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2014/10/15 ¤U¤È 10:05:51
iphone Programming Glossary: curveshow can i trace the finger movement on touch for drawing smooth curves? http://stackoverflow.com/questions/1052119/how-can-i-trace-the-finger-movement-on-touch-for-drawing-smooth-curves can i trace the finger movement on touch for drawing smooth curves like what i want is if i move my finger fast on the iphone screen then i want like something that it make a proper curve.. spline. This is easier than it sounds since you can easily convert a Catmull Rom spline into a series of cubic Bezier curves. Here's how. Say you have four consecutive sample points P0 P1 P2 and P3 the cubic Bezier curve that connects P1 to P2 is.. you have enough points for the curve to pass through each of the original samples. To get an idea of how Catmull Rom curves look you can try out this Java applet demonstrating Catmull Rom splines . Fit a curve to your samples A more advance and..
How to detect iPhone movement in space using accelerometer? http://stackoverflow.com/questions/2674717/how-to-detect-iphone-movement-in-space-using-accelerometer one direction than the other. This means for example if I draw circles with my device i will see the ball describing curves towards the top left corner of the screen. Something like that http img685.imageshack.us i capturedcran20100422133.png Do..
http://stackoverflow.com/questions/2956967/drawing-path-by-bezier-curves path by Bezier curves I have a task draw smooth curve input set of points they added in realtime current solution I use each 4 points to draw.. 1 strart 2 and 3rd control points 4 end . End point of each curve is start point for the next one. problem at the curves connection I often have fracture angle Can you tell me how to connect my points more smooth Thanks iphone graphics core..
Drawing bezier curves with my finger in iOS? http://stackoverflow.com/questions/4672646/drawing-bezier-curves-with-my-finger-in-ios bezier curves with my finger in iOS Hey I'm trying to figure out how to generate bezier curves in iOS based on user input. Are there.. bezier curves with my finger in iOS Hey I'm trying to figure out how to generate bezier curves in iOS based on user input. Are there any existing classes for this Can someone give me a general summary of what would.. controlPoint1 controlPoint2 method. You can also use a similarly named function with CGPaths. When using bezier curves you need 4 points starting point ending point and a control point at each end to define the curve. One way to define this..
iPhone smooth sketch drawing algorithm http://stackoverflow.com/questions/5076622/iphone-smooth-sketch-drawing-algorithm segments. For the math behind this see this article pointed to in this answer which describes how to calculate the curves required to smooth a curve that passes through multiple points. I believe that the Core Plot framework now has the ability.. a curve that passes through multiple points. I believe that the Core Plot framework now has the ability to smooth the curves of plots so you could look at the code used there to implement this kind of smoothing. There's no magic to any of this as..
How to create custom easing function with Core Animation? http://stackoverflow.com/questions/5161465/how-to-create-custom-easing-function-with-core-animation The code to create the above is simple enough in other frameworks which makes this very frustrating. Note that the curves are mapping input time to output time T t curve and not time position curves. For instance easeOutBounce T t returns a new.. this very frustrating. Note that the curves are mapping input time to output time T t curve and not time position curves. For instance easeOutBounce T t returns a new t . Then that t is used to plot the movement or whatever property we should.. cocoa touch core animation tween share improve this question I found this Cocoa with Love Parametric acceleration curves in Core Animation But I think it can be made a little simpler and more readable by using blocks. So we can define a category..
Coordinates all wrong on iPhone 3G? It could be your compiler http://stackoverflow.com/questions/8391307/coordinates-all-wrong-on-iphone-3g-it-could-be-your-compiler charts. Shortly after publishing an update a user sent me this panicky email the latest update has modified the curves ... not seen more growth curves and inserted data are represented as a line descending ... before you could see perfectly.. an update a user sent me this panicky email the latest update has modified the curves ... not seen more growth curves and inserted data are represented as a line descending ... before you could see perfectly well Help me I get him to send..
Drawing Smooth Curves - Methods Needed http://stackoverflow.com/questions/8702696/drawing-smooth-curves-methods-needed all I get are jagged ends where they intersect when I just shift the points 1 2 3 4 2 3 4 5. I have heard of spline curves and all the other types. I am quite new to iPhone programming and do not understand how to program it in my quartz drawing..
iPhone, Map, Clickable non-rectangular areas http://stackoverflow.com/questions/870631/iphone-map-clickable-non-rectangular-areas touched what region it was but for the life of me short of making many many many rectangles to do a best fit on the curves I can't figure out how to do this. Any ideas EDIT The regions could be as hard as this... link text iphone imagemap share..
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