Start implementation of point cloud layer

.gitignore

@@ -5,6 +5,7 @@ docs_build/
 *.zip
 *.feather
 *.parquet
+*.code-workspace
 
 *.yarn
 

src/point-cloud-layer.ts

@@ -0,0 +1,96 @@
+import {
+    CompositeLayer,
+    CompositeLayerProps,
+    DefaultProps,
+    GetPickingInfoParams,
+    Layer,
+    LayersList,
+    assert,
+  } from "@deck.gl/core/typed";
+import { PointCloudLayer } from "@deck.gl/layers/typed";
+import type { PointCloudLayerProps } from "@deck.gl/layers/typed";
+import * as arrow from "apache-arrow"
+import * as ga from "@geoarrow/geoarrow-js"
+import {
+    assignAccessor,
+    extractAccessorsFromProps,
+    getGeometryVector,
+    invertOffsets,
+} from "./utils.js"
+// TODO which accessors are actually needed for a pointcloud layer
+import {
+    GeoArrowExtraPickingProps,
+    computeChunkOffsets,
+    getPickingInfo,
+} from "./picking.js"
+import { ColorAccessor, FloatAccessor, GeoArrowPickingInfo } from "./types.js";
+import { EXTENSION_NAME } from "./constants.js";
+import { validateAccessors } from "./validate.js";
+import { defaultPoolSize } from "threads/dist/master/implementation.browser.js";
+import { defaultProps } from "./path-layer.js";
+
+/* All properties supported by GeoArrowPointCloudLayer */
+export type GeoArrowPointCloudLayerProps = Omit<
+    PointCloudLayerProps<arrow.Table>, // TODO is this still an Arrow Table or is it another datatype? An arrow table is a vector/array like value so is it the same?
+    | "omitted properties here"
+    > &
+    _GeoArrowPointCloudLayerProps &
+    CompositeLayerProps;
+
+// TODO # see line of getSizeUnits
+export type Unit = 'meters' | 'common' | 'pixels';
+
+/* All properties added by GeoArrowPointCloudLayer */
+type _GeoArrowPointCloudLayerProps = {
+    // data
+    data: arrow.Table,
+
+    /**
+     * If `true`, validate the arrays provided (e.g. chunk lengths)
+     * @default true
+     */
+    _validate?: boolean;
+    /**
+     * 
+     * The units of the point size, one of `'meters'`, `'common'`, and `'pixels'`.
+     * @default 'pixels'
+     */
+    getSizeUnits?: Unit; // TODO do we need a unit type here?
+    /** 
+    * Center position accessor.
+    * If not provided, will be inferred by finding a column with extension type
+    * `"geoarrow.point"` or `"geoarrow.multipoint"`.
+    */
+    getPosition?: ga.vector.PointVector | ga.vector.MultiPointVector;
+
+
+    //getProperties here
+}
+
+export class GeoArrowPointCloudLayer<
+    ExtraProps extends {} = {},
+    > extends CompositeLayer<Required<GeoArrowPointCloudLayerProps> & ExtraProps>{
+        static defaultProps = defaultProps
+        static layerName = "GeoArrowPointCloudLayer"
+
+        // picking info method
+
+
+        // render layers methods, determine geometry types
+
+        // renderlayerpoints method, determine point types
+
+        // accessors logic
+
+
+        /// props
+
+        /// assign accessor(s)
+
+
+        // render multipoint layers
+
+        // final logic
+
+        // return
+    }

src/types.ts

@@ -12,3 +12,4 @@ export type TimestampAccessor = arrow.Vector<arrow.List<arrow.Float>>;
 export type ColorAccessor =
   | arrow.Vector<arrow.FixedSizeList<arrow.Uint8>>
   | Accessor<arrow.Table, Color | Color[]>;
+export type NormalAccessor = arrow.Vector<arrow.FixedSizeList<arrow.Float32>>