Lua object programming example

Revision as of 19:28, 6 January 2013

This example shows how to create a basic object using lua metatables :

MyObject = {}
MyObject.__index = MyObject

function MyObject.create(ref, pos, speed) -- object creation

	local newObj = {} -- our new object
	setmetatable(newObj, MyObject) -- set metatable
  
	newObj.object = getClone(ref) -- get a clone from the ref Maratis object
	newObj.speed = speed -- a local value
	setPosition(newObj.object, pos)

	return newObj
end

function MyObject:update() -- update function

	rotate(self.object, {0, 0, 1}, self.speed) -- rotate the object around the Z axis using the speed value

end

It can then be used like this :

Ref = getObject("Ref") -- object to clone

MyObj = MyObject.create(Ref, {0, 0, 0}, 1)

-- scene update
function onSceneUpdate()

	MyObj:update()

end