How to read mouse movement from WM _ input?
Processing WM_INPUT messages is more complicated than processing WM_MOUSEMOVE messages, but WM_INPUT messages are read directly from the Human Interface Device (HID) stack and reflect high-definition results. To read mouse movement data from the WM_INPUT message, the device must first be registered; the following code provides an example of this:
What’s the advantage of Wm _ MouseMove in Win32?
The advantage to WM_MOUSEMOVE, however, is that Windows applies pointer acceleration (also known as ballistics) to the raw mouse data, which makes the mouse pointer behave as customers expect. This makes WM_MOUSEMOVE the preferred option for pointer control (over WM_INPUT or DirectInput), since it results in more natural behavior for users.
What are the advantages and disadvantages of Wm _ input?
The advantage to using WM_INPUT is that your game receives raw data from the mouse at the lowest level possible. The disadvantage is that WM_INPUT has no ballistics applied to its data, so if you want to drive a cursor with this data, extra effort will be required to make the cursor behave like it does in Windows.
What to do with WM _ input message winuser.h?
Input occurred while the application was not in the foreground. A HRAWINPUT handle to the RAWINPUT structure that contains the raw input from the device. To get the raw data, use this handle in the call to GetRawInputData. If an application processes this message, it should return zero.
How to get high definition mouse movement data?
And then the DirectInput mouse device can be read each frame: Overall, the best method to receive high-definition mouse movement data is WM_INPUT. If your users are just moving a mouse pointer, then consider using WM_MOUSEMOVE to avoid needing to perform pointer ballistics.
When does the mouse generate an input event?
The mouse generates an input event when the user moves the mouse, or presses or releases a mouse button. The system converts mouse input events into messages and posts them to the appropriate thread’s message queue. When mouse messages are posted faster than a thread can process them, the system discards all but the most recent mouse message.