Which is recommended/standard? unsigned shorts or unsigned int indices?

Graphics and GPU Programming Programming

Started by jakesee November 13, 2010 04:56 AM

3 comments, last by Washu 13 years, 5 months ago

100

Author

November 13, 2010 04:56 AM

Hi,

Pretty much as the title says:
Which is the recommended/standard? unsigned shorts or unsigned int indices?

I would think that with the current tech, unsigned integers would be fully supported but I still find some cards on existing laptops require unsigned shorts.

Is there a place I can look up the latest dx/ogl docs for these kind of issue. I googled a bit and I do get some pdfs, but i cannot determine whether they are the latest.

Thanks.

==============================================Rage - Really Amateurish Graphics Engine Collada Parser / Serializer

Hodgman

52,717

November 13, 2010 05:41 AM

For the sake of not wasting memory, you should use shorts unless you actually need ints (i.e. more than 65k verts).

. 22 Racing Series .

foobarbazqux

197

November 13, 2010 04:09 PM

Pierre Boudier works for ATI and says to use shorts
Link

jakesee

100

Author

November 14, 2010 02:31 AM

@Hodgman
I just wanted to know so I can decide whether a mesh-resource-file should indicate whether it is using ushorts or uints so as to support both.

@foobarbazqux
Pierre's post was back in march, hopefully nothing much has changed. If ushorts is indeed better then I think I should impose the file format rule that vertex count be max of 65k...

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Thanks thanks.

==============================================Rage - Really Amateurish Graphics Engine Collada Parser / Serializer

Washu

7,836

November 14, 2010 03:00 AM

Quote:Original post by jakesee
@Hodgman
I just wanted to know so I can decide whether a mesh-resource-file should indicate whether it is using ushorts or uints so as to support both.

@foobarbazqux
Pierre's post was back in march, hopefully nothing much has changed. If ushorts is indeed better then I think I should impose the file format rule that vertex count be max of 65k...

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Thanks thanks.

Not a particularly sane limitation, and its fairly easy for large models to exceed that...

Just support both and either use the number of indices or a flag to indicate which a model should use.

In time the project grows, the ignorance of its devs it shows, with many a convoluted function, it plunges into deep compunction, the price of failure is high, Washu's mirth is nigh.

Which is recommended/standard? unsigned shorts or unsigned int indices?

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