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2014/10/15 ¤U¤È 10:11:35
iphone Programming Glossary: multiplyingOpenGL ES 2.0 texture distortion on large geometry GL_REPEAT http://stackoverflow.com/questions/11370074/opengl-es-2-0-texture-distortion-on-large-geometry-gl-repeat banding effect still occurs even when using GL_CLAMP Dividing the texture coords passed to the vertex shader and then multiplying them back to the correct values in the fragment shader also does not work precision highp sampler2D highp float highp int..
http://stackoverflow.com/questions/1204000/iphone-uilabel-sizewithfont your text calculation try getting the size of one line with this _price.text sizeWithFont _price.font .height and then multiplying that by the maximum # of lines you want then plugging that into the height of the size you are constraining yourself to...
How to get the RGB values for a pixel on an image on the iphone http://stackoverflow.com/questions/144250/how-to-get-the-rgb-values-for-a-pixel-on-an-image-on-the-iphone red i green i blue i . pixelData 0 .red pixelData 0 .green pixelData 0 .blue You can determine the desired index by multiplying row column. return pixelData Step 5. I made an accessor method RGBPixel pixelDataForRow int row column int column Return..
Audio Processing: Playing with volume level http://stackoverflow.com/questions/3982723/audio-processing-playing-with-volume-level services just to get access to the volume property is serious serious overkill. UPDATE In your updated code you're multiplying each byte by 0.5 instead of each sample. Here's a quick and dirty fix for your code but see my notes below . I wouldn't..
http://stackoverflow.com/questions/4130821/iphone-compass-gps-direction lat1 sin lat2 sin lat1 cos lat2 cos lon2 lon1 This gives you a bearing in radians which you can convert to degrees by multiplying by 180 . The value is then between 180 and 180 degrees so to get a standard compass bearing add 360 to any negative answers...
http://stackoverflow.com/questions/4235635/operation-between-hours in text field 1 I have 30 minutes subtracting 30 minutes to 2.5hours will be 2 hours in text field 2 I have number 3 multiplying number 3 to 2 hours I will have 6. I would like to return 6 in the label I could solve the part where I have the date picker..
in iPhone App How to detect the screen resolution of the device http://stackoverflow.com/questions/4779221/in-iphone-app-how-to-detect-the-screen-resolution-of-the-device simple thing. CGSize screenSize CGSizeMake screenBounds.size.width screenScale screenBounds.size.height screenScale By multiplying by the screen's scale you get the actual pixel resolution. The usefulness of this code is that it will work in later products..
How to use NSString's sizeWithFont and drawInRect to workout how much of a string to draw http://stackoverflow.com/questions/4965809/how-to-use-nsstrings-sizewithfont-and-drawinrect-to-workout-how-much-of-a-strin theFont.lineHeight CGFloat optimalPageHeight linesWithoutClipping theFont.lineHeight Taking the floor value 18 and multiplying with the font line height 16 we get an optimal page height of 288 to ensure there's no clipping. Note that lineHeight was..
Is programmatically inverting the colors of an image possible? http://stackoverflow.com/questions/6672517/is-programmatically-inverting-the-colors-of-an-image-possible it runs through every pixel converting from premultiplied alpha to uninflected RGB inverting each channel separately multiplying by alpha again and storing back gets an image from the context and wraps it into a UIImage cleans up after itself and returns..
Accelerometer Low Pass Filtering http://stackoverflow.com/questions/6942626/accelerometer-low-pass-filtering question accelX acceleration.x kFilteringFactor accelX 1.0 kFilteringFactor Whats happening in this code you are multiplying the acceleration at the moment by the Filtering factor 0.1 and then adding it to the filtered acceleration of the last time..
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