CODEWITHSUNDEEP
javascriptanimationraphael
Niels Bosma
Niels Bosma

Reputation: 11498

RaphaelJs: How to animate a path after translate

I'm trying to animatate a spinning star icon:

var star = this._paper.path("M26.522,12.293l-5.024-0.73c-1.089-0.158-2.378-1.095-2.864-2.081l-2.249-4.554c-0.487-0.986-1.284-0.986-1.771,0l-2.247,4.554c-0.487,0.986-1.776,1.923-2.864,2.081l-5.026,0.73c-1.088,0.158-1.334,0.916-0.547,1.684l3.637,3.544c0.788,0.769,1.28,2.283,1.094,3.368l-0.858,5.004c-0.186,1.085,0.458,1.553,1.432,1.041l4.495-2.363c0.974-0.512,2.566-0.512,3.541,0l4.495,2.363c0.974,0.512,1.618,0.044,1.433-1.041l-0.859-5.004c-0.186-1.085,0.307-2.6,1.095-3.368l3.636-3.544C27.857,13.209,27.611,12.452,26.522,12.293zM22.037,16.089c-1.266,1.232-1.966,3.394-1.67,5.137l0.514,2.984l-2.679-1.409c-0.757-0.396-1.715-0.612-2.702-0.612s-1.945,0.216-2.7,0.61l-2.679,1.409l0.511-2.982c0.297-1.743-0.404-3.905-1.671-5.137l-2.166-2.112l2.995-0.435c1.754-0.255,3.592-1.591,4.373-3.175L15.5,7.652l1.342,2.716c0.781,1.583,2.617,2.92,4.369,3.173l2.992,0.435L22.037,16.089z")
.attr({ fill: "darkred", stroke: "none" })
.transform("t"+starX+","+starY);

var a0 = Raphael.animation({ transform: "r360"}, 2000);
star.animate(a0.repeat(Infinity));

If I remove the translate I get a nice animation. But with the translate the animation is weird.

Upvotes: 1

Views: 1069

Answers (2)

Qnan
Qnan

Reputation: 3744

The parameters for the animation should include the translation as well, since they are the end attributes of the object, not just the difference between the start and the end ones. See the example: http://jsfiddle.net/b9akz/32/.

var paper = new Raphael('holder');
var starX = 100, starY = 100;
var star = paper.path("M26.522,12.293l-5.024-0.73c-1.089-0.158-2.378-1.095-2.864-2.081l-2.249-4.554c-0.487-0.986-1.284-0.986-1.771,0l-2.247,4.554c-0.487,0.986-1.776,1.923-2.864,2.081l-5.026,0.73c-1.088,0.158-1.334,0.916-0.547,1.684l3.637,3.544c0.788,0.769,1.28,2.283,1.094,3.368l-0.858,5.004c-0.186,1.085,0.458,1.553,1.432,1.041l4.495-2.363c0.974-0.512,2.566-0.512,3.541,0l4.495,2.363c0.974,0.512,1.618,0.044,1.433-1.041l-0.859-5.004c-0.186-1.085,0.307-2.6,1.095-3.368l3.636-3.544C27.857,13.209,27.611,12.452,26.522,12.293zM22.037,16.089c-1.266,1.232-1.966,3.394-1.67,5.137l0.514,2.984l-2.679-1.409c-0.757-0.396-1.715-0.612-2.702-0.612s-1.945,0.216-2.7,0.61l-2.679,1.409l0.511-2.982c0.297-1.743-0.404-3.905-1.671-5.137l-2.166-2.112l2.995-0.435c1.754-0.255,3.592-1.591,4.373-3.175L15.5,7.652l1.342,2.716c0.781,1.583,2.617,2.92,4.369,3.173l2.992,0.435L22.037,16.089z")
.attr({ fill: "darkred", stroke: "none" })
.translate(starX,starY);

var a0 = Raphael.animation({ transform: "t"+starX + "," + starY + " r360"}, 2000);
star.animate(a0.repeat(Infinity));​

Upvotes: 1

Neil
Neil

Reputation: 8111

You need to factor in the translation in the animate as follows:

var paper = Raphael(0,0,500,500);
var starX = 50;
var starY = 50;

// code for your path here as its rather long! Including your translate 
// using the starX and starY


// then the animation
var a0 = Raphael.animation({ transform: "t"+starX+","+starY+"r360"}, 2000);
star.animate(a0.repeat(Infinity));​

I also made a jsfiddle example here for you to see.

Upvotes: 1

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