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2014/10/15 ¤U¤È 10:10:32
iphone Programming Glossary: intersectionhttp://stackoverflow.com/questions/1021801/cgpathref-intersection intersection Is there a way to find out whether two CGPathRefs are intersected or not. In my case all the CGPaths are having closePath... clipping process initialise and erase context CGContextAddPath context path1 CGContextClip context set fill colour to intersection colour CGContextAddPath context path2 CGContextFillPath context search for pixels that match intersection colour This works.. colour to intersection colour CGContextAddPath context path2 CGContextFillPath context search for pixels that match intersection colour This works because clipping intersecting. Don't forget that intersection depends on the definition of interiority..
Objective-C check if subviews of rotated UIViews intersect? http://stackoverflow.com/questions/15710853/objective-c-check-if-subviews-of-rotated-uiviews-intersect something like this I need to prevent users from making these UIImageViews intersect but I have no idea how to check intersection between the two UIImageViews since not only do their frames not apply to the parent UIView but also they are rotated without.. their frames. The only results from my attempts have been unsuccessful. Any ideas iphone ios objective c frame intersection share improve this question The following algorithm can be used to check if two rotated or otherwise transformed views..
OpenGL ES (iPhone) Touch Picking http://stackoverflow.com/questions/2231433/opengl-es-iphone-touch-picking party libs GLU ports and OpenGL name stacks etc are out. This pretty much leaves inverse view transformation and ray intersection correct I've gotten pretty far with the help of http trac.bookofhook.com bookofhook trac.cgi wiki MousePicking http eigenclass.blogspot.com..
iPhone image stretching (skew) http://stackoverflow.com/questions/2351586/iphone-image-stretching-skew A naive transformation rule is y c x' x p1.x ”——————†p1.x p1.y c y' y where c is the y coordinate of the intersection point of the lines joining p1 and p3 and p2 and p4. Now notice the x y factor in the transformation. This indicates such..
UIKeyboardFrameBeginUserInfoKey & UIKeyboardFrameEndUserInfoKey http://stackoverflow.com/questions/3332364/uikeyboardframebeginuserinfokey-uikeyboardframeenduserinfokey only for the size information it contains. Do not use the origin of the rectangle which is always 0.0 0.0 in rectangle intersection operations . At least on the iPad on OS 3.2 this is not true. Both rects have the same size while the origin which is in..
Drawing in CATiledLayer with CoreGraphics CGContextDrawImage http://stackoverflow.com/questions/4067512/drawing-in-catiledlayer-with-coregraphics-cgcontextdrawimage drawRect gives you the whole bounds. Knowing this you can remove the row and column iteration as well as the CGRect intersection for the edge tiles and just draw to the rect once you've translated the context. Here's what I've ended up with void drawLayer..
OpenGL-ES 2.0 VS OpenGL-ES 1.1, which is faster? http://stackoverflow.com/questions/5682010/opengl-es-2-0-vs-opengl-es-1-1-which-is-faster the number of triangles required would be ridiculous also billboards wouldn't work well for my cylinders and the intersection of these shapes wouldn't be handled right in that case . A million triangles might be a bit much for these devices. In my..
Finding Intersection of NSMutableArrays http://stackoverflow.com/questions/6023548/finding-intersection-of-nsmutablearrays Angelica NSMutableArray array3 @ Jack @ Jerome @ Dan @ Lindsay @ Lisa I want to find a fourth array which includes the intersection of those three arrays. In this case for example it will be NSMutableArray array4 @ Jack @ Lisa Because all the three array.. Because all the three array have jack and lisa as an element. Is there way of simply doing this iphone nsmutablearray intersection share improve this question Use NSMutableSet NSMutableSet intersection NSMutableSet setWithArray array1 intersection.. of simply doing this iphone nsmutablearray intersection share improve this question Use NSMutableSet NSMutableSet intersection NSMutableSet setWithArray array1 intersection intersectSet NSSet setWithArray array2 intersection intersectSet NSSet setWithArray..
How can I improve the performance of my custom OpenGL ES 2.0 depth texture generation? http://stackoverflow.com/questions/6051237/how-can-i-improve-the-performance-of-my-custom-opengl-es-2-0-depth-texture-gener devices to efficiently strip out fragments that would never appear onscreen under any conditions yet still give smooth intersections between the visible sphere impostors based on per pixel depth values. This is depicted in my crude illustration below In.. of the fragments from the lowest impostor. The frontmost impostors can then use per pixel tests to generate a smooth intersection while many of the pixels from the rear impostor don't waste GPU cycles by being rendered. I hadn't thought to disable depth..
Drawing Smooth Curves - Methods Needed http://stackoverflow.com/questions/8702696/drawing-smooth-curves-methods-needed This was my code for the UIBezierPath which left edges at intersection UPDATED TO AN ANSWER BELOW #define VALUE _INDEX_ NSValue valueWithCGPoint points _INDEX_ #define POINT _INDEX_ NSValue points..
http://stackoverflow.com/questions/8859285/uibezierpath-subtract-path clipping path. You have to use a trick though. When you add a path to the clipping path the new clipping path is the intersection of the old clipping path and the added path. So if you just add smallMaskPath to the clipping path you will end up filling..
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