ecmascript:
function initialize () // CameraScript
{
//  tracePrint ('initialize start...');

    NavInfoNode.avatarSize[0]   = nearClipPlane;

    // remaining setups deferred to invocation of checkShots() method
    // thanks to Yvonne Jung Fraunhofer for diagnosing better approach to function initialization
    alwaysPrint ('initialize complete');
}

function checkShots (eventValue)
{
    tracePrint ('checkShots() method should only occur after initialize() methods in all other Scripts are complete');

    // compute totalDuration by summing durations from contained CameraShot and CameraMovement nodes
    totalDuration= 0;
    shotCount  = shots.length;
    movesCount = 0;
    for (i = 0; i < shotCount; i++) // shots index
    {
       tracePrint ('shots[' + i + '].moves.length=' + shots[i].moves.length);
       movesCount   += shots[i].moves.length;
       totalDuration = totalDuration + shots[i].shotDuration;
       if (shots[i].moves.length == 0)
       {
          alwaysPrint ('warning: CameraShot[' + i + '][' + shots[i].description + '] has no contained CameraMove nodes');
       }
    }
    // size checks before proceeding
    if (shotCount == 0)
    {
       alwaysPrint ('warning: no CameraShot nodes found for the shots, nothing to do!');
       return;
    }
    else if (movesCount == 0)
    {
       alwaysPrint ('warning: no CameraMove nodes found for the shots, nothing to do!');
       return;
    }
    else if (totalDuration == 0)
    {
       alwaysPrint ('warning: totalDuration = 0 seconds, nothing to do!');
       return;
    }
    tracePrint ('number of contained CameraShot nodes=' + shotCount);
    tracePrint ('number of contained CameraMove nodes=' + movesCount);
    tracePrint ('totalDuration=' + totalDuration + ' seconds for all shots and moves');

    // compute interpolators
    var k = 0; // index for latest key, keyValuePosition, keyValueOrientation
    for (i = 0; i < shotCount; i++) // shots index
    {
        if (i==0) // initial entries
        {
           key[0]                   = 0.0; // no previous move
           keyValuePosition[0]      = shots[i].initialPosition;
           keyValueOrientation[0]   = shots[i].initialOrientation;
        }
        else     // new shot repositions, reorients camera as clean break from preceding shot/move
        {
           key[k+1]                 = key[k]; // start from end from previous move
           keyValuePosition[k+1]    = shots[i].initialPosition;
           keyValueOrientation[k+1] = shots[i].initialOrientation;
           k++;
        }
        tracePrint (shots[i].description);
        tracePrint ('shots[i].moves.length=' + shots[i].moves.length);

        for (j = 0; j < shots[i].moves.length; j++) // moves index
        {
            var durationFloat =              shots[i].moves[j].duration;  // implicit type conversion from SFTime
            //  durationFloat = new SFFloat (shots[i].moves[j].duration); // explicit type conversion from SFTime
            //  tracePrint ('durationFloat=' + durationFloat);
            key[k+1]               = key[k] + (durationFloat / totalDuration);
            keyValuePosition[k+1]  = shots[i].moves[j].goalPosition;
            if (!animated)
            {
                 keyValueOrientation[k+1] = shots[i].moves[j].goalOrientation;
            }
            else
            {
                // using constructor SFRotation (SFVec3f fromVector, SFVec3f toVector)
                // see X3D ECMAScript binding Table 7.18 — SFRotation instance creation functions

                // test if difference vector is zero, if so maintain previous rotation
                var shotVector = ViewpointNode.position.subtract(shots[i].moves[j].goalAimPoint).normalize();
                if (shotVector.length() >= 0)
                {
                    // default view direction is along -Z axis
                    shots[i].moves[j].goalOrientation = new SFRotation (new SFVec3f (0, 0, 1), shotVector);
                    keyValueOrientation[k+1] = shots[i].moves[j].goalOrientation;
                }
                else // note (k > 0)
                {
                    keyValueOrientation[k+1] = keyValueOrientation[k];  // no change
                }

                tracePrint ('shots[' + i + '].moves[' + j + '].goalAimPoint=' + shots[i].moves[j].goalAimPoint.toString());
                tracePrint ('        ViewpointNode.position=' + ViewpointNode.position.toString());
                tracePrint ('          shotVector     delta=' + ViewpointNode.position.subtract(shots[i].moves[j].goalAimPoint).toString());
                tracePrint ('          shotVector normalize=' + ViewpointNode.position.subtract(shots[i].moves[j].goalAimPoint).normalize().toString());
                tracePrint ('               goalOrientation=' + shots[i].moves[j].goalOrientation.toString());
                tracePrint ('      keyValueOrientation[k+1]=' + keyValueOrientation[k+1].toString());
            }
            k++; // update index to match latest key, keyValuePosition, keyValueOrientation

            // check animated parameter:  set true if any of moves are tracking moves
            if (!animated)  animated = shots[i].moves[j].tracking; // once true, remains true
         // tracePrint ('shots[' + i + '].moves[' + j + '].tracking=' + shots[i].moves[j].tracking + ', animated=' + animated);

            // intermediate trace
            tracePrint ('                key=' + key);
            tracePrint ('   keyValuePosition=' + keyValuePosition);
            tracePrint ('keyValueOrientation=' + keyValueOrientation);
            tracePrint ('- ' + shots[i].moves[j].description);
        }
    }
    tracePrint ('                key=' + key);
    tracePrint ('   keyValuePosition=' + keyValuePosition);
    tracePrint ('keyValueOrientation=' + keyValueOrientation);
    if (key.length != keyValuePosition.length)
    {
      alwaysPrint ('warning: internal error during array construction, ' +
                  'key.length=' + key.length + ' must equal ' +
                  'keyValuePosition.length=' + keyValuePosition.length);
    }
    if (key.length != keyValueOrientation.length)
    {
      alwaysPrint ('warning: internal error during array construction, ' +
                  'key.length=' + key.length + ' must equal ' +
                  'keyValueOrientation.length=' + keyValueOrientation.length);
    }
    if (key.length != (shotCount + movesCount))
    {
      alwaysPrint ('warning: internal error during array construction, ' +
                  'key.length=' + key.length + ' must equal ' +
                  '(shotCount + movesCount)=' + (shotCount + movesCount));
    }
    tracePrint ('           animated=' + animated);
    // set node values
    CameraPI.key      = key;
    CameraOI.key      = key;
    CameraPI.keyValue = keyValuePosition;
    CameraOI.keyValue = keyValueOrientation;

    if (!animated) // output results
    {
        tracePrint ('<PositionInterpolator    DEF=\'CameraPositionInterpolator\'    key=\'' + stripBrackets(CameraPI.key) + '\' keyValue=\'' + stripBrackets(CameraPI.keyValue) + '\'/>');
        tracePrint ('<OrientationInterpolator DEF=\'CameraOrientationInterpolator\' key=\'' + stripBrackets(CameraOI.key) + '\' keyValue=\'' + stripBrackets(CameraOI.keyValue) + '\'/>');
    }
    tracePrint ('checkShots() complete');
}

function stripBrackets (fieldArray)
{
    // some browsers add brackets to array output strings, this function strips them
    outputString = '';
    for (i = 0; i < fieldArray.length; i++)
    {
       outputString += fieldArray[i].toString();
       if (i < fieldArray.length - 1) outputString += ' ';
    }
    return outputString;
}

function set_fraction (eventValue, timestamp) // input event received for inputOnly field
{
   // traceEnabled = false;  // for testing purposes

   // if Camera is being animated, immediately recompute interpolator settings
   if (animated) checkShots (true);

   // trace progress on console with reduced output frequency
   if (frameCount == 0)
   {
      alwaysPrint ('Animation loop commencing, timestamp=' + timestamp);
      startTime      = timestamp;
      priorTraceTime = timestamp;
      alwaysPrint ('shotClock=' + (timestamp - startTime) + ' seconds, frameCount=' + frameCount + ', fraction=' + eventValue + ', position=' + ViewpointNode.position.toString() + ', orientation=' + ViewpointNode.orientation.toString());

      if (animated) // output results
      {
        // TODO how to report or speed up response?  alwaysPrint ('  aimPoint=' + aimPoint.toString());
        tracePrint ('  <PositionInterpolator    DEF=\'CameraPositionInterpolator\'    key=\'' + stripBrackets(CameraPI.key) + '\' keyValue=\'' + stripBrackets(CameraPI.keyValue) + '\'/>');
        tracePrint ('  <OrientationInterpolator DEF=\'CameraOrientationInterpolator\' key=\'' + stripBrackets(CameraOI.key) + '\' keyValue=\'' + stripBrackets(CameraOI.keyValue) + '\'/>');
      }
   }
   else if ((timestamp - priorTraceTime) >= 1.0) // 1 second trace interval
   {
      alwaysPrint ('shotClock=' + (timestamp - startTime) + ' seconds, frameCount=' + frameCount + ', fraction=' + eventValue + ', position=' + ViewpointNode.position.toString() + ', orientation=' + ViewpointNode.orientation.toString());
      priorTraceTime = timestamp;

      if (animated) // output results
      {
        // TODO how to report or speed up response?  alwaysPrint ('  aimPoint=' + aimPoint.toString());
        tracePrint ('  <PositionInterpolator    DEF=\'CameraPositionInterpolator\'    key=\'' + stripBrackets(CameraPI.key) + '\' keyValue=\'' + stripBrackets(CameraPI.keyValue) + '\'/>');
        alwaysPrint ('  <OrientationInterpolator DEF=\'CameraOrientationInterpolator\' key=\'' + stripBrackets(CameraOI.key) + '\' keyValue=\'' + stripBrackets(CameraOI.keyValue) + '\'/>');
      }
   }
   if (eventValue == 0)
   {
      // note that zero value is not necessarily sent first by TimeSensor, so otherwise ignored
      frameCount++;
   }
   else if (eventValue == 1)
   {
      alwaysPrint ('shotClock=' + (timestamp - startTime) + ', frameCount=' + frameCount + ', fraction=' + eventValue + ', position=' + ViewpointNode.position.toString() + ', orientation=' + ViewpointNode.orientation.toString());
      if (animated) // output results
      {
        // TODO how to report or speed up response?  alwaysPrint ('  aimPoint=' + aimPoint.toString());
      }
      alwaysPrint ('Animation loop complete.');
      // do not unbind the Viewpoint and NavigationInfo nodes, let that be controlled externally
   }
   else
   {
      frameCount++;
   }
}

function set_bind (eventValue) // input event received for inputOnly field
{
   // need to ensure CameraShot nodes are properly initialized
   if (initialized == false)
   {
      checkShots (true);
      initialized = true;
   }
   if (eventValue)
   {
       tracePrint ('Camera has been bound');
   }
   else
   {
       tracePrint ('Camera has been unbound');
   }
}

function set_description (eventValue) // input event received for inputOutput field
{
    description = eventValue;
}

function set_position (eventValue) // input event received for inputOutput field
{
    position = eventValue;
}

function set_orientation (eventValue) // input event received for inputOutput field
{
    orientation = eventValue;
}

function set_fieldOfView (eventValue) // input event received for inputOutput field
{
    fieldOfView = eventValue;
}

function set_nearClipPlane (eventValue) // input event received for inputOutput field
{
    nearClipPlane = eventValue;
}

function set_farClipPlane (eventValue) // input event received for inputOutput field
{
    farClipPlane = eventValue;
}

function set_shots (eventValue) // input event received for inputOutput field
{
    shots = eventValue;
}

function set_filterColor (eventValue) // input event received for inputOutput field
{
    filterColor = eventValue;
}

function set_filterTransparency (eventValue) // input event received for inputOutput field
{
    filterTransparency = eventValue;
}

function set_upVector (eventValue) // input event received for inputOutput field
{
    upVector = eventValue;
}

function set_fStop (eventValue) // input event received for inputOutput field
{
    fStop = eventValue;
}

function set_focusDistance (eventValue) // input event received for inputOutput field
{
    focusDistance = eventValue;
}

function set_offlineRender (eventValue) // input event received for inputOutput field
{
    offlineRender = eventValue;
}

function set_key (eventValue) // input event received for inputOutput field
{
    key = eventValue;
}

function set_keyValuePosition (eventValue) // input event received for inputOutput field
{
    keyValuePosition = eventValue;
}

function set_keyValueOrientation (eventValue) // input event received for inputOutput field
{
    keyValueOrientation = eventValue;
}

function set_animated (eventValue) // input event received for inputOutput field
{
    animated = eventValue;
}

function tracePrint (outputValue)
{
	if (traceEnabled) alwaysPrint (outputValue);
}
function alwaysPrint (outputValue)
{
    // try to ensure outputValue is converted to string despite Browser.println idiosyncracies
    var outputString = outputValue.toString(); // utility function according to spec
    if (outputString == null) outputString = outputValue; // direct cast

    if  (description.length > 0)
         Browser.println ('[Camera: ' + description + '] ' + outputString);
    else
         Browser.println ('[Camera] ' + outputString);
}

        

          
ecmascript:
function initialize () // CameraShotScript
{
//  tracePrint ('initialize start...');

    // compute shotDuration by summing durations from contained CameraMovement nodes
    shotDuration = 0;
    for (i = 0; i < moves.length; i++)
    {
        shotDuration = shotDuration + moves[i].duration;
    }
    alwaysPrint ('number of contained CameraMove nodes=' + moves.length + ', shotDuration=' + shotDuration + ' seconds');

//  tracePrint ('... initialize() complete');
}

function set_description (eventValue) // input event received for inputOutput field
{
    description = eventValue;
}

function set_enabled (eventValue) // input event received for inputOutput field
{
    enabled = eventValue;
}

function set_moves (eventValue) // input event received for inputOutput field
{
    moves = eventValue;
}

function set_initialPosition (eventValue) // input event received for inputOutput field
{
    initialPosition = eventValue;
}

function set_initialOrientation (eventValue) // input event received for inputOutput field
{
    initialOrientation = eventValue;
}

function set_initialAimPoint (eventValue) // input event received for inputOutput field
{
    initialAimPoint = eventValue;
}

function set_initialFieldOfView (eventValue) // input event received for inputOutput field
{
    initialFieldOfView = eventValue;
}

function set_initialFStop (eventValue) // input event received for inputOutput field
{
    initialFStop = eventValue;
}

function set_initialFocusDistance (eventValue) // input event received for inputOutput field
{
    initialFocusDistance = eventValue;
}

function set_key (eventValue) // input event received for inputOutput field
{
    key = eventValue;
}

function set_keyValuePosition (eventValue) // input event received for inputOutput field
{
    keyValuePosition = eventValue;
}

function set_keyValueOrientation (eventValue) // input event received for inputOutput field
{
    keyValueOrientation = eventValue;
}

// TODO consider method set_active for constructed Camera node BooleanSequencer to send isActive

function tracePrint (outputValue)
{
	if (traceEnabled) alwaysPrint (outputValue);
}
function alwaysPrint (outputValue)
{
	// try to ensure outputValue is converted to string despite browser idiosyncracies
    var outputString = outputValue.toString(); // utility function according to spec
    if (outputString == null) outputString = outputValue; // direct cast

    if  (description.length > 0)
         Browser.println ('[CameraShot: ' + description + '] ' + outputString);
    else
         Browser.println ('[CameraShot] ' + outputString);
}

        

          
ecmascript:
function initialize () // CameraMovementScript
{
//  tracePrint ('initialize start...');
    alwaysPrint ('initialize goalPosition=' + goalPosition.toString() + ', goalOrientation=' + goalOrientation.toString() +
                           ', goalAimPoint=' + goalAimPoint.toString() // + ', tracking=' + tracking.toString()
                           );
    if (duration < 0)
    {
       alwaysPrint ('error: negative duration=' + duration + ', reset to 0 and ignored');
       duration = 0;
    }
    else if (duration == 0)
    {
       alwaysPrint ('warning: duration=0, nothing to do!');
    }
    tracePrint ('... initialize complete');
}

function set_goalAimPoint (eventValue) // input event received for inputOutput field
{
    goalAimPoint_changed = eventValue;
    tracePrint ('goalAimPoint=' + goalAimPoint.toString());

    // updated goalOrientation tracking is handled by Camera recomputing the OrientationInterpolator
}

function set_description (eventValue) // input event received for inputOutput field
{
    description = eventValue;
}

function set_enabled (eventValue) // input event received for inputOutput field
{
    enabled = eventValue;
}

function set_duration (eventValue) // input event received for inputOutput field
{
    duration = eventValue;
}

function set_goalPosition (eventValue) // input event received for inputOutput field
{
    goalPosition = eventValue;
}

function set_goalOrientation (eventValue) // input event received for inputOutput field
{
    goalOrientation = eventValue;
}

function set_tracking (eventValue) // input event received for inputOutput field
{
    tracking = eventValue;
}

function set_goalFieldOfView (eventValue) // input event received for inputOutput field
{
    goalFieldOfView = eventValue;
}

function set_goalFStop (eventValue) // input event received for inputOutput field
{
    goalFStop = eventValue;
}

function set_goalFocusDistance (eventValue) // input event received for inputOutput field
{
    goalFocusDistance = eventValue;
}

// TODO consider method set_active for constructed Camera node BooleanSequencer to send isActive

function tracePrint (outputValue)
{
	if (traceEnabled) alwaysPrint (outputValue);
}

function alwaysPrint (outputValue)
{
	// try to ensure outputValue is converted to string despite browser idiosyncracies
    var outputString = outputValue.toString(); // utility function according to spec
    if (outputString == null) outputString = outputValue; // direct cast

    if  (description.length > 0)
         Browser.println ('[CameraMovement: ' + description + '] ' + outputString);
    else
         Browser.println ('[CameraMovement] ' + outputString);
}

        

          
ecmascript:
function initialize () // OfflineRenderScript
{
//  tracePrint ('initialize start...');

    tracePrint ('... initialize complete');
}

function set_description (eventValue) // input event received for inputOutput field
{
    description = eventValue;
}

function set_enabled (eventValue) // input event received for inputOutput field
{
    enabled = eventValue;
}

function set_frameRate (eventValue) // input event received for inputOutput field
{
    frameRate = eventValue;
}

function set_frameSize (eventValue) // input event received for inputOutput field
{
    frameSize = eventValue;
}

function set_pixelAspectRatio (eventValue) // input event received for inputOutput field
{
    pixelAspectRatio = eventValue;
}

function set_startTime (eventValue) // input event received for inputOnly field
{
   // do something with input eventValue;
}

function tracePrint (outputValue)
{
	if (traceEnabled) alwaysPrint (outputValue);
}

function alwaysPrint (outputValue)
{
	// try to ensure outputValue is converted to string despite browser idiosyncracies
    var outputString = outputValue.toString(); // utility function according to spec
    if (outputString == null) outputString = outputValue; // direct cast

    if  (description.length > 0)
         Browser.println ('[OfflineRender: ' + description + '] ' + outputString);
    else
         Browser.println ('[OfflineRender] ' + outputString);
}