Mailing Lists: Apple Mailing Lists
Image of Mac OS face in stamp
 
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: Cg noise()

NVIDIA release notes for GLSL says something to the effect that noise always returns a constant, not sure it this is at all true for Cg but most (if not all) hardware currently little to no noise support. You maybe able to search the web for Cg noise support and get some info. Most shaders I see currently use a 3D noise texture for noise support on hardware that does not provide a noise function.

Geoff Stahl
3D Software Engineer
Apple

On Mar 26, 2005, at 5:52 AM, Joshua 'Schwa' Gargus wrote:

Hi,

I'm trying to use the Cg Standard Library noise() function,
but it seems to always return zero.  I don't have access to
a PC right now, so I can't tell if this is a Mac issue.

Here's my test fragment shader:

void main(in float4 inColor : COLOR, out float4 outColor : COLOR)
{
    float3 intensity = abs(noise(2100)) * 10;
    outColor = float4(intensity, 1);
}

_______________________________________________
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
References: 
 >Cg noise() (From: "Joshua 'Schwa' Gargus" <email@hidden>)



Visit the Apple Store online or at retail locations.
1-800-MY-APPLE

Contact Apple | Terms of Use | Privacy Policy

Copyright © 2007 Apple Inc. All rights reserved.