how can i access a function in another file

Getting Started Newbie Questions
#1

hey, i have a lua file of all the functions for my game and a regular scene where all my objects are created. i want to add an event listener  to one of my objects so that i can drag it and shoot it(like angry birds). but to do that, i need to access the functions in my other lua file, how would i be able to do that. thx in advance

#2

There are a couple way to do this

  1. pass in via composer goto

example

--level1.lua local function myTestFunc () print("hello") end local options = { effect = "fade", time = 800, params = { testFunc=myTestFunc} } composer.gotoScene( "level2", options ) --level2.lua local composer = require( "composer" ) local scene = composer.newScene() -- "scene:create()" function scene:create( event ) local myTestFunc = event.params.testFunc myTestFunc() end scene:addEventListener( "create", scene ) return scene 
  1. via module

example:

--myDataStore.lua local m = {} function m.helloWorld () print("hello world") end return m -- main.lua local myDataStore = require("myDataStore") myDataStore.helloWorld()
#3

thx for replying, but what if it was like this.

--level 1.lua local functions = require("functions") circle = display.newCircle(60, 70, 20 ); circle:addEventListener("touch",functions.practice) --functions.lua local functions = {}; function functions.practice() --code to apply drag and shoot animation like in angry birds... end return functions

i tried coding it similar to this style, but it keeps saying   “attempt to index global ‘circle’ (a nil value)”

#4

I made a demo, try to compare my code to yours. At first glance it looks good, but I sure there is something that I am not see.

#5

yea your code works perfectly, but try to do something with the object, like print out the circle.x or move it around. Thats what i cant figure out.

#6

try this

--level 1.lua local functions = require("functions") circle = display.newCircle(60, 70, 20 ); circle:addEventListener("touch",functions.practice) --functions.lua local functions = {}; function functions.practice(event) local circle= event.target print(circle.x) --code to apply drag and shoot animation like in angry birds... end return functions
#7

ahh thank you soo much scott!@#$%^&*()

what i really needed was “event.target”

#8

There are a couple way to do this

  1. pass in via composer goto

example

--level1.lua local function myTestFunc () print("hello") end local options = { effect = "fade", time = 800, params = { testFunc=myTestFunc} } composer.gotoScene( "level2", options ) --level2.lua local composer = require( "composer" ) local scene = composer.newScene() -- "scene:create()" function scene:create( event ) local myTestFunc = event.params.testFunc myTestFunc() end scene:addEventListener( "create", scene ) return scene 
  1. via module

example:

--myDataStore.lua local m = {} function m.helloWorld () print("hello world") end return m -- main.lua local myDataStore = require("myDataStore") myDataStore.helloWorld()
#9

thx for replying, but what if it was like this.

--level 1.lua local functions = require("functions") circle = display.newCircle(60, 70, 20 ); circle:addEventListener("touch",functions.practice) --functions.lua local functions = {}; function functions.practice() --code to apply drag and shoot animation like in angry birds... end return functions

i tried coding it similar to this style, but it keeps saying   “attempt to index global ‘circle’ (a nil value)”

#10

I made a demo, try to compare my code to yours. At first glance it looks good, but I sure there is something that I am not see.

#11

yea your code works perfectly, but try to do something with the object, like print out the circle.x or move it around. Thats what i cant figure out.

#12

try this

--level 1.lua local functions = require("functions") circle = display.newCircle(60, 70, 20 ); circle:addEventListener("touch",functions.practice) --functions.lua local functions = {}; function functions.practice(event) local circle= event.target print(circle.x) --code to apply drag and shoot animation like in angry birds... end return functions
#13

ahh thank you soo much scott!@#$%^&*()

what i really needed was “event.target”