stream world data from pxl8d to pxl8

pxl8d/src/math.rs

@@ -0,0 +1,42 @@
+use core::ops::{Add, Mul, Sub};
+
+#[derive(Clone, Copy, Default)]
+pub struct Vec3 {
+    pub x: f32,
+    pub y: f32,
+    pub z: f32,
+}
+
+impl Vec3 {
+    pub const ZERO: Self = Self { x: 0.0, y: 0.0, z: 0.0 };
+    pub const Y: Self = Self { x: 0.0, y: 1.0, z: 0.0 };
+
+    pub const fn new(x: f32, y: f32, z: f32) -> Self {
+        Self { x, y, z }
+    }
+
+    pub fn dot(self, rhs: Self) -> f32 {
+        self.x * rhs.x + self.y * rhs.y + self.z * rhs.z
+    }
+}
+
+impl Add for Vec3 {
+    type Output = Self;
+    fn add(self, rhs: Self) -> Self {
+        Self::new(self.x + rhs.x, self.y + rhs.y, self.z + rhs.z)
+    }
+}
+
+impl Sub for Vec3 {
+    type Output = Self;
+    fn sub(self, rhs: Self) -> Self {
+        Self::new(self.x - rhs.x, self.y - rhs.y, self.z - rhs.z)
+    }
+}
+
+impl Mul<f32> for Vec3 {
+    type Output = Self;
+    fn mul(self, rhs: f32) -> Self {
+        Self::new(self.x * rhs, self.y * rhs, self.z * rhs)
+    }
+}