rtiow: make hitables an enum of various types.

rtiow/renderer/src/bvh_triangles.rs

@@ -120,7 +120,7 @@ impl<M> BVHTriangles<M>
 where
     M: Material,
 {
-    pub fn new(stl: &STL, material: M) -> BVHTriangles<M> {
+    pub fn new(stl: &STL, material: M, scale_factor: f32) -> BVHTriangles<M> {
         let now = std::time::Instant::now();
 
         assert_eq!(std::mem::size_of::<BVHNode>(), 32);
@@ -129,9 +129,9 @@ where
             .triangles
             .iter()
             .map(|t| {
-                let v0 = t.verts[0];
-                let v1 = t.verts[1];
-                let v2 = t.verts[2];
+                let v0 = t.verts[0] * scale_factor;
+                let v1 = t.verts[1] * scale_factor;
+                let v2 = t.verts[2] * scale_factor;
                 let centroid = (v0 + v1 + v2) * div3;
                 Triangle {
                     centroid,

rtiow/renderer/src/parser.rs

@@ -1,5 +1,7 @@
 use crate::{
+    bvh_triangles::BVHTriangles,
     camera::Camera,
+    cuboid::Cuboid,
     hitable::Hit,
     hitable_list::HitableList,
     material::Lambertian,
@@ -8,7 +10,8 @@ use crate::{
     texture::{EnvMap, Texture},
 };
 use serde::Deserialize;
-use std::path::PathBuf;
+use std::{fs::File, io::BufReader, path::PathBuf, sync::Arc};
+use stl::STL;
 use thiserror::Error;
 use vec3::Vec3;
 
@@ -16,7 +19,7 @@ use vec3::Vec3;
 pub struct Config {
     scene: SceneConfig,
     camera: CameraConfig,
-    spheres: Vec<SphereConfig>,
+    hitables: Vec<HitableConfig>,
     envmap: Option<EnvMapConfig>,
 }
 
@@ -24,6 +27,10 @@ pub struct Config {
 pub enum ConfigError {
     #[error("failed to load image")]
     ImageError(#[from] image::ImageError),
+    #[error("failed to parser STL")]
+    STLError(#[from] stl::ParseError),
+    #[error("I/O error")]
+    IOError(#[from] std::io::Error),
 }
 
 impl TryFrom<Config> for Scene {
@@ -34,15 +41,34 @@ impl TryFrom<Config> for Scene {
         // name in the object's config.
         let material = Lambertian::new([1., 0., 0.]);
 
-        let spheres: Vec<Box<dyn Hit>> = c
-            .spheres
-            .iter()
-            .map(|sc| -> Box<dyn Hit> {
-                Box::new(Sphere::new(sc.center, sc.radius, material.clone()))
+        let hitables: Result<Vec<Box<dyn Hit>>, Self::Error> = c
+            .hitables
+            .into_iter()
+            .map(|hc| -> Result<Box<dyn Hit>, Self::Error> {
+                match hc {
+                    HitableConfig::Sphere { center, radius } => {
+                        Ok(Box::new(Sphere::new(center, radius, material.clone())))
+                    }
+                    HitableConfig::Cuboid { min, max } => Ok(Box::new(Cuboid::new(
+                        min.into(),
+                        max.into(),
+                        Arc::new(material.clone()),
+                    ))),
+                    HitableConfig::STL { path, scale } => {
+                        let r = BufReader::new(File::open(path)?);
+                        let stl = STL::parse(r, false)?;
+                        Ok(Box::new(BVHTriangles::new(
+                            &stl,
+                            material.clone(),
+                            scale.unwrap_or(1.),
+                        )))
+                    }
+                }
             })
             .collect();
+        let hitables = hitables?;
 
-        let world: Box<dyn Hit> = Box::new(HitableList::new(spheres));
+        let world: Box<dyn Hit> = Box::new(HitableList::new(hitables));
         let mut env_map: Option<EnvMap> = None;
 
         if let Some(em) = c.envmap {
@@ -92,9 +118,14 @@ struct SceneConfig {
 }
 
 #[derive(Debug, Deserialize)]
-struct SphereConfig {
-    center: [f32; 3],
-    radius: f32,
+#[serde(tag = "type")]
+enum HitableConfig {
+    #[serde(rename = "sphere")]
+    Sphere { center: [f32; 3], radius: f32 },
+    #[serde(rename = "cuboid")]
+    Cuboid { min: [f32; 3], max: [f32; 3] },
+    #[serde(rename = "stl")]
+    STL { path: PathBuf, scale: Option<f32> },
 }
 
 #[derive(Debug, Deserialize)]

rtiow/renderer/src/scenes/dragon.rs

@@ -87,7 +87,7 @@ pub fn new(opt: &Opt) -> Scene {
         // STL Mesh
         Box::new(crate::debug_hit::DebugHit::new(RotateY::new(
             Translate::new(
-                Scale::new(BVHTriangles::new(&stl_cube, dragon_material), 250.),
+                BVHTriangles::new(&stl_cube, dragon_material, 250.),
                 [0., -10., 0.],
             ),
             180.,

rtiow/renderer/src/scenes/stltest.rs

@@ -91,7 +91,7 @@ pub fn new(opt: &Opt) -> Scene {
         )),
         // STL Mesh
         Box::new(Translate::new(
-            BVHTriangles::new(&stl_cube, glass),
+            BVHTriangles::new(&stl_cube, glass, 1.),
             [0., 10., 0.],
         )),
         //Box::new(BVHTriangles::new(&stl_cube, box_material.clone())),

rtiow/tracer/configs/test.toml

@@ -4,7 +4,7 @@ height = 768
 #subsamples = 1000
 
 [camera]
-lookfrom = [0.0, 10.0, -100.0]
+lookfrom = [0.0, 30.0, -100.0]
 lookat = [0.0, 0.0, 0.0]
 fov = 45
 aspect = 1
@@ -13,15 +13,18 @@ focus_dist = 10.0
 time_min = 0.0
 time_max = 1.0
 
-[[spheres]]
-center = [0.0, 0.0, 0.0]
-radius = 10
-[[spheres]]
+[[hitables]]
+type = "cuboid"
+min = [-10.0, -10.0, -10.0]
+max = [10.0, 10.0, 10.0]
+[[hitables]]
+type = "sphere"
 center = [30.0, 0.0, 0.0]
 radius = 10
-[[spheres]]
-center = [-30.0, 0.0, 0.0]
-radius = 10
+[[hitables]]
+type = "stl"
+path = "/net/nasx.h.xinu.tv/x/3dprint/stl/stanford_dragon.stl"
+scale = 200
 
 [envmap]
 path = "/home/wathiede/src/xinu.tv/raytracers/rtiow/renderer/images/52681723945_e1d94d3df9_6k.jpg"