LScript - Image_Shutter

LScript (Layout) adds a projector style flicker to an animation.

Compatible with Newtek LightWave 9.6 and above.

// LScript Image Filter - www.StephenCulley.co.uk
//
// web   address: http://www.stephenculley.co.uk
// email address: email@stephenculley.co.uk

/* 
    LScript Image Filter - Shutter

    Image_Shutter.ls

*/

@version 2.5
@warnings
@script image
@name *Shutter

    // Title
    sTitle = "*Shutter";

    // Version
    sVersion = "v1.0";

    nAmount = 0.2;

create
{
    setdesc(sTitle + " : " + nAmount);
}

process: ifo
{
    iProgress = ifo.height;
    if(runningUnder() != SCREAMERNET) moninit(iProgress);
    nShutter = randu() * nAmount;
    for(i = 1;i <= ifo.height;++i)
      {
      for(j = 1;j <= ifo.width;++j)
        {
        ifo.red[j,i] = ifo.red[j,i] - nShutter;
        ifo.green[j,i] = ifo.green[j,i] - nShutter;
        ifo.blue[j,i] = ifo.blue[j,i] - nShutter;
        }    
      if(runningUnder() != SCREAMERNET) if(monstep()) return;
      }
}

load: what,io
{
    if(what == SCENEMODE)
    {
        nAmount = io.read().asNum();
        setdesc(sTitle + " : " + nAmount);
    }
}

save: what,io
{
    if(what == SCENEMODE)
    {
        io.writeln(nAmount);
    }
}

options
{
    reqbegin(sTitle + " " + sVersion);

    // Control
    ctrl_c0 = ctlnumber("Amount",nAmount);

    // Developer
    ctlsep();
    ctrl_dev0 = ctltext("","developer: Stephen Culley","http://www.stephenculley.co.uk");

    return if !reqpost();

    nAmount = getvalue(ctrl_c0);

    setdesc(sTitle + " : " + nAmount);

    reqend();
}

All scripts available at my Google Drive at
https://drive.google.com/open?id=1cR_q2GVUAJHumic1-A3eXV16acQnVTWs