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Example

// A solid white line segment
var primitive = new bmgl.Primitive({
  geometryInstances : new bmgl.GeometryInstance({
    geometry : new bmgl.SimplePolylineGeometry({
      positions : bmgl.Cartesian3.fromDegreesArray([
        0.0, 0.0,
        5.0, 0.0
      ])
    }),
    attributes : {
      color : bmgl.ColorGeometryInstanceAttribute.fromColor(new bmgl.Color(1.0, 1.0, 1.0, 1.0))
    }
  }),
  appearance : new bmgl.PerInstanceColorAppearance({
    flat : true,
    translucent : false
  })
});

// Two rectangles in a primitive, each with a different color
var instance = new bmgl.GeometryInstance({
  geometry : new bmgl.RectangleGeometry({
    rectangle : bmgl.Rectangle.fromDegrees(0.0, 20.0, 10.0, 30.0)
  }),
  attributes : {
    color : new bmgl.ColorGeometryInstanceAttribute(1.0, 0.0, 0.0, 0.5)
  }
});

var anotherInstance = new bmgl.GeometryInstance({
  geometry : new bmgl.RectangleGeometry({
    rectangle : bmgl.Rectangle.fromDegrees(0.0, 40.0, 10.0, 50.0)
  }),
  attributes : {
    color : new bmgl.ColorGeometryInstanceAttribute(0.0, 0.0, 1.0, 0.5)
  }
});

var rectanglePrimitive = new bmgl.Primitive({
  geometryInstances : [instance, anotherInstance],
  appearance : new bmgl.PerInstanceColorAppearance()
});