Struct truster::camera::Camera

pub struct Camera { /* fields omitted */ }

Represents a camera which can be used together with an instance of crate::world::World to render a scene.

Implementations

impl Camera

pub fn new(cfg: Config) -> Self

Returns a new Camera corresponding to cfg.

pub fn ray_for_pixel(&self, x: usize, y: usize) -> Ray

Returns a ray for the pixel at the given coordinates.

Examples

Constructing a ray through the center of the canvas

use std::f64::consts::PI;
use truster::ray::Ray;
use truster::tuple::Tuple;

let camera = Camera::new(Config {
    hsize: 201,
    vsize: 101,
    fov: PI / 2.0,
    ..Config::default()
});
let ray = camera.ray_for_pixel(100, 50);
// ray == Ray::new(Tuple::point(0.0, 0.0, 0.0), Tuple::vector(0.0, 0.0, -1.0))); // approximately

pub fn render(&self, world: &World) -> Canvas

Renders the world to a canvas as seen from self and returns it.