From a2388756f26f9482936ccb6a8f7c58cd7a37ed06 Mon Sep 17 00:00:00 2001
From: Andreas Hocevar <andreas.hocevar@gmail.com>
Date: Thu, 6 Jan 2022 20:07:34 +0100
Subject: [PATCH 1/2] Use getFeaturesInExtent

---
 examples/box-selection.js | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/examples/box-selection.js b/examples/box-selection.js
index 61962b310d..08466edae6 100644
--- a/examples/box-selection.js
+++ b/examples/box-selection.js
@@ -42,6 +42,9 @@ const dragBox = new DragBox({
 map.addInteraction(dragBox);
 
 dragBox.on('boxend', function () {
+  const extent = dragBox.getGeometry().getExtent();
+  const boxFeatures = vectorSource.getFeaturesInExtent(extent);
+
   // features that intersect the box geometry are added to the
   // collection of selected features
 
@@ -50,11 +53,6 @@ dragBox.on('boxend', function () {
   // be added directly to the collection
   const rotation = map.getView().getRotation();
   const oblique = rotation % (Math.PI / 2) !== 0;
-  const candidateFeatures = oblique ? [] : selectedFeatures;
-  const extent = dragBox.getGeometry().getExtent();
-  vectorSource.forEachFeatureIntersectingExtent(extent, function (feature) {
-    candidateFeatures.push(feature);
-  });
 
   // when the view is obliquely rotated the box extent will
   // exceed its geometry so both the box and the candidate
@@ -66,13 +64,15 @@ dragBox.on('boxend', function () {
     const geometry = dragBox.getGeometry().clone();
     geometry.rotate(-rotation, anchor);
     const extent = geometry.getExtent();
-    candidateFeatures.forEach(function (feature) {
+    boxFeatures.forEach(function (feature) {
       const geometry = feature.getGeometry().clone();
       geometry.rotate(-rotation, anchor);
       if (geometry.intersectsExtent(extent)) {
         selectedFeatures.push(feature);
       }
     });
+  } else {
+    selectedFeatures.extend(boxFeatures);
   }
 });
 

From c785c2813b20c1823be4819f48535bc820453fe1 Mon Sep 17 00:00:00 2001
From: Andreas Hocevar <andreas.hocevar@gmail.com>
Date: Thu, 6 Jan 2022 21:10:26 +0100
Subject: [PATCH 2/2] Filter for actual geometry intersection

---
 examples/box-selection.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/examples/box-selection.js b/examples/box-selection.js
index 08466edae6..7b9af7ad13 100644
--- a/examples/box-selection.js
+++ b/examples/box-selection.js
@@ -43,7 +43,9 @@ map.addInteraction(dragBox);
 
 dragBox.on('boxend', function () {
   const extent = dragBox.getGeometry().getExtent();
-  const boxFeatures = vectorSource.getFeaturesInExtent(extent);
+  const boxFeatures = vectorSource
+    .getFeaturesInExtent(extent)
+    .filter((feature) => feature.getGeometry().intersectsExtent(extent));
 
   // features that intersect the box geometry are added to the
   // collection of selected features