webcamFirst.glsl

void main () {
    // we put the pixel coordinates in a variable for easy access
    vec2 pos = uvN();
    
    // here we get the webcam texture from channel0 which we assigned in the texture
    // panel (the lil gradient icon)
    // we use the pixel coordinates to grab the right pixel
    vec4 web =texture2D(channel0,pos);
    
    // here we just add the pixels postition as a color, just for fun
    // here vec4(pos,pos) is shorthand for vec4(pos.x,pos.y,pos.x,pos.y)
    vec4 col = web + vec4(pos,pos);

    gl_FragColor = col ;
    
}