Raylib 3D FPS with models

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

extern crate lazy_static;

mod lights;

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 generate_mesh(&self, thread: &RaylibThread) -> Mesh {
        Mesh::gen_mesh_cube(thread, 2.0, self.height, 2.0)
    }
}

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];
    let mut column_meshes: Vec<Mesh> = Vec::with_capacity(20);
    for column in columns.into_iter() {
        column_meshes.push(
            column.generate_mesh(&thread)
        )
    }
    let mut column_models: Vec<Model> = Vec::with_capacity(20);

    for (index, _) in columns.into_iter().enumerate() {
        let mesh = &column_meshes[index];
        column_models.push(
            rl.load_model_from_mesh(&thread, mesh).unwrap()
        )
    }
    let mesh: Mesh = columns[0].generate_mesh(&thread);
    let model: Model = rl.load_model_from_mesh(&thread, &mesh).unwrap();
    // Borrow models vec to use in the loop
    let models = &column_models;

    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_mode_3D(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 (index, model) in models.into_iter().enumerate() {
                let position = columns[index].position;
                let color = columns[index].color;
                d2.draw_model(&model, position, 1.0, color);
            }
        }
        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);
    }
}


//     Finished dev [unoptimized + debuginfo] target(s) in 0.56s
//      Running `target/debug/vicarious-raylib`
// INFO: Initializing raylib 2.5
// INFO: Display device initialized successfully
// INFO: Display size: 1920 x 1080
// INFO: Render size: 1280 x 720
// INFO: Screen size: 1280 x 720
// INFO: Viewport offsets: 0, 0
// INFO: GLAD: OpenGL extensions loaded successfully
// INFO: OpenGL 3.3 Core profile supported
// INFO: GPU: Vendor:   Intel Open Source Technology Center
// INFO: GPU: Renderer: Mesa DRI Intel(R) UHD Graphics 620 (Kabylake GT2)
// INFO: GPU: Version:  4.5 (Core Profile) Mesa 19.2.7
// INFO: GPU: GLSL:     4.50
// INFO: Number of supported extensions: 210
// INFO: [EXTENSION] DXT compressed textures supported
// INFO: [EXTENSION] ETC2/EAC compressed textures supported
// INFO: [EXTENSION] Anisotropic textures filtering supported (max: 16X)
// INFO: [TEX ID 1] Texture created successfully (1x1 - 1 mipmaps)
// INFO: [TEX ID 1] Base white texture loaded successfully
// INFO: [SHDR ID 1] Shader compiled successfully
// INFO: [SHDR ID 2] Shader compiled successfully
// INFO: [SHDR ID 3] Shader program loaded successfully
// INFO: [SHDR ID 3] Default shader loaded successfully
// INFO: Internal buffers initialized successfully (CPU)
// INFO: Internal buffers uploaded successfully (GPU)
// INFO: OpenGL default states initialized successfully
// INFO: [TEX ID 2] Texture created successfully (128x128 - 1 mipmaps)
// INFO: [TEX ID 2] Default font loaded successfully
// INFO: [VAO ID 2] Mesh uploaded successfully to VRAM (GPU)
// INFO: [VAO ID 3] Mesh uploaded successfully to VRAM (GPU)
// INFO: [VAO ID 4] Mesh uploaded successfully to VRAM (GPU)
// INFO: [VAO ID 5] Mesh uploaded successfully to VRAM (GPU)
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// INFO: [VAO ID 21] Mesh uploaded successfully to VRAM (GPU)
// INFO: [VAO ID 22] Mesh uploaded successfully to VRAM (GPU)
// INFO: Target time per frame: 16.667 milliseconds
// INFO: [VAO ID 22] Unloaded model data from VRAM (GPU)
// INFO: Unloaded model data from RAM and VRAM
// double free or corruption (!prev)
// fish: “cargo run” terminated by signal SIGABRT (Abort)