Program: 11008
Project: 11008
Buggy source:
/** 
 * Populate the update vertex buffers with the coordinates of the eye location at each frame in the animation. <p/> Vertex buffer has size <code>3*animation.getlastFrame()</code>, with <code>[x,y,z]</code> stored at <code>[3*frame, 3*frame+1, 3*frame+2]</code> <p/> Colour buffer has size <code>3*animation.getLastFrame()</code> with colours ramping through the HSV colour space based on the rate of change of the camera eye position. Colours <code>[r,g,b]</code> are stored at <code>[3*frame, 3*frame+1, 3*frame+2]</code>.
 */
private void populatePathBuffers(){
  pathReferenceCenter=null;
  int firstFrame=animation.getFrameOfFirstKeyFrame();
  int lastFrame=animation.getFrameOfLastKeyFrame();
  double[] deltas=new double[lastFrame - firstFrame + 1];
  double minDelta=Double.MAX_VALUE;
  double maxDelta=0d;
  pathVertexBackBuffer.rewind();
  Position[] pathPositions=getPathPositions(firstFrame,lastFrame);
  Position previousPathPosition=null;
  for (int i=0; i < pathPositions.length; i++) {
    Position currentPathPosition=pathPositions[i];
    Vec4 eyeVector=animation.getView().getGlobe().computePointFromPosition(currentPathPosition);
    if (pathReferenceCenter == null) {
      pathReferenceCenter=eyeVector;
    }
    pathVertexBackBuffer.put(eyeVector.x - pathReferenceCenter.x);
    pathVertexBackBuffer.put(eyeVector.y - pathReferenceCenter.y);
    pathVertexBackBuffer.put(eyeVector.z - pathReferenceCenter.z);
    if (previousPathPosition != null) {
      double positionDelta=calculateDelta(currentPathPosition,previousPathPosition);
      deltas[i]=positionDelta;
      maxDelta=Math.max(maxDelta,positionDelta);
      minDelta=Math.min(minDelta,positionDelta);
    }
    previousPathPosition=currentPathPosition;
  }
  if (deltas.length > 1) {
    deltas[0]=deltas[1];
  }
  populatePathColourBufferFromDeltas(deltas,minDelta,maxDelta);
  pathVertexBackBuffer.rewind();
}

Fixed version (ground truth):
/** 
 * Populate the update vertex buffers with the coordinates of the eye location at each frame in the animation. <p/> Vertex buffer has size <code>3*animation.getlastFrame()</code>, with <code>[x,y,z]</code> stored at <code>[3*frame, 3*frame+1, 3*frame+2]</code> <p/> Colour buffer has size <code>3*animation.getLastFrame()</code> with colours ramping through the HSV colour space based on the rate of change of the camera eye position. Colours <code>[r,g,b]</code> are stored at <code>[3*frame, 3*frame+1, 3*frame+2]</code>.
 */
private void populatePathBuffers(){
  pathReferenceCenterBack=null;
  int firstFrame=animation.getFrameOfFirstKeyFrame();
  int lastFrame=animation.getFrameOfLastKeyFrame();
  double[] deltas=new double[lastFrame - firstFrame + 1];
  double minDelta=Double.MAX_VALUE;
  double maxDelta=0d;
  pathVertexBackBuffer.rewind();
  Position[] pathPositions=getPathPositions(firstFrame,lastFrame);
  Position previousPathPosition=null;
  for (int i=0; i < pathPositions.length; i++) {
    Position currentPathPosition=pathPositions[i];
    Vec4 eyeVector=animation.getView().getGlobe().computePointFromPosition(currentPathPosition);
    if (pathReferenceCenterBack == null) {
      pathReferenceCenterBack=eyeVector;
    }
    pathVertexBackBuffer.put(eyeVector.x - pathReferenceCenterBack.x);
    pathVertexBackBuffer.put(eyeVector.y - pathReferenceCenterBack.y);
    pathVertexBackBuffer.put(eyeVector.z - pathReferenceCenterBack.z);
    if (previousPathPosition != null) {
      double positionDelta=calculateDelta(currentPathPosition,previousPathPosition);
      deltas[i]=positionDelta;
      maxDelta=Math.max(maxDelta,positionDelta);
      minDelta=Math.min(minDelta,positionDelta);
    }
    previousPathPosition=currentPathPosition;
  }
  if (deltas.length > 1) {
    deltas[0]=deltas[1];
  }
  populatePathColourBufferFromDeltas(deltas,minDelta,maxDelta);
  pathVertexBackBuffer.rewind();
}