rtiow: break project into multiple workspaces.

rtiow/renderer/src/scenes/bench.rs

@@ -0,0 +1,78 @@
+use log::trace;
+use rand;
+use rand::Rng;
+
+use crate::bvh::BVH;
+use crate::camera::Camera;
+use crate::hitable::Hit;
+use crate::hitable_list::HitableList;
+use crate::kdtree::KDTree;
+use crate::material::Lambertian;
+use crate::renderer::Opt;
+use crate::renderer::Scene;
+use crate::sphere::Sphere;
+use crate::texture::ConstantTexture;
+use crate::vec3::Vec3;
+
+pub fn new(opt: &Opt) -> Scene {
+    let lookfrom = Vec3::new(20., 20., 20.);
+    let lookat = Vec3::new(0., 0., 0.);
+    let dist_to_focus = (lookfrom - lookat).length();
+    let aperture = 0.1;
+    let time_min = 0.;
+    let time_max = 1.;
+    let camera = Camera::new(
+        lookfrom,
+        lookat,
+        Vec3::new(0., 1., 0.),
+        70.,
+        opt.width as f32 / opt.height as f32,
+        aperture,
+        dist_to_focus,
+        time_min,
+        time_max,
+    );
+    let mut rng = rand::thread_rng();
+    let mut grid: Vec<Box<dyn Hit>> = Vec::new();
+    let len = 1000;
+    for x in 0..len {
+        for z in 0..len {
+            let r = rng.gen_range(0., 1.);
+            let g = rng.gen_range(0., 1.);
+            let b = rng.gen_range(0., 1.);
+
+            let x_pos = (x - len / 2) as f32 + rng.gen_range(-0.1, 0.1);
+            let z_pos = (z - len / 2) as f32 + rng.gen_range(-0.1, 0.1);
+
+            grid.push(Box::new(Sphere::new(
+                Vec3::new(x_pos, 0., z_pos),
+                0.5,
+                Lambertian::new(ConstantTexture::new(Vec3::new(r, g, b))),
+            )));
+        }
+    }
+    let world: Box<dyn Hit>;
+    if opt.use_accel {
+        let use_kd = true;
+        if use_kd {
+            let kdtree = KDTree::new(grid, time_min, time_max);
+            trace!("k-d tree world {}", kdtree);
+            world = Box::new(kdtree);
+        } else {
+            let bvh = BVH::new(grid, time_min, time_max);
+            trace!("BVH world {}", bvh);
+            world = Box::new(bvh);
+        }
+    } else {
+        world = Box::new(HitableList::new(grid));
+    }
+    Scene {
+        camera,
+        world,
+        subsamples: opt.subsamples,
+        num_threads: opt.num_threads,
+        width: opt.width,
+        height: opt.height,
+        ..Default::default()
+    }
+}