custom textures

[makc]

subj :)

[makc]

oh yes, demo link 🍃

[koreus7]

Bump! This is very cool. would love to see this merged.

Should they be upside down though or do I just not understand sampler 2D?

precision mediump float;

uniform vec2 resolution;
uniform sampler2D rings; // http://i.imgur.com/tVVAVLL.jpg
void main( void ) {

    gl_FragColor = texture2D( rings, ( gl_FragCoord.xy / resolution.xy ) );

}

This example makes the upside down thing more obvious

[makc]

you can do gl.pixelStorei (gl.UNPACK_FLIP_Y_WEBGL, xxx) to flip it the way you want to.

[makc]

actually, why not add it, indeed...

[makc]

ok done, but... crap:

This branch has conflicts that must be resolved

[makc]

ha, so github does understand forced push )

[makc]

I guess @mrdoob would merge this way faster if I did not use dick pic as example 😉

[hermanbanken]

Just use some other picture: head

[makc]

@hermanbanken well, maybe @mrdoob hates the idea any way. you know, like in old demoscene days, using bitmaps instead of code was frowned upon

[koreus7]

Maybe @mrdoob doesn't want glslsandbox to turn into Shader Toy. Also links to images could go dead meaning more broken shaders.

PS: Would be cool to see some shaders that mimic oldskool demoscene stuff.

[mrdoob]

Hmm, the issue is that this wouldn't scale and it would increase the shader size considerably...

[makc]

@mrdoob if you use data url, yes. but, as you see, imgur url works just as good

[makc]

@mrdoob and, in fact, any other host that allows cross-domain access