ecmascript:

function initialize ()
{
    computePointArray ();
    
    hide ();

    tracePrint ('initialization() successful');
}
function computePointArray ()
{
    if ((imagePixelHeight <= 0) || (imagePixelWidth <= 0))
    {
        tracePrint ('cannot compute new scale, imagePixelHeight=' + imagePixelHeight.toString() + ', imagePixelWidth=' + imagePixelWidth.toString());
        return;
    }
    else if (imagePixelHeight < imagePixelWidth)
    {
        height = imagePixelHeight/imagePixelWidth;
        width  = 1.0;
    }
    else if (imagePixelHeight > imagePixelWidth)
    {
        height = 1.0;
        width  = imagePixelWidth/imagePixelHeight;
    }
    else // same
    {
        height = 1.0;
        width  = 1.0;
    }
    p0 = new SFVec3f (0.0,   0.0,    0.0);
    p1 = new SFVec3f (0.0,   height, 0.0);
    p2 = new SFVec3f (width, height, 0.0);
    p3 = new SFVec3f (width, 0.0,    0.0);
    pointArray = new MFVec3f (p0, p1, p2, p3);
    tracePrint ('computed new ImageCoordinate.point=' + pointArray.toString());
    
    if (hidden)
    {
        hideSwitchChoice = -1;
    }
}
function set_imagePixelHeight (eventValue)
{
    computePointArray ();
}
function set_imagePixelWidth (eventValue)
{
    computePointArray ();
}

function set_name (eventValue)
{
   // input eventValue received for inputOutput field
    name = eventValue;
}
function hide ()
{
    // input eventValue received for inputOutput field
    tracePrint ("set_hidden: hidden=" + hidden);
    if (hidden)
    {
         hideSwitchChoice      = -1;
         displayViewpointGroup = false;
    }
    else
    {
        hideSwitchChoice      = 0;
        displayViewpointGroup = true;
    }
}

function set_hidden (eventValue)
{
    hidden = eventValue;
    hide ();
}
// ================== Trace output functions ==================

function tracePrint (outputString)
{
   // if traceEnabled is true, print outputString on X3D browser console
   if (traceEnabled)
      Browser.println ('[TimelineElementScript ' + name.toString() + ': ' + outputString.toString() + ']');
}
function alwaysPrint (outputString)
{
      // always print outputString on X3D browser console
      Browser.println ('[TimelineElementScript ' + name.toString() + ': ' + outputString.toString() + ']');
}
function set_traceEnabled (eventValue)
{
      // input eventValue received for inputOutput field
      traceEnabled = eventValue;
}
// ===========================================================