Add early-exit optimization for LeafNode::resetBackground()

NBickford-NV · NBickford-NV · commit 5475fe30f34b · 2024-01-12T17:26:22.000-08:00
Signed-off-by: Neil Bickford &lt;nbickford@nvidia.com&gt;
diff --git a/openvdb/openvdb/tree/LeafNode.h b/openvdb/openvdb/tree/LeafNode.h
@@ -1610,6 +1610,7 @@ LeafNode<T, Log2Dim>::resetBackground(const ValueType& oldBackground,
                                       const ValueType& newBackground)
 {
     if (!this->allocate()) return;
+    if (oldBackground == newBackground || math::negative(oldBackground) == newBackground) return;
 
     typename NodeMaskType::OffIterator iter;
     // For all inactive values...

Original file line number	Diff line number	Diff line change
`@@ -1610,6 +1610,7 @@ LeafNode<T, Log2Dim>::resetBackground(const ValueType& oldBackground,`
`1610`	`1610`	`const ValueType& newBackground)`
`1611`	`1611`	`{`
`1612`	`1612`	`if (!this->allocate()) return;`
	`1613`	`+ if (oldBackground == newBackground \|\| math::negative(oldBackground) == newBackground) return;`
`1613`	`1614`
`1614`	`1615`	`typename NodeMaskType::OffIterator iter;`
`1615`	`1616`	`// For all inactive values...`