From 4fb356822ef98241d2e44b0b0bd31d7f214f9f20 Mon Sep 17 00:00:00 2001
From: lamp
Date: Sun, 5 Mar 2023 21:27:40 +0000
Subject: init

---
 src/vec2.rs | 52 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 52 insertions(+)
 create mode 100644 src/vec2.rs

(limited to 'src/vec2.rs')

diff --git a/src/vec2.rs b/src/vec2.rs
new file mode 100644
index 0000000..077433a
--- /dev/null
+++ b/src/vec2.rs
@@ -0,0 +1,52 @@
+use auto_ops::{impl_op_ex, impl_op_ex_commutative};
+
+#[derive(Clone)]
+pub struct Vec2<T> {
+    pub x: T,
+    pub y: T,
+}
+
+impl Vec2<f64> {
+    pub fn new() -> Vec2<f64> {
+        Vec2 { x: 0.0, y: 0.0 }
+    }
+
+    pub fn rotate(&mut self, radians: f64) {
+        *self = Vec2 {
+            x: self.x * radians.cos() - self.y * radians.sin(),
+            y: self.x * radians.sin() + self.y * radians.cos(),
+        };
+    }
+
+    pub fn length_squared(&self) -> f64 {
+        self.x * self.x + self.y * self.y
+    }
+
+    pub fn length(&self) -> f64 {
+        self.length_squared().sqrt()
+    }
+
+    pub fn as_usize(&self) -> Vec2<usize> {
+        Vec2 {
+            x: self.x as usize,
+            y: self.y as usize,
+        }
+    }
+}
+
+impl_op_ex!(+ |lhs: &Vec2<f64>, rhs: &Vec2<f64>| -> Vec2<f64> { Vec2 { x: lhs.x + rhs.x, y: lhs.y + rhs.y } });
+impl_op_ex!(-|lhs: &Vec2<f64>, rhs: &Vec2<f64>| -> Vec2<f64> {
+    Vec2 {
+        x: lhs.x - rhs.x,
+        y: lhs.y - rhs.y,
+    }
+});
+impl_op_ex!(+= |lhs: &mut Vec2<f64>, rhs: &Vec2<f64>| { *lhs = Vec2 { x: lhs.x + rhs.x, y: lhs.y + rhs.y } });
+impl_op_ex!(-= |lhs: &mut Vec2<f64>, rhs: &Vec2<f64>| { *lhs = Vec2 { x: lhs.x - rhs.x, y: lhs.y - rhs.y } });
+impl_op_ex_commutative!(*|lhs: &Vec2<f64>, rhs: &f64| -> Vec2<f64> {
+    Vec2 {
+        x: lhs.x * rhs,
+        y: lhs.y * rhs,
+    }
+});
+impl_op_ex!(/ |lhs: &Vec2<f64>, rhs: &f64| -> Vec2<f64> { lhs * (1.0 / rhs) });
-- 
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