ViewHelper's raycaster have no intersects in HandleClick

Questions
,
1

When I use ViewHelper.
it’s not work well with handleClick function, and I find I can fix the problem:

  • The original code:
this.handleClick = function ( event ) {
...
			mouse.x = ( ( event.clientX - offsetX ) / ( rect.width - offsetX ) ) * 2 - 1;
			mouse.y = - ( ( event.clientY - offsetY ) / ( rect.bottom - offsetY ) ) * 2 + 1;
...
}
  • After Fix:
this.handleClick = function ( event ) {
...
			mouse.x = ( ( event.clientX - offsetX ) / ( rect.right - offsetX ) ) * 2 - 1;
			mouse.y = - ( ( event.clientY - offsetY ) / ( rect.bottom - offsetY ) ) * 2 + 1;
...
}

just change rect.width to rect.right

Is this correct? or how to use ViewHelper?