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Re: GLSL texture lookups in shader builder

Subject: Re: GLSL texture lookups in shader builder
From: tobias ford <email@hidden>
Date: Mon, 30 May 2005 18:38:03 -0500
Delivered-to: email@hidden
Delivered-to: email@hidden

OK. So it basically was some user error and a GLSL misunderstanding on my part. I'm still not able to grab anything from the second texture unit, though. I have a texture defined for texture units 0 and 1. Both have "enabled" checked and are clamped to edge.

To the best of my knowledge the program below should pass through the second unit texture, but It's always using the first texture.

uniform sampler2D texture0;
uniform sampler2D texture1;

void main()
{
    vec4 pixel0 = texture2D(texture0, gl_TexCoord[0].st);
    vec4 pixel1= texture2D(texture1, gl_TexCoord[0].st);
    gl_FragColor = pixel1;
}

Am I doing this correctly, or is this a bug in Shader Builder?

-------------------
Tobias Ford...
tobias1482 'at' mac.com
tford 'at' soe.sony.com
-------------------
Programmer @ SOE Austin for Star Wars Galaxies

On May 29, 2005, at 11:16 AM, Geoff Stahl wrote:

Create a sampler type uniform. Use shader builders normal methods to set this value to the desired value. Shader Builder does not currently support multiple passes with code defined uniforms (or similar schemes). I be missing what you are trying to do but the above is the general way to get texture unit ids into a shader.
Geoff Stahl
3D Software Engineer
Apple
On May 29, 2005, at 5:10 AM, tobias ford wrote:
I'm just now starting to play around with Shader Builder and GLSL and I'm trying to just write a pass-through shader with multiple textures to start.

What is it that I need to do in regards to getting a texture sampler. Since these are named from code, I was wondering if SB had some default name specified that I could use in the lookup.

I also don't recall seeing any generic way to access this by texture unit in the orange book.
Thanks.
-------------------
Tobias Ford...
tobias1482 'at' mac.com
tford 'at' soe.sony.com
-------------------
Programmer @ SOE Austin for Star Wars Galaxies
She's so swishy in her satin and tat
In her frock coat and bipperty-bopperty hat
Oh God, I could do better than that
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Follow-Ups:
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References:
	>Re: Motion Blur at 30 fps (From: Lorenzo Puleo <email@hidden>)
	>GLSL texture lookups in shader builder (From: tobias ford <email@hidden>)
	>Re: GLSL texture lookups in shader builder (From: Geoff Stahl <email@hidden>)

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