AABB clarification (mrdoob#23125)

FloraCat526 · Jan 18, 2022 · 249e041 · 249e041
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Showing 2 changed files with 6 additions and 4 deletions.
diff --git a/docs/api/en/math/Box3.html b/docs/api/en/math/Box3.html
@@ -268,9 +268,9 @@ <h3>[method:this setFromObject]( [param:Object3D object] )</h3>
 		<p>
 		[page:Object3D object] - [page:Object3D] to compute the bounding box of.<br /><br />
 
-		Computes the world-axis-aligned bounding box of an [page:Object3D] (including its children),
-		accounting for the object's, and children's, world transforms.
-		The function may result in a larger box than strictly necessary.
+		Computes a world-axis-aligned bounding box of an [page:Object3D] (including its children),
+		accounting for the object's, and children's, world transforms.<br /><br />
+		For computational efficiency, the computed bounding box may be larger than the <em>minimal</em> world-axis-aligned bounding box.
 
 		</p>
 

diff --git a/src/math/Box3.js b/src/math/Box3.js
@@ -191,7 +191,9 @@ class Box3 {
 	expandByObject( object ) {
 
 		// Computes the world-axis-aligned bounding box of an object (including its children),
-		// accounting for both the object's, and children's, world transforms
+		// accounting for both the object's, and children's, world transforms.
+
+		// For computational efficiency, the computed bounding box may be larger than the minimal world-axis-aligned bounding box.
 
 		object.updateWorldMatrix( false, false );