Added comments

src/layer/geometry/PointLayer.js

@@ -14,6 +14,14 @@
 
 // TODO: Provide option to billboard geometry so it always faces the camera
 
+// TODO: Support dynamic updating / hiding / animation of geometry
+//
+// This could be pretty hard as it's all packed away within BufferGeometry and
+// may even be merged by another layer (eg. GeoJSONLayer)
+//
+// How much control should this layer support? Perhaps a different or custom
+// layer would be better suited for animation, for example.
+
 import Layer from '../Layer';
 import extend from 'lodash.assign';
 import THREE from 'three';

src/layer/geometry/PolygonLayer.js

@@ -3,6 +3,14 @@
 // TODO: Look at ways to drop unneeded references to array buffers, etc to
 // reduce memory footprint
 
+// TODO: Support dynamic updating / hiding / animation of geometry
+//
+// This could be pretty hard as it's all packed away within BufferGeometry and
+// may even be merged by another layer (eg. GeoJSONLayer)
+//
+// How much control should this layer support? Perhaps a different or custom
+// layer would be better suited for animation, for example.
+
 import Layer from '../Layer';
 import extend from 'lodash.assign';
 import THREE from 'three';

src/layer/geometry/PolylineLayer.js

@@ -5,6 +5,14 @@
 
 // TODO: Provide alternative output using tubes and splines / curves
 
+// TODO: Support dynamic updating / hiding / animation of geometry
+//
+// This could be pretty hard as it's all packed away within BufferGeometry and
+// may even be merged by another layer (eg. GeoJSONLayer)
+//
+// How much control should this layer support? Perhaps a different or custom
+// layer would be better suited for animation, for example.
+
 import Layer from '../Layer';
 import extend from 'lodash.assign';
 import THREE from 'three';