Hooray for keystates!

Posted by AtkinsSJ (twitter: @AtkinsSJ)

August 30th, 2009 6:15 am

Shows how much of a noob I am really, but I just discovered that SDL lets you check keystates at any time, not just when a keypress event is raised. This makes the movement code much, much simpler. Currently attempting to let you jump, which currently conflicts horribly with the code that stops you falling through the floor… Wait a minute! I think I’ve cracked it! I just need to do a check if the vertical velocity is negative! Yay!

Tags: SDL

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This entry was posted on Sunday, August 30th, 2009 at 6:15 am and is filed under LD #15 - Caverns - 2009. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.

4 Responses to “Hooray for keystates!”

1. Jonny D says:

   August 30, 2009 at 7:45 am

   I mentioned this elsewhere already, but you might get some use out of StickyInput:
   http://code.bluedinosaurs.com/SDL.html

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   • AtkinsSJ says:

     August 30, 2009 at 8:22 am

     Cool, thanks. I might stick that in later if I get time.

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2. LunarCrisis says:

   August 30, 2009 at 9:02 am

   If you just check for negative velocity you’ll be able to keep jumping as long as you’re moving upwards XD

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   • AtkinsSJ says:

     August 30, 2009 at 9:19 am

     Yeah, it checks for solid ground before jumping. It’s just that I have a second piece of code which was basically

     If there is no square beneath you, fall
     Else, snap to the ground.

     Which stopped you being able to leave the ground. Using a grid system with a smooth-movement system is complicated. *_*

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