1 files changed, 87 insertions, 0 deletions
diff --git a/racer-tracer/src/scene/random.rs b/racer-tracer/src/scene/random.rs
new file mode 100644
index 0000000..ddbcfc1
--- /dev/null
+++ b/racer-tracer/src/scene/random.rs
@@ -0,0 +1,87 @@
+use std::sync::Arc;
+
+use crate::{
+    error::TracerError,
+    geometry::{sphere::Sphere, Hittable},
+    material::{dialectric::Dialectric, lambertian::Lambertian, metal::Metal, SharedMaterial},
+    scene::SceneLoader,
+    util::{random_double, random_double_range},
+    vec3::{Color, Vec3},
+};
+
+pub struct Random {}
+
+impl Random {
+    pub fn new() -> Self {
+        Self {}
+    }
+}
+
+impl SceneLoader for Random {
+    fn load(&self) -> Result<Vec<Box<dyn crate::geometry::Hittable>>, TracerError> {
+        let mut geometry: Vec<Box<dyn Hittable>> = Vec::new();
+        let ground_material: SharedMaterial =
+            Arc::new(Box::new(Lambertian::new(Color::new(0.5, 0.5, 0.5))));
+        geometry.push(Box::new(Sphere::new(
+            Vec3::new(0.0, -1000.0, 0.0),
+            1000.0,
+            ground_material,
+        )));
+
+        for a in -11..11 {
+            for b in -11..11 {
+                let choose_mat = random_double();
+                let center = Vec3::new(
+                    a as f64 + 0.9 * random_double(),
+                    0.2,
+                    b as f64 + 0.9 * random_double(),
+                );
+
+                if (center - Vec3::new(4.0, 0.2, 0.0)).length() > 0.9 {
+                    if choose_mat < 0.8 {
+                        // diffuse
+                        let albedo = Color::random() * Color::random();
+                        let mat: SharedMaterial = Arc::new(Box::new(Lambertian::new(albedo)));
+                        geometry.push(Box::new(Sphere::new(center, 0.2, mat)));
+                    } else if choose_mat > 0.95 {
+                        // metal
+                        let albedo = Color::random_range(0.5, 1.0);
+                        let fuzz = random_double_range(0.0, 0.5);
+                        let mat: SharedMaterial = Arc::new(Box::new(Metal::new(albedo, fuzz)));
+                        geometry.push(Box::new(Sphere::new(center, 0.2, mat)));
+                    } else {
+                        // glass
+                        let mat: SharedMaterial = Arc::new(Box::new(Dialectric::new(1.5)));
+                        geometry.push(Box::new(Sphere::new(center, 0.2, mat)));
+                    }
+                }
+            }
+        }
+
+        let dial_mat: SharedMaterial = Arc::new(Box::new(Dialectric::new(1.5)));
+        geometry.push(Box::new(Sphere::new(
+            Vec3::new(0.0, 1.0, 0.0),
+            1.0,
+            dial_mat,
+        )));
+
+        let lamb_mat: SharedMaterial =
+            Arc::new(Box::new(Lambertian::new(Color::new(0.4, 0.2, 0.1))));
+        geometry.push(Box::new(Sphere::new(
+            Vec3::new(-4.0, 1.0, 0.0),
+            1.0,
+            lamb_mat,
+        )));
+
+        let metal_mat: SharedMaterial =
+            Arc::new(Box::new(Metal::new(Color::new(0.7, 0.6, 0.5), 0.0)));
+
+        geometry.push(Box::new(Sphere::new(
+            Vec3::new(4.0, 1.0, 0.0),
+            1.0,
+            metal_mat,
+        )));
+
+        Ok(geometry)
+    }
+}