mod view;
mod global;
mod calculus;
mod camera;
mod object;
mod interval;

use crate::calculus::calculus::Point3;
use crate::global::*;
use crate::camera::Camera;
use crate::object::{HittableList, Sphere};
use crate::view::{render_viewer, View};

fn main() {
    let mut display_buffer: DisplayBuffer = [[Pixel::default(); IMG_WIDTH]; IMG_HEIGHT];
    let mut world = HittableList::new();

    world.push(
        Sphere::new(Point3::new(0.0, 0.0, -1.0), 0.5)
    );

    world.push(
        Sphere::new(Point3::new(0.0, -100.5, -1.0), 100.0)
    );

    let camera = Camera::new();

    // test_render(&mut display_buffer);
    camera.render(&mut display_buffer, &world);


    let view = View {
        display_buffer: &display_buffer,
        // viewer: render_viewer::ppm_exporter,
        viewer: render_viewer::png_exporter,
    };
    view.display();
}

fn test_render(data: &mut DisplayBuffer) {
    (0..IMG_HEIGHT).for_each(|j| {
        (0..IMG_WIDTH).for_each(|i| {
            let r = i as f32 / IMG_WIDTH as f32;
            let g = j as f32 / IMG_HEIGHT as f32;
            let b = 0.0f32;

            data[j][i] = Pixel::from_frac(r, g, b);
        })
    });
}