Question

I’m currently trying to adapt some sample code and have hit a snag when trying to replace hardcoded coordinates with a variable.

The following sample code works:

TweenMax.to(sp,
         5,
         {bezierThrough:[{x:250,y:100},{x:50,y:200},{x:500,y:200}],
         onUpdate:drawme,
              onUpdateParams:[sp]});

But when I try to replace the bezier points with a variable, I get a runtime error saying property 0 of Shape doesn’t exist. sp is of type Shape. (Full error below).

 var centralLinePoints:Array = new Array();
  for (var i:int = 0; i < data.nodes.length; i++)
  {
      var foo:Object = data.nodes[i].data.abc;
      var bar:Number = data.nodes[i].data.def;
      if (foo != null)
      {
          centralLinePoints.push({x: bar, y: foo});
      }
   }

  TweenMax.to(sp,
5,
{bezierThrough:[centralLinePoints],
onUpdate:drawme,
onUpdateParams:[sp]});

I’ve found this documentation: http://www.greensock.com/as/docs/tween/com/greensock/plugins/BezierThroughPlugin.html but I’m not sure what type is implied.

Full error:

ReferenceError: Error #1069: Property 0 not found on flash.display.Shape and there is no default value.
at com.greensock.plugins::BezierPlugin/init()[C:[…]\greensock-as3\com\greensock\plugins\BezierPlugin.as:99]
at com.greensock.plugins::BezierThroughPlugin/onInitTween()[C:[…]\greensock-as3\com\greensock\plugins\BezierThroughPlugin.as:68]

[sorry about the formatting]

Answer 1

As the third param to TweenMax.to you pass an object with 3 properties. The first is the Array of objects having x and y as properties.

Try to remove the square parenthesis:

TweenMax.to(
    sp,
    5,
    { 
        bezierThrough:centralLinePoints,
        onUpdate:drawme,
        onUpdateParams:[sp]
    }
);