Return random X,Y where X,Y = A

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jmnetogamedev

  • I need to pick a random x,y where the value is equal to 0. But, I need to return the x,y values, not the item value. (This is for spawning a sprite based on a tilemap where the tilemap frame is = 0)

    I have a solution already, but I'm imagining there is a loop I could do that would be a lot cleaner.

    My solution:

  • I never use waits when I can. 

    On function getXY
While
— set myX to int(random(300))
— set myY to int(random(400))
— array: at (myX,myY) =0
— — stop loop

    The only issue is it will loop forever if there are no 0s in the array. It also could take a while if there only a few 0s. Depending on how robust you want it you could have it try random places first, then make a list of all the locations with zero and pick one at random, and lastly if there are no zeros you could set the variables to -1 or nan or something.

  • Got that going. Appreciate the feedback. I've gotten a lot better with arrays and loops over the years, but they always make my head hurt. (As for the waits, I try not to use them. This is on a load screen so I'll probably give it a random time or trigger off a logo animation.)

    Thanks again!

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  • 113000 out of 114600 and the random works in under 1 second still. Just an fyi (computers are really amazing).

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