3d_camera_first_person.rs

use arr_macro::arr;
use rand::prelude::*;
use raylib::prelude::*;

const WINDOW_WIDTH: i32 = 1280;
const WINDOW_HEIGHT: i32 = 720;

struct Column {
    height: f32,
    position: Vector3,
    color: Color,
}

impl Column {
    fn create_random() -> Column {
        let mut rng = rand::thread_rng();
        let height: f32 = rng.gen_range(1.0, 12.0);
        let position = Vector3::new(
            rng.gen_range(-15.0, 15.0),
            height / 2.0,
            rng.gen_range(-15.0, 15.0),
        );
        let color = Color::new(rng.gen_range(20, 255), rng.gen_range(10, 55), 30, 255);

        Column {
            height,
            position,
            color,
        }
    }
}

fn main() {
    let (mut rl, thread) = raylib::init()
        .size(WINDOW_WIDTH, WINDOW_HEIGHT)
        .title("Hello, world!")
        .build();

    let mut camera = Camera3D::perspective(
        Vector3::new(4.0, 2.0, 4.0),
        Vector3::new(0.0, 1.8, 0.0),
        Vector3::new(0.0, 1.0, 0.0),
        60.0,
    );
    let columns: [Column; 20] = arr![Column::create_random(); 20];

    rl.set_camera_mode(&camera, CameraMode::CAMERA_FIRST_PERSON);
    rl.set_target_fps(60);

    while !rl.window_should_close() {
        rl.update_camera(&mut camera);

        let mut d = rl.begin_drawing(&thread);

        d.clear_background(Color::DARKGREEN);
        {
            let mut d2 = d.begin_mode3D(camera);

            d2.draw_plane(
                Vector3::new(0.0, 0.0, 0.0),
                Vector2::new(32.0, 32.0),
                Color::LIGHTGRAY,
            );
            d2.draw_cube(Vector3::new(-16.0, 2.5, 0.0), 1.0, 5.0, 32.0, Color::BLUE);
            d2.draw_cube(Vector3::new(16.0, 2.5, 0.0), 1.0, 5.0, 32.0, Color::LIME);
            d2.draw_cube(Vector3::new(0.0, 2.5, 16.0), 32.0, 5.0, 1.0, Color::GOLD);

            for column in columns.iter() {
                d2.draw_cube(column.position, 2.0, column.height, 2.0, column.color);
                d2.draw_cube_wires(column.position, 2.0, column.height, 2.0, Color::MAROON);
            }
        }
        d.draw_rectangle(10, 10, 220, 70, Color::SKYBLUE);
        d.draw_rectangle_lines(10, 10, 220, 70, Color::BLUE);
        d.draw_text(
            "First person camera default controls:",
            20,
            20,
            10,
            Color::BLACK,
        );
        d.draw_text("- Move with keys: W, A, S, D", 40, 40, 10, Color::DARKGRAY);
        d.draw_text("- Mouse move to look around", 40, 60, 10, Color::DARKGRAY);
    }
}