2014/10/15 下午 10:14:43

iphone Programming Glossary: tangent

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

points created using curveToPoint controlPoint1 controlPoint2 in your cocoa application How do you find points and the tangents along the curve Later for a complete and simplified solution based on Michal's answer below click to Find the tangent of.. tangents along the curve Later for a complete and simplified solution based on Michal's answer below click to Find the tangent of a point on a cubic bezier curve on an iPhone . iphone ipad bezier bezier curve share improve this question There's..

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

the tangent of a point on a cubic bezier curve on an iPhone For a cubic bezier curve with the usual four points a b c d ... For a given.. For a cubic bezier curve with the usual four points a b c d ... For a given value t how to most elegantly find the tangent at that point See Find a point a given distance along a simple cubic bezier curve. On an iPhone for Michal's fabulous code.. curve. On an iPhone for Michal's fabulous code to find the points along a bezier curve. But how to calculate the tangent LATER........ Here is a complete answer in code which works and runs It draws approxidistant points along the curve and..

How do I detect a touch on a UIBezierPath and move a ball along that?

http://stackoverflow.com/questions/4854035/how-do-i-detect-a-touch-on-a-uibezierpath-and-move-a-ball-along-that

given thickness. After that assuming we are talking about cubics you need to find points and likely velocities a.k.a. tangents along a bezier. Here is the exact total code to do that Find the tangent of a point on a cubic bezier curve on an iPhone.. to find points and likely velocities a.k.a. tangents along a bezier. Here is the exact total code to do that Find the tangent of a point on a cubic bezier curve on an iPhone . . I pasted it in below too. You will have to implement your own MCsim.. possible fashion are the two routines to calculate equidistant points in fact approximately equidistant and the tangents of those along a bezier cubic CGFloat bezierPoint CGFloat t CGFloat a CGFloat b CGFloat c CGFloat d CGFloat C1 d 3.0 c..

Need some help understanding transient properties in Core Data

http://stackoverflow.com/questions/7504391/need-some-help-understanding-transient-properties-in-core-data

provides a key that the context can observe without saving. If you have a fault sending it a key value message for a tangent property will trigger the context to fire the fault and load the complete managed object. Okay but what if I have an instance.. provides a key that the context can observe without saving. If you have a fault sending it a key value message for a tangent property will trigger the context to fire the fault and load the complete managed object. It is important to note that although.. instantiated and loaded. This means that when you do any fetches which operate solely in the persistent store the tangent properties will have no values. In your case you want to use a transient property for grid if the value of grid depends..