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Example

// Create geometry for a box, and two instances that refer to it.
// One instance positions the box on the bottom and colored aqua.
// The other instance positions the box on the top and color white.
var geometry = bmgl.BoxGeometry.fromDimensions({
  vertexFormat : bmgl.VertexFormat.POSITION_AND_NORMAL,
  dimensions : new bmgl.Cartesian3(1000000.0, 1000000.0, 500000.0)
});
var instanceBottom = new bmgl.GeometryInstance({
  geometry : geometry,
  modelMatrix : bmgl.Matrix4.multiplyByTranslation(bmgl.Transforms.eastNorthUpToFixedFrame(
    bmgl.Cartesian3.fromDegrees(-75.59777, 40.03883)), new bmgl.Cartesian3(0.0, 0.0, 1000000.0), new bmgl.Matrix4()),
  attributes : {
    color : bmgl.ColorGeometryInstanceAttribute.fromColor(bmgl.Color.AQUA)
  },
  id : 'bottom'
});
var instanceTop = new bmgl.GeometryInstance({
  geometry : geometry,
  modelMatrix : bmgl.Matrix4.multiplyByTranslation(bmgl.Transforms.eastNorthUpToFixedFrame(
    bmgl.Cartesian3.fromDegrees(-75.59777, 40.03883)), new bmgl.Cartesian3(0.0, 0.0, 3000000.0), new bmgl.Matrix4()),
  attributes : {
    color : bmgl.ColorGeometryInstanceAttribute.fromColor(bmgl.Color.AQUA)
  },
  id : 'top'
});