I have the following function in a scene that extends citrus.core.starling.StarlingState - it loads the PlayerRun animation and displays it on the screen. For the most part, this code works: I see the sprite on the screen (it's running in place).
protected final override function DrawScene ():void
{
Player = new CitrusSprite ( "Player" );
Player.velocity = [60, 0]; // Doesn't seem to have an effect
Player.x = 40;
Player.y = 40;
var oClip:MovieClip = new MovieClip ( Resources.getTextures (
"PlayerRun" ), 24 );
Player.view = oClip;
add ( Player );
}
I'm not sure how I'm supposed to use the velocity property - there's no documentation for it and no matter what numbers I use in the code above, it doesn't change the display: the animation plays but the sprite is stationary (it doesn't move horizontally as I would expect it).
Am I using the velocity property incorrectly? Does Citrus support sprite velocity or is this something I'd have to implement myself?
As it turns out, CitrusSprite has a property, updateCallEnabled that's false by default and disables calls to update(). Once I set this property to true, the code started working as expected.
I haven't used Citrus yet, but looking at the source code it should work the way you've gone about it assuming that the update method is called on your player:
You can review the way the velocity property works at these locations:
The getter and setter for velocity.
The update loop for CitrusSprite.
MathVector, the type used for velocity internally.
I suspect you need to add the player to something that will queue it for updating.
Related
I am having a major problem in my new browser app.
Okay so I made game where different cubes (squares) spawn at the top of the screen and I use the Tween class to make them go down the screen and then disappear.
However I want to detect a collision when a cube hits the player (that is also a flying cube).
I tried everything, truly everything but it does not seem to work. The problematic thing is that when I remove the "Tween" function it does detect collision with the hitTestObject method but when I add the "Tween" line collision won't be detected anymore.
It looks like this:
function enemiesTimer (e:TimerEvent):void
{
newEnemy = new Enemy1();
layer2.addChild(newEnemy);
newEnemy.x = Math.random() * 700;
newEnemy.y = 10;
if (enemiesThere == 0)
{
enemiesThere = true;
player.addEventListener(Event.ENTER_FRAME, collisionDetection)
}
var Tween1:Tween = new Tween(newEnemy, "y", null, newEnemy.y, newEnemy.y+distance, movingTime, true);
}
And the collision detection part:
private function collisionDetection (e:Event):void
{
if (player.hitTestObject(newEnemy))
{
trace("aaa");
}
}
I am desperate for some information/help on the topic, it's been bugging me for days.
Thanks for your time, I would be very happy if someone could help me out^^
First, make sure the "newEnemy" instance and the "player" instance are within the same container. If they are not, their coordinate systems might not match up and could be the source of your problem.
Otherwise, you need to keep a reference to each enemy instance you create. It looks like you are only checking against a single "newEnemy" variable which is being overwritten every time you create a new enemy. This might be why you can successfully detect collision between the player and the most recent "enemy" instance.
So... you need a list of the enemies, you can use an Array for that.
private var enemyList:Array = [];
Every time you create an enemy, push it to the Array.
enemyList.push(newEnemy);
In your "collisionDetection" function, you need to loop through all of the enemies and check if the player is touching any of them.
for(var i:int = 0; i < enemyList.length; i++)
{
var enemy = enemies[i];
if (player.hitTestObject(enemy))
{
trace("Collision Detected!");
enemy.parent.removeChild(enemy); // remove the enemy from the stage
enemies.splice(i, 1); // remove the enemy from the list
}
}
I'd suggest that you move to TweenMax, it just might solve your problem, and in my experience it's much better in every possible way.
Scroll down the following page to see a few variations of this library, I myself use TweenNano, they're completely free of charge:
https://greensock.com/gsap-as
I think some plugins cost money, but I doubt you'll ever need them.
I am making a game in which multiple character fire towards each other and on hitting the fire they will act with different animations like: blast, bounce, blur and so on. For now the thing where i am stuck is that while fire is traveling how will we check that its intersecting with other objects of not? I mean run animations only on targeted characters.
You could save your objects that want to check in a vector and schedule an update in your scene that checks if they collide.
This is an answer for Box2D.
Create a body def for each of the objects you are firing. Using some of the code below. Make sure you change shapes to fit what you need. Pixel to meter ratio I set to 32.0 in my code.
b2BodyDef bulletDef;
bulletDef.type = b2_dynamicBody;
bulletDef.position.Set(startPositionX / Pixel_To_Meter_Ratio,
startPositionY / Pixel_To_Meter_Ratio);
auto b2PolygonShape bulletShape;
bulletShape.SetAsBox(bulletWidth / Pixel_To_Meter_Ratio,
bulletHeight / Pixel_To_Meter_Ratio);
auto bulletBody = physicsWorld->CreateBody(bulletDef)
Apply velocity to the body def in the position that you want the bullet to go.
bulletBody->ApplyLinearImpulse(b2Vec(bulletDirectionX,
bulletDirectionY),
physicsBody->GetPosition(),
true);
Add a contact listener to the physics world that inherits from b2ContactListener
// Node that manages the physics world from box2d
class PhysicsNode : public b2ContactListener
{
void BeginContact(b2Contact* contact);
}
// register this listener with the box2d world
auto physicsWorld = new b2World(b2Vec2(0, -9.8f));
physicsWorld ->SetContactListener(this);
Implement the BeginContact function and handle the collision in there.
void PhysicsNode::BeginContact(b2Contact* contact)
{
// Get the physics bodies
auto objectOne = contact->GetFixtureA()->GetBody();
auto objectTwo = contact->GetFixtureB()->GetBody();
// Cast to the type you set as your user data
auto collidableOne = static_cast<Collidable*>(objectOne->GetUserData());
auto collidableTwo = static_cast<Collidable*>(objectTwo->GetUserData());
// Handle your collisions. Apply blur/explode/whatever you need
collidableOne->handleCollision(collidableTwo->isReactableCollision());
collidableTwo->handleCollision(collidableOne->isReactableCollision());
}
I hope this helps. This is what I use to achieve the functionality you are looking for.
I start creating my flash game using Flashpunk, for collisions i didn't want to use hitboxes because i had images (PNG) with transparent parts in them so i decided to use Collision Detection Kit, i have a problem when creating the collision list, it takes a display object as a parameter and doesn't accept flash punk spritemaps, i tried to cast the spritemap to a flash display object but it's not working, is there a way to use the CDK with flashpunk ?
override public function begin():void
{
_player = new Player(100, 100);// Entity
initCollision(_player.sprPlayer);// The Entity Spritemap
}
private function initCollision(player:Spritemap):void {
collisionChecker = new CollisionList(player); // Problem here
}
Well, you could create an empty BitmapData with the same width & height of your Spritemap and then "render" it to that BitmapData, like so:
var bmd:BitmapData = new BitmapData(64, 64, true, 0);
var sprite:Spritemap = _player.sprPlayer;
sprite.render(bmd, new Point(0,0), new Point(0,0));
collisionChecker = new CollisionList(bmd);
That should draw the spritemap's current frame to a BitmapData which you could then use for the CollisionList. The code above is an example that only demonstrates how to do this. For your actual code, it would be better to avoid constantly initializing new variables during your collision detection.
Okay, I have the following code in my Bullet.as file:
public var impact:MovieClip;
public function Bullet():void
{
addEventListener(Event.ADDED_TO_STAGE, whenAdded);
}
function whenAdded(e:Event)
{
if(this is zArrow){
power = -1;
speed = 15;
impact = arrowImpact;
trace(impact);
}
if(this is Dice){
power = -Math.round(Math.random()*5 + 1);
speed = 10;
impact = diceImpact
}
}
See, I am trying to set the value of "public var impact:MovieClip" as the movie clip "arrowImpact" or "diceImpact". What I want is whenever a bullet collides with an enemy, it leaves an impact image behind and I'm trying to change what impact is shown depending on what bullet is colliding.
I am able to change all of the other variables like power and speed using this setup, but I can't declare which impact movie clip the "impact" movie clip variable is.
From the way I understand your question now, you want to pull these specific movie clips from the Library. If I am not mistaken. To do this, you need to pair each of the movie clips in the library to an AS class that extends MovieClip.
Make sure you check "Export for Actionscript" and create the class you want for each. Then, in your code for the Bullet, you can create a new instance of them. So have it say:
impact = new ArrowImpact)();
or DiceImpact depending on your classes.
Hope this is along the lines of what you wanted.
In order to use these, I would recommend creating a getImpact method along the lines of:
public function getImpactMC():MovieClip
{
return impact;
}
Then all you need to do in your main Document is addChild the proper impact from this method. However, be aware that you need to adjust the x and y values of the impactMC before adding it as a child on the stage to make sure that it displays in the proper position.
Glad this helps!
I am trying to build a portfolio application similar to the used by Whitevoid. I am using Flex 4 and Papervision3D 2. I have everything working except for one issue. When I try to load an external SWF as a material on one of the planes, I can see any native Flex or Flash components in their correct positions, but the papervision objects are not being rendered properly. It looks like the viewport is not being set in the nested swf. I have posted my code for loading the swf below.
private function loadMovie(path:String=""):void
{
loader = new Loader();
request = new URLRequest(path);
loader.contentLoaderInfo.addEventListener(Event.INIT, addMaterial);
loader.load(request);
}
private function addMaterial(e:Event):void
{
movie = new MovieClip();
movie.addChild(e.target.content);
var width:Number = 0;
var height:Number = 0;
width = loader.contentLoaderInfo.width;
height = loader.contentLoaderInfo.height;
//calculate the aspect ratio of the swf
var matAR:Number = width/height;
if (matAR > aspectRatio)
{
plane.scaleY = aspectRatio / matAR;
}
else if (matAR < aspectRatio)
{
plane.scaleX = matAR / aspectRatio;
}
var mat:MovieMaterial = new MovieMaterial(movie, false, true, false, new Rectangle(0, 0, width, height));
mat.interactive = true;
mat.smooth = true;
plane.material = mat;
}
Below I have posted two pictures. The first is a shot of the application running by itself. The second is the application as a MovieMaterial on a Plane. You can see how the button created as a spark object in the mxml stays in the correct position, but papervision sphere (which is rotating) is in the wrong location. Is there something I am missing here?
Man. I haven't seen that site in a while. Still one of the cooler PV projects...
What do you mean by:
I cannot properly see the scene rendered in Papervision
You say you can see the components in their appropriate positions, as in: you have a plane with what looks like the intended file loading up? But I'm guessing that you can't interact with it.
As far as I know, and I've spent a reasonable amount of time trying to make something similar work, the MovieMaterial (which I assume you're using) draws a Bitmap of whatever contents exist in your MovieClip, and if you set it to animated=true, then it will render out a series of bitmaps - equating animation. What it's not doing, is displaying an actual MovieClip (or SWF) on the plane. So you may see your components, but this is how:
MovieMaterial.as line 137
// ______________________________________________________________________ CREATE BITMAP
/**
*
* #param asset
* #return
*/
protected function createBitmapFromSprite( asset:DisplayObject ):BitmapData
{
// Set the new movie reference
movie = asset;
// initialize the bitmap since it's new
initBitmap( movie );
// Draw
drawBitmap();
// Call super.createBitmap to centralize the bitmap specific code.
// Here only MovieClip specific code, all bitmap code (maxUVs, AUTO_MIP_MAP, correctBitmap) in BitmapMaterial.
bitmap = super.createBitmap( bitmap );
return bitmap;
}
Note in the WhiteVoid you never actually interact with a movie until it "lands" = he's very likely swapping in a Movie on top of the bitmap textured plane.
The part that you are interacting with is probably another plane that holds the "button" that simply becomes visible on mouseover.
I think PV1.0 had access to real swfs as a material but this changed in 2.0. Sadly. Hopefully Molehill will.
cheers