[SDL] MouseMotion

Engines and Middleware Programming

Started by VitaliBR July 04, 2010 10:39 PM

1 comment, last by VitaliBR 13 years, 9 months ago

147

Author

July 04, 2010 10:39 PM

Hi!

I searched a lot about, but found nothing detailed about the function SDL_MOUSEMOTION.

I know he provides four values, they being the mouse position absolute (x and y) and x and y relative.
But do not get it until now, it is this value 'relative' of X and Y?

Neither the SDL documentation explains

Thanks

http://mateusvitali.wordpress.com/

magorian

100

July 05, 2010 07:30 AM

The relative value is relative to the cursors last position. So if the user moved his cursor 10 pixels to the right, the relative X value of the event would be 10. If he moved the cursor 15 pixels to the left, and 26 pixels down the relative X would be -15 and the relative Y would be 26.

Hope this helps :)

"Buy heaps of coffee, Coffee is a boon to all programmers." - elegantmoron

VitaliBR

147

Author

July 05, 2010 09:26 AM

Thanks! I understand.

I'm trying to use this function to move(w/ mouse) my camera with OpenGL.
If anyone know any tutorial or example of how to do this thanks.

http://mateusvitali.wordpress.com/