MikeDucker

4 ms·

1. 1.▲
   by MikeDucker 14y ago

   I think that's excellent advice, which I'll take if I end up using box2D in the end :)
2. 2.▲
   by MikeDucker 14y ago

   I would follow the steps again (I am genuinely interested in learning why it does what it does), but I ripped out the scaling factor a few days ago and reintroducing it in the hope that the same thing happens would be a lot of work, hence a
3. 3.▲
   by MikeDucker 14y ago

   I remember being told a long time ago by our graphics programmer that the result of a floating point operation might be different depending on the state of the FPU. A quick internet search brings up things like this: http://www.codercorner
4. 4.▲
   by MikeDucker 14y ago

   I have certainly not had a bug that so plainly highlights this before. If it had been a bug about a more complex calculation than ( 4.0 * 0.1 ) / 0.1 I wouldn't have thought it worth mentioning. The fact that calc generally does result in a
5. 5.▲
   by MikeDucker 14y ago

   I'm glad one person appreciates my main sin is ban punnery, with a minor in forgetting floating point gotchas. I feel like someone who just told an anecdote about a time they slipped over whilst running and now everyone assumes they never k
6. 6.▲
   by MikeDucker 14y ago

   It's because I'm using ints for position data to allow fast look-ups of nearby objects in a very simple 2D environment. It's not about the speed of the same calculations between floats and ints (if that's what you were wondering).
7. 7.▲
   by MikeDucker 14y ago

   Ah, I see. I'll update my post. Thanks.
8. 8.▲
   by MikeDucker 14y ago

   I see what you're saying, but if you take the 111011 as representing 1/2 1/4 1/8 etc. then it does equal 0.921875. I'm presuming that this value is added onto 1 (fiddling with the tick boxes confirms this) to be used as the mantissa. I'm no
9. 9.▲
   by MikeDucker 14y ago

   Are you saying that a floating point value just under 4 won't necessarily cast to 3 or something else? (I'm reading the above posted links, but am intrigued at what I've gotten wrong with my statement you quoted)
10. 10.▲
    by MikeDucker 14y ago

    Hi acqq, I did type 123 into that float converter and the numbers I got back are what I posted. I'm not sure how we're getting different FP reps for the same number. I simply typed 123 into the decimal representation box. If I'm missing som
11. 11.▲
    by MikeDucker 14y ago

    Thanks, that'll be very useful. I can quite blatantly do with learning more.
12. 12.▲
    by MikeDucker 14y ago

    I never suggested this was a bug in how floating point works. I only meant I had a bug and it was due to my use of floats and how it bit me in the ass :) I am still a little surprised (but not that surprised) that essentially 4.0 * 0.1 (and
13. 13.▲
    Indie game developer start-up interview #4, Rodeo Games(mikeducker.wordpress.com)

    5 points by MikeDucker 14y ago|0 comments
14. 14.▲
    More game developer start-up experiences(mikeducker.wordpress.com)

    18 points by MikeDucker 14y ago|1 comments