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2014/10/15 ¤U¤È 10:14:42

iphone Programming Glossary: t3

How do i rotate a CALayer around a diagonal line?

http://stackoverflow.com/questions/2394807/how-do-i-rotate-a-calayer-around-a-diagonal-line

a scale value going from 1.0 to 0.1 to 1.0 float scale MAX fabs float frames i 2 frames 1 0.1 CGAffineTransform t1 t2 t3 t1 CGAffineTransformMakeRotation angle t2 CGAffineTransformScale t1 scale 1.0f t3 CGAffineTransformRotate t2 angle CATransform3D.. frames 1 0.1 CGAffineTransform t1 t2 t3 t1 CGAffineTransformMakeRotation angle t2 CGAffineTransformScale t1 scale 1.0f t3 CGAffineTransformRotate t2 angle CATransform3D trans CATransform3DMakeAffineTransform t3 values addObject NSValue valueWithCATransform3D.. t1 scale 1.0f t3 CGAffineTransformRotate t2 angle CATransform3D trans CATransform3DMakeAffineTransform t3 values addObject NSValue valueWithCATransform3D trans times addObject NSNumber numberWithFloat float i frames 1 rotate.values..

Find a point, a given distance, along a simple cubic bezier curve. (On an iPhone!)

http://stackoverflow.com/questions/4058979/find-a-point-a-given-distance-along-a-simple-cubic-bezier-curve-on-an-iphone

MBBezierView.h CGFloat bezierInterpolation CGFloat t CGFloat a CGFloat b CGFloat c CGFloat d CGFloat t2 t t CGFloat t3 t2 t return a a 3 t 3 a a t t 3 b t 6 b b 3 t t c 3 c 3 t t2 d t3 @implementation MBBezierView void drawRect CGRect rect.. CGFloat b CGFloat c CGFloat d CGFloat t2 t t CGFloat t3 t2 t return a a 3 t 3 a a t t 3 b t 6 b b 3 t t c 3 c 3 t t2 d t3 @implementation MBBezierView void drawRect CGRect rect CGPoint p1 p2 p3 p4 p1 CGPointMake 30 rect.size.height 0.33 p2 CGPointMake..

Find the tangent of a point on a cubic bezier curve (on an iPhone)

http://stackoverflow.com/questions/4089443/find-the-tangent-of-a-point-on-a-cubic-bezier-curve-on-an-iphone

below for another way to do this that follows the 'coefficients' idea and is a little clearer CGFloat t2 t t CGFloat t3 t2 t return a a 3 t 3 a a t t 3 b t 6 b b 3 t t c 3 c 3 t t2 d t3 CGFloat bezierTangent CGFloat t CGFloat a CGFloat b CGFloat.. idea and is a little clearer CGFloat t2 t t CGFloat t3 t2 t return a a 3 t 3 a a t t 3 b t 6 b b 3 t t c 3 c 3 t t2 d t3 CGFloat bezierTangent CGFloat t CGFloat a CGFloat b CGFloat c CGFloat d note that abcd are aka x0 x1 x2 x3 the four coefficients..