Add updateStyleVariables method to WebGLPoints layer

src/ol/layer/WebGLPoints.js

@@ -87,6 +87,12 @@ class WebGLPointsLayer extends Layer {
      */
     this.parseResult_ = parseLiteralStyle(options.style);
 
+    /**
+     * @type {Object<string, (string|number)>}
+     * @private
+     */
+    this.styleVariables_ = options.style.variables || {};
+
     /**
      * @private
      * @type {boolean}
@@ -108,6 +114,15 @@ class WebGLPointsLayer extends Layer {
       attributes: this.parseResult_.attributes,
     });
   }
+
+  /**
+   * Update any variables used by the layer style and trigger a re-render.
+   * @param {Object<string, number>} variables Variables to update.
+   */
+  updateStyleVariables(variables) {
+    assign(this.styleVariables_, variables);
+    this.changed();
+  }
 }
 
 export default WebGLPointsLayer;