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Questions tagged [rotation]

A rotation is a circular movement of an object around a center (or point) of rotation. On a mobile device, it indicates the change of orientation.

A three-dimensional object rotates always around an imaginary line called a rotation axis. If the axis is within the body, and passes through its center of mass the body is said to rotate upon itself, or spin. A rotation about an external point, e.g. the Earth about the Sun, is called a revolution or orbital revolution, typically when it is produced by gravity.

Mathematically, a rotation is a rigid body movement which, unlike a translation, keeps a point fixed. This definition applies to rotations within both two and three dimensions (in a plane and in space, respectively.)

A rotation is commonly represented using , a rotation or .

On a mobile device, it indicates the change of orientation.

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Activity restart on rotation Android

In my Android application, when I rotate the device (slide out the keyboard) then my Activity is restarted (onCreate is called). Now, this is probably how it's supposed to be, but I do a lot of initial setting up in the onCreate method, so I need…
Isaac Waller
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Rotating videos with FFmpeg

I have been trying to figure out how to rotate videos with FFmpeg. I am working with iPhone videos taken in portrait mode. I know how to determine the current degrees of rotation using MediaInfo (excellent library, btw) but I'm stuck on FFmpeg…
jocull
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Why does an image captured using camera intent gets rotated on some devices on Android?

I'm capturing an image and setting it to image view. public void captureImage() { Intent intentCamera = new Intent("android.media.action.IMAGE_CAPTURE"); File filePhoto = new File(Environment.getExternalStorageDirectory(), "Pic.jpg"); …
Shirish Herwade
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Prevent screen rotation on Android

I have one of my activities which I would like to prevent from rotating because I'm starting an AsyncTask, and screen rotation makes it restart. Is there a way to tell this activity "DO NOT ROTATE the screen even if the user is shaking his phone…
Sephy
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CSS3 Rotate Animation

Cannot get this animated image to work, it is supposed to do a 360 degrees rotation. I guess something's wrong with the CSS below, as it just stays still. .image { float: left; …
Nikk
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Evenly space multiple views within a container view

Auto Layout is making my life difficult. In theory, it was going to be really useful when I switched, but I seem to fight it all of the time. I've made a demo project to try to find help. Does anyone know how to make the spaces between views…
nothappybob
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css rotate a pseudo :after or :before content:""

anyway to make a rotation work on the pseudo content:"\24B6"? I'm trying to rotate a unicode symbol.
devric
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Android: Rotate image in imageview by an angle

I am using the following code to rotate a image in ImageView by an angle. Is there any simpler and less complex method available. ImageView iv = (ImageView)findViewById(imageviewid); TextView tv = (TextView)findViewById(txtViewsid); Matrix mat = new…
rijinrv
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JS Client-Side Exif Orientation: Rotate and Mirror JPEG Images

Digital camera photos are often saved as JPEG with an EXIF "orientation" tag. To display correctly, images need to be rotated/mirrored depending on which orientation is set, but browsers ignore this information rendering the image. Even in large…
flexponsive
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Position fixed doesn't work when using -webkit-transform

I am using -webkit-transform (and -moz-transform / -o-transform) to rotate a div. Also have position fixed added so the div scrolls down with the user. In Firefox it works fine, but in webkit based browsers it's broken. After using the…
iSenne
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Android: Bitmaps loaded from gallery are rotated in ImageView

When I load an image from the media gallery into a Bitmap, everything is working fine, except that pictures that were shot with the camera while holding the phone vertically, are rotated so that I always get a horizontal picture even though it…
Manuel
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Best practices for circular shift (rotate) operations in C++

Left and right shift operators (<< and >>) are already available in C++. However, I couldn't find out how I could perform circular shift or rotate operations. How can operations like "Rotate Left" and "Rotate Right" be performed? Rotating right…
Elroy
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Rotate the elements in an array in JavaScript

I was wondering what was the most efficient way to rotate a JavaScript array. I came up with this solution, where a positive n rotates the array to the right, and a negative n to the left (-length < n < length) : Array.prototype.rotateRight =…
Jean Vincent
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Further understanding setRetainInstance(true)

What exactly happens when you call setRetainInstance(true) on a Fragment? The documentation is virtually non-existent and this seems like a very important function. Specifically I want to know how much of this sequence (that I made up) is…
Timmmm
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Python list rotation

I'd like to rotate a Python list by an arbitrary number of items to the right or left (the latter using a negative argument). Something like this: >>> l = [1,2,3,4] >>> l.rotate(0) [1,2,3,4] >>> l.rotate(1) [4,1,2,3] >>> l.rotate(-1) [2,3,4,1] >>>…
Drew Noakes
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