I am wanting to animate my drawn data, with controls much like a media player: Play, Stop, fast forward, etc....over my Xaxis - AKA over time....
I have tried creating my own Runnable both on and off the UI thread with no success with making calls to increment the xvalue by small amounts, etc .... but does not move the view port windows.
I can get my chart to animate using chart.centerViewToAnimated, but want to be able to "stop" this animation ... I cannot see how to do this even with a ViewPortHandler...
Any ideas??
It looks like the animation started by chart.centerViewToAnimated(...) cannot be cancelled. So you need to make small steps. If the steps are small enough, you can use chart.centerViewTo(...) (without animation).
I have implemented this with 50ms interval and it looks decent.
Related
I'm using Blender 2.8 and I just have 2 objects: hand and gun and I want to create animations for them. So, for instance, I want to create a simple firing animation. What I do:
1. I create animation for gun
2. I create animation for hand
But if I switch somehow incorrectly I "lose" the first animation I've created. I tried creating fake users and stuff. I just don't get why I select the armature for which I've just created the animation, it plays, but there are no keyframes.
Here's the vid, here's the file.
Ask me questions if you have any.
The movement may be cached in Blender, you may need to reset the movement cache.
Alternatively, you should look at both the Track Controller and Dopesheet(action editor) - the animation may be stored in both.
The movement could be related to parenting ( to an object that is moving )
The movement could also be caused by physics simulation of a rigid body.
Hopefully with the help of the above, you find the problem.
I had the same problem. In the Animation mode (horizontal tabs across the top of the window), click on the object to animate.
The keyframes will appear.
If the object is not selected, the keyframes disappear.
Just leaving this here so that nobody spends 30 minutes trying to work this out, like i just did.
I'd like to play an animation with gsap, but after it has finished playing, I want to reset it. Like after playing that animation, reset, after it is finished. Without clicking anywhere or calculating the play time, sleeping or waiting the process. Just simply something like:
TweenLite.to(thing, 1, {x:'-20px'}).reset();
(ideally, there is no reset call in gsap.. how to acieve this?)
I can't get it to work with .seek(), .time(), .pause().
Those always interrupt the animation.
Preferable I want to use a simple TweenLite, or if it has to, a TimelineLite.
Im searching / looking for it since hours..
There are many ways to do it, but here's a simple one:
TweenLite.to(thing, 1, {x:-20, onComplete:function() {
this.pause(0); //seeks the tween (this) to 0 (playhead's starting position) and pauses immediately.
}});
Does that help?
I have a queston about movment of object in app (game) I am creating. I tried move ImageView with timer. So every 0.01 second object move for 1px. But movement is not smooth. So i also tried with animations. But there is problem, that if I close app and run it again (app was stil opened in background), there are problems, that picture of View stays on the end of animation. And also I want to check every 0.01 second if moving object and my character did colide, so animation is not the best option. Is there a way to move my object smooth with local time on phone? Or there is some other way to move object?
It sounds like you're not using SpriteKit or any game engine for that matter. Any game engine will come with an update loop that does all of this.
You can learn about SpriteKit here... http://www.raywenderlich.com/42699/spritekit-tutorial-for-beginners
I am using CADisplayLink to draw frames using the EAGLView method in a game at 60 times per second.
When I call UIView animateWithDuration: the framerate drops down to exactly half, from 60 to 30 fps for the duration of the animation. Once the animation is over, the fps rises instantly back up to 60.
I also tried using NSTimer animation method instead of CADisplayLink and still get the same result.
The same behavior happens when I press the volume buttons while the speaker icon is fading out, so it may be using animateWithDuration. As I would like to be able to handle the speaker icon smoothly in my app, this means I can't just rewrite my animation code to use a different method other than animateWithDuration, but need to find a solution that works with it.
I am aware that there is an option to slow down animations for debug on the simulator, however, I am experiencing this on the device and no such option is enabled. I also tried using various options for animateWithDuration such as the linear one and the user interaction, but none had an improvement.
I am also aware I can design an engine that can still work with a frame rate that varies widely. However, this is not an ideal solution to this problem, as high fps is desirable for games.
Has someone seen this problem or solved it before?
The solution to this is to do your own animation and blit during the CADisplayLink callback.
1) for the volume issue, put a small volume icon in the corner, or show it if the user takes some predefined touch action, and give them touch controls. With that input you can use AVAudioPlayer to vary the volume, and just avoid the system control altogether. you might even be able to determine the user has pressed the volume buttons, and pop some note saying do it your way. This gets you away from any animations happening by the system.
2) When you have an animation you want to do, well, create a series of images in code (either then or before hand), and every so many callbacks in the displayLink blit the image to the screen.
Here's an old thread that describes similar drops in frame rate. In that case, the cause of the problem was adding two or more semi-transparent sprites, but I'd guess that any time you try to composite several layers together you may be doing enough work to cut the frame rate, and animateWithDuration very likely does exactly that kind of thing.
Either use OpenGL or CoreAnimation. They are not compatible.
To test this remove any UIView animation, the frame rate will be what you expect. Add back UIView animation, it will drop to 30fps.
You said:
When I call UIView animateWithDuration: the framerate drops down to exactly half, from 60 to 30 fps for the duration of the animation. Once the animation is over, the fps rises instantly back up to 60
I dont know why your not accepting my answer, this is exactly what happens when you combine UIView animation with CA animation not using a UIView.
I'm currently running into a problem regarding animation in OpenGL. I have between 200 and 10000 gears on the screen at a time all rotating. When the window is not in maximized view, my CPU runs at about 10-20 % consistently. No spikes, no stuttering in the animation, it runs perfectly smooth regardless of the number of gears on screen. When I maximize the window though, everything falls apart. My CPU maxes out, I begin getting weird spikes in CPU usage, the animation begins stuttering as a result, and it just looks really ugly, even when I have only 200 gears on screen.
My animation technique looks like this:
While Animating
Calculate current rotation angle based on a running timer
draw Image
call glFlush()
End While
If it helps, I'm using the Tao framework in VB.net. I'm not performing any other calculations other than the ones to calculate the rotation angle mentioned above and perform a few glRotateD and glscaleD in the method to draw the image.
In addition, I guess I was under the impression that regardless of the window size in an orthographic 2-dimensional drawing that is scaling on resizing of the window, the drawing time would always take the same amount of time. Is this a correct assumption?
Any help is greatly appreciated =)
Edit
Note that I've seen the animation run perfectly smooth at full screen before. Every once in awhile, OpenGL will decide it's happy and run perfectly at full screen using between 10-20% of the CPU (same as when not maximized). I haven't pinpointed what causes this though, because it will run one time perfectly, then without changing anything, I will run it again and encounter the choppiness. I simply want to pinpoint what causes the animation to slow down and eliminate it.
I've run a dot trace on my program and it says that the swapBuffers method is using 55 % of my processing time even though I'm never explicitly calling the method. Is the method called by something else that I can eliminate, or is this simply OpenGL's "dead time" method to limit the animation to 60 fps?
I was under the impression that regardless of the window size in an orthographic 2-dimensional drawing that is scaling on resizing of the window, the drawing time would always take the same amount of time. Is this a correct assumption?
If only :)
More pixels require more memory bandwidth/shader units/etc. Look into fillrate.