Hit detection respects min and maxResolution

src/ol/layer/layer.js

@@ -37,6 +37,20 @@ ol.layer.Layer = function(options) {
 goog.inherits(ol.layer.Layer, ol.layer.Base);
 
 
+/**
+ * Return `true` if the layer is visible, and if the passed resolution is
+ * between the layer's minResolution and maxResolution. The comparison is
+ * inclusive for `minResolution` and exclusive for `maxResolution`.
+ * @param {ol.layer.LayerState} layerState Layer state.
+ * @param {number} resolution Resolution.
+ * @return {boolean} The layer is visible at the given resolution.
+ */
+ol.layer.Layer.visibleAtResolution = function(layerState, resolution) {
+  return layerState.visible && resolution >= layerState.minResolution &&
+      resolution < layerState.maxResolution;
+};
+
+
 /**
  * @inheritDoc
  */