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2014/10/15 ¤U¤È 10:12:33
iphone Programming Glossary: perspectiveiPhone image stretching (skew) http://stackoverflow.com/questions/2351586/iphone-image-stretching-skew p1 p2 p3 p4. Then I need to set p4.x 50 p4.y 30. So this corner p4 should be stretched in a 2D perspective and the image should be distorted. I tried to use CATransform3D but it seems that this cannot be done.. use CATransform3D but it seems that this cannot be done in such way since it's only a change the perspective of view rotate bring closer farther one side . Maybe CGAffineTransform can be useful If you know the..
iphone webkit css animations cause flicker http://stackoverflow.com/questions/2946748/iphone-webkit-css-animations-cause-flicker mostly helped but I still had an initial flicker after reloading the page. When I added webkit perspective 1000 there was no flicker whatsoever. webkit perspective 1000 webkit backface visibility hidden share..
Using the apple FFT and accelerate Framework http://stackoverflow.com/questions/3398753/using-the-apple-fft-and-accelerate-framework so that we can squash the return value into the same space as the send value. To give some perspective like as in why would we be using this function in the first place Let's say we want to perform pitch..
How do I apply a perspective transform to a UIView? http://stackoverflow.com/questions/347721/how-do-i-apply-a-perspective-transform-to-a-uiview do I apply a perspective transform to a UIView I'm looking to perform a perspective transform on a UIView such as seen in coverflow.. do I apply a perspective transform to a UIView I'm looking to perform a perspective transform on a UIView such as seen in coverflow Does anyonew know if this is possible I've investigated.. with the UIView's layer using a CATransform3D to perform the layer's rotation. The trick to get perspective working as described here is to directly access one of the matrix cells of the CATransform3D m34 . Matrix..
Understanding reference counting with Cocoa and Objective-C http://stackoverflow.com/questions/6578/understanding-reference-counting-with-cocoa-and-objective-c necessary way to tell the system to free this object up after a little while. From a plumbing perspective when autorelease is called the current thread's NSAutoreleasePool is alerted of the call. The NSAutoreleasePool.. after the current iteration of the event loop it can call release on the object. From our perspective as programmers it takes care of calling release for us so we don't have to and in fact we shouldn't..
performSelector may cause a leak because its selector is unknown http://stackoverflow.com/questions/7017281/performselector-may-cause-a-leak-because-its-selector-is-unknown that's returned from methodForSelector even though you don't want to use it. From the compiler's perspective it is an object after all. That means that if the method you're calling someMethod is returning a non..
iCloud basics and code sample [closed] http://stackoverflow.com/questions/7795629/icloud-basics-and-code-sample daemon handles all of the work of making sure that the local copies are the same. So from the perspective of your app the file just is in iCloud. All changes you make to a file or directory in iCloud must be..
Transforming a rectangle image into a quadrilateral using a CATransform3D http://stackoverflow.com/questions/9470493/transforming-a-rectangle-image-into-a-quadrilateral-using-a-catransform3d Photoshop calls this transformation Distort. But according to the source of this quadrilateral the perspective of the image moving in space it is in fact the combination of a scale a rotation and a perspective matrix... perspective of the image moving in space it is in fact the combination of a scale a rotation and a perspective matrix. I am wondering if this is possible using a CATransform3D 4x4 matrix. Do you have any hints on..
iPhone image stretching (skew) http://stackoverflow.com/questions/2351586/iphone-image-stretching-skew skew an image For example each corner has a CGPoint with coords p1 p2 p3 p4. Then I need to set p4.x 50 p4.y 30. So this corner p4 should be stretched in a 2D perspective and the image should be distorted. I tried to use CATransform3D but it seems that this cannot be done in such way since it's only a change the perspective of view.. 2D perspective and the image should be distorted. I tried to use CATransform3D but it seems that this cannot be done in such way since it's only a change the perspective of view rotate bring closer farther one side . Maybe CGAffineTransform can be useful If you know the answer please write a sample code. Thanks in advance iphone..
iphone webkit css animations cause flicker http://stackoverflow.com/questions/2946748/iphone-webkit-css-animations-cause-flicker
Using the apple FFT and accelerate Framework http://stackoverflow.com/questions/3398753/using-the-apple-fft-and-accelerate-framework overwritten That's the reason for all this special packing malarkey so that we can squash the return value into the same space as the send value. To give some perspective like as in why would we be using this function in the first place Let's say we want to perform pitch detection on microphone input and we have set it up so that..
How do I apply a perspective transform to a UIView? http://stackoverflow.com/questions/347721/how-do-i-apply-a-perspective-transform-to-a-uiview do I apply a perspective transform to a UIView I'm looking to perform a perspective transform on a UIView such as seen in coverflow Does anyonew know if this is possible I've investigated.. do I apply a perspective transform to a UIView I'm looking to perform a perspective transform on a UIView such as seen in coverflow Does anyonew know if this is possible I've investigated using CALayer and have run through all the pragmatic programmer.. share improve this question As Ben said you'll need to work with the UIView's layer using a CATransform3D to perform the layer's rotation. The trick to get perspective working as described here is to directly access one of the matrix cells of the CATransform3D m34 . Matrix math has never been my thing so I can't explain exactly..
Understanding reference counting with Cocoa and Objective-C http://stackoverflow.com/questions/6578/understanding-reference-counting-with-cocoa-and-objective-c autorelease . Autorelease is used as a convenient and sometimes necessary way to tell the system to free this object up after a little while. From a plumbing perspective when autorelease is called the current thread's NSAutoreleasePool is alerted of the call. The NSAutoreleasePool now knows that once it gets an opportunity after.. The NSAutoreleasePool now knows that once it gets an opportunity after the current iteration of the event loop it can call release on the object. From our perspective as programmers it takes care of calling release for us so we don't have to and in fact we shouldn't . What's important to note is that again by convention all object..
performSelector may cause a leak because its selector is unknown http://stackoverflow.com/questions/7017281/performselector-may-cause-a-leak-because-its-selector-is-unknown ARC enabled that it can't retain and release the object value that's returned from methodForSelector even though you don't want to use it. From the compiler's perspective it is an object after all. That means that if the method you're calling someMethod is returning a non object including void you could end up with a garbage pointer..
iCloud basics and code sample [closed] http://stackoverflow.com/questions/7795629/icloud-basics-and-code-sample so that it can be distributed to other devices. The iCloud daemon handles all of the work of making sure that the local copies are the same. So from the perspective of your app the file just is in iCloud. All changes you make to a file or directory in iCloud must be made using a file coordinator object. These changes include..
Transforming a rectangle image into a quadrilateral using a CATransform3D http://stackoverflow.com/questions/9470493/transforming-a-rectangle-image-into-a-quadrilateral-using-a-catransform3d this image so that it is fits the quadrilateral Q. Photoshop calls this transformation Distort. But according to the source of this quadrilateral the perspective of the image moving in space it is in fact the combination of a scale a rotation and a perspective matrix. I am wondering if this is possible using a CATransform3D.. But according to the source of this quadrilateral the perspective of the image moving in space it is in fact the combination of a scale a rotation and a perspective matrix. I am wondering if this is possible using a CATransform3D 4x4 matrix. Do you have any hints on how to do that I've tried to take the four points and build..
How to merge the perspective image(3D Transform)? http://stackoverflow.com/questions/12457047/how-to-merge-the-perspective-image3d-transform to merge the perspective image 3D Transform How to merge these two images see attached image .I am using the below code. Its working for ordinary.. So what you are truly looking for is how to apply a 3D transform to an image. More precisely as you are looking for perspective in you own words you are looking on how to warp an homography to an image. The CoreImage programming guide specify that.. only the result blend and not manipulate it you can use two UIImageView s on top of each other the one containing the perspective image being transformed using a cleverly designed CATransform3D If you absolutely need to blend the images you will need..
iPhone image stretching (skew) http://stackoverflow.com/questions/2351586/iphone-image-stretching-skew a CGPoint with coords p1 p2 p3 p4. Then I need to set p4.x 50 p4.y 30. So this corner p4 should be stretched in a 2D perspective and the image should be distorted. I tried to use CATransform3D but it seems that this cannot be done in such way since.. distorted. I tried to use CATransform3D but it seems that this cannot be done in such way since it's only a change the perspective of view rotate bring closer farther one side . Maybe CGAffineTransform can be useful If you know the answer please write..
iphone webkit css animations cause flicker http://stackoverflow.com/questions/2946748/iphone-webkit-css-animations-cause-flicker visiblity and that mostly helped but I still had an initial flicker after reloading the page. When I added webkit perspective 1000 there was no flicker whatsoever. webkit perspective 1000 webkit backface visibility hidden share improve this answer..
Using the apple FFT and accelerate Framework http://stackoverflow.com/questions/3398753/using-the-apple-fft-and-accelerate-framework special packing malarkey so that we can squash the return value into the same space as the send value. To give some perspective like as in why would we be using this function in the first place Let's say we want to perform pitch detection on microphone..
How do I apply a perspective transform to a UIView? http://stackoverflow.com/questions/347721/how-do-i-apply-a-perspective-transform-to-a-uiview do I apply a perspective transform to a UIView I'm looking to perform a perspective transform on a UIView such as seen in coverflow Does anyonew.. do I apply a perspective transform to a UIView I'm looking to perform a perspective transform on a UIView such as seen in coverflow Does anyonew know if this is possible I've investigated using CALayer and.. you'll need to work with the UIView's layer using a CATransform3D to perform the layer's rotation. The trick to get perspective working as described here is to directly access one of the matrix cells of the CATransform3D m34 . Matrix math has never..
How do I open the Settings application from my application? http://stackoverflow.com/questions/377102/how-do-i-open-the-settings-application-from-my-application
Understanding reference counting with Cocoa and Objective-C http://stackoverflow.com/questions/6578/understanding-reference-counting-with-cocoa-and-objective-c convenient and sometimes necessary way to tell the system to free this object up after a little while. From a plumbing perspective when autorelease is called the current thread's NSAutoreleasePool is alerted of the call. The NSAutoreleasePool now knows.. once it gets an opportunity after the current iteration of the event loop it can call release on the object. From our perspective as programmers it takes care of calling release for us so we don't have to and in fact we shouldn't . What's important to..
performSelector may cause a leak because its selector is unknown http://stackoverflow.com/questions/7017281/performselector-may-cause-a-leak-because-its-selector-is-unknown the object value that's returned from methodForSelector even though you don't want to use it. From the compiler's perspective it is an object after all. That means that if the method you're calling someMethod is returning a non object including void..
iCloud basics and code sample [closed] http://stackoverflow.com/questions/7795629/icloud-basics-and-code-sample devices. The iCloud daemon handles all of the work of making sure that the local copies are the same. So from the perspective of your app the file just is in iCloud. All changes you make to a file or directory in iCloud must be made using a file..
http://stackoverflow.com/questions/8482327/learning-opengles-2-0-on-ios ES 2.0 material for iOS or any OS really than it used to be a year or so ago. For something written from a pure iOS perspective it's hard to beat Jeff LaMarche's chapters from his unpublished book which start here . You linked to his OpenGL ES 1.1..
Transforming a rectangle image into a quadrilateral using a CATransform3D http://stackoverflow.com/questions/9470493/transforming-a-rectangle-image-into-a-quadrilateral-using-a-catransform3d quadrilateral Q. Photoshop calls this transformation Distort. But according to the source of this quadrilateral the perspective of the image moving in space it is in fact the combination of a scale a rotation and a perspective matrix. I am wondering.. quadrilateral the perspective of the image moving in space it is in fact the combination of a scale a rotation and a perspective matrix. I am wondering if this is possible using a CATransform3D 4x4 matrix. Do you have any hints on how to do that I've..
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