Just making tiny improvements to things.

src/dawn/input/_InputManager.hpp

@@ -96,6 +96,19 @@ namespace Dawn {
         }
       }
 
+      float_t getAxis(inputbind_t negative, inputbind_t positive) {
+        return -getValue(negative) + getValue(positive);
+      }
+
+      glm::vec2 getAxis2D(
+        inputbind_t negativeX,
+        inputbind_t positiveX,
+        inputbind_t negativeY,
+        inputbind_t positiveY
+      ) {
+        return glm::vec2(getAxis(negativeX, positiveX), getAxis(negativeY, positiveY));
+      }
+
       /**
        * Returns true if the given bind is currently being pressed (a non-zero
        * value).