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GLSL pointers!

Started by golgoth Sep 23, 2005 at 3:00 PM 1 reply 6k views

Original Post

Sep 23, 2005 at 3:00 PM

Hi all! its me again! is there anyways to verify if a texture id exist? Abstract:


uniform sampler2D texture;

void main()
{
	vec4 a = vec4(0,0,0,0);
	vec4 b = vec4(1,1,1,1);

	if (texture == NULL)
	{
		gl_FragColor = a;
	}
	else
	{
		gl_FragColor = b;
	}
}

failed to compile so far! THX

_the_phantom_

496

_the_phantom_

Sep 23, 2005 at 5:40 PM

samplers are not pointers.
GLSL doesnt have pointers.
Uniforms default to zero if they arent changed by the host application.

tbh, You are asking questions which could be answered if you took the time to learn GLSL properly. Tutorial links in the FAQ can help with this, however the 'Orange Book' (a buy link exists in the FAQ as well) is the best source of infomation you are going to find on it.

golgoth

Author

golgoth

Sep 23, 2005 at 6:21 PM

alright!

im on it!

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