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DarkBASIC Discussion / Pb: "Play object" and forced-timing

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Kelebrindae
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Posted: 30th Jul 2004 00:17
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Hi! Here's my problem:

In my code, I use forced-timing. This means that the sync rate is set to zero. I store the duration of each loop, and the variations of this duration give me a factor which allow me to "weight" each movement of the existing objects. This way, a fast computer will have a higher framerate than a slow one, but my objects won't move faster, but more smoothly.

Then, I noticed a problem with the "play object" command: it seems to be "framerate-related". An animation sequence will be faster if the framerate is high. And, of course, this is bad in forced-timing: animation speed should be "time-related" (its duration, in seconds or milliseconds, should never change).

Maybe I could use the "set object speed" command to modulate the animation speed? And this, at each loop to accomodate the framerate variations?

Please, if anyone already had this problem, could you tell me how to solve it?

Thanks a lot!

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Kentaree
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Posted: 30th Jul 2004 00:36
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There is a command called set object frame, which lets you manually select a frame in an objects animation sequence, so you could manually manage the animation, based on your program's timing.

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Kelebrindae
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Posted: 30th Jul 2004 01:05
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Yes, it's a good idea. I'll try it. Thanks a lot!

But by default, the "set object frame" doesn't perform interpolation between the former frame and the new one. So, the animation could become choppy.

There's a "set object interpolation" to use in conjonction with "set object frame", but it's based on framerate, just like "play object" => same problem...

Another idea ?

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BearCDPOLD
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Posted: 30th Jul 2004 05:33
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In the source box I put a useful post somebody brought up on the subject.

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AsriCE
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Location: Brunei
Posted: 30th Jul 2004 15:44
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Halo,

Kelebrindae, I believe the corrrect term for the method you are using is called "Independent Frame-Rate Movement". Forced timing is a method which you control how many times a function is to be called per-frame.

Back to subject, you said you store the duration for the loops and it computes the duration which is the "Factor", am I right? So then I believe that this factor is your "DeltaTime", which you multiply to the velocity to give it's position.

eq 1:


So then, why don't you just use the "Set Object Speed" command and multiply it by the DeltaTime, just as you would with moving all other objects?

eq 2:


I use this method with my previous two projects, and it works perfectly. But I don't know if your algorithm is the same as mine. Maybe you can post your code so we can help you more.

AsriCE Crew,
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Kelebrindae
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Posted: 30th Jul 2004 18:44
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Thanks a lot, guys!

I should be able to fix the problem, now...

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