Added Draco support to point clouds

Apps/Sandcastle/gallery/3D Tiles Formats.html

@@ -82,6 +82,9 @@
         }, {
             name: 'PointCloudBatched',
             resource: Cesium.IonResource.fromAssetId(3878)
+        }, {
+            name: 'PointCloudDraco',
+            resource: Cesium.IonResource.fromAssetId(4702)
         }
     ],
     selectedTileset: undefined,

CHANGES.md

@@ -9,12 +9,16 @@ Change Log
 * KML and GeoJSON now use `PolylineGraphics` instead of `CorridorGraphics` for polylines on terrain. [#6706](https://github.com/AnalyticalGraphicsInc/cesium/pull/6706)
 
 ##### Additions :tada:
-* Added support for polylines on terrain [#6689](https://github.com/AnalyticalGraphicsInc/cesium/pull/6689) [#6615](https://github.com/AnalyticalGraphicsInc/cesium/pull/6615)
-  * Use the `clampToGround` option for `PolylineGraphics` (polyline entities).
-  * Requires depth texture support (`WEBGL_depth_texture` or `WEBKIT_WEBGL_depth_texture`), otherwise `clampToGround` will be ignored.  Use `Entity.supportsPolylinesOnTerrain` to check for support.
-  * Added `GroundPolylinePrimitive` and `GroundPolylineGeometry` 
+* Added support for Polylines on Terrain via the `Entity` API [#6689](https://github.com/AnalyticalGraphicsInc/cesium/pull/6689)
+   * Use the `clampToGround` option for `PolylineGraphics`.
+   * Requires depth texture support (`WEBGL_depth_texture` or `WEBKIT_WEBGL_depth_texture`), otherwise `clampToGround` will be ignored.
+   * Added `Entity.supportsPolylinesOnTerrain` for checking if the current platform supports `clampToGround`.
+* Added `GroundPolylinePrimitive` and `GroundPolylineGeometry` for rendering polylines on terrain via the `Primitive` API. [#6615](https://github.com/AnalyticalGraphicsInc/cesium/pull/6615)
+   * Requires depth texture support (`WEBGL_depth_texture` or `WEBKIT_WEBGL_depth_texture`).
+   * Use `GroundPolylinePrimitive.isSupported` to check for support.
 * `PostProcessStage` has a `selected` property which is an array of primitives used for selectively applying a post-process stage. [#6476](https://github.com/AnalyticalGraphicsInc/cesium/pull/6476)
    * The `PostProcessStageLibrary.createBlackAndWhiteStage` and `PostProcessStageLibrary.createSilhouetteStage` have per-feature support.
+* Added support for loading Draco compressed Point Cloud tiles for 2-3x better compression. [#6559](https://github.com/AnalyticalGraphicsInc/cesium/pull/6559)
 * Added CZML support for `zIndex` for `corridor`, `ellipse`, `polygon`, `polyline` and `rectangle`. [#6708](https://github.com/AnalyticalGraphicsInc/cesium/pull/6708)
 * Added CZML `clampToGround` option for `polyline`. [#6706](https://github.com/AnalyticalGraphicsInc/cesium/pull/6706) 
 
@@ -63,8 +67,13 @@ Change Log
    * Added `PostProcessStageLibrary` which contains several built-in stages that can be added to the collection.
    * Added `PostProcessStageComposite` for multi-stage post-processes like depth of field.
    * Added a new Sandcastle label `Post Processing` to showcase the different built-in post-process stages.
- * Added `zIndex` for ground geometry, including corridor, ellipse, polygon and rectangle entities. [#6362](https://github.com/AnalyticalGraphicsInc/cesium/pull/6362)
- * Added `Rectangle.equalsEpsilon` for comparing the equality of two rectangles [#6533](https://github.com/AnalyticalGraphicsInc/cesium/pull/6533)
+* Added `Rectangle.equalsEpsilon` for comparing the equality of two rectangles [#6533](https://github.com/AnalyticalGraphicsInc/cesium/pull/6533)
+* Added `zIndex` for ground geometry, including corridor, ellipse, polygon and rectangle entities. [#6362](https://github.com/AnalyticalGraphicsInc/cesium/pull/6362)
+* Added support for materials on terrain entities (entities with unspecified `height`) and `GroundPrimitives`. [#6393](https://github.com/AnalyticalGraphicsInc/cesium/pull/6393)
+  * Only available for `ClassificationType.TERRAIN` at this time. Adding a material to a terrain `Entity` will cause it to behave as if it is `ClassificationType.TERRAIN`.
+  * Requires depth texture support (`WEBGL_depth_texture` or `WEBKIT_WEBGL_depth_texture`), so materials on terrain entities and `GroundPrimitives` are not supported in Internet Explorer.
+  * Best suited for notational patterns and not intended for precisely mapping textures to terrain - for that use case, use `SingleTileImageryProvider`.
+* Added `GroundPrimitive.supportsMaterials` and `Entity.supportsMaterialsforEntitiesOnTerrain`, both of which can be used to check if materials on terrain entities and `GroundPrimitives` is supported. [#6393](https://github.com/AnalyticalGraphicsInc/cesium/pull/6393)
 
 ##### Fixes :wrench:
 * Fixed a bug causing custom TilingScheme classes to not be able to use a GeographicProjection. [#6524](https://github.com/AnalyticalGraphicsInc/cesium/pull/6524)

Source/Scene/DracoLoader.js

@@ -203,7 +203,7 @@ define([
      * Schedules decoding tasks available this frame.
      * @private
      */
-    DracoLoader.decode = function(model, context) {
+    DracoLoader.decodeModel = function(model, context) {
         if (!DracoLoader.hasExtension(model)) {
             return when.resolve();
         }
@@ -245,6 +245,19 @@ define([
         return when.all(decodingPromises);
     };
 
+    /**
+     * Decodes a compressed point cloud. Returns undefined if the task cannot be scheduled.
+     * @private
+     */
+    DracoLoader.decodePointCloud = function(parameters) {
+        var decoderTaskProcessor = DracoLoader._getDecoderTaskProcessor();
+        if (!DracoLoader._taskProcessorReady) {
+            // The task processor is not ready to schedule tasks
+            return;
+        }
+        return decoderTaskProcessor.scheduleTask(parameters, [parameters.buffer.buffer]);
+    };
+
     /**
      * Caches a models decoded data so it doesn't need to decode more than once.
      * @private

Source/Scene/Model.js

@@ -4281,7 +4281,7 @@ define([
                 }
 
                 if (!loadResources.finishedDecoding()) {
-                    DracoLoader.decode(this, context)
+                    DracoLoader.decodeModel(this, context)
                         .otherwise(getFailedLoadFunction(this, 'model', this.basePath));
                 }