{"id":330,"date":"2011-07-20T18:29:15","date_gmt":"2011-07-20T17:29:15","guid":{"rendered":"http:\/\/www.aymericlamboley.fr\/blog\/?p=330"},"modified":"2014-11-01T15:06:16","modified_gmt":"2014-11-01T14:06:16","slug":"create-a-ladder-for-the-citrus-engine","status":"publish","type":"post","link":"http:\/\/www.aymericlamboley.fr\/blog\/create-a-ladder-for-the-citrus-engine\/","title":{"rendered":"Create a ladder for the Citrus Engine"},"content":{"rendered":"

Hi, today a quick post about how to create a ladder for the Citrus Engine.
\nIt is a preview version, Michael Kerr<\/a> requested me for his flash game scripting class !<\/p>\n

I’m working with Eric to add it into the original package !!<\/p>\n

So here is the result : the ladder in action<\/strong><\/a><\/p>\n

<\/p>\n

A ladder is a simple sensor object.
\nHere are the specifications :
\n– a ladder is a Sensor, on contact it will give the capacity for the hero to climb\/down. It removes it after contact.
\n– it will remove hero’s gravity when it will be on the ladder and restore it after contact.
\n– the hero can’t duck on a ladder, but it can always jump.
\n– the ladder mode should not be “enabled” until the player presses “up” or “down” depending on where they are vertically. That way they can jump past it.
\n– as soon as the player “connects to” the ladder, they should be translated smoother to the center of the ladder so they are climbing up\/down the center of it.
\n– when coming from the top to go down, there will be a platform, and the ladder over. I disable contact with this platform if the hero uses the ladder.
\n– there are 3 ladder animations (ladderIdle, ladderClimbUp, and ladderClimbDown)<\/p>\n

So I update the Sensor like that :<\/p>\n

package com.citrusengine.objects.platformer\r\n{\r\n\timport Box2DAS.Dynamics.ContactEvent;\r\n\timport Box2DAS.Dynamics.b2Body;\r\n\timport flash.display.MovieClip;\r\n\t\r\n\timport com.citrusengine.objects.PhysicsObject;\r\n\t\r\n\timport org.osflash.signals.Signal;\r\n\t\r\n\t\/**\r\n\t * Sensors simply listen for when an object begins and ends contact with them. They disaptch a signal\r\n\t * when contact is made or ended, and this signal can be used to perform custom game logic such as\r\n\t * triggering a scripted event, ending a level, popping up a dialog box, and virtually anything else.\r\n\t * \r\n\t * Remember that signals dispatch events when ANY Box2D object collides with them, so you will want\r\n\t * your collision handler to ignore collisions with objects that it is not interested in, or extend\r\n\t * the sensor and use maskBits to ignore collisions altogether.  \r\n\t * \r\n\t * Events\r\n\t * onBeginContact - Dispatches on first contact with the sensor.\r\n\t * onEndContact - Dispatches when the object leaves the sensor.\r\n\t *\/\t\r\n\tpublic class Sensor extends PhysicsObject\r\n\t{\r\n\t\t\/**\r\n\t\t * Dispatches on first contact with the sensor.\r\n\t\t *\/\r\n\t\tpublic var onBeginContact:Signal;\r\n\t\t\/**\r\n\t\t * Dispatches when the object leaves the sensor.\r\n\t\t *\/\r\n\t\tpublic var onEndContact:Signal;\r\n\t\t\r\n\t\tpublic var isLadder:Boolean = false;\r\n\t\t\r\n\t\tpublic static function Make(name:String, x:Number, y:Number, width:Number, height:Number, view:* = null):Sensor\r\n\t\t{\r\n\t\t\tif (view == null) view = MovieClip;\r\n\t\t\treturn new Sensor(name, { x: x, y: y, width: width, height: height, view: view } );\r\n\t\t}\r\n\t\t\r\n\t\tpublic function Sensor(name:String, params:Object=null)\r\n\t\t{\r\n\t\t\tsuper(name, params);\r\n\t\t\tonBeginContact = new Signal(ContactEvent);\r\n\t\t\tonEndContact = new Signal(ContactEvent);\r\n\t\t}\r\n\t\t\r\n\t\toverride public function destroy():void\r\n\t\t{\r\n\t\t\tonBeginContact.removeAll();\r\n\t\t\tonEndContact.removeAll();\r\n\t\t\t_fixture.removeEventListener(ContactEvent.BEGIN_CONTACT, handleBeginContact);\r\n\t\t\t_fixture.removeEventListener(ContactEvent.END_CONTACT, handleEndContact);\r\n\t\t\tsuper.destroy();\r\n\t\t}\r\n\t\t\r\n\t\toverride protected function defineBody():void\r\n\t\t{\r\n\t\t\tsuper.defineBody();\r\n\t\t\t_bodyDef.type = b2Body.b2_staticBody;\r\n\t\t}\r\n\t\t\r\n\t\toverride protected function defineFixture():void\r\n\t\t{\r\n\t\t\tsuper.defineFixture();\r\n\t\t\t_fixtureDef.isSensor = true;\r\n\t\t}\r\n\t\t\r\n\t\toverride protected function createFixture():void\r\n\t\t{\r\n\t\t\tsuper.createFixture();\r\n\t\t\t_fixture.m_reportBeginContact = true;\r\n\t\t\t_fixture.m_reportEndContact = true;\r\n\t\t\t_fixture.addEventListener(ContactEvent.BEGIN_CONTACT, handleBeginContact);\r\n\t\t\t_fixture.addEventListener(ContactEvent.END_CONTACT, handleEndContact);\r\n\t\t}\r\n\t\t\r\n\t\tprotected function handleBeginContact(e:ContactEvent):void\r\n\t\t{\r\n\t\t\tonBeginContact.dispatch(e);\r\n\t\t}\r\n\t\t\r\n\t\tprotected function handleEndContact(e:ContactEvent):void\r\n\t\t{\r\n\t\t\tonEndContact.dispatch(e);\r\n\t\t}\r\n\t}\r\n}<\/pre>\n
Adding a proprety to it : public var isLadder:Boolean = false;<\/em><\/p>\n
I update the hero class too:<\/p>\n
package com.citrusengine.objects.platformer {\r\n\r\n\timport Box2DAS.Common.V2;\r\n\timport Box2DAS.Dynamics.ContactEvent;\r\n\timport Box2DAS.Dynamics.b2Body;\r\n\timport Box2DAS.Dynamics.b2Fixture;\r\n\r\n\timport com.citrusengine.math.MathVector;\r\n\timport com.citrusengine.objects.PhysicsObject;\r\n\timport com.citrusengine.physics.CollisionCategories;\r\n\r\n\timport org.osflash.signals.Signal;\r\n\r\n\timport flash.display.MovieClip;\r\n\timport flash.ui.Keyboard;\r\n\timport flash.utils.clearTimeout;\r\n\timport flash.utils.getDefinitionByName;\r\n\timport flash.utils.setTimeout;\r\n\t\r\n\t\/**\r\n\t * This is a common, simple, yet solid implementation of a side-scrolling Hero. \r\n\t * The hero can run, jump, get hurt, and kill enemies. It dispatches signals\r\n\t * when significant events happen. The game state's logic should listen for those signals\r\n\t * to perform game state updates (such as increment coin collections).\r\n\t * \r\n\t * Don't store data on the hero object that you will need between two or more levels (such\r\n\t * as current coin count). The hero should be re-created each time a state is created or reset.\r\n\t *\/\t\r\n\tpublic class Hero extends PhysicsObject\r\n\t{\r\n\t\t\/\/properties\r\n\t\t\r\n\t\t\/\/ properties for ladder\r\n\t\tpublic var originalGravity:Number = 1.6;\r\n\t\tpublic var canClimb:Boolean = false;\r\n\t\tpublic var climbVelocity:Number = 5;\r\n\t\tpublic var ladder:Sensor;\r\n\t\tprotected var _onLadder:Boolean = false;\r\n\t\tprotected var _climbing:Boolean = false;\r\n\t\tprotected var _climbAnimation:String = \"ladderIdle\";\r\n\t\t\/\/end properties for ladder\r\n\t\t\r\n\t\t\/**\r\n\t\t * This is the rate at which the hero speeds up when you move him left and right. \r\n\t\t *\/\t\t\r\n\t\tpublic var acceleration:Number = 1;\r\n\t\t\r\n\t\t\/**\r\n\t\t * This is the fastest speed that the hero can move left or right. \r\n\t\t *\/\t\t\r\n\t\tpublic var maxVelocity:Number = 8;\r\n\t\t\r\n\t\t\/**\r\n\t\t * This is the initial velocity that the hero will move at when he jumps.\r\n\t\t *\/\t\t\r\n\t\tpublic var jumpHeight:Number = 14;\r\n\t\t\r\n\t\t\/**\r\n\t\t * This is the amount of \"float\" that the hero has when the player holds the jump button while jumping. \r\n\t\t *\/\t\t\r\n\t\tpublic var jumpAcceleration:Number = 0.9;\r\n\t\t\r\n\t\t\/**\r\n\t\t * This is the y velocity that the hero must be travelling in order to kill a Baddy.\r\n\t\t *\/\t\t\r\n\t\tpublic var killVelocity:Number = 3;\r\n\t\t\r\n\t\t\/**\r\n\t\t * The y velocity that the hero will spring when he kills an enemy. \r\n\t\t *\/\t\t\r\n\t\tpublic var enemySpringHeight:Number = 10;\r\n\t\t\r\n\t\t\/**\r\n\t\t * The y velocity that the hero will spring when he kills an enemy while pressing the jump button. \r\n\t\t *\/\t\t\r\n\t\tpublic var enemySpringJumpHeight:Number = 12;\r\n\t\t\r\n\t\t\/**\r\n\t\t * How long the hero is in hurt mode for. \r\n\t\t *\/\t\t\r\n\t\tpublic var hurtDuration:Number = 1000;\r\n\t\t\r\n\t\t\/**\r\n\t\t * The amount of kick-back that the hero jumps when he gets hurt. \r\n\t\t *\/\t\t\r\n\t\tpublic var hurtVelocityX:Number = 6;\r\n\t\t\r\n\t\t\/**\r\n\t\t * The amount of kick-back that the hero jumps when he gets hurt. \r\n\t\t *\/\t\t\r\n\t\tpublic var hurtVelocityY:Number = 10;\r\n\t\t\r\n\t\t\/\/events\r\n\t\t\/**\r\n\t\t * Dispatched whenever the hero jumps. \r\n\t\t *\/\t\t\r\n\t\tpublic var onJump:Signal;\r\n\t\t\r\n\t\t\/**\r\n\t\t * Dispatched whenever the hero gives damage to an enemy. \r\n\t\t *\/\t\t\r\n\t\tpublic var onGiveDamage:Signal;\r\n\t\t\r\n\t\t\/**\r\n\t\t * Dispatched whenever the hero takes damage from an enemy. \r\n\t\t *\/\t\t\r\n\t\tpublic var onTakeDamage:Signal;\r\n\t\t\r\n\t\t\/**\r\n\t\t * Dispatched whenever the hero's animation changes. \r\n\t\t *\/\t\t\r\n\t\tpublic var onAnimationChange:Signal;\r\n\t\t\r\n\t\t\/**\r\n\t\t * Determines whether or not the hero's ducking ability is enabled.\r\n\t\t *\/\r\n\t\tpublic var canDuck:Boolean = true;\r\n\t\t\r\n\t\tprotected var _groundContacts:Array = [];\/\/Used to determine if he's on ground or not.\r\n\t\tprotected var _enemyClass:Class = Baddy;\r\n\t\tprotected var _onGround:Boolean = false;\r\n\t\tprotected var _springOffEnemy:Number = -1;\r\n\t\tprotected var _hurtTimeoutID:Number;\r\n\t\tprotected var _hurt:Boolean = false;\r\n\t\tprotected var _friction:Number = 0.75;\r\n\t\tprotected var _playerMovingHero:Boolean = false;\r\n\t\tprotected var _controlsEnabled:Boolean = true;\r\n\t\tprotected var _ducking:Boolean = false;\r\n\t\t\r\n\t\tpublic static function Make(name:String, x:Number, y:Number, width:Number, height:Number, view:* = null):Hero\r\n\t\t{\r\n\t\t\tif (view == null) view = MovieClip;\r\n\t\t\treturn new Hero(name, { x: x, y: y, width: width, height: height, view: view } );\r\n\t\t}\r\n\t\t\r\n\t\t\/**\r\n\t\t * Creates a new hero object.\r\n\t\t *\/\t\t\r\n\t\tpublic function Hero(name:String, params:Object = null)\r\n\t\t{\r\n\t\t\tsuper(name, params);\r\n\t\t\t\r\n\t\t\toriginalGravity = gravity;\r\n\t\t\t\r\n\t\t\tonJump = new Signal();\r\n\t\t\tonGiveDamage = new Signal();\r\n\t\t\tonTakeDamage = new Signal();\r\n\t\t\tonAnimationChange = new Signal();\r\n\t\t}\r\n\t\t\r\n\t\toverride public function destroy():void\r\n\t\t{\r\n\t\t\t_fixture.removeEventListener(ContactEvent.PRE_SOLVE, handlePreSolve);\r\n\t\t\t_fixture.removeEventListener(ContactEvent.BEGIN_CONTACT, handleBeginContact);\r\n\t\t\t_fixture.removeEventListener(ContactEvent.END_CONTACT, handleEndContact);\r\n\t\t\tclearTimeout(_hurtTimeoutID);\r\n\t\t\tonJump.removeAll();\r\n\t\t\tonGiveDamage.removeAll();\r\n\t\t\tonTakeDamage.removeAll();\r\n\t\t\tonAnimationChange.removeAll();\r\n\t\t\tsuper.destroy();\r\n\t\t}\r\n\t\t\r\n\t\t\/**\r\n\t\t * Whether or not the player can move and jump with the hero. \r\n\t\t *\/\t\r\n\t\tpublic function get controlsEnabled():Boolean\r\n\t\t{\r\n\t\t\treturn _controlsEnabled;\r\n\t\t}\r\n\t\t\r\n\t\tpublic function set controlsEnabled(value:Boolean):void\r\n\t\t{\r\n\t\t\t_controlsEnabled = value;\r\n\t\t\t\r\n\t\t\tif (!_controlsEnabled)\r\n\t\t\t\t_fixture.SetFriction(_friction);\r\n\t\t}\r\n\t\t\r\n\t\t\/**\r\n\t\t * Returns true if the hero is on the ground and can jump. \r\n\t\t *\/\t\t\r\n\t\tpublic function get onGround():Boolean\r\n\t\t{\r\n\t\t\treturn _onGround;\r\n\t\t}\r\n\t\t\r\n\t\t\/**\r\n\t\t * The Hero uses the enemyClass parameter to know who he can kill (and who can kill him).\r\n\t\t * Use this setter to to pass in which base class the hero's enemy should be, in String form\r\n\t\t * or Object notation.\r\n\t\t * For example, if you want to set the \"Baddy\" class as your hero's enemy, pass\r\n\t\t * \"com.citrusengine.objects.platformer.Baddy\", or Baddy (with no quotes). Only String\r\n\t\t * form will work when creating objects via a level editor.\r\n\t\t *\/\t\t\r\n\t\tpublic function set enemyClass(value:*):void\r\n\t\t{\r\n\t\t\tif (value is String)\r\n\t\t\t\t_enemyClass = getDefinitionByName(value as String) as Class;\r\n\t\t\telse if (value is Class)\r\n\t\t\t\t_enemyClass = value;\r\n\t\t}\r\n\t\t\r\n\t\t\/**\r\n\t\t * This is the amount of friction that the hero will have. Its value is multiplied against the\r\n\t\t * friction value of other physics objects.\r\n\t\t *\/\t\r\n\t\tpublic function get friction():Number\r\n\t\t{\r\n\t\t\treturn _friction;\r\n\t\t}\r\n\t\t\r\n\t\tpublic function set friction(value:Number):void\r\n\t\t{\r\n\t\t\t_friction = value;\r\n\t\t\t\r\n\t\t\tif (_fixture)\r\n\t\t\t{\r\n\t\t\t\t_fixture.SetFriction(_friction);\r\n\t\t\t}\r\n\t\t}\r\n\t\t\r\n\t\toverride public function update(timeDelta:Number):void\r\n\t\t{\r\n\t\t\tsuper.update(timeDelta);\r\n\t\t\t\r\n\t\t\tvar velocity:V2 = _body.GetLinearVelocity();\r\n\t\t\t\r\n\t\t\tif (controlsEnabled)\r\n\t\t\t{\r\n\t\t\t\tvar moveKeyPressed:Boolean = false;\r\n\t\t\t\t\r\n\t\t\t\t_ducking = (_ce.input.isDown(Keyboard.DOWN) && _onGround && canDuck);\r\n\t\t\t\t\r\n\t\t\t\tif (_ce.input.isDown(Keyboard.RIGHT) && !_ducking)\r\n\t\t\t\t{\r\n\t\t\t\t\tif (canClimb) {\r\n\t\t\t\t\t\tgravity = originalGravity;\r\n\t\t\t\t\t\t_climbing = false;\r\n\t\t\t\t\t}\r\n\t\t\t\t\tvelocity.x += (acceleration);\r\n\t\t\t\t\tmoveKeyPressed = true;\r\n\t\t\t\t}\r\n\t\t\t\t\r\n\t\t\t\tif (_ce.input.isDown(Keyboard.LEFT) && !_ducking)\r\n\t\t\t\t{\r\n\t\t\t\t\tif (canClimb) {\r\n\t\t\t\t\t\tgravity = originalGravity;\r\n\t\t\t\t\t\t_climbing = false;\r\n\t\t\t\t\t}\r\n\t\t\t\t\tvelocity.x -= (acceleration);\r\n\t\t\t\t\tmoveKeyPressed = true;\r\n\t\t\t\t}\r\n\t\t\t\t\r\n\t\t\t\t_onLadder = ((_ce.input.isDown(Keyboard.DOWN) || _ce.input.isDown(Keyboard.UP)) && canClimb);\r\n\t\t\t\t\r\n\t\t\t\tif (_onLadder) {\r\n\t\t\t\t\tif (x < ladder.x) \r\n\t\t\t\t\t\tx++;\r\n\t\t\t\t\tif (x > ladder.x)\r\n\t\t\t\t\t\tx--;\r\n\t\t\t\t}\r\n\r\n\t\t\t\tif (_ce.input.isDown(Keyboard.UP) && canClimb) {\r\n\t\t\t\t\t_onLadder = _climbing = true;\r\n\t\t\t\t\t_climbAnimation = \"ladderClimbUp\";\r\n\t\t\t\t\tvelocity = new V2(0, 0);\r\n\t\t\t\t\tvelocity.y -= climbVelocity;\r\n\t\t\t\t\tgravity = 0;\r\n\t\t\t\t\tmoveKeyPressed = true;\r\n\t\t\t\t}\r\n\t\t\t\t\r\n\t\t\t\tif (_ce.input.isDown(Keyboard.DOWN) && canClimb) {\r\n\t\t\t\t\t_onLadder = _climbing = true;\r\n\t\t\t\t\t_climbAnimation = \"ladderClimbDown\";\r\n\t\t\t\t\tvelocity = new V2(0, 0);\r\n\t\t\t\t\tvelocity.y += climbVelocity;\r\n\t\t\t\t\tgravity = 0;\r\n\t\t\t\t\tmoveKeyPressed = true;\r\n\t\t\t\t}\r\n\t\t\t\t\r\n\t\t\t\t\/\/ Remove velocity if just stop climbing\r\n\t\t\t\tif ((_ce.input.justReleased(Keyboard.UP) || _ce.input.justReleased(Keyboard.DOWN)) && canClimb) {\r\n\t\t\t\t\t_climbAnimation = \"ladderIdle\";\r\n\t\t\t\t\tvelocity.y = 0;\r\n\t\t\t\t}\r\n\t\t\t\t\r\n\t\t\t\tif (canClimb && _ce.input.justPressed(Keyboard.SPACE)) {\r\n\t\t\t\t\t_climbing = false;\r\n\t\t\t\t\tgravity = originalGravity;\r\n\t\t\t\t\tvelocity.y = -jumpHeight;\r\n\t\t\t\t\tonJump.dispatch();\r\n\t\t\t\t}\r\n\t\t\t\t\r\n\t\t\t\t\/\/If player just started moving the hero this tick.\r\n\t\t\t\tif (moveKeyPressed && !_playerMovingHero)\r\n\t\t\t\t{\r\n\t\t\t\t\t_playerMovingHero = true;\r\n\t\t\t\t\t_fixture.SetFriction(0); \/\/Take away friction so he can accelerate.\r\n\t\t\t\t}\r\n\t\t\t\t\/\/Player just stopped moving the hero this tick.\r\n\t\t\t\telse if (!moveKeyPressed && _playerMovingHero)\r\n\t\t\t\t{\r\n\t\t\t\t\t_playerMovingHero = false;\r\n\t\t\t\t\t_fixture.SetFriction(_friction); \/\/Add friction so that he stops running\r\n\t\t\t\t}\r\n\t\t\t\t\r\n\t\t\t\tif (_onGround && _ce.input.justPressed(Keyboard.SPACE) && !_ducking)\r\n\t\t\t\t{\r\n\t\t\t\t\tvelocity.y = -jumpHeight;\r\n\t\t\t\t\tonJump.dispatch();\r\n\t\t\t\t}\r\n\t\t\t\t\r\n\t\t\t\tif (_ce.input.isDown(Keyboard.SPACE) && !_onGround && velocity.y < 0)\r\n\t\t\t\t{\r\n\t\t\t\t\tvelocity.y -= jumpAcceleration;\r\n\t\t\t\t}\r\n\t\t\t\t\r\n\t\t\t\tif (_springOffEnemy != -1)\r\n\t\t\t\t{\r\n\t\t\t\t\tif (_ce.input.isDown(Keyboard.SPACE))\r\n\t\t\t\t\t\tvelocity.y = -enemySpringJumpHeight;\r\n\t\t\t\t\telse\r\n\t\t\t\t\t\tvelocity.y = -enemySpringHeight;\r\n\t\t\t\t\t_springOffEnemy = -1;\r\n\t\t\t\t}\r\n\t\t\t\t\r\n\t\t\t\t\/\/Cap velocities\r\n\t\t\t\tif (velocity.x > (maxVelocity))\r\n\t\t\t\t\tvelocity.x = maxVelocity;\r\n\t\t\t\telse if (velocity.x < (-maxVelocity))\r\n\t\t\t\t\tvelocity.x = -maxVelocity;\r\n\t\t\t\t\r\n\t\t\t\t\/\/update physics with new velocity\r\n\t\t\t\t_body.SetLinearVelocity(velocity);\r\n\t\t\t}\r\n\r\n\t\t\tupdateAnimation();\r\n\t\t}\r\n\t\t\r\n\t\t\/**\r\n\t\t * Returns the absolute walking speed, taking moving platforms into account.\r\n\t\t * Isn't super performance-light, so use sparingly.\r\n\t\t *\/\r\n\t\tpublic function getWalkingSpeed():Number\r\n\t\t{\r\n\t\t\tvar groundVelocityX:Number = 0;\r\n\t\t\tfor each (var groundContact:b2Fixture in _groundContacts)\r\n\t\t\t{\r\n\t\t\t\tgroundVelocityX += groundContact.GetBody().GetLinearVelocity().x;\r\n\t\t\t}\r\n\t\t\t\r\n\t\t\treturn _body.GetLinearVelocity().x - groundVelocityX;\r\n\t\t}\r\n\t\t\r\n\t\t\/**\r\n\t\t * Hurts the hero, disables his controls for a little bit, and dispatches the onTakeDamage signal. \r\n\t\t *\/\t\t\r\n\t\tpublic function hurt():void\r\n\t\t{\r\n\t\t\t_hurt = true;\r\n\t\t\tcontrolsEnabled = false;\r\n\t\t\t_hurtTimeoutID = setTimeout(endHurtState, hurtDuration);\r\n\t\t\tonTakeDamage.dispatch();\r\n\t\t\t\r\n\t\t\t\/\/Makes sure that the hero is not frictionless while his control is disabled\r\n\t\t\tif (_playerMovingHero)\r\n\t\t\t{\r\n\t\t\t\t_playerMovingHero = false;\r\n\t\t\t\t_fixture.SetFriction(_friction);\r\n\t\t\t}\r\n\t\t}\r\n\t\t\r\n\t\toverride protected function defineBody():void\r\n\t\t{\r\n\t\t\tsuper.defineBody();\r\n\t\t\t_bodyDef.fixedRotation = true;\r\n\t\t\t_bodyDef.allowSleep = false;\r\n\t\t}\r\n\t\t\r\n\t\toverride protected function defineFixture():void\r\n\t\t{\r\n\t\t\tsuper.defineFixture();\r\n\t\t\t_fixtureDef.friction = _friction;\r\n\t\t\t_fixtureDef.restitution = 0;\r\n\t\t\t_fixtureDef.filter.categoryBits = CollisionCategories.Get(\"GoodGuys\");\r\n\t\t\t_fixtureDef.filter.maskBits = CollisionCategories.GetAll();\r\n\t\t}\r\n\t\t\r\n\t\toverride protected function createFixture():void\r\n\t\t{\r\n\t\t\tsuper.createFixture();\r\n\t\t\t_fixture.m_reportPreSolve = true;\r\n\t\t\t_fixture.m_reportBeginContact = true;\r\n\t\t\t_fixture.m_reportEndContact = true;\r\n\t\t\t_fixture.addEventListener(ContactEvent.PRE_SOLVE, handlePreSolve);\r\n\t\t\t_fixture.addEventListener(ContactEvent.BEGIN_CONTACT, handleBeginContact);\r\n\t\t\t_fixture.addEventListener(ContactEvent.END_CONTACT, handleEndContact);\r\n\t\t}\r\n\t\t\r\n\t\tprotected function handlePreSolve(e:ContactEvent):void \r\n\t\t{\r\n\t\t\tif (e.other.GetBody().GetUserData() is Platform && canClimb && (_climbing || !_onGround)) {\r\n\t\t\t\tif ((y + height \/ 2) < (ladder.y + ladder.height \/ 2)) {\r\n\t\t\t\t\te.contact.Disable();\r\n\t\t\t\t}\r\n\t\t\t}\r\n\t\t\t\r\n\t\t\tif (!_ducking)\r\n\t\t\t\treturn;\r\n\t\t\t\t\r\n\t\t\tvar other:PhysicsObject = e.other.GetBody().GetUserData() as PhysicsObject;\r\n\t\t\t\r\n\t\t\tvar heroTop:Number = y;\r\n\t\t\tvar objectBottom:Number = other.y + (other.height \/ 2);\r\n\t\t\t\r\n\t\t\tif (objectBottom < heroTop)\r\n\t\t\t\te.contact.Disable();\r\n\t\t}\r\n\t\t\r\n\t\tprotected function handleBeginContact(e:ContactEvent):void\r\n\t\t{\r\n\t\t\tvar colliderBody:b2Body = e.other.GetBody();\r\n\t\t\t\r\n\t\t\tif (_enemyClass && colliderBody.GetUserData() is _enemyClass)\r\n\t\t\t{\r\n\t\t\t\tif (_body.GetLinearVelocity().y < killVelocity && !_hurt)\r\n\t\t\t\t{\r\n\t\t\t\t\thurt();\r\n\t\t\t\t\t\r\n\t\t\t\t\t\/\/fling the hero\r\n\t\t\t\t\tvar hurtVelocity:V2 = _body.GetLinearVelocity();\r\n\t\t\t\t\thurtVelocity.y = -hurtVelocityY;\r\n\t\t\t\t\thurtVelocity.x = hurtVelocityX;\r\n\t\t\t\t\tif (colliderBody.GetPosition().x > _body.GetPosition().x)\r\n\t\t\t\t\t\thurtVelocity.x = -hurtVelocityX;\r\n\t\t\t\t\t_body.SetLinearVelocity(hurtVelocity);\r\n\t\t\t\t}\r\n\t\t\t\telse\r\n\t\t\t\t{\r\n\t\t\t\t\t_springOffEnemy = colliderBody.GetPosition().y * _box2D.scale - height;\r\n\t\t\t\t\tonGiveDamage.dispatch();\r\n\t\t\t\t}\r\n\t\t\t}\r\n\t\t\t\r\n\t\t\tif (colliderBody.GetUserData() is Sensor && colliderBody.GetUserData().isLadder) {\r\n\t\t\t\tcanClimb = true;\r\n\t\t\t\tcanDuck = false;\r\n\t\t\t\tladder = colliderBody.GetUserData();\r\n\t\t\t}\r\n\t\t\t\r\n\t\t\t\r\n\t\t\t\/\/Collision angle\r\n\t\t\tif (e.normal) \/\/The normal property doesn't come through all the time. I think doesn't come through against sensors.\r\n\t\t\t{\r\n\t\t\t\tvar collisionAngle:Number = new MathVector(e.normal.x, e.normal.y).angle * 180 \/ Math.PI;\r\n\t\t\t\tif (collisionAngle > 45 && collisionAngle < 135)\r\n\t\t\t\t{\r\n\t\t\t\t\t_groundContacts.push(e.other);\r\n\t\t\t\t\t_onGround = true;\r\n\t\t\t\t}\r\n\t\t\t}\r\n\t\t}\r\n\t\t\r\n\t\tprotected function handleEndContact(e:ContactEvent):void\r\n\t\t{\r\n\t\t\t\/\/Remove from ground contacts, if it is one.\r\n\t\t\tvar index:int = _groundContacts.indexOf(e.other);\r\n\t\t\tif (index != -1)\r\n\t\t\t{\r\n\t\t\t\t_groundContacts.splice(index, 1);\r\n\t\t\t\tif (_groundContacts.length == 0)\r\n\t\t\t\t\t_onGround = false;\r\n\t\t\t}\r\n\t\t\t\r\n\t\t\tif (e.other.GetBody().GetUserData() is Sensor && e.other.GetBody().GetUserData().isLadder) {\r\n\t\t\t\t_climbing = canClimb = false;\r\n\t\t\t\tcanDuck = true;\r\n\t\t\t\tgravity = originalGravity;\r\n\t\t\t}\r\n\t\t}\r\n\t\t\r\n\t\tprotected function endHurtState():void\r\n\t\t{\r\n\t\t\t_hurt = false;\r\n\t\t\tcontrolsEnabled = true;\r\n\t\t}\r\n\t\t\r\n\t\tprotected function updateAnimation():void\r\n\t\t{\r\n\t\t\tvar prevAnimation:String = _animation;\r\n\t\t\t\r\n\t\t\tif (_hurt)\r\n\t\t\t{\r\n\t\t\t\t_animation = \"hurt\";\r\n\t\t\t} else if (_climbing) {\r\n\t\t\t\t\r\n\t\t\t\t_animation = _climbAnimation;\r\n\t\t\t}\r\n\t\t\telse if (!_onGround)\r\n\t\t\t{\r\n\t\t\t\t_animation = \"jump\";\r\n\t\t\t}\r\n\t\t\telse if (_ducking)\r\n\t\t\t{\r\n\t\t\t\t_animation = \"duck\";\r\n\t\t\t}\r\n\t\t\telse\r\n\t\t\t{\r\n\t\t\t\tvar walkingSpeed:Number = getWalkingSpeed();\r\n\t\t\t\tif (walkingSpeed < -acceleration)\r\n\t\t\t\t{\r\n\t\t\t\t\t_inverted = true;\r\n\t\t\t\t\t_animation = \"walk\";\r\n\t\t\t\t}\r\n\t\t\t\telse if (walkingSpeed > acceleration)\r\n\t\t\t\t{\r\n\t\t\t\t\t_inverted = false;\r\n\t\t\t\t\t_animation = \"walk\";\r\n\t\t\t\t}\r\n\t\t\t\telse\r\n\t\t\t\t{\r\n\t\t\t\t\t_animation = \"idle\";\r\n\t\t\t\t}\r\n\t\t\t}\r\n\t\t\t\r\n\t\t\tif (prevAnimation != _animation)\r\n\t\t\t{\r\n\t\t\t\tonAnimationChange.dispatch();\r\n\t\t\t}\r\n\t\t}\r\n\t}\r\n}<\/pre>\n
You can find my zip<\/strong><\/a>.<\/p>\n
And now, I will upgrade on Mac OS X Lion \ud83d\ude42<\/p>\n","protected":false},"excerpt":{"rendered":"
Hi, today a quick post about how to create a ladder for the Citrus Engine. It is a preview version, Michael Kerr requested me for his flash game scripting class ! I’m working with Eric to add it into the original package !! So here is the result : the ladder in action<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0},"categories":[4,115,51,33,11,114],"tags":[15,27,50,34,26,69],"_links":{"self":[{"href":"http:\/\/www.aymericlamboley.fr\/blog\/wp-json\/wp\/v2\/posts\/330"}],"collection":[{"href":"http:\/\/www.aymericlamboley.fr\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.aymericlamboley.fr\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.aymericlamboley.fr\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.aymericlamboley.fr\/blog\/wp-json\/wp\/v2\/comments?post=330"}],"version-history":[{"count":9,"href":"http:\/\/www.aymericlamboley.fr\/blog\/wp-json\/wp\/v2\/posts\/330\/revisions"}],"predecessor-version":[{"id":1296,"href":"http:\/\/www.aymericlamboley.fr\/blog\/wp-json\/wp\/v2\/posts\/330\/revisions\/1296"}],"wp:attachment":[{"href":"http:\/\/www.aymericlamboley.fr\/blog\/wp-json\/wp\/v2\/media?parent=330"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.aymericlamboley.fr\/blog\/wp-json\/wp\/v2\/categories?post=330"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.aymericlamboley.fr\/blog\/wp-json\/wp\/v2\/tags?post=330"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}