How to get game object properties in a gui script

Leviathan · July 26, 2016, 2:48pm

Hey guys, I’m having trouble with some GUI stuff currently I have a text node that has a text value of 0 but I want it to display the property health of my player object but for the life of me, I cant figure of out why I just get the error
bad argument #4 to ‘get’ (GOScriptInstance expected, got userdata)


function update(self, dt)
    local health = go.get("main:/Player/controller#script", "health")
    gui.set_text(playerHealth, 1000)
end

Lukas_Palmer · July 26, 2016, 3:00pm

“argument #4” is an implicit argument that’s used in game object scripts to work properly with go.get(). From a GUI script, you won’t be able to directly use go.get(); I suggest using message passing or global variables to share information between your player and the GUI script.

sicher · July 26, 2016, 3:00pm

Preferably message passing…

Leviathan · July 26, 2016, 3:01pm

yea Im working on using messages

Leviathan · July 26, 2016, 3:09pm

how does one send a message to a gui script?

sicher · July 26, 2016, 3:21pm

Send the message to the gui component.

See http://www.defold.com/manuals/message-passing/ for some examples.

Leviathan · July 26, 2016, 5:27pm

Thank you il try that when I get home

britzl · July 27, 2016, 9:03pm

Every component (be it a sprite, script, gui_script or anything else) you add to a game object will get it’s own unique URL that can be used to pass messages to the component using msg.post(). The manual on message passing should describe this in detail. but if there is anything that is unclear then please ask here and we’ll try to explain.