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DarkBASIC Professional Discussion / set object cull

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Terabyte
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Posted: 29th Jun 2003 16:17
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just wondered
i take it you only need to write set object cull object number,1 once at the start to make object 1 constantly not draw away facing polygons.

I take it i dont need to put it in the loop to update the polyogns it hides.
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IanM
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Posted: 29th Jun 2003 16:19 Edited at: 29th Jun 2003 16:20
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Right!

... unless you delete it and re-create it, then you need to reset it.
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Terabyte
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Posted: 29th Jun 2003 16:51
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hmm

i dont think culling an object makes much of a diference

i just told my computer to record the frames per second in the loop

i copyed and patsed the results into excel

this is what i got...



arnt i sad

anyway

anyone wana tell me why

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IanM
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Posted: 29th Jun 2003 17:36
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It's because DBPro has that type of culling enabled by default.

If you are trying this to get a speed-up, I'm afraid you'll not be able to get it faster than it is without reducing the number of poly's in your object.

However, Update 5 will include a new octree system that should give you an increase in speed, by automatically reducing the number of poly's that are passed to DirectX for rendering (it clips those that cannot be seen by the camera).
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Shadow Robert
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Posted: 29th Jun 2003 18:29
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lol .. its smoother with culling off...
but still as IanM said, Dx has a built in culling to not render any triangles not facing the camera any more than 91.0­°



I pride myself that i don't kill... well not without a good reason
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APEXnow
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Posted: 29th Jun 2003 21:52 Edited at: 29th Jun 2003 21:53
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The only reason for using culling off is if you're using a skybox/skysphere, or you are ghosting objects, in which case, you need to see the opposite facing pollies! Speed comparisons on most modern hardware accelerators are pretty insignificant.

MSI/AMD Athlon 1300, 256Mb, 60GbHD, SoundBlaster Live!, GeForce 4 MX440-64Mb, Win2K, DX9, DarkBASIC Pro(PUv4.1)
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Terabyte
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Posted: 13th Jul 2003 13:38
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yeah thats great coming from sombody with a gforce 4

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APEXnow
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Posted: 14th Jul 2003 12:26
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LOL, hmm, is that a good or a bad thing? <scratching noddle>

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Terabyte
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Posted: 17th Jul 2003 15:06
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hehe good for you bad for me

But the idea of culling is that polygons that are not visible to the camera are not drawn if this is the case dark basic pro should work faster. From the graphs this is not the case.So can i conclude that this command doesnt work. cananyonegive me a program where it has worke

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