1 files changed, 62 insertions, 0 deletions
diff --git a/stockton-input/src/axis.rs b/stockton-input/src/axis.rs
new file mode 100644
index 0000000..ebf52bb
--- /dev/null
+++ b/stockton-input/src/axis.rs
@@ -0,0 +1,62 @@
+/*
+ * Copyright (C) Oscar Shrimpton 2020
+ *
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation, either version 3 of the License, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+use std::fmt::Debug;
+use std::ops::{Deref, DerefMut};
+
+#[derive(Debug, Clone)]
+/// A linear axis, usually with a value from -1 to 1.
+pub struct Axis(i8);
+
+impl Axis {
+    /// Get a new instance with the value set to zero
+    pub fn zero() -> Self {
+        Axis(0)
+    }
+
+    /// Get the normalized value, ie always positive.
+    pub fn normalized(&self) -> i8 {
+        if self.0 < 0 {
+            -self.0
+        } else {
+            self.0
+        }
+    }
+
+    pub fn modify(&mut self, val: i8) {
+        self.0 += val
+    }
+}
+
+impl Default for Axis {
+    fn default() -> Self {
+        Self::zero()
+    }
+}
+
+impl Deref for Axis {
+    type Target = i8;
+    fn deref(&self) -> &Self::Target {
+        &self.0
+    }
+}
+
+impl DerefMut for Axis {
+    fn deref_mut(&mut self) -> &mut Self::Target {
+        &mut self.0
+    }
+}