getGeometryInstanceAttributes is not a function - Error

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Sep 25, 2018, 8:33:38 AM9/25/18
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Hi everyone,

I have an issue with using "getGeometryInstanceAttributes".
When I try to use getGeometryInstanceAttributes, I get an error that "getGeometryInstanceAttributes is not a function "
This a part of the code:

var load = function(viewer, callback) {
var cubes;
req.onload = function(evt) {
    that.primitive =  new Cesium.PrimitiveCollection({show:true, destroyPrimitives:true});
     callback(viewer,  that.primitive , this.number_cube);


 function callBackFunc (viewer, myPrimitive, cubes) {
var i = 0;
       var color = myPrimitive.getGeometryInstanceAttributes(i).color; //  ERROR: myPrimitive.getGeometryInstanceAttributes is not a function
        color[3] = (Math.cos(counter) * 0.5 + 0.5) * 255;
        myPrimitive.getGeometryInstanceAttributes(i).color = color;

I really appreciate your help.

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Omar Shehata

Sep 25, 2018, 9:10:39 AM9/25/18
to cesium-dev
Hey Maryam, 

Notice that a PrimitiveCollection ( is not the same as a Primitive ( A Primitive has a method `getGeometryInstanceAttributes` while PrimitiveCollection does not.

When you add a primitive, it returns the primitive that was added (see So you should call getGeometryInstanceAttributes on that instead.

Does that make sense?
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