javascript - Keeping shape and animation of ball consistance over period of time -

-

i new two.js. trying basic experiments rubber ball example reposition ball on every second per random input instead of mouse movement.

so, have written below code, removing rubber ball effect after iteration. don't know going wrong.

second problem, after iteration, rubber ball changing shape circle oval kind of shape.

jsfiddle: http://jsfiddle.net/2v93n/ tried many times, not working live jsfiddle.

<body> <script>       var 2 = new two({         fullscreen: true,         autostart: true       }).appendto(document.body);        two.resoultion = 32;        var delta = new two.vector();       var mouse = new two.vector();       var drag = 0.1;       var radius = 25;       var shadow = two.makecircle(two.width / 2, two.height / 2, radius);       var ball = two.makecircle(two.width / 2, two.height / 2, radius);       ball.nostroke().fill = 'green';shadow.nostroke().fill = 'rgba(0, 0, 0, 0.2)';          shadow.scale = 0.85;      function moverubberball() {        shadow.offset = new two.vector(- radius / 2, radius * 2);        _.each(ball.vertices, function(v) {         v.origin = new two.vector().copy(v);       });        mouse.x = math.floor((math.random() * 1000) + 1);       mouse.y = math.floor((math.random() * 600) + 1);       shadow.offset.x = 5 * radius * (mouse.x - two.width / 2) / two.width;       shadow.offset.y = 5 * radius * (mouse.y - two.height / 2) / two.height;        two.bind('update', function() {          delta.copy(mouse).subself(ball.translation);          _.each(ball.vertices, function(v, i) {            var dist = v.origin.distanceto(delta);           var pct = dist / radius;            var x = delta.x * pct;           var y = delta.y * pct;            var destx = v.origin.x - x;           var desty = v.origin.y - y;            v.x += (destx - v.x) * drag;           v.y += (desty - v.y) * drag;            shadow.vertices[i].copy(v);          });         ball.translation.addself(delta);         shadow.translation.copy(ball.translation);         shadow.translation.addself(shadow.offset);        });   }   var auto_refresh = setinterval("moverubberball()", 1000); </script> </body>

please somebody.

the main issue two.bind('update'...) within moverubberball(). when bind update means function called on requestanimationframe, 60fps. when event bound every time moverubberball called — once second — adds another callback. after 5 seconds there 5 updates called 60fps. updated fiddle import two.js correctly , fix error outlined:

http://jsfiddle.net/2v93n/1/


Comments

Post a Comment

Popular posts from this blog

c++ - OpenCV Error: Assertion failed <scn == 3 ::scn == 4> in unknown function, -

-
i read alot other solution still confused should mine... #include <opencv2/objdetect/objdetect.hpp> #include <opencv2/highgui/highgui.hpp> #include <opencv2/imgproc/imgproc.hpp> #include <iostream> #include <stdio.h> using namespace std; using namespace cv; int main(int argc, const char** argv) { //create cascade classifier object used face detection cascadeclassifier face_cascade; //use haarcascade_frontalface_alt.xml library face_cascade.load("haarcascade_frontalface_alt.xml"); //setup video capture device , link first capture device videocapture capturedevice; capturedevice.open(0); //setup image files used in capture process mat captureframe; mat grayscaleframe; //create window present results namedwindow("outputcapture", 1); //create loop capture , find faces while (true) { //capture new image frame capturedevice >> captureframe; ...
Read more

php - render data via PDO::FETCH_FUNC vs loop -

-
i've been using 2 methods render data. the first one: function name($id,$name){ return '<div id="'.$id.'">'.$name.'</div>'; } echo implode($pdo->query("select id,name user")->fetchall(pdo::fetch_func,'name')); the second one: $users = $pdo->query("select id,name user")->fetchall(pdo::fetch_obj); foreach($users $user){ echo name($user->id,$user->name); } i don't understand how pdo::fetch_func works. tried figure out. however, not well-documented. could please explain fetch mode? , also, 1 performs better? thank you. both methods wrong , have learn how use templates , how separate business logic presentation logic. $users = $pdo->query("select id,name user")->fetchall(pdo::fetch_obj); tpl::assign('users', $users); is code business logic part. then in template <?php foreach $users $row): ?> <div id="<?=$...
Read more

The canvas has been tainted by cross-origin data in chrome only -

-
uncaught securityerror: failed execute 'getimagedata' on 'canvasrenderingcontext2d': canvas has been tainted cross-origin data i getting above error in chrome. code(following) works fine in mozilla. have not corss domain issue. why above error in chrome? var wheel_canvas, wheel_context, can_w, can_h, wheel_grd; var large_radius = 160; var small_radius = 120; var wheel_canvas = document.getelementbyid('wheel_canvas'); var wheel_context = wheel_canvas.getcontext('2d'); var can_w = $(wheel_canvas).width(); var can_h = $(wheel_canvas).height(); var centerx = can_w / 2, centery = can_h / 2; var wheel_grd = null; test('#ff0000'); function test(hex) { $('#clrpicker').css({'left': 210, 'top': 210 }); inverted = hexbw(hex); $('#color_val_show').val(hex); current_color_hex_val_selected = hex; $('#color_val_show').css({'color':inverted,'background':hex}); fillgradient...
Read more