Split Vec3.

[mandelwow.git] / support / vec3.rs

diff --git a/support/vec3.rs b/support/vec3.rs
new file mode 100644 (file)
index 0000000..85d3cc3
--- /dev/null
+++ b/support/vec3.rs
@@ -0,0 +1,42 @@
+extern crate glutin;
+
+use std::f32;
+use std::ops::Add;
+use std::ops::AddAssign;
+use std::ops::Sub;
+use std::ops::Mul;
+
+#[derive(Default, PartialEq, Debug, Clone, Copy)]
+pub struct Vec3 (pub f32, pub f32, pub f32);
+
+impl Add for Vec3 {
+    type Output = Vec3;
+    fn add(self, other: Vec3) -> Vec3 {
+        Vec3(self.0 + other.0, self.1 + other.1, self.2 + other.2)
+    }
+}
+
+impl AddAssign for Vec3 {
+    fn add_assign(&mut self, other: Vec3) {
+        *self = Vec3(self.0 + other.0, self.1 + other.1, self.2 + other.2)
+    }
+}
+
+impl Sub for Vec3 {
+    type Output = Vec3;
+    fn sub(self, other: Vec3) -> Vec3 {
+        Vec3(self.0 - other.0, self.1 - other.1, self.2 - other.2)
+    }
+}
+
+impl Mul<f32> for Vec3 {
+    type Output = Vec3;
+    fn mul(self, f: f32) -> Vec3 {
+        Vec3(self.0 * f, self.1 * f, self.2 * f)
+    }
+}
+
+pub fn norm(v: &Vec3) -> Vec3 {
+    let len = (v.0 * v.0 + v.1 * v.1 + v.2 * v.2).sqrt();
+    Vec3(v.0 / len, v.1 / len, v.2 / len)
+}