I'm sure this has nothing to do with dynamics.js (which is great btw). I've found that when rotating an svg, if the rotation is a multiple of 360 it won't rotate at all. In some cases, when the rotation is say 270 degrees, the rotation will actually happen in reverse. I'm thinking svgs have some funky polar coordinates , but I haven't found any documentation explaining the issue.

I've gotten around the issue by using css transforms, although I'm not sure this is ideal.

I've illustrated the behavior here:
http://codepen.io/ipetepete/pen/doZqxK

I just wanted to report my findings for others. If anybody knows how to make svg rotation transforms work properly, I'd love to hear how.

Is possible Applying bezier easing with SVG Path Data Bezier?

User paste SVG Path data and easing can change, i trying and it works at all, but no accurate.

Like https://greensock.com/customease this.

Hello,

I'm just playing around with your nice library...
very cool!

but is it somehow possible to rotate arround the x axis?

rotateX has no effect.

For example Android 4.4 doesn't supports document.visibilityState without the webkit prefix, creating an animation with a delay will never be triggered on these devices because isDocumentVisible will not return false.
Is it an idea to check for 'visibilityState' in document and then return the document visibility or true for older browsers?

Can't seem to get this to work properly, seem to be doing everything right from what I can see in the docs.

Uncaught TypeError: Cannot read property 'length' of undefined
    at t.interpolate (dynamics.min.js:1)
    at t.interpolate (dynamics.min.js:1)
    at q (dynamics.min.js:1)
    at m (dynamics.min.js:1)
    at P (dynamics.min.js:1)

var block = $('.feature-block');
var path = $('#feature-path');
block.data('dragging', false);
block.data('c', { x: 100, y: 10 });
block.data('start', { x: 0, y: 0 });

function update() {
    var dy = block.data('c').y - 10;
    var dampen = dy > 0 ? 2 : 4;

    block.css('transform', 'translate3d(0,' + dy / dampen + 'px,0)');
    path.attr('d', 'M0,100 L100,100 L100,10 ' + 'Q' + block.data('c').x + ',' + block.data('c').y + ' 0,10');
}
update();

block.on('mousedown', function(e) {
    e = e.changedTouches ? e.changedTouches[0] : e;
    var $this = $(this);
    $this.data('dragging', true);
    $this.data('start').x = e.pageX;
    $this.data('start').y = e.pageY;
});

$(document).on('mousemove', function(e) {
    e = e.changedTouches ? e.changedTouches[0] : e
    if (block.data('dragging') && ((e.pageY - block.position().top > -200 && e.pageY - block.position().top <= 0) || (e.pageY - block.position().top < 250 && e.pageY - block.position().top >= 0))) {
      block.data('c').x = (50 + (e.pageX - block.data('start').x)/block.width())
      // dampen vertical drag by a factor
      var dy = e.pageY - block.data('start').y
      var dampen = dy > 0 ? 20 : 20
      block.data('c').y = 10 + dy / dampen
      update();
    }
});

$(document).on('mouseup', function(e) {
    if (block.data('dragging')) {
      block.data('dragging', false);
      dynamics.animate(path, {
        x: 100,
        y: 100
      }, {
        type: dynamics.spring,
        duration: 700,
        friction: 280,
        change: update
      })
    }
});

Hi Michael,

Is it possible? Yes it is, see below.

Unless I missed the part in the docs that mentions how to interpolate custom props or how to handle filters.

Hi @michaelvillar
I used matrix compose/decompose from you dynamics.js, and my tweening engine is another type. All works fine, including IE9, also gets all current style back to IE9!
But in all browser rotateZ doesn't work properly, i seen in your demo site all works fine, please help.

• I will keep dynamics.js link in tweening engine my source used list

Sorry for my english

Hello, need simple example. Example: change background color. Thank you.

I try to use css percent value and the result is bad. The animate func try to animate to the value, if you put 50% on a width for example, it will translate to 50px and in the end of animation set 50%. Strange result

something like this

var fakeSvgObj = {
    d: "...",
    fill: "....",
    _objectType: "SVG"
}

dynamics.animate(fakeSvgObj, {
    d: "M0,0 L0,100 L100,50 L0,0 Z",
    fill: "#FF0000",
    rotateZ: 45,
    // rotateCX and rotateCY are the center of the rotation
    rotateCX: 100,
    rotateCY: 100
}, {
    friction: 800
})

then it will try the object like a svg. ( is this possible?)

why? it will integrate nicely with the vdom libraries out there, like reactjs and mercury, etc. and let the dom changes to these library instead of be done by dynamics.js itself.

because currently the library is supported in browsers where is possible create objects with with getter and setter functions, will be easy to communicate the changes to mercuryjs for example and fire the re-render functionality. without conflict with the library.

Since your github page michaelvillar.github.io is not reachable, so is dynamics.js ones.

I've been writing some tests and got some error occured in karma test Chrome environment.

var $elem = document.querySelector('.message');
dynamics.animate($elem, {
    scale: 1.5
  }, {
    type: dynamics.bounce,
    frequency: 450,
    friction: 200,
    duration: 1000
})

Will raise following error in karma Chrome:

Uncaught TypeError: Cannot read property '0' of undefined
    DecomposedMatrix.interpolate @ index.js:17591
    __bind @ index.js:16817
    interpolate @ index.js:18198
    animationTick @ index.js:18181
    runLoopTick @ index.js:18149

It fails on the following line src/dynamics.coffee#L495

decomposed[k][i] = (decomposedB[k][i] - decomposedA[k][i]) * t + decomposedA[k][i];

I've dived into code and find that it's because decomposedB.transform is false, so decomposedB['transform'][0] cannot be evaulated.

The decomposedB is set to false in startAnimation with following line:

endProperties['transform'] = matrix.decompose(); 

matrix is created with

matrix = Matrix.fromTransform(Matrix.matrixForTransform(v));

v is "scaleX(1.5) scaleY(1.5) scaleZ(1.5)"

And later matrix.decompose() returns false because of this statement:

if (els[3][3] === 0) {
  return false;
}

So if this is normal, then problem with some if statement in for cycle:

if !only? or only.indexOf(k) > -1 or only.indexOf("#{k}#{['x','y','z'][i]}") > -1

In original non karma environment everything works fine, but few conditions is not the same.

I tried using this code. It seems to be working well on safari but triggers an error on chrome and the other browers. Is there an extra set up needed?

var dots = document.querySelectorAll('.dot')
var colors = ['#007EFF', '#FF3700', '#92FF00']

// Start the 3 dot animations with different delays
function animateDots() {
for(var i=0; i<dots.length; i++) {
dynamics.animate(dots[i], {
translateY: -70,
backgroundColor: colors[i]
}, {
type: dynamics.forceWithGravity,
bounciness: 800,
elasticity: 200,
duration: 2000,
delay: i * 450
})
}

dynamics.setTimeout(animateDots, 2500)
}

animateDots()

I'm trying to use dynamics.js and in my example i'm using it with hammer.js.

Everything works so far, but the complete-callback fires when animate starts, not when it ends.

I have the example on codepen
Codpenexample

Do i do something wrong or is it a bug?

Unfortunatly, it seems like Dynamics.js's website is down.
:( I was looking for demos - any alternative?

As currently we can use spring/gravity for bounceOut or elasticOut, but can we do bounceIn or bounceOut, also InOut would be interesting as well.

Hello there,

First of all i would like to express my gratitude for this amazing library, also I'm a big fan of your work.

I was playing around with dynamics.js for the first time and noticed that my code does not work on chrome, but does on firefox, the code that throws the error is the following:

dynamics.animate(el, {
      background: "red"
});

the error is the following:

Uncaught TypeError: Cannot read property 'rgb' of undefined
    at e.interpolate (dynamics.min.js:1)
    at e.interpolate (dynamics.min.js:1)
    at t.interpolate (dynamics.min.js:1)
    at t.interpolate (dynamics.min.js:1)
    at q (dynamics.min.js:1)
    at m (dynamics.min.js:1)
    at P (dynamics.min.js:1)

I'm Not sure if it's something that I'm doing wrong, if yes then i can't figure it out.

Not a real code issue, but dynamicsjs.com.is down :(

I'm animating a div block to the center of the screen. I've calculate the amount of pixels it should move to the left with translateX. It works. But, when the next animation on that element begins, it snaps back to its original position. The translateX is overwritten or something when 'fade card out' begins, it doesn't stay center screen.

// animate to center
        dynamics.animate(activeCard, {
            translateX: animateCards
        }, {
            type: dynamics.spring,
            friction: 400,
            duration: 1300,
            delay: 600
        });

        // fade card out
        dynamics.animate(activeCard, {
            scale: 1.2,
            opacity: 0
        }, {
            type: dynamics.spring,
            friction: 400,
            duration: 1300,
            delay: 1200
        });

How can I fix the position of this element after i've animated it?

Calling dynamics.stop() doesn't work for certain animation types.

Demonstration:

http://codepen.io/anon/pen/GpzoYV

http://dynamicsjs.com/

Hi Michael,
I liked so much dynamics.js and i've been playing around with it for a while.

I have been trying to implement an integration with React and I think I found a pretty easy and smart way to do it.

You should really check this out from my gist!

This could be the next Famo.us ;)

React and Dynamics integration concept

This will help people a lot because many use bower to handle frontend plugins.

Hello Michael,

I've run into an issue using Dynamics.js in React component's with strict mode and ES6 classes. Using methods such as spring which use arguments.callee.defaults throw TypeErrors's. To solve this, I change the arguments.callee to the following format(dynamics.methodName.defaults) in order to avoid errors in my project. Is this something you would be interested in changing or having a pull request for?

Error Message:
Uncaught TypeError: 'caller', 'callee', and 'arguments' properties may not be accessed on strict mode functions or the arguments objects for calls to them

Example Solution for 'spring' method:
applyDefaults(options, arguments.callee.defaults);
now
applyDefaults(options, dynamics.spring.defaults);

Source:
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions/arguments/callee

I have the following code:

which, should, in theory, animate the zoom property on the Camera object to the specified value. However, the behavior I'm seeing is very strange where only the first few frames animate and then it spends the rest of the duration setting the value to the end value:

This seems like a bug, but if perhaps I'm doing this incorrectly, please let me know.

some advices:
1: add samples to repo not just on website page
2: add some tests to codepen
3: integrate with angularjs/reactjs or any popular FE projects.

There could be an attribute to define the position of early x or y.

What do you think?

Thank you.

Open this example
http://dynamicsjs.com/examples/pin.html

And leave it for ~10 minutes.
In my case (Chrome, Windows, DevTools open) the svg slowly grows bigger than the .pin.
Maybe that's because the previous transform3d is not identity matrix when the new transform3d is applied.

Seems like transition doesn't continue if the tab becomes inactive. I suppose this is the browser thing, but is there a way to get around this?