1 files changed, 58 insertions, 0 deletions
diff --git a/src/utils.rs b/src/utils.rs
new file mode 100644
index 0000000..57ccf13
--- /dev/null
+++ b/src/utils.rs
@@ -0,0 +1,58 @@
+#[derive(Clone, Debug, PartialEq)]
+pub enum Cardinal {
+    North,
+    South,
+    West,
+    East,
+}
+
+impl Cardinal {
+    pub fn turn_cw(&self) -> Self {
+        match self {
+            Self::North => Self::East,
+            Self::South => Self::West,
+            Self::West => Self::North,
+            Self::East => Self::South,
+        }
+    }
+
+    pub fn turn_ccw(&self) -> Self {
+        match self {
+            Self::North => Self::West,
+            Self::South => Self::East,
+            Self::West => Self::South,
+            Self::East => Self::North,
+        }
+    }
+
+    pub fn dir(&self) -> glam::Vec3 {
+        match self {
+            Self::North => glam::Vec3::new(0.0, 1.0, 0.0),
+            Self::South => glam::Vec3::new(0.0, -1.0, 0.0),
+            Self::West => glam::Vec3::new(-1.0, 0.0, 0.0),
+            Self::East => glam::Vec3::new(1.0, 0.0, 0.0),
+        }
+    }
+
+    pub fn offsets(&self) -> (i32, i32) {
+        match self {
+            Self::North => (0, 1),
+            Self::South => (0, -1),
+            Self::West => (-1, 0),
+            Self::East => (1, 0),
+        }
+    }
+
+    pub fn angle(&self) -> f32 {
+        match self {
+            Self::North => 0.0,
+            Self::South => std::f32::consts::PI,
+            Self::West => 3.0 * std::f32::consts::PI / 2.0,
+            Self::East => std::f32::consts::PI / 2.0,
+        }
+    }
+}
+
+pub fn lerp(a: f32, b: f32, t: f32) -> f32 {
+    a + t.clamp(0.0, 1.0) * (b - a)
+}