Raphael Papier-zoom-animation

Für jemand (wie mich), die wollte den Zoom & panning geschmeidig animiert, einen Blick hier haben:

https://groups.google.com/forum/?fromgroups#!Thema/raphaeljs/7eA9xq4enDo

dieser Schnitt hat mir geholfen, zu automatisieren und zu animieren, Zoomen und schwenken, um einen bestimmten Punkt auf der Leinwand. (Requisiten, um Wird Morgan)

Raphael.fn.animateViewBox = function(currentViewBox, viewX, viewY, width, height, duration, callback) {

    duration = duration || 250;

    var originals = currentViewBox, //current viewBox Data from where the animation should start
        differences = {
                x: viewX - originals.x,
                y: viewY - originals.y,
                width: width - originals.width,
                height: height - originals.height
        },
        delay = 13,
        stepsNum = Math.ceil(duration / delay),
        stepped = {
                x: differences.x / stepsNum,
                y: differences.y / stepsNum,
                width: differences.width / stepsNum,
                height: differences.height / stepsNum
        }, i,
        canvas = this;

    /**
     * Using a lambda to protect a variable with its own scope.
     * Otherwise, the variable would be incremented inside the loop, but its
     * final value would be read at run time in the future.
     */
    function timerFn(iterator) {
            return function() {
                    canvas.setViewBox(
                            originals.x + (stepped.x * iterator),
                            originals.y + (stepped.y * iterator),
                            originals.width + (stepped.width * iterator),
                            originals.height + (stepped.height * iterator)
                    );
                    //Run the callback as soon as possible, in sync with the last step
                    if(iterator == stepsNum && callback) {
                            callback(viewX, viewY, width, height);
                    }
            }
    }

    //Schedule each animation step in to the future
    //Todo: use some nice easing
    for(i = 1; i <= stepsNum; ++i) {
            setTimeout(timerFn(i), i * delay);
    }

} 

Ähnlich wie oben, aber mit unterschieden:

• Hängt nicht von Internas (was sich inzwischen geändert haben)
• Erfordert keine globalen eingerichtet (es ist für Sie verarbeitet)
• RequestAnimationFrame verwendet, was viel flüssigere Animationen (aber funktioniert nicht im IE9 oder unten)
• Verwendet Raphael easing-Funktionen (linear, easeIn, easeOut, easeInOut, backIn, backOut, elastic, bounce)

Da dies eine komplette Neuentwicklung, die ich nicht ändern die oben genannten.

 Raphael.fn.animateViewBox = function(viewX, viewY, width, height, duration, callback, easing) {
    var start = window.performance.now(),
      canvas = this;

    easing = Raphael.easing_formulas[ easing || 'linear' ];
    duration = duration === undefined ? 250 : duration;

    if (canvas.currentViewBox == undefined) {
        canvas.currentViewBox = {
            x: 0,
            y: 0,
            width: this._viewBox ? this._viewBox[2] : canvas.width,
            height: this._viewBox ? this._viewBox[3] : canvas.height 
        }
    }

    function step(timestamp) {
        var progress = timestamp - start;
        var progressFraction = progress/duration;

        if (progressFraction > 1) {
            progressFraction = 1;
        }

        var easedProgress = easing( progressFraction );
        var newViewBox = {
            x: canvas.currentViewBox.x + (viewX - canvas.currentViewBox.x) * easedProgress,
            y: canvas.currentViewBox.y + (viewY - canvas.currentViewBox.y) * easedProgress,
            width: canvas.currentViewBox.width + (width - canvas.currentViewBox.width) * easedProgress,
            height: canvas.currentViewBox.height + (height - canvas.currentViewBox.height) * easedProgress
        };
        canvas.setViewBox(newViewBox.x, newViewBox.y, newViewBox.width, newViewBox.height, false);

        if (progressFraction < 1) {
            window.requestAnimationFrame(step);
        } else {
            canvas.currentViewBox = newViewBox;
            if (callback) {
                callback(newViewBox.x, newViewBox.y, newViewBox.width, newViewBox.height);
            }
        }
    }
    window.requestAnimationFrame(step);
}