1 files changed, 27 insertions, 17 deletions

diff --git a/src/calculus.rs b/src/calculus.rs
index 677230e..40caff8 100644
--- a/src/calculus.rs
+++ b/src/calculus.rs
@@ -1,19 +1,15 @@
 pub mod calculus {
-    // struct Vec3Cache {
-    //     mag: Option<f64>,
-    //     mag_sql: Option<f64>,
-    //     unit: Option<Vec3>,
-    // }
-
     pub struct Vec3 {
-        pub x: f64,
-        pub y: f64,
-        pub z: f64,
+        pub x: f32,
+        pub y: f32,
+        pub z: f32,
         // cached: Vec3Cache,
     }
 
+    pub type Point3 = Vec3;
+
     impl Vec3 {
-        pub fn new(x: f64, y: f64, z: f64) -> Self {
+        pub fn new(x: f32, y: f32, z: f32) -> Self {
             Self { x, y, z }
         }
 
@@ -33,21 +29,23 @@ pub mod calculus {
             }
         }
 
-        pub fn scalar_mul(&mut self, multiplier: f64) {
-            self.x *= multiplier;
-            self.y *= multiplier;
-            self.z *= multiplier;
+        pub fn scalar_mul(&self, multiplier: f32) -> Self {
+            Self {
+                x: self.x * multiplier,
+                y: self.y * multiplier,
+                z: self.z * multiplier,
+            }
         }
 
-        pub fn mag_sqr(&self) -> f64 {
+        pub fn mag_sqr(&self) -> f32 {
             self.x * self.x + self.y * self.y + self.z * self.z
         }
 
-        pub fn mag(&self) -> f64 {
+        pub fn mag(&self) -> f32 {
             self.mag_sqr().sqrt()
         }
 
-        pub fn dot_prod(&self, other: &Self) -> f64 {
+        pub fn dot_prod(&self, other: &Self) -> f32 {
             self.x * other.x + self.y * other.y + self.z * other.z
         }
 
@@ -68,4 +66,16 @@ pub mod calculus {
             }
         }
     }
+
+    pub struct Ray {
+        pub origin: Point3,
+        pub direction: Vec3,
+    }
+
+    impl Ray {
+        pub fn at(&self, t: f32) -> Point3 {
+            // Get parametric location
+            self.origin.add(&self.direction.scalar_mul(t))
+        }
+    }
 }
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