard.pivot_deg_target - self.skateboard.pivot_deg)
+            * 4.0
+            * delta_time.as_secs_f64();
+        self.skateboard.pivot_deg = self.skateboard.pivot_deg.max(-12.5).min(12.5);
+
         let ids = self
             .segments
             .iter()
@@ -256,6 +269,13 @@ impl<R: Renderer> engine::Game<R> for Game {
             object.render(&mut scene);
         }
         scene.render(r, self.camera_pos);
+        let id = r.load_text(
+            &format!("{}", (self.skateboard.pos.2 * 100.0) as u32),
+            48.0,
+            Color::Green,
+        );
+        let V2(width, _height) = r.query_texture(id);
+        r.draw_texture(id, V2(WIDTH / 2.0 - width / 2.0, 50.0));
     }
 
     fn event(&mut self, event: engine::Event) {
@@ -400,18 +420,20 @@ impl ShapeGroup {
 }
 
 fn main() -> Result<(), Box<dyn std::error::Error>> {
-    let t = thread::spawn(|| {
+    let mut sdl_io = engine::SdlIo::new()?;
+
+    let mut game = Game::new();
+    let event_queue = game.event_queue.clone();
+    let _ = thread::spawn(move || {
         let mut server = Server::new("10.133.51.127:8888").unwrap();
         server
             .subscribe(|measurement| {
+                event_queue.lock().unwrap().push_back(measurement.angle);
                 println!("angle = {}", measurement.angle);
             })
             .unwrap();
     });
 
-    let mut sdl_io = engine::SdlIo::new()?;
-    let mut game = Game::new();
-
     let first_segment: Segment = Segment::new(
         0,
         vec![Obstacle {