// the matrix to transform the heart into its shadow 
  var reflectionMatrix = new Matrix();
  
  function initOnLoad() {
   fixNetscape();
   // >> begin to work with the model etc.
  
   heartModel.assignLayers();
   heartShadowModel.assignLayers();
   
   
   //OFFSET_Y_3DHTML = 180;
   // inits reflectionMatrix 
   // reflectionMatrix.translate(0, -300, 0);
   reflectionMatrix.translate(0, -200, 0);
   reflectionMatrix.scale(0.7, 0.7, -1);
   reflectionMatrix.rotateX(Math.PI);
   
   // creates and inits matrix to initialize the model
   var initMatrix = new Matrix();
   initMatrix.scale(20, 20, 20);
   initMatrix.rotateX(Math.PI);
   
   // transforms heart (and shadow) model
   heartModel.transform(initMatrix);
  
   
   // copies the current positions of the points from the heart model
   heartShadowModel.copyPointsFrom(heartModel);
   // transforms the heart as it is its own shadow
   heartShadowModel.transform(reflectionMatrix);
    
   // >> first draw call to the model
   heartModel.draw();
   heartShadowModel.draw();
   
   // starts animation
   animate();
  }
  
  // try: used to store all heartBeat scale transformations
  // to undo them. (OpenGL technique)
  var heartBeatStackMatrix = new Matrix();