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///////////////////////////////////////////////////////////////////////////
//
// Copyright (c) 2012-2018 DreamWorks Animation LLC
//
// All rights reserved. This software is distributed under the
// Mozilla Public License 2.0 ( http://www.mozilla.org/MPL/2.0/ )
//
// Redistributions of source code must retain the above copyright
// and license notice and the following restrictions and disclaimer.
//
// * Neither the name of DreamWorks Animation nor the names of
// its contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// IN NO EVENT SHALL THE COPYRIGHT HOLDERS' AND CONTRIBUTORS' AGGREGATE
// LIABILITY FOR ALL CLAIMS REGARDLESS OF THEIR BASIS EXCEED US$250.00.
//
///////////////////////////////////////////////////////////////////////////
#include <vector>
#include <cppunit/extensions/HelperMacros.h>
#include <openvdb/openvdb.h>
#include <openvdb/Exceptions.h>
#include <openvdb/tools/LevelSetUtil.h>
#include <openvdb/tools/MeshToVolume.h> // for createLevelSetBox()
#include <openvdb/tools/Composite.h> // for csgDifference()
class TestLevelSetUtil: public CppUnit::TestCase
{
public:
CPPUNIT_TEST_SUITE(TestLevelSetUtil);
CPPUNIT_TEST(testSDFToFogVolume);
CPPUNIT_TEST(testSDFInteriorMask);
CPPUNIT_TEST(testExtractEnclosedRegion);
CPPUNIT_TEST(testSegmentationTools);
CPPUNIT_TEST_SUITE_END();
void testSDFToFogVolume();
void testSDFInteriorMask();
void testExtractEnclosedRegion();
void testSegmentationTools();
};
CPPUNIT_TEST_SUITE_REGISTRATION(TestLevelSetUtil);
////////////////////////////////////////
void
TestLevelSetUtil::testSDFToFogVolume()
{
openvdb::FloatGrid::Ptr grid = openvdb::FloatGrid::create(10.0);
grid->fill(openvdb::CoordBBox(openvdb::Coord(-100), openvdb::Coord(100)), 9.0);
grid->fill(openvdb::CoordBBox(openvdb::Coord(-50), openvdb::Coord(50)), -9.0);
openvdb::tools::sdfToFogVolume(*grid);
CPPUNIT_ASSERT(grid->background() < 1e-7);
openvdb::FloatGrid::ValueOnIter iter = grid->beginValueOn();
for (; iter; ++iter) {
CPPUNIT_ASSERT(iter.getValue() > 0.0);
CPPUNIT_ASSERT(std::abs(iter.getValue() - 1.0) < 1e-7);
}
}
void
TestLevelSetUtil::testSDFInteriorMask()
{
typedef openvdb::FloatGrid FloatGrid;
typedef openvdb::BoolGrid BoolGrid;
typedef openvdb::Vec3s Vec3s;
typedef openvdb::math::BBox<Vec3s> BBoxs;
typedef openvdb::math::Transform Transform;
BBoxs bbox(Vec3s(0.0, 0.0, 0.0), Vec3s(1.0, 1.0, 1.0));
Transform::Ptr transform = Transform::createLinearTransform(0.1);
FloatGrid::Ptr sdfGrid = openvdb::tools::createLevelSetBox<FloatGrid>(bbox, *transform);
BoolGrid::Ptr maskGrid = openvdb::tools::sdfInteriorMask(*sdfGrid);
// test inside coord value
openvdb::Coord ijk = transform->worldToIndexNodeCentered(openvdb::Vec3d(0.5, 0.5, 0.5));
CPPUNIT_ASSERT(maskGrid->tree().getValue(ijk) == true);
// test outside coord value
ijk = transform->worldToIndexNodeCentered(openvdb::Vec3d(1.5, 1.5, 1.5));
CPPUNIT_ASSERT(maskGrid->tree().getValue(ijk) == false);
}
void
TestLevelSetUtil::testExtractEnclosedRegion()
{
typedef openvdb::FloatGrid FloatGrid;
typedef openvdb::BoolGrid BoolGrid;
typedef openvdb::Vec3s Vec3s;
typedef openvdb::math::BBox<Vec3s> BBoxs;
typedef openvdb::math::Transform Transform;
BBoxs regionA(Vec3s(0.0f, 0.0f, 0.0f), Vec3s(3.0f, 3.0f, 3.0f));
BBoxs regionB(Vec3s(1.0f, 1.0f, 1.0f), Vec3s(2.0f, 2.0f, 2.0f));
Transform::Ptr transform = Transform::createLinearTransform(0.1);
FloatGrid::Ptr sdfGrid = openvdb::tools::createLevelSetBox<FloatGrid>(regionA, *transform);
FloatGrid::Ptr sdfGridB = openvdb::tools::createLevelSetBox<FloatGrid>(regionB, *transform);
openvdb::tools::csgDifference(*sdfGrid, *sdfGridB);
BoolGrid::Ptr maskGrid = openvdb::tools::extractEnclosedRegion(*sdfGrid);
// test inside ls region coord value
openvdb::Coord ijk = transform->worldToIndexNodeCentered(openvdb::Vec3d(1.5, 1.5, 1.5));
CPPUNIT_ASSERT(maskGrid->tree().getValue(ijk) == true);
// test outside coord value
ijk = transform->worldToIndexNodeCentered(openvdb::Vec3d(3.5, 3.5, 3.5));
CPPUNIT_ASSERT(maskGrid->tree().getValue(ijk) == false);
}
void
TestLevelSetUtil::testSegmentationTools()
{
typedef openvdb::FloatGrid FloatGrid;
typedef openvdb::Vec3s Vec3s;
typedef openvdb::math::BBox<Vec3s> BBoxs;
typedef openvdb::math::Transform Transform;
{ // Test SDF segmentation
// Create two sdf boxes with overlapping narrow-bands.
BBoxs regionA(Vec3s(0.0f, 0.0f, 0.0f), Vec3s(2.0f, 2.0f, 2.0f));
BBoxs regionB(Vec3s(2.5f, 0.0f, 0.0f), Vec3s(4.3f, 2.0f, 2.0f));
Transform::Ptr transform = Transform::createLinearTransform(0.1);
FloatGrid::Ptr sdfGrid = openvdb::tools::createLevelSetBox<FloatGrid>(regionA, *transform);
FloatGrid::Ptr sdfGridB = openvdb::tools::createLevelSetBox<FloatGrid>(regionB, *transform);
openvdb::tools::csgUnion(*sdfGrid, *sdfGridB);
std::vector<FloatGrid::Ptr> segments;
// This tool will not identify two separate segments when the narrow-bands overlap.
openvdb::tools::segmentActiveVoxels(*sdfGrid, segments);
CPPUNIT_ASSERT(segments.size() == 1);
segments.clear();
// This tool should properly identify two separate segments
openvdb::tools::segmentSDF(*sdfGrid, segments);
CPPUNIT_ASSERT(segments.size() == 2);
// test inside ls region coord value
openvdb::Coord ijk = transform->worldToIndexNodeCentered(openvdb::Vec3d(1.5, 1.5, 1.5));
CPPUNIT_ASSERT(segments[0]->tree().getValue(ijk) < 0.0f);
// test outside coord value
ijk = transform->worldToIndexNodeCentered(openvdb::Vec3d(3.5, 3.5, 3.5));
CPPUNIT_ASSERT(segments[0]->tree().getValue(ijk) > 0.0f);
}
{ // Test fog volume with active tiles
openvdb::FloatGrid::Ptr grid = openvdb::FloatGrid::create(0.0);
grid->fill(openvdb::CoordBBox(openvdb::Coord(0), openvdb::Coord(50)), 1.0);
grid->fill(openvdb::CoordBBox(openvdb::Coord(60), openvdb::Coord(100)), 1.0);
CPPUNIT_ASSERT(grid->tree().hasActiveTiles() == true);
std::vector<FloatGrid::Ptr> segments;
openvdb::tools::segmentActiveVoxels(*grid, segments);
CPPUNIT_ASSERT(segments.size() == 2);
}
}
// Copyright (c) 2012-2018 DreamWorks Animation LLC
// All rights reserved. This software is distributed under the
// Mozilla Public License 2.0 ( http://www.mozilla.org/MPL/2.0/ )
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