canSee method

bool canSee(
  1. PositionComponent component, {
  2. World? componentWorld,
})

Returns true if this camera is able to see the component. Will always return false if

  • world is null or
  • world is not mounted or
  • component is not mounted or
  • componentWorld is non-null and does not match with world

If componentWorld is null, this method does not take into consideration the world to which the given component belongs (if any). This means, in such cases, any component overlapping the visibleWorldRect will be reported as visible, even if it is not part of the world this camera is currently looking at. This can be changed by passing the the component's world as componentWorld.

Implementation

bool canSee(PositionComponent component, {World? componentWorld}) {
  if (!(world?.isMounted ?? false) ||
      !component.isMounted ||
      (componentWorld != null && componentWorld != world)) {
    return false;
  }

  return visibleWorldRect.overlaps(component.toAbsoluteRect());
}