learn-wgpu/code/showcase/pong/src/state.rs

use cgmath::prelude::*;

#[derive(Eq, PartialEq)]
pub enum GameState {
    MainMenu,
    Serving,
    Playing,
    GameOver,
    Quiting,
}

pub struct State {
    pub ball: Ball,
    pub player1: Player,
    pub player2: Player,
    // pub title_text: Text,
    // pub play_button: Text,
    // pub quit_button: Text,
    pub game_state: GameState,
}

pub struct Ball {
    pub position: cgmath::Vector2<f32>,
    pub velocity: cgmath::Vector2<f32>,
    pub radius: f32,
    pub visible: bool,
}

pub struct Player {
    pub position: cgmath::Vector2<f32>,
    pub size: cgmath::Vector2<f32>,
    pub score: u32,
    pub visible: bool,
}

// I don't like giving state methods, but whatever
impl Player {
    pub fn contains(&self, ball: &Ball) -> bool {
        let radii = self.size * 0.5;
        let min = self.position - radii;
        let max = self.position + radii;
        ball.position.x > min.x && ball.position.y > min.y
        && ball.position.x < max.x && ball.position.y < max.y
    }
}

pub struct Text {
    pub position: cgmath::Vector2<f32>,
    pub color: wgpu::Color,
    pub text: String,
    pub visible: bool,
    pub focused: bool,
}