The setup consists of two game objects.
TRIGGER. A box Shape is added to the components.
DYNAMIC. A sphere Shape matching the sprite image is added to the components.
function init(self) local pos = go.get_position() -- <1> go.animate(".", "position.x", go.PLAYBACK_LOOP_PINGPONG, pos.x + 600, go.EASING_INOUTSINE, 6) end function on_message(self, message_id, message, sender) if message_id == hash("trigger_response") then -- <2> if message.enter then -- <3> msg.post("#sprite", "disable") -- <4> else msg.post("#sprite", "enable") -- <5> end end end --[[ 1. Get the current position, then animate the position's x component looping in a ping-pong manner against an offset of 600. 2. The physics engine has detected that this game object contains collision object components that have collided with a trigger. 3. The `message` data table contains a field `enter` that is set to `true` when the trigger event signals that the trigger shape was entered. On exiting the trigger, this field is `false`. 4. Disable the sprite when the trigger is entered 5. Enable the sprite again on exit. --]]
If you want to play with these examples, you can get the project on Github.
Do you want to see more examples? Why not write a few yourself and submit a pull request? We love contributions.