ios - Flex Degrafa's bezier spline under AIR 3.9 -


i have mobile flex project running on ios has been using degrafa's library in order use bezierspline class. purpose able draw directly on screen, collection of points given user gesture converted bezier curve using library.

however, app has been crashing displaying page containing @ least 1 of these curves. don't error, stacktrace or anything, app killed , i'm taken ios desktop. apparently error occurring somewhere inside .draw() function of bezierspline class.

also, i've noticed occuring on release versions of app, either through appstore (looks didn't notice it) or through release package deployed on ipad. working fine in emulator or debug package directly on device. since haven't made release packages time, i'm not sure modification may have caused this. thing know i've updated flash builder 4.7 , air 3.9 (which required other features of project).

so have 3 questions:

  • in case can app crash in release mode , not in debug mode? code remains same.

  • has ever encountered kind of issue using degrafa , bezierspline class?

  • may caused upgrading air latest 3.9 version?

edit: i've tested exact same code under android device, curve displaying correctly, occuring when deployed on ios device.

i ended implementing helpful example written lee burrows here. here need in single call:

static public function getpoint(t:number, points:array):point     {         var x:number = 0;         var y:number = 0;         var n:uint = points.length-1;         var factn:number = factoral(n);          (var i:uint=0;i<=n;i++)         {             //calc binominal coefficent             var b:number = factn/(factoral(i)*factoral(n-i));             //calc powers             var k:number = math.pow(1-t, n-i)*math.pow(t, i);             //add weighted points totals             x += b*k*points[i].x;             y += b*k*points[i].y;         }          return new point(x, y);     }      static private function factoral(value:uint):number     {         if (value==0) return 1;          var total:number = value;         while (--value>1)             total *= value;          return total;     }

a sample code using class available @ link above.

the drawback of solution have handle manually curve smoothness defining amount of lines curve made of (by changing "t" incrementation). define incrementation dynamically depending of amount of control points, or distance between them.

anyway more enough problem had, hope helps else.


-

Comments

Post a Comment

Popular posts from this blog

html - Sizing a high-res image (~8MB) to display entirely in a small div (circular, diameter 100px) -

first of all, thank being patient know simple question more couple of weeks' experience figure out. i've seen folks persevere , helpful on here , hope you're willing me. here fiddle: http://jsfiddle.net/65uzf/ here 1 of places searched answers on here: ( vertically center image thumbnails fix-sized div ) tried solutions on there , didn't work out me. i've searched ~4 or 5 others, , been unsuccessful those, too. what want take large image (what linked background-image #ysypic , #tabpic divs) , display thumbnail version of image in confines of divs have set it. is, using background properties have laid out in css, portion of image displays inside of circular divs. without these properties, display defaults smaller section of image [presumably pi*(50^2) area in top left] terrible resolution. i not care if entire image doesn't display inside of circles (it won't, given difference in shape), , overflow not being displayed fine. want able see figu
Read more

java - IntelliJ - No such instance method -

using intellij's 12 ultimate, i'm running following code in debugger: java import play.api.libs.json.jsvalue; public class foo { ... public jsvalue tojson() { ... } public class fooexample { ... foo foo = new foo(); system.out.println("...); //<-- breakpoint at breakpoint, right-clicked source code , picked "evaluate expression," typing in: foo.tojson() . but following error showed up: no such instance method: play.api.libs.json.jsvalue$class.com.foo.foo.tojson () am doing wrong? foo#tojson calls scala code, if matters. edit had breakpoint after instantiation of foo. downvoted it, deserved it. edit my answer no longer valid after op modified question (i.e. moved breakpoint actual is).. a breakpoint hit before line executed. in case foo has not yet been declared or instantiated (i.e. foo constructor has not yet been called). you'll need put breakpoint @ next line (or step on current line) if want evaluate foo .
Read more

identifier - Is it possible for an html5 document to have two ids? -

i wondering if html5 element can have 2 ids, this: <button id="thing1" id="thing2" name="button1" onclick="change()">click here</button> or this: <button id="thing1, thing2" name="button1" onclick="change()">click here</button> also, if 1 of ids said 1 thing, , other id said thing, 1 used? tl;dr : no. in versions of html, each element can have 1 id. see the spec : the id attribute specifies element's unique identifier (id). [dom] the value must unique amongst ids in element's home subtree , must contain @ least 1 character. the value must not contain space characters. note: there no other restrictions on form id can take; in particular, ids can consist of digits, start digit, start underscore, consist of punctuation , etc. note: element's unique identifier can used variety of purposes, notably way link specific parts of document usin
Read more