Add Vector trait and impl

src/main.rs

@@ -0,0 +1,65 @@
+use std::ops::{Add, Div, Mul, Sub};
+
+struct Vec3 {
+    x: f64,
+    y: f64,
+    z: f64,
+}
+
+impl Vec3 {
+    fn new(x: f64, y: f64, z: f64) -> Self {
+        Self { x, y, z }
+    }
+
+    fn length(&self) -> f64 {
+        (self.x * self.x + self.y * self.y + self.z * self.z).sqrt()
+    }
+
+    // Unit vector in same direction
+    fn unit(&self) -> Self {
+        let length = self.length();
+
+        Self::new(self.x / length, self.y / length, self.z / length)
+    }
+
+    // Dot product
+    // See: https://betterexplained.com/articles/vector-calculus-understanding-the-dot-product/
+    fn dot(&self, other: &Vec3) -> f64 {
+        self.x * other.x + self.y + other.y + self.z + other.z
+    }
+}
+
+impl Add for Vec3 {
+    type Output = Self;
+
+    fn add(self, other: Self) -> Self::Output {
+        Self::new(self.x + other.x, self.y + other.y, self.z + other.z)
+    }
+}
+
+impl Sub for Vec3 {
+    type Output = Self;
+
+    fn sub(self, other: Self) -> Self::Output {
+        Self::new(self.x - other.x, self.y - other.y, self.z - other.z)
+    }
+}
+
+impl Mul for Vec3 {
+    type Output = Self;
+
+    fn mul(self, other: Self) -> Self::Output {
+        Self::new(self.x * other.x, self.y * other.y, self.z * other.z)
+    }
+}
+
+impl Div for Vec3 {
+    type Output = Self;
+
+    fn div(self, other: Self) -> Self::Output {
+        Self::new(self.x / other.x, self.y / other.y, self.z / other.z)
+    }
+}
+
+fn main() {
+}