I am making a game in Libgdx, in which I want to show and hide a texture for specific interval of time and repeat this process. can I use Timer class for this.
Please give me some example also.
I'm not sure what your trying to do here. You could just have a flag in your rendering loop
Texture texture;
long lastFlip = 0;
long flipTime = 1000;
boolean display = false;
//..In your rendering loop
if(lastFlip+flipTime > System.currentTimeMillis()){
display = !display;
lastFlip = System.currentTimeMillis();
}
if(display){
spriteBatch.draw(texture,0,0);
}
If you want to use the inbuilt actions system in scene2d have a at the following tutorial. Tutorial. The blog is very good and gives you a good idea of how to use a lot of scene2d features. It might be a little bit out of data beacuse of the changes to scene2d but it will give you the idea you need.
I am sure you got the solution now but instead of using System specific time you should use the Gdx graphics delta time which you already have in the render method. Then compare it with the amount of time for which you want to show the textures.
You should definitely use libGDX wrapper function to read time to avoid eventual incompatibility on different platforms. But code it self can be really simple:
if (TimeUtils.millis()%(SHOW_TIME+HIDE_TIME) < SHOW_TIME){
// render it
}
Where SHOW_TIME is number of milliseconds you want your texture displayed and HIDE_TIME is number of milliseconds you want it hidden. No need for extra variables and making it more complicated than this.
Related
I'm completely new to actionscript (as3, not as2) and am having some problems with some simple functions and variables. Everything is in one .fla using the actions panel.
How do I get functions to execute? Nothing of my shape changes and there is no output.
*I am aware the first change won't be noticeable, I'll add a timer later on.
Here is the code*:
var starBlackWidth = 500;
var starBlackScaleX = 0.5;
function starStretch(){
starBlack.length = starBlackWidth;
trace("Stretched the star.");
}
function starReadjust() {
starBlack.scaleX = starBlackScaleX;
trace("Attempted at readjusting without using the width directly.");
}
As some of the commenters pointed out, yes you need to call the functions you created by adding these two lines of code.
starStretch();
starReadjust();
To expand upon what they said, yes these may be fundamental concepts of programming but if you're new to object oriented programming in as3 and even oop in general this link is extremely helpful at getting you going in as3, its 3 parts and it covers it pretty well!
http://www.untoldentertainment.com/blog/2009/08/25/tutorial-understanding-classes-in-as3-part-1/
For a long time I've been searching for a solution to this problem, so I decided to post a tread instead when the search didn't clarify anything.
I have a textfield that is supposed to move across the screen. I've solved this by adding a speed to its x-value dynamically through an "enter-frame function". However, the movement is very "laggy" and consists of sudden "jumps" in the movement. I've tried a couple of possible solutions to this, all of them without luck.
embedding fonts
changing the textfield's antiAliasType
using BitmapData like this:
bmd = new BitmapData (myTextField.width, myTextField.height, true, 0);
bmd.draw (myTextField);
bm = new Bitmap (bmd);
bm.x = myTextField.x;
bm.y = myTextField.y;
bm.cacheAsBitmap = true;
bm.smoothing = true;
this.addChild(bm);`
And then moving the "bm" instance
None of these methods worked.
EDIT: By request, I am adding the relevant code for the actual movement of the text.
stage.addEventListener(Event.ENTER_FRAME, time);
private function time(evt:Event):void
{
bm.x-= textSpeed;
}
The variable textSpeed is defined as a public static var. Its value is 2.
*EDIT2: I've prepared a clean fla-file with nothing but moving text. The same lag occurs for me also here. The code is in the actions panel. Download link
the way Flash IDE works, is that setting the framerate is actually the 'maximum' framerate. That is, it doesn't force the animation to run at that rate - it can vary depending on the machine and available resources.
As far as I know, there's no way to force Flash to run at a certain framerate - the best way to make animations 'smooth' is to use Tween classes like TweenLite.
If you NEED to animate by incrementing position values, then I suggest making it time based instead, for example:
var fps = 24;
var moveTimer:Timer = new Timer(1000/fps);
moveTimer.addEventListener(TimerEvent.TIMER, onMoveTimer);
moveTimer.start();
function onMoveTimer(e:TimerEvent){
bm.x -= 1;
}
Again, this doesn't solve the smoothness of the animation, but it will be much more reliable across different machines than using enter frame.
Try increasing the framerate. Because you naturally try to read text as it animates, you can generally notice the gaps between frames at 24fps. Try setting stage.frameRate to 30, 48, or 60 (60 being the max) and see if that solves your issues. I've had similar issues with animating text in the past and increasing frame rate has fixed them.
I would also recommend only increasing it as needed. You are much more likely to drop frames with a higher frame rate (makes logical sense; each frame has less time to calculate as frame rate increases), so you might want to do something like:
stage.frameRate = 48;
// run animations here
stage.frameRate = 24; // in an Event.COMPLETE handler
That will make sure your animations are smooth while giving the rest of your application the best shot of running well on lesser devices. If you are running a lot of animations, you might consider keeping it elevated permanently.
You should also look into using the Greensock animation library (TweenLite/TweenMax) instead of Flash's built-in tweening. Greensock has a vastly superior API, both in terms of features and performances, especially on mobile.
Im trying to destroy a gameObject (in my case a 2d ball) when my player comes into contact with it with the built-in OnCollisionEnter function. My script is only attached to the player. Both the player, and the ball(battery) have 2d box colliders, and rigidbodies. Perhaps the fact that they are 2d colliders instead of regular has something to do with the problem? Ah! yes I almost forgot to mention the problem; it's not working. Its niether destroying, or printing "hit".... and oh yes, i DID name the ball "battery". thAnks so much I would very much appreciate some help!
UnityScript Code:
function OnCollisionEnter(batt : Collision)
{
if(batt.collider.name == "battery")
{
Destroy(batt.gameObject);
Debug.Log("Hit");
}
}
if you are using unity's 2d toolset, instead of OnCollisionEnter you use OnCollisionEnter2D, and inside the variables, instead of batt: Collision, you need to change it to batt: Collision2D, hope this helps :), also, you said your both objects have 2d box colliders and rigidbodies, make sure it's a 2d rigidbody and not a 3d rigidbody (default)
Well, its hard to debug collisions in Unity, and even harder without knowing your whole project. But a few things:
1) Make sure you have rigidbodies attached to your gameObjects that you want to receive events
2) For your code I'm not too sure ( since I mostly do C# ) but basically:
OnCollisionEnter( Collision batt ){
if ( batt.gameObject.name == "battery" ){
//Do what you want it to do
}
}
I think essentially you might not be pulling in the right name. If that doesn't work, try to place a debugger breakpoint on the OnCollisionEnter to see if it is being called.
I've drawn a tentacle on the screen with ik bones that I want to bend against the player when he's close enough. I have gotten this to work, but the animation is happening too fast, and even though I throw all kinds of:
myMover.limitByTime = true;
myMover.timeLimit = 4000;
myMover.limitByIteration = true;
myMover.iterationLimit = 1;
myMover.limitByDistance = true
myMover.distanceLimit=1000;
code I think might slow it down, it doesn't slow down at all. How do I fix this? :S Im not sure if this is good form but I also have a somewhat related question: How do i get flash to recognize the armature if I don't have it set to runtime as opposed to authortime? Because if I set it to authortime then the following code returns null:
tentacle = IKManager.getArmatureByName("tentacle");
trace(tentacle);
Now the problem with runtime is that some clever users might be able to manipulate my tentaclemonster with the mouse :|
As I understand the IKMover limits, they're intended to control maximum processing time, not the animation. You can adjust the speed of each bone by selecting it in the IDE and looking under the "Location" properties.
I'd suggest leaving the speed at 100% and removing the limits though, then animating the target point directly (and calling moveTo on each frame). That way you have more precise control over the speed.
My head is spinning from two days of trying to find an answer to this seemingly simple question.
I'm developing a Flex/AIR application built entirely in ActionScript -- there's no MXML beyond what was originally auto-created.
I need to dynamically generate some kind of editable text-field with high control over formatting. The TLF text fields all seem great, except that I can't get any of them to render on the screen. Due to the nature of the application, they have to be inside a MovieClip, but since I've read that everything must be a descendant of UIComponent, I use UIMovieClip, which is AddChild'ed to the stage.
I'm about to go crazy here, the whole application is in jeopardy over this. I CAN NOT use MXML, and all the 10,000 examples on the internet are MXML. I need to generate these dynamically. I need to generate upwards of 50 fields under one movieclip based on database data. There's no way to hardcode that with MXML. Please don't suggest to change this. The GUI is very specific about this, and it's the right GUI.
In two days of searching, I can't find a single example in ActionScript, only MXML. I've tried everything that smelled like an example.
Is there some obvious general pointer I'm missing? I'll be happy to post code, but it doesn't make sense because I've been through so many examples.
Does anyone have the simplest possible code for creating any kind of TLF text editing field in ActionScript only (zero MXML), which is then added to a MovieClip or UIMovieClip, which is added to the stage of a desktop AIR application?
I will greatly cherish any help here.
Best,
Per
This should get you started:
//create your TextFlow component
var textFlow:TextFlow = new TextFlow();
var p:ParagraphElement = new ParagraphElement();
var span:SpanElement = new SpanElement();
span.text = "hello world";
p.addChild(span);
textFlow.addChild(p);
//create a Sprite that will contain the text
var textBlock:Sprite = new Sprite();
//create a controller for compositing
var controller:ContainerController = new ContainerController(textBlock);
//set the size of the composition
controller.setCompositionSize(100, 200);
//make the controller control the TextFlow object
textFlow.flowComposer.addController(controller);
//update the composition
textFlow.flowComposer.updateAllControllers();
//add to the stage
addChild(textBlock);
About the size: it is important you use setCompositionSize() instead of the Sprite's width and height properties.
Using addController() you could spread the text over several Sprites. Each Sprite would have its own ContainerController, but all would share the same FlowComposer which would calculate the composition.
warning : using TLF like this can be pretty complicated. Above code is the bare minimum to get things running. I do not know your requirements, but you'll probably hit a few other roadblocks along the way. You have to ask yourself this question: are you really willing to drop all the built-in features of TextArea? It might cost you months of development to get things right, depending on the requirements. You still may want to reconsider your architecture...