working, just need to revise scoring and tick counting

.gitignore

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+/target

Cargo.lock

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+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "bitflags"
+version = "1.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"
+
+[[package]]
+name = "cat-box"
+version = "22.6.21"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "718fced54b0fc65b4c154bad8cbd2826447a91a2c2d3980a94cd7e2beadcb73b"
+dependencies = [
+ "sdl2",
+]
+
+[[package]]
+name = "cfg-if"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
+
+[[package]]
+name = "lazy_static"
+version = "1.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
+
+[[package]]
+name = "libc"
+version = "0.2.139"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "201de327520df007757c1f0adce6e827fe8562fbc28bfd9c15571c66ca1f5f79"
+
+[[package]]
+name = "ping"
+version = "0.1.0"
+dependencies = [
+ "cat-box",
+ "sdl2",
+]
+
+[[package]]
+name = "sdl2"
+version = "0.35.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f7959277b623f1fb9e04aea73686c3ca52f01b2145f8ea16f4ff30d8b7623b1a"
+dependencies = [
+ "bitflags",
+ "lazy_static",
+ "libc",
+ "sdl2-sys",
+]
+
+[[package]]
+name = "sdl2-sys"
+version = "0.35.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e3586be2cf6c0a8099a79a12b4084357aa9b3e0b0d7980e3b67aaf7a9d55f9f0"
+dependencies = [
+ "cfg-if",
+ "libc",
+ "version-compare",
+]
+
+[[package]]
+name = "version-compare"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "579a42fc0b8e0c63b76519a339be31bed574929511fa53c1a3acae26eb258f29"

Cargo.toml

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+[package]
+name = "ping"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+cat-box = "22.6.21"
+sdl2 = "0.35.2"

src/ball.rs

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+use cat_box::Sprite;
+
+pub struct Ball {
+    pub sprite: Sprite,
+    pub vol_x: i32,
+    pub vol_y: i32,
+}
+
+impl Ball {
+    pub fn new(x: i32, y: i32) -> Ball {
+        Ball {
+            sprite: Sprite::from_bytes(include_bytes!("../ping.png"), x, y).unwrap(),
+            vol_x: -1,
+            vol_y: 0,
+        }
+    }
+}

src/main.rs

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+use cat_box::{get_keyboard_state, physics::check_for_collision, Game, Sprite};
+use sdl2::keyboard::Scancode;
+use std::time::Instant;
+
+mod ball;
+
+#[derive(Copy, Clone, Debug, Eq, PartialEq)]
+enum Direction {
+    Up,
+    Down,
+    Still,
+}
+const CORNER: i32 = 37 / 2;
+
+fn main() {
+    let game = Game::new("pingPong", 500, 500);
+
+    let mut ball = ball::Ball::new(250, 250);
+
+    let paddle_bytes = include_bytes!("../paddle.png");
+    let mut paddle = Sprite::from_bytes(paddle_bytes, 37, 250 - CORNER).unwrap();
+    let mut paddle_enemy = Sprite::from_bytes(paddle_bytes, 500 - 37, 250 - CORNER).unwrap();
+
+    let mut held = true;
+
+    let mut dir = Direction::Still;
+    let mut dir_enemy = Direction::Still;
+
+    let mut now = Instant::now();
+    game.run(|ctx| {
+        ctx.set_background_colour(0, 0, 0);
+
+        let (x_player, y_player) = paddle.position().into();
+        let (x_enemy, y_enemy) = paddle_enemy.position().into();
+
+        let (_, y_ball) = ball.sprite.position().into();
+
+        let keys = get_keyboard_state(ctx).keys;
+        for key in &keys {
+            match key {
+                Scancode::W | Scancode::Up => {
+                    dir = Direction::Up;
+                    held = true;
+                }
+                Scancode::S | Scancode::Down => {
+                    dir = Direction::Down;
+                    held = true;
+                }
+                _ => {
+                    dir = Direction::Still;
+                    held = false;
+                }
+            };
+        }
+
+        if y_enemy < y_ball {
+            dir_enemy = Direction::Down;
+        }
+        if y_enemy > y_ball {
+            dir_enemy = Direction::Up;
+        }
+
+        if now.elapsed().as_millis() >= 90 {
+            if check_for_collision(&paddle, &ball.sprite) {
+                if dir == Direction::Up {
+                    ball.vol_y += 1;
+                }
+                if dir == Direction::Down {
+                    ball.vol_y -= 1;
+                }
+                ball.vol_x *= -1;
+                ball.vol_y *= -1;
+            }
+            if check_for_collision(&paddle_enemy, &ball.sprite) {
+                if dir_enemy == Direction::Up {
+                    ball.vol_y += 1;
+                }
+                if dir_enemy == Direction::Down {
+                    ball.vol_y -= 1;
+                }
+                ball.vol_x *= -1;
+                ball.vol_y *= -1;
+            }
+            if y_ball == 0 || y_ball == 500
+            {
+                
+                ball.vol_y *= -1;
+            }
+
+            ball.sprite.translate((ball.vol_x, ball.vol_y));
+        }
+        if now.elapsed().as_millis() >= 120 {
+            if (y_enemy - CORNER) < 0 {
+                dir_enemy = Direction::Still;
+                paddle_enemy.set_position((x_enemy, 1 + CORNER));
+            } else if (y_player + CORNER) > 500 {
+                dir_enemy = Direction::Still;
+                paddle_enemy.set_position((x_enemy, 500 - CORNER));
+            }
+
+            match dir_enemy {
+                Direction::Up => {
+                    paddle_enemy.translate((0, 25));
+                }
+                Direction::Down => {
+                    paddle_enemy.translate((0, -25));
+                }
+                _ => (),
+            };
+        }
+        if now.elapsed().as_millis() >= 120 {
+            if (y_player - CORNER) < 0 {
+                dir = Direction::Still;
+                paddle.set_position((x_player, 1 + CORNER));
+            } else if (y_player + CORNER) > 500 {
+                dir = Direction::Still;
+                paddle.set_position((x_player, 500 - CORNER));
+            }
+            if held {
+                match dir {
+                    Direction::Up => {
+                        paddle.translate((0, 25));
+                    }
+                    Direction::Down => {
+                        paddle.translate((0, -25));
+                    }
+                    _ => (),
+                };
+            } 
+            now = Instant::now();
+        }
+        
+
+        ball.sprite.draw(ctx).unwrap();
+        paddle.draw(ctx).unwrap();
+        paddle_enemy.draw(ctx).unwrap();
+    })
+    .unwrap();
+}