1 files changed, 0 insertions, 70 deletions
diff --git a/src/scene/shapes/sphere.rs b/src/scene/shapes/sphere.rs
deleted file mode 100644
index eaa6625..0000000
--- a/src/scene/shapes/sphere.rs
+++ /dev/null
@@ -1,70 +0,0 @@
-//! Implements sphere
-//!
-//! Spheres are relatively easy to calculate intersections between
-use crate::Float;
-use crate::core::{Ray, Vector3f, Hittable, Intersection};
-
-pub struct Sphere {
-    radius: Float,
-    center: Vector3f,
-}
-
-impl Sphere {
-    pub fn new(radius: Float, center: Vector3f) -> Sphere {
-        Sphere {
-            radius,
-            center,
-        }
-    }
-
-    fn norm_at(&self, point: &Vector3f) -> Vector3f {
-        let mut v = *point - self.center;
-        v /= self.radius;
-        v
-    }
-}
-
-impl Hittable for Sphere {
-    // Implementation from ray tracing in a weekend
-    fn intersect(&self, ray: &Ray) -> Option<Intersection> {
-        let oc = ray.origin - self.center;
-        let a = ray.direction.len_squared();
-        let half_b = oc.dot(&ray.direction);
-        let c = oc.len_squared() - self.radius * self.radius;
-        let disc = half_b*half_b - a*c;
-
-        if disc < 0.0 {
-            return None
-        } else {
-            let distance = (-half_b - disc.sqrt()) / a;
-            if distance < 0.0 {
-                return None
-            }
-            let w = ray.at(distance);
-            Some(Intersection {
-                n: self.norm_at(&w),
-                p: w,
-                t: distance,
-            })
-        }
-
-    }
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    #[test]
-    fn sphere_intersect() {
-        let sph = Sphere::new(2.0, Vector3f::new_xyz(2.0, 3.0, 4.0));
-
-        let ray = Ray {
-            origin: Vector3f::new_xyz(1.0, 0.0, 0.0),
-            direction: Vector3f::new_xyz(0.0, 1.0, 1.5).norm(),
-        };
-
-        let dist = sph.intersect(&ray).unwrap();
-        assert!((dist.t - 3.28).abs() < 0.01);
-    }
-}