[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: Max size of 3d texture

Subject: Re: Max size of 3d texture
From: Paul Sargent <email@hidden>
Date: Thu, 25 Oct 2007 14:05:29 +0100
Delivered-to: email@hidden
Delivered-to: email@hidden
Dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=beta; h=domainkey-signature:received:received:in-reply-to:references:mime-version:content-type:message-id:cc:content-transfer-encoding:from:subject:date:to:x-mailer; bh=iJ+paJdSp5vVggGzhRDRCQyQpmmI9cTiZ91HiaNDWP0=; b=sJ24shdLp6AGPVoNQPxk/qZlg7AT0QV3j6XdpOCDDfYY4raysbnOJ5QIbmuw48ytVOPMkqwYOA6FyJWcRqMXEbO0MjcWOn/qUmJyJ5KIVu6iad2e/FXc1MchX1knU1m2JGgKf9Ufs/rn8c7vtqtm7KlA04w4oCKyRdcnIbEAwpA=
Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=received:in-reply-to:references:mime-version:content-type:message-id:cc:content-transfer-encoding:from:subject:date:to:x-mailer; b=pdY8QNcfNGxukiOiCaQAt++ef3wRir5auhWa7wgLBI8cWPXYKjdaGf9ezILuDEvRsna78vPTGfgORpDUXJB1Eb4v7OBku8khMJL4CoARnjXZEwTqKEyIY6riWvkKyRrtHAGs9XKx3YJNWT9VHU/i6IaGiZE9ZFJZHughYkjLlaQ=

On 22 Oct 2007, at 17:38, John Stiles wrote:

On Oct 22, 2007, at 3:02 AM, Mark wrote:

128x128x128 is actually much more than I need, I'll probably just need about 40x40x40, which for float32 is 1MB. So video memory should really be no problem - I'm more concerned about the best format to use for the 3d texture, the format that will give best speed.
I really don't know, but I wouldn't be surprised if you need to round up to power-of-two sizes, so you might need to use 64x64x64.


Which makes it 4MB, just to be clear.

Smaller component size nearly always means faster, it'a just less data to fetch from memory (and texture caches work better). I suggest it probably comes down to what you can get away with for your algorithm, and what hardware you're targeting. Remember that 8 bits can take you -1.0 to 1.0 in less than 0.01 size steps with a bit of re-scale/biasing. _______________________________________________ Do not post admin requests to the list. They will be ignored. Mac-opengl mailing list (email@hidden) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/mac-opengl/email@hidden

This email sent to email@hidden

Follow-Ups:
- Re: Max size of 3d texture
  - From: Mark <email@hidden>

References:
	>Re: Max size of 3d texture (From: Mark <email@hidden>)
	>Re: Max size of 3d texture (From: Stefan Dösinger <email@hidden>)
	>Re: Max size of 3d texture (From: Mark <email@hidden>)
	>Re: Max size of 3d texture (From: John Stiles <email@hidden>)

Prev by Date: Re: Checking shader optimizations
Next by Date: Re: Checking shader optimizations
Previous by thread: Re: Max size of 3d texture
Next by thread: Re: Max size of 3d texture
Index(es):
- Date
- Thread

Home