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2014/10/15 ¤U¤È 10:16:04
iphone Programming Glossary: y2How to draw a gradient line (fading in/out) with Core Graphics/iPhone? http://stackoverflow.com/questions/1303855/how-to-draw-a-gradient-line-fading-in-out-with-core-graphics-iphone CGContextSetRGBStrokeColor context 1.0 1.0 1.0 1.0 CGContextMoveToPoint context x y CGContextAddLineToPoint context x2 y2 CGContextStrokePath context And I know how to do a gradient rectangle i.g. CGColorSpaceRef myColorspace CGColorSpaceCreateDeviceRGB.. which fortunately is what I need. I replaced CGContextMoveToPoint context x y CGContextAddLineToPoint context x2 y2 CGContextStrokePath context with CGContextSaveGState context CGContextAddRect context CGRectMake x y width height CGContextClip..
A question on how to Get data from plist & how should it be layout http://stackoverflow.com/questions/1605310/a-question-on-how-to-get-data-from-plist-how-should-it-be-layout by array tap1 Array item 1 x1 coordinate Number item 2 y1 coordinate Number item 3 x2 coordinate Number item 4 y2 coordinate Number item 5 x3 coordinate Number item 6 y3 coordinate Number tap2 Array item 1 x1 coordinate Number item 2.. Number tap2 Array item 1 x1 coordinate Number item 2 y1 coordinate Number item 3 x2 coordinate Number item 4 y2 coordinate Number p2.jpg image represented by array tap1 item 1....etc Could someone please direct me to the right path..
Point to location using compass http://stackoverflow.com/questions/5092845/point-to-location-using-compass location coordinate float x1 coordinate.latitude float y1 coordinate.longitude float x2 annLatitude floatValue float y2 annLongitude floatValue float dx x2 x1 float dy y2 y1 if dx 0 if dy 0 result 90 else result 270 else result atan dy dx.. float y1 coordinate.longitude float x2 annLatitude floatValue float y2 annLongitude floatValue float dx x2 x1 float dy y2 y1 if dx 0 if dy 0 result 90 else result 270 else result atan dy dx 180 M_PI if dx 0 result result 180 if result 0 result..
How to Draw a line pixel by pixel using objective C http://stackoverflow.com/questions/5514410/how-to-draw-a-line-pixel-by-pixel-using-objective-c is the code where i am drawing a wave using the values from an array static int i 0 int x 10 int y 0 int x2 int y2 void drawRect CGRect rect Drawing code. CGContextRef c UIGraphicsGetCurrentContext CGFloat black 4 0.0f 0.0f 0.0f 1.0f CGContextSetStrokeColor.. c NSLog @ fired... int ecg 358 36 37 37 36 34 33 33 .... 36 Assume the data is there CGContextMoveToPoint c x y x2 i y2 ecg i CGContextAddLineToPoint c x2 y2 x x2 y y2 CGContextStrokePath c self setNeedsDisplay i void awakeFromNib NSTimer timer.. 37 36 34 33 33 .... 36 Assume the data is there CGContextMoveToPoint c x y x2 i y2 ecg i CGContextAddLineToPoint c x2 y2 x x2 y y2 CGContextStrokePath c self setNeedsDisplay i void awakeFromNib NSTimer timer timer NSTimer scheduledTimerWithTimeInterval..
Rotate a Sprite on a bezier path with touch - Cocos2D/Box2D http://stackoverflow.com/questions/7494795/rotate-a-sprite-on-a-bezier-path-with-touch-cocos2d-box2d initialization of 100 guides and it works without CPU overload. Each bezier curve is an array with 8 floats x1 y1 x2 y2 x3 y3 x4 y4. where x1 y1 and x4 y4 are the arc's end points and x2 y2 and x3 y3 are the cubic bezier's control points. @note.. bezier curve is an array with 8 floats x1 y1 x2 y2 x3 y3 x4 y4. where x1 y1 and x4 y4 are the arc's end points and x2 y2 and x3 y3 are the cubic bezier's control points. @note adapted for xCode by Valentine Konov valentine @konov.su 2013 @return.. Konov valentine @konov.su 2013 @param from radians a1 to a2 where a2 a1 pi 2 @return an array with 8 floats x1 y1 x2 y2 x3 y3 x4 y4. where x1 y1 and x4 y4 are the arc's end points and x2 y2 and x3 y3 are the cubic bezier's control points. NSArray..
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