From f862526bb7361724066d9bc20f696ce86c85c331 Mon Sep 17 00:00:00 2001
From: tamasmeszaros <meszaros.q@gmail.com>
Date: Wed, 22 Jun 2022 17:38:18 +0200
Subject: [PATCH] Minor optimization for mesh_to_grid

---
 src/libslic3r/OpenVDBUtils.cpp | 18 ++++++++++--------
 1 file changed, 10 insertions(+), 8 deletions(-)

diff --git a/src/libslic3r/OpenVDBUtils.cpp b/src/libslic3r/OpenVDBUtils.cpp
index 2c207bb6a7..167b14dd5e 100644
--- a/src/libslic3r/OpenVDBUtils.cpp
+++ b/src/libslic3r/OpenVDBUtils.cpp
@@ -81,15 +81,17 @@ openvdb::FloatGrid::Ptr mesh_to_grid(const indexed_triangle_set &    mesh,
 
     constexpr int DilateIterations = 1;
 
-    grid = openvdb::tools::dilateSdf(
-        *grid, interiorBandWidth, openvdb::tools::NN_FACE_EDGE,
-        DilateIterations,
-        openvdb::tools::FastSweepingDomain::SWEEP_LESS_THAN_ISOVALUE);
+    if (interiorBandWidth > 1.f)
+        grid = openvdb::tools::dilateSdf(
+            *grid, interiorBandWidth, openvdb::tools::NN_FACE_EDGE,
+            DilateIterations,
+            openvdb::tools::FastSweepingDomain::SWEEP_LESS_THAN_ISOVALUE);
 
-    grid = openvdb::tools::dilateSdf(
-        *grid, exteriorBandWidth, openvdb::tools::NN_FACE_EDGE,
-        DilateIterations,
-        openvdb::tools::FastSweepingDomain::SWEEP_GREATER_THAN_ISOVALUE);
+    if (exteriorBandWidth > 1.f)
+        grid = openvdb::tools::dilateSdf(
+            *grid, exteriorBandWidth, openvdb::tools::NN_FACE_EDGE,
+            DilateIterations,
+            openvdb::tools::FastSweepingDomain::SWEEP_GREATER_THAN_ISOVALUE);
 
     grid->insertMeta("voxel_scale", openvdb::FloatMetadata(voxel_scale));