jit.gl.slab example with 3 textures?
Hi,
Is it possible to make 3 textures enter a jit.gl.slab object? (for, say, a 3-texture mixer, or a 2-texture mixer with LUT color mapping).
Do you know of any Jitter-based example available? I haven't found one yet...
Thanks,
Jean-François.
Hi Jean-François,
You can make a N-textures mixer by streaming them one after another (patch below) and if you have an arbitrary number of them, you can use a poly~ and send the output of each voice to the next.
If you need a custom process with more than 2 texture, I think you'd better off using jit.gl.pix (though you cannot use shader file).
You can export shader file from jit.gl.pix (and load them in a slab), but I am not aware that the opposite is possible.
- Vincent
Great, thanks for that, merci Vincent.
I don't need the poly~ tip at this point, but it's a great one (what can you not do with poly~).
to answer your original question, here is a simple slab that sums 3 inputs. use @inputs 3 in your slab box to create the necessary inlets.
<jittershader name="default">
<description> Default Slab </description>
<param name="tex0" type="int" default="0" />
<param name="tex1" type="int" default="1" />
<param name="tex2" type="int" default="2" />
<language name="glsl" version="1.0">
<bind param="tex0" program="fp" />
<bind param="tex1" program="fp" />
<bind param="tex2" program="fp" />
<program name="vp" type="vertex">
<![CDATA[
varying vec2 texcoord0;
varying vec2 texcoord1;
varying vec2 texcoord2;
void main (void)
{
gl_Position = ftransform();
texcoord0 = vec2(gl_TextureMatrix[0] * gl_MultiTexCoord0);
texcoord1 = vec2(gl_TextureMatrix[1] * gl_MultiTexCoord0);
texcoord2 = vec2(gl_TextureMatrix[2] * gl_MultiTexCoord0);
}
]]>
</program>
<program name="fp" type="fragment">
<![CDATA[
varying vec2 texcoord0;
varying vec2 texcoord1;
varying vec2 texcoord2;
uniform sampler2DRect tex0;
uniform sampler2DRect tex1;
uniform sampler2DRect tex2;
void main(void)
{
gl_FragColor = texture2DRect(tex0, texcoord0) + texture2DRect(tex1, texcoord1) +texture2DRect(tex2, texcoord2);
}
]]>
</program>
</language>
</jittershader>Thanks for that! @inputs 3, that's what I should have figured!