{"id":724,"date":"2008-08-30T08:05:25","date_gmt":"2008-08-30T12:05:25","guid":{"rendered":"http:\/\/www.mrsunstudios.com\/?p=724"},"modified":"2022-05-29T08:23:35","modified_gmt":"2022-05-29T12:23:35","slug":"tutorial-create-a-platform-game-in-as3-part-6","status":"publish","type":"post","link":"http:\/\/www.mrsunstudios.com\/blog\/flash\/tutorial-create-a-platform-game-in-as3-part-6\/","title":{"rendered":"Tutorial: Create a Platform Game in AS3 – Part 6"},"content":{"rendered":"
\n

Table of Contents<\/h3>\n
    \n
  1. Basic Character Programming<\/a><\/li>\n
  2. Creating The Level<\/a><\/li>\n
  3. Programming the Level<\/a><\/li>\n
  4. Adding Level Elements<\/a><\/li>\n
  5. Adding Enemies<\/a><\/li>\n
  6. Goals and Level Completion<\/a><\/li>\n
  7. Finishing Touches<\/a><\/li>\n<\/ol>\n<\/div>\n

    Step 6: Goals and Level Completion<\/h3>\n

    Ok, now that we’ve added level components and enemies, we can finally make it possible to complete a level. In our game, we’re simply going to make an object that the player has to touch in order to get to the next level. We’re also going to add some coins that will rack up points along the way. The first thing we’re going to do for this is to add a score variable:<\/p>\n

    \r\n\/\/SCORING VARIABLES\r\nvar mainScore:int = 0;\r\n<\/pre>\n
    Next, we’re going to add coins. We’ll do this just like we added the level elements. This time, we’re going to make them into a class. <\/p>\n
    First, we’re going to have to create a new class called “Coin”. We’ll do this by creating a new external ActionScript file called “Coin.as” and adding the following code to it:<\/p>\n
    \r\npackage{\r\n\timport flash.display.Sprite;\r\n\timport flash.display.MovieClip;\r\n\timport flash.display.Shape;\r\n\timport flash.display.DisplayObject;\r\n\timport flash.events.*;\r\n\t\/\/sprites are just movieclips without any frames in them\r\n\tpublic class Coin extends Sprite{\r\n\t\t\/\/_root will signify the root of the document\r\n\t\tprivate var _root:Object;\r\n\t\t\r\n\t\tpublic function Coin(){\r\n\t\t\t\/\/this code will only be run once\r\n\t\t\taddEventListener(Event.ADDED, beginClass);\r\n\t\t\t\/\/this code will constantly be run\r\n\t\t\taddEventListener(Event.ENTER_FRAME, eFrame);\r\n\t\t}\r\n\t\t\r\n\t\tprivate function beginClass(event:Event):void{\r\n\t\t\t\/\/defining the root of the document\r\n\t\t\t_root = MovieClip(root);\r\n\t\t\t\/\/making an invisible box that will help in placement\r\n\t\t\tthis.graphics.beginFill(0x000000,0);\r\n\t\t\tthis.graphics.drawRect(0,0,25,25);\r\n\t\t\t\/\/then adding a shape within it that will show the coin\r\n\t\t\tthis.graphics.beginFill(0xFFFFFF,1);\r\n\t\t\tthis.graphics.drawCircle(12.5,12.5,2.5);\r\n\t\t}\r\n\t\tprivate function eFrame(event:Event):void{\r\n\t\t\t\/\/hit testing with the coin and the main guy\r\n\t\t\t\/\/we'll use math for this!\r\n\t\t\tif(_root.mcMain.x <= this.x + _root.lvlHolder.x + 10\r\n\t\t\t   && _root.mcMain.x >= this.x + _root.lvlHolder.x - 10\r\n\t\t\t   && _root.mcMain.y <= this.y + 10\r\n\t\t\t   && _root.mcMain.y >= this.y - 10){\r\n\t\t\t\tthis.parent.removeChild(this);\r\n\t\t\t\tremoveEventListener(Event.ENTER_FRAME, eFrame);\r\n\t\t\t\t\/\/then we update the score!\r\n\t\t\t\t_root.mainScore += 100;\r\n\t\t\t}\r\n\t\t}\r\n\t}\r\n}\r\n<\/pre>\n
    The next thing to do is update the score whenever we kill an enemy. I hope you can do this on your own. I’m guessing that 500 points is a fair value for slaying an enemy. Now, we can add a goal object. I’m going to make mine turquoise, simply because it’s a cool color. To do this, we’re going to have to make another class. You know the drill:<\/p>\n
    \r\npackage{\r\n\timport flash.display.Sprite;\r\n\timport flash.display.MovieClip;\r\n\timport flash.display.Shape;\r\n\timport flash.display.DisplayObject;\r\n\timport flash.events.*;\r\n\t\/\/sprites are just movieclips without any frames in them\r\n\tpublic class Goal extends Sprite{\r\n\t\t\/\/_root will signify the root of the document\r\n\t\tprivate var _root:Object;\r\n\t\t\r\n\t\tpublic function Goal(){\r\n\t\t\t\/\/this code will only be run once\r\n\t\t\taddEventListener(Event.ADDED, beginClass);\r\n\t\t\t\/\/this code will constantly be run\r\n\t\t\taddEventListener(Event.ENTER_FRAME, eFrame);\r\n\t\t}\r\n\t\t\r\n\t\tprivate function beginClass(event:Event):void{\r\n\t\t\t\/\/defining the root of the document\r\n\t\t\t_root = MovieClip(root);\r\n\t\t\t\/\/making an invisible box that will help in placement\r\n\t\t\tthis.graphics.beginFill(0x00FFFF);\r\n\t\t\tthis.graphics.drawRect(0,0,25,25);\r\n\t\t}\r\n\t\tprivate function eFrame(event:Event):void{\r\n\t\t\tif(hitTestObject(_root.mcMain)){\r\n\t\t\t\t\/\/advancing a level\r\n\t\t\t\t_root.lvlCurrent ++;\r\n\t\t\t\t_root.resetLvl();\r\n\t\t\t}\r\n\t\t}\r\n\t}\r\n}\r\n<\/pre>\n
    We also have to add this code to the makeLvl()<\/tt> function’s for<\/tt> loop, as always:<\/p>\n
    \r\nif (lvlArray[i] == 8){\r\n\t\/\/the goal!\r\n\tnewPlacement = new Goal();\r\n\tenemyHolder.addChild(newPlacement);\r\n}\r\n<\/pre>\n
    Finally, change the lvlArray1<\/tt> and add a lvlArray2<\/tt>:<\/p>\n
    \r\nvar lvlArray1:Array = new Array(\r\n\t0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,\r\n\t0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,\r\n\t0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,\r\n\t0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,7,7,7,7,8,\r\n\t0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,1,1,1,\r\n\t0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,6,0,0,5,0,0,6,0,0,0,0,\r\n\t0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,7,7,7,7,7,0,0,0,0,0,0,0,0,0,0,1,1,1,1,1,0,0,0,0,0,\r\n\t0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,\r\n\t0,0,0,0,0,0,0,6,7,7,7,7,7,5,7,7,7,7,6,0,0,0,0,0,0,7,7,7,7,7,0,0,0,0,0,0,0,0,0,0,0,0,0,0,\r\n\t0,0,0,0,0,0,0,0,1,1,1,1,1,1,1,1,1,1,0,0,0,0,0,0,0,1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,\r\n\t0,0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,\r\n\t0,0,0,0,4,7,7,7,X,7,7,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,7,7,7,7,7,0,0,0,0,0,0,0,0,0,0,\r\n\t0,0,0,0,1,1,1,1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,\r\n\t0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,\r\n\t0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,\r\n\t0,0,1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0\r\n);\r\nvar lvlArray2:Array = new Array(\r\n\t0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,\r\n\t0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,\r\n\t0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,\r\n\t0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,7,7,7,7,7,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,\r\n\t0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,\r\n\t0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,6,0,0,5,0,0,6,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,\r\n\t0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,7,7,7,7,7,0,0,0,0,0,0,0,0,0,0,1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,7,7,7,7,7,7,7,7,7,7,0,0,0,0,0,0,0,0,0,0,0,0,0,\r\n\t0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,7,7,7,7,7,7,7,7,7,7,0,0,0,0,0,0,0,0,0,0,1,1,1,1,1,1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,\r\n\t0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,7,7,7,7,7,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,6,0,0,0,5,0,8,6,\r\n\t0,0,0,0,0,0,0,0,1,1,1,1,1,1,1,1,1,1,0,0,0,0,0,0,0,1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,1,1,1,1,1,1,1,1,7,7,7,7,7,7,7,7,7,7,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,1,1,1,1,1,\r\n\t0,0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,1,1,1,1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,\r\n\t0,0,0,0,4,7,7,7,X,7,7,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,7,7,7,7,7,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,7,7,7,7,7,7,7,7,7,7,0,0,0,0,0,0,\r\n\t0,0,0,0,1,1,1,1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,1,1,1,1,1,1,1,1,0,0,0,0,0,0,\r\n\t0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,\r\n\t0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,\r\n\t0,0,1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0\r\n);\r\n<\/pre>\n
    Well, that’s it for goals and level completion. Next time, we’ll fix some bugs and add some finishing touches!<\/p>\n
    The Final Product<\/h4>\n
    <\/embed><\/object><\/p>\n
    Source Files (zipped)<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"
    Table of Contents Basic Character Programming Creating The Level Programming the Level Adding Level Elements Adding Enemies Goals and Level Completion Finishing Touches Step 6: Goals and Level Completion Ok, now that we’ve added level components and enemies, we can finally make it possible to complete a level. In our game, we’re simply going to […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[160,5,8,4,6],"tags":[25,160,8,162,19,18,161,22,11],"_links":{"self":[{"href":"http:\/\/www.mrsunstudios.com\/blog\/wp-json\/wp\/v2\/posts\/724"}],"collection":[{"href":"http:\/\/www.mrsunstudios.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.mrsunstudios.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.mrsunstudios.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.mrsunstudios.com\/blog\/wp-json\/wp\/v2\/comments?post=724"}],"version-history":[{"count":2,"href":"http:\/\/www.mrsunstudios.com\/blog\/wp-json\/wp\/v2\/posts\/724\/revisions"}],"predecessor-version":[{"id":741,"href":"http:\/\/www.mrsunstudios.com\/blog\/wp-json\/wp\/v2\/posts\/724\/revisions\/741"}],"wp:attachment":[{"href":"http:\/\/www.mrsunstudios.com\/blog\/wp-json\/wp\/v2\/media?parent=724"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.mrsunstudios.com\/blog\/wp-json\/wp\/v2\/categories?post=724"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.mrsunstudios.com\/blog\/wp-json\/wp\/v2\/tags?post=724"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}