ZCanvas

Mark:ZCanvas is a canvas class used for rendering shapes into canvas in a trail.We always need to use `requestAnimationFrame` to create a animation for canvas doms.And ZCanvas helps you to complete the animation easier. 

Simple Use
If you want to create a rect shape and make it move to one point in a linear way , you can achieve it by follow steps.

• Create the a canvas in HTML
  We should know that ZCanvas is related to canvas dom . So we must create a canvas node in HTML first.

    <canvas id="board" width="500" height="500"></canvas>

• Create a instance of ZCanvas
  We should get the canvas node as a param and new an instance of ZCanvas.

    var board = document.getElementById("board");
    var zcanvas = new ZCanvas(board);

• Create a rect shape
  In ZCanvas , we can create a rect shape as soon as possible :

    var rect = zcanvas.Rect();

Or you can appiont styles for the rect just as you want :

    var rect = zcanvas.Rect({
        width : 100,
        height :100,
        x : 0,
        y : 0,
        orignX : 0,
        orignY : 0,
        fill : "#000",
        shadow : true,
        shadowBlur : 2,
        shadowColor : "#333",
        shadowOffsetX : 0,
        shadowOffsetY : 0,
        stroke : true,
        strokeStyle : "#666",
        strokeWidth : 2,
        rotate : Math.PI,
        scaleX : 1,
        scaleY : 1,
        opacity : 1
    });

• Add and render the rect node into canvas
  Have created the node , we should add the node into zcanvas and then render it to make it visible . Shape can't be rendered if is was not added .

    zcanvas.addNode(rect);
    zcanvas.renderNode(rect);

And then you will see the rect in the canvas .
However , you can add animations when the node is rendered into the canvas , just as follow code :

    zcanvas.renderNode(rect,{
        type:"linear",
        time:200,
        delay:100
    },{
        width:200,
        height:200,
        x:300,
        y:300
    },function(){
        console.log("Rendering Completed")
    });

(The step time is the same as requestAnimationFrame's step time .) The code means in 100 steps later,the rect node will animate from the added style to the rendered style in 200 steps . And you can give a callback after the animation finished .

• Derender the rect and remove it away
  You can also derender the rect in an animation and remove it after derendered .

    zcanvas.deRenderNode(rect,{
        type:"linear",
        time:200,
        delay:100
    },{
        width:200,
        height:200,
        x:300,
        y:300
    },function(){
        zcanvas.removeNode(rect);
    });

But I guess you may be need to remove the node in the callback of derenderring if you want to perform a animation . Because the node can't be remove if it has not been derenderred from the zcanvas .

Summary:
It's sorry to say that ZCanvas is not all completed yet . But I'll let it completed as soon as possible .