I am creating one application in that i want to give background effect like there are number of starts and something like we are in universe and some starts are getting lighted for few seconds then some other starts etc.
I got one open gles animation of Explosion , but I want that kind of effect using quartz core or Cocos2d so that I can implement other things easily.
if any one do have any idea or any sample for the sample please suggest me.
Thanks in advance
If I understand you question correctly (that is not quite clear) you can use some particle effect to simulate most of the "cosmic" lighting, starts, comets even galaxy.
Please have a look at http://www.cocos2d-iphone.org/archives/926 , it is particle tutorial
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![enter image description here][1]please I need some help, this should apparently be something very simple and basic to do, but maybe I'm missing something.
I'm quite newbie to Unity3d, I had no much problem with creating a somewhat flashy 2.D scene (I mean 2D with different layers in Z level), scripts, etc. But I'm having trouble to create a "UI Slider" object: when I create it, it just shows nothing on screen. How can I make it visible? I just need to create a very simple, plain slider whose value can be controlled at runtime by means of a script.
thanks.
Well.. since you give nothing to go on, I suggest that you take a look at a tutorial for the UI:
https://unity3d.com/learn/tutorials/modules/beginner/live-training-archive/using-the-ui-tools
If you have troubles after this tutorial, come back with an example of your problem to make people more willing to sacrifice their time in helping you.
Hope this is somewhat useful
Take a look at the Unity3D docs here.
http://docs.unity3d.com/Manual/script-Slider.html
It should have what you are looking for.
We are developing a XNA game with high interactivity. The game includes some background music.
We are trying to play the background music through the MEdiaplayer.play method. But this seems to block the smooth gameplay for a while. How can this be overcome?
Had tried using the soundeffect instance for this initially and it worked fine. But that approach doesn't seem to go well with the certification requirements. Pls help
Thank You
I think this is normal for large music files. You could however try to put
IsFixedTimeStep = false;
after
TargetElapsedTime = TimeSpan.FromTicks(???);
I have found that that makes a smoother gamepay. At least back in 7.0 - but I still use it.
I of course assume that you use elapsed time for all animations.
I am developing an application for viewing images.
I used the example of PhotoScroller Apple to implement this application.
In my application I want to be able to draw on the image.
I had the idea to put a UIView on top with transparent background and draw the lines via touch events. This solution has become very slow because the generated images are very large, around 3700x2000 pixels.
I also tried a solution with the example of Apple GLPaint that uses OpenGL, but it has a size limitation of 2048x2048 pixels.
Anyone have any idea or example of how I implement this?
I think you should try and tile your image.
One option is using CATiledLayer. Have a look at this short tutorial.
Or you could try and use CGContextDrawTiledImage to get your stuff done. Possibly this post from S.O. could help you getting started.
I am currently writing a small graphical performance test benchmark for JavaFX.
Thus, I need to get the current FPS at which the JavaFX scene is being refreshed.
So far, I haven't found a solution how to accomplish this.
Does anyone know if there is some kind of event that I could use in order to get the FPS?
I don't think there is a specific event that gives a frame rate. This reference/example might help. It shows the frame rate when running -- JavaFX FPS Meter . It has a link to source code.
I'm writing a video annotation application with Qt4 in which users need to be able to seek to various points in a video, putting markers on various objects and then setting keypoints for those markers so that they stay on the objects in the video as they move around. QGraphicsItemAnimation seems like a great place to start for these markers, however they need to be able to appear and disappear at specific times, which I can't figure out how to do with the QGraphicsItemAnimation. I could set the scale at 0 to make the objects disappear, but that seems like a pretty hacky solution, and I'm guessing that the paint engine would still waste cpu cycles trying to draw those invisible objects. Does anyone have a better solution than this? I'm using Qt 4.5.3 right now, but I'm willing to upgrade to 4.6 if it makes things easier. Thanks!!
It seems like the functionality you want of showing/hiding QGraphicsItem objects is beyond the scope of the simple "tweening" that the animation class performs. It is only for one object at a time, and any appearance or disappearance you have to write yourself.
You still might get some mileage out of QGraphicsItemAnimation (although the fact that it uses its own timer instead of being locked to the frame clock of your video is a little dodgy).
Neglecting "seeking" for a moment, there is a QTimeLine::finished() signal. If you let the end of an annotation's active animation timeline represent the point where you want it to disappear, you can trigger QGraphicsItem::hide() at that point. When it comes time to turn it back on, you would construct a new QGraphicsItemAnimation (based on the next run of keyframe data for that object) and call QGraphicsItem::show().
Note that one of the headlining features of Qt 4.6 is the QtAnimation framework, which is more sophisticated but also rather complex. I've not used it yet, but looking over the examples it seems like you might be able to "animate" a visibility or opacity property.