Fixed a compilation issue with min() and max() methods on the stencils

Signed-off-by: Nick Avramoussis <4256455+Idclip@users.noreply.github.com>

Author: Idclip

openvdb/openvdb/math/Stencils.h

@@ -40,7 +40,6 @@ class BaseStencil
     typedef typename GridT::ValueType                   ValueType;
     typedef tree::ValueAccessor<const TreeType, IsSafe> AccessorType;
     typedef std::vector<ValueType>                      BufferType;
-    typedef typename BufferType::iterator               IterType;
 
     /// @brief Initialize the stencil buffer with the values of voxel (i, j, k)
     /// and its neighbors.
@@ -146,14 +145,14 @@ class BaseStencil
     /// @brief Return the smallest value in the stencil buffer.
     inline ValueType min() const
     {
-        IterType iter = std::min_element(mValues.begin(), mValues.end());
+        const auto iter = std::min_element(mValues.begin(), mValues.end());
         return *iter;
     }
 
     /// @brief Return the largest value in the stencil buffer.
     inline ValueType max() const
     {
-        IterType iter = std::max_element(mValues.begin(), mValues.end());
+        const auto iter = std::max_element(mValues.begin(), mValues.end());
         return *iter;
     }
 

openvdb/openvdb/unittest/CMakeLists.txt

@@ -162,6 +162,7 @@ else()
     TestQuat.cc
     TestRay.cc
     TestStats.cc
+    TestStencils.cc
     TestStream.cc
     TestStreamCompression.cc
     TestStringMetadata.cc

openvdb/openvdb/unittest/TestStencils.cc

@@ -0,0 +1,40 @@
+// Copyright Contributors to the OpenVDB Project
+// SPDX-License-Identifier: MPL-2.0
+
+#include <openvdb/openvdb.h>
+#include <openvdb/math/Stencils.h>
+
+#include <gtest/gtest.h>
+
+
+class TestStencils : public ::testing::Test
+{
+};
+
+TEST_F(TestStencils, testMinMax)
+{
+    using namespace openvdb;
+
+    Int32Grid grid;
+    grid.tree().setValue(math::Coord(0,0,0), -3);
+    grid.tree().setValue(math::Coord(0,0,1), -2);
+    grid.tree().setValue(math::Coord(0,1,0), -1);
+    grid.tree().setValue(math::Coord(1,0,0),  0);
+    grid.tree().setValue(math::Coord(1,1,0),  1);
+    grid.tree().setValue(math::Coord(0,1,1),  2);
+    grid.tree().setValue(math::Coord(1,0,1),  3);
+    grid.tree().setValue(math::Coord(1,1,1),  4);
+    math::BoxStencil<Int32Grid> stencil(grid);
+
+    stencil.moveTo(Coord(0,0,0));
+    EXPECT_EQ(stencil.min(), -3);
+    EXPECT_EQ(stencil.max(), 4);
+
+    stencil.moveTo(Coord(1,1,1));
+    EXPECT_EQ(stencil.min(), 0);
+    EXPECT_EQ(stencil.max(), 4);
+
+    stencil.moveTo(Coord(0,0,1));
+    EXPECT_EQ(stencil.min(), -2);
+    EXPECT_EQ(stencil.max(),  4);
+}

pendingchanges/stencil_minmax.txt

@@ -0,0 +1,5 @@
+OpenVDB:
+    - Bug Fixes:
+        Fixed a compilation issue with the min() and max() methods on Stencils
+        in openvdb/math/Stencils.h
+        [Reported by Samuel Mauch]