toki/rust-render
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Finished diffuse shading calculations

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This commit is contained in:
bijan2005 2021-01-24 10:23:59 -05:00
parent 20c32fc467
commit 6ef2c65009
7 changed files with 65 additions and 171 deletions
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20
src/render.rs
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@ -1,5 +1,6 @@
extern crate nalgebra as na;
use std::f32::consts::PI;
use std::cmp::Ordering;
use na::*;
@ -15,11 +16,26 @@ fn trace(ray: Ray, objects: &Vec<Object>) -> Option<(&Object, f32)> {
.min_by(|a, b| a.1.partial_cmp(&b.1).unwrap_or(Ordering::Equal))
}
fn light_point(objects: &Vec<Object>, obj: &Object, point: Point3f, light: &dyn Light) -> Color {
if light.check_shadow(point, objects) {
let texture = obj.gettexture(point);
light.getcolor(point) * (texture.albedo / PI) * light.intensity(point) * obj.normal(point).dot(&*light.direction(point))
} else {
// Point is in shadow
Color::black()
}
}
pub fn cast_ray(ray: Ray, scene: &Scene) -> Color {
if let Some((obj, dist)) = trace(ray, &scene.objects) {
let point = ray.project(dist);
let surface_texture = obj.gettexture(point);
surface_texture.color
let surface_color = obj.gettexture(point).color;
scene.lights.iter()
.map(|light| light_point(&scene.objects, obj, point, &**light))
.fold(Color::black(), |acc, c| acc + c) * surface_color
}
else { scene.background }
}