Updated documentation.

lib/include/gainput/GainputDebugRenderer.h

@@ -6,13 +6,22 @@ namespace gainput
 {
 
 /// Interface for debug rendering of input device states.
+/**
+ * Coordinates and other measures passed to the interface's functions are in the
+ * range of 0.0f to 1.0f.
+ *
+ * The functions are called as part InputManager::Update().
+ */
 class GAINPUT_LIBEXPORT DebugRenderer
 {
 public:
+	/// Called to draw a circle with the given radius.
 	virtual void DrawCircle(float x, float y, float radius) = 0;
 
+	/// Called to draw a line between the two given points.
 	virtual void DrawLine(float x1, float y1, float x2, float y2) = 0;
 
+	/// Called to draw some text at the given position.
 	virtual void DrawText(float x, float y, const char* const text) = 0;
 };
 

lib/include/gainput/GainputInputDevice.h

@@ -143,7 +143,9 @@ class GAINPUT_LIBEXPORT InputDevice
 	/// Returns the device's previous state, probably best if only used internally.
 	InputState* GetPreviousInputState() { return previousState_; }
 
+	/// Returns the previously set dead zone for the given button or 0.0f if none was set yet.
 	float GetDeadZone(DeviceButtonId buttonId) const;
+	/// Sets the dead zone for the given button.
 	void SetDeadZone(DeviceButtonId buttonId, float value);
 
 	/// Enable/disable debug rendering of this device.

lib/include/gainput/GainputInputDeviceBuiltIn.h

@@ -25,7 +25,7 @@ enum BuiltInButton
 
 class InputDeviceBuiltInImpl;
 
-/// An input device for inputs that are directly built into the executing device.
+/// An input device for inputs that are directly built into the executing device (for example, sensors in a phone).
 class GAINPUT_LIBEXPORT InputDeviceBuiltIn : public InputDevice
 {
 public: