Added restart, text display and score, updated ReadMe

ReadMe.md

@@ -30,6 +30,12 @@ brew install sdl2
 export LIBRARY_PATH="$LIBRARY_PATH:/usr/local/lib"
 ```
 
+### Run the game 
+```
+cargo run --release
+```
+You can also just enter ``` cargo build --release ```` and then start the binary from target/src
+
 ## How to play ?
 
 This is a local multiplayer game, so two players can play using the same keyboard, player 1 uses 'w' and 's' and so player 2 uses the arrow keys.

src/main.rs

@@ -5,6 +5,7 @@ use tetra::input::{self, Key};
 use tetra::math::Vec2;
 use tetra::window;
 use tetra::{Context, ContextBuilder, State};
+use tetra::graphics::text::*;
 
 const WINDOW_WIDTH:f32 = 640.0;
 const WINDOW_HEIGHT:f32 = 480.0;
@@ -12,6 +13,7 @@ const PADDLE_SPEED:f32 = 8.0;
 const BALL_SPEED:f32 = 5.0;                                     
 const PADDLE_SPIN: f32 = 4.0;
 const BALL_ACC:f32 = 0.05;
+const SCORE_LOCATION:Vec2<f32> = Vec2::new(16.0,16.0);
 
 struct Entity {
     texture: Texture,
@@ -51,11 +53,18 @@ impl Entity{
         )
     }
 }
-
+enum GameStatus {
+    Playing,
+    Pause,
+    Ended,
+}
 struct GameState {
     player1: Entity,
     player2: Entity,
     ball: Entity,
+    score_text: Text,
+    score:i32,
+    state:GameStatus
 }
 
 impl GameState{
@@ -74,27 +83,52 @@ impl GameState{
 
         let ball_speed = Vec2::new(-BALL_SPEED,0.0);
 
+        let vector_text = Text::new(
+            format!("Score : {}",0),
+            Font::vector(ctx, "./resources/Roboto-Regular.ttf", 16.0)?,
+        );
+
+
         Ok(GameState {
             player1: Entity::new(player1_texture,player1_position),
             player2: Entity::new(player2_texture,player2_position),
             ball: Entity::with_velocity(ball_texture,ball_position,ball_speed),
+            score_text: vector_text,
+            score:0,
+            state:GameStatus::Pause,
         })
     }
+    fn restart(&mut self){
+        self.player1.position = Vec2::new(16.0,(WINDOW_HEIGHT - self.player1.texture.height() as f32) / 2.0);
+        self.player2.position = Vec2::new(WINDOW_WIDTH - self.player2.texture.width() as f32 -16.0,(WINDOW_HEIGHT - self.player2.texture.height() as f32) / 2.0);
+        self.ball.position = Vec2::new(WINDOW_WIDTH / 2.0 - (self.ball.texture.width() as f32 / 2.0) as f32,WINDOW_HEIGHT / 2.0 - (self.ball.texture.height() as f32 / 2.0) as f32);
+
+        self.ball.velocity = Vec2::new(-BALL_SPEED,0.0);
+
+        self.score = 0;
+        self.score_text.set_content(format!("Score : {}",0));
+
+        self.state = GameStatus::Pause;
+    }
 }
 
 impl State for GameState{
     
     fn draw(&mut self, ctx: &mut Context) -> tetra::Result {
-        graphics::clear(ctx,Color::hex("#CCCCCC"));
+        graphics::clear(ctx,Color::hex("#333333"));
 
         self.player1.texture.draw(ctx,self.player1.position);
         self.player2.texture.draw(ctx,self.player2.position);
         self.ball.texture.draw(ctx,self.ball.position);
+        self.score_text.draw(ctx, SCORE_LOCATION);
 
         Ok(())
     }
+
     fn update(&mut self,ctx: &mut Context) -> tetra::Result{
         //Player 1 movements
+        match self.state {
+            GameStatus::Playing =>{
                 if input::is_key_down(ctx, Key::W) && self.player1.position.y as i32 > 0{
                     self.player1.position.y -= PADDLE_SPEED;
                 }
@@ -132,6 +166,10 @@ impl State for GameState{
                     let offset = (paddle.centre().y - self.ball.centre().y) / paddle.height();
         
                     self.ball.velocity.y += PADDLE_SPIN * -offset;
+            
+                    //increase the score as 
+                    self.score += 1;
+                    self.score_text.set_content(format!("Score : {}",self.score));
                 }
         
                 self.ball.position += self.ball.velocity;
@@ -142,20 +180,38 @@ impl State for GameState{
                 }
                 //check winner
                 if self.ball.position.x <= 0.0{
-            window::quit(ctx);
-            println!("Player 2 won!");
+                    //window::quit(ctx);
+                    self.score_text.set_content("Player 2 Won!\nPress Enter to play again");
+                    self.state = GameStatus::Ended;
                 }
                 if self.ball.position.x + self.ball.width() >= WINDOW_WIDTH{
-            window::quit(ctx);
-            println!("Player 1 won!");
+                    //window::quit(ctx);
+                    self.score_text.set_content("Player 2 Won!\nPress Enter to play again");
+                    self.state = GameStatus::Ended;
+                }
+            }
+            GameStatus::Pause =>{
+                self.score_text.set_content("Remember \nPlayer 1 uses 'w' and 's'\nPlayer 2 uses up and down arrow keys\nPress Enter to start the game");
+
+                if input::is_key_down(ctx, Key::Enter){
+                    self.state = GameStatus::Playing;
+                }
+            }
+            GameStatus::Ended =>{
+                if input::is_key_down(ctx, Key::Enter){
+                    self.restart();
+                    println!("DEBUG: game restarted");
+                }
+            }
         }
 
         Ok(())
     }
 }
 
+
 fn main() -> tetra::Result{
-    ContextBuilder::new("Pong",WINDOW_WIDTH as i32,WINDOW_HEIGHT as i32)
+    ContextBuilder::new("Rusty Pong",WINDOW_WIDTH as i32,WINDOW_HEIGHT as i32)
     .quit_on_escape(true)
     .build()?
     .run(GameState::new)