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|
use std::{collections::HashMap, path::Path, sync::Arc};
use config::File;
use serde::Deserialize;
use crate::{
error::TracerError,
geometry::{sphere::Sphere, Hittable},
material::{dialectric::Dialectric, lambertian::Lambertian, metal::Metal, SharedMaterial},
vec3::{Color, Vec3},
};
pub struct Scene {
objects: Vec<Box<dyn Hittable>>,
}
impl Scene {
#[allow(dead_code)]
pub fn new() -> Self {
Self {
objects: Vec::new(),
}
}
#[allow(dead_code)]
pub fn add(&mut self, hittable: Box<dyn Hittable>) {
self.objects.push(hittable);
}
pub fn from_file<P: AsRef<Path>>(file: P) -> Result<Self, TracerError> {
SceneData::from_file(file)?.try_into()
}
}
impl Hittable for Scene {
fn hit(
&self,
ray: &crate::ray::Ray,
t_min: f64,
t_max: f64,
) -> Option<crate::geometry::HitRecord> {
let mut rec = None;
let mut closes_so_far = t_max;
for obj in self.objects.iter() {
if let Some(hit_rec) = obj.hit(ray, t_min, closes_so_far) {
closes_so_far = hit_rec.t;
rec = Some(hit_rec);
}
}
rec
}
}
#[derive(Debug, Deserialize)]
enum MaterialData {
Lambertian { color: Color },
Metal { color: Color, fuzz: f64 },
Dialectric { refraction_index: f64 },
}
#[derive(Debug, Deserialize)]
enum GeometryData {
Sphere {
pos: Vec3,
radius: f64,
material: String,
},
}
#[derive(Deserialize)]
struct SceneData {
materials: HashMap<String, MaterialData>,
geometry: Vec<GeometryData>,
}
impl SceneData {
pub fn from_file<P: AsRef<Path>>(file: P) -> Result<Self, TracerError> {
config::Config::builder()
.add_source(File::from(file.as_ref()))
.build()
.map_err(|e| {
TracerError::Configuration(
file.as_ref().to_string_lossy().into_owned(),
e.to_string(),
)
})?
.try_deserialize()
.map_err(|e| {
TracerError::Configuration(
file.as_ref().to_string_lossy().into_owned(),
e.to_string(),
)
})
}
}
impl TryInto<Scene> for SceneData {
type Error = TracerError;
fn try_into(self) -> Result<Scene, TracerError> {
let mut materials: HashMap<String, SharedMaterial> = HashMap::new();
self.materials
.into_iter()
.for_each(|(id, material)| match material {
MaterialData::Lambertian { color } => {
materials.insert(id, Arc::new(Box::new(Lambertian::new(color))));
}
MaterialData::Metal { color, fuzz } => {
materials.insert(id, Arc::new(Box::new(Metal::new(color, fuzz))));
}
MaterialData::Dialectric { refraction_index } => {
materials.insert(id, Arc::new(Box::new(Dialectric::new(refraction_index))));
}
});
let geometry: Vec<Box<dyn Hittable>> = self
.geometry
.into_iter()
.map(|geo| match geo {
GeometryData::Sphere {
pos,
radius,
material,
} => materials
.get(&material)
.ok_or(TracerError::UnknownMaterial(material))
.map(|mat| {
let apa: Box<dyn Hittable> =
Box::new(Sphere::new(pos, radius, Arc::clone(mat)));
apa
}),
})
.collect::<Result<Vec<Box<dyn Hittable>>, TracerError>>()?;
Ok(Scene { objects: geometry })
}
}
|
