SetParent() to remove parent

[Rick]

So after the main game loop in lua I try to unparent the camera with

fw.main.camera:SetParent(0, 1)

 

But I get an error: Value at index (2) is not an object. I thought passing 0 as the first parameter was how you removed a parent? I also tried 0 as the second parameter but the same error. Any ideas what I'm missing?

[Rick]

Anyone have any ideas on how I can unparent an object?

[macklebee]

i assume just like with everything in lua when you want to remove it, you would need to set the parent to nil

[Rick]

fw.main.camera:SetParent(nil, 1)

 

didn't work

[macklebee]

havent tried it for the camera but it works when models are parented to each other and you press a button to unparent them with nil... without seeing the whole code, can only guess what the problem would be...

[Rick]

This is the Thingoid. Basically what it does is allow rotating around target 0. I place an object in the middle of my map and place this Thingoid in the map also. Make the link on index 0, position this Thingoid where I want the camera to be and run it. It then allows me to rotate the camera around the object. When I escape game mode, I then can't move the camera at all in editor mode.

 

 

require("scripts/class")
require("scripts/hooks")

--- create the class
local class=CreateClass(...)

function class:InitDialog(grid)
self.super:InitDialog(grid)
end


function class:CreateObject(model)
local object=self.super:CreateObject(model)

object.model = model
object.oneTime = false
object.leftMouseDown = false
object.mouseX = 0
object.mouseY = 0
object.camRotationX = 0
object.camRotationY = 0
Notify("Unparent camera")
fw.main.camera:SetParent(nil, 1)		-- unparent the camera. when we leave game mode this gets called and should free the camera from being parented

function object:Free(model)
	self.super:Free()
end

function object:SetKey(key,value)
	if key == "" then
	else
		return self.super:SetKey(key,value)
	end
	return 1
end

function object:GetKey(key,value)
	if key=="" then
	else
		return self.super:GetKey(key,value)
	end
	return value
end

function object:Initialize()
end

function object:ReceiveMessage(message,extra)
	if message == "" then
	else
		self.super:ReceiveMessage(message,extra)
	end
end

function object:Update()
	if GetGlobalString("mode") == "GAME_MODE" then
		if object.oneTime == false then
			-- position the camera to the editor object
			fw.main.camera:SetPosition(object.model:GetPosition(1), 1)

			-- make the target the parent to the camera
			fw.main.camera:SetParent(object.model:GetTarget(0), 1)

			object.oneTime = true
		end

		if MouseHit(1) == 1 then
			object.mouseX = MouseX()
			object.mouseY = MouseY()
			MoveMouse(200, 200)		-- 200 doesn't mean anything. It's just picked at random. It doesn't matter what it is since we are always finding the difference from where the mouse started
			HideMouse()
		end

		if MouseDown(1) == 1 then
			local mx
			local my
			mx = MouseX() - 200
			my = MouseY() - 200
			MoveMouse(200, 200)

			object.camRotationY = object.camRotationY + mx / 4.0	-- this is left and right
			--object.camRotationX = object.camRotationX - my / 4.0	-- this is up and down

			object.leftMouseDown = true
			object.model:GetTarget(0):SetRotation(Vec3(0, -object.camRotationY, 0), 1)
		elseif MouseDown(1) ~= 1 and object.leftMouseDown == true then
			MoveMouse(object.mouseX, object.mouseY)
			ShowMouse()
			object.leftMouseDown = false
		end

		--fw.main.camera:SetPosition(object.model:GetPosition(1), 1)
		object.model:SetPosition(fw.main.camera:GetPosition())

		fw.main.camera:Point(object.model:GetTarget(0), 3, 1, 0)
	end
end
end

[Niosop]

Save the original parent in a variable and set it back before it exits? Maybe it's parented to scene or something.

[Rick]

This results in the notify telling me the camera parent is nil

local p = fw.main.camera.parent
if p == nil then
Notify("camera parent is nil")
end

 

It's very strange. After I exit game mode when I right click the mouse acts like normal. It is hidden and when I unpress the right mouse it moves to the center of the screen just like normal camera in edit mode. I can't move with the keys and the camera doesn't rotate though.

[Rick]

I think I'll just hack around it with a pivot and just parent that to the object and set the cameras matrix to the pivots when in game mode.