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///////////////////////////////////////////////////////////////////////////
//
// Copyright (c) 2012-2013 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/MeshToVolume.h>
#include <openvdb/util/Util.h>
class TestMeshToVolume: public CppUnit::TestCase
{
public:
CPPUNIT_TEST_SUITE(TestMeshToVolume);
CPPUNIT_TEST(testUtils);
CPPUNIT_TEST(testVoxelizer);
CPPUNIT_TEST(testPrimitiveVoxelRatio);
CPPUNIT_TEST(testIntersectingVoxelCleaner);
CPPUNIT_TEST(testShellVoxelCleaner);
CPPUNIT_TEST(testConversion);
CPPUNIT_TEST_SUITE_END();
void testUtils();
void testVoxelizer();
void testPrimitiveVoxelRatio();
void testIntersectingVoxelCleaner();
void testShellVoxelCleaner();
void testConversion();
};
CPPUNIT_TEST_SUITE_REGISTRATION(TestMeshToVolume);
////////////////////////////////////////
void
TestMeshToVolume::testUtils()
{
/// Test nearestCoord
openvdb::Vec3d xyz(0.7, 2.2, -2.7);
openvdb::Coord ijk = openvdb::util::nearestCoord(xyz);
CPPUNIT_ASSERT(ijk[0] == 0 && ijk[1] == 2 && ijk[2] == -3);
xyz = openvdb::Vec3d(-22.1, 4.6, 202.34);
ijk = openvdb::util::nearestCoord(xyz);
CPPUNIT_ASSERT(ijk[0] == -23 && ijk[1] == 4 && ijk[2] == 202);
/// Test the coordinate offset table for neghbouring voxels
openvdb::Coord sum(0, 0, 0);
unsigned int pX = 0, pY = 0, pZ = 0, mX = 0, mY = 0, mZ = 0;
for (unsigned int i = 0; i < 26; ++i) {
ijk = openvdb::util::COORD_OFFSETS[i];
sum += ijk;
if (ijk[0] == 1) ++pX;
else if (ijk[0] == -1) ++mX;
if (ijk[1] == 1) ++pY;
else if (ijk[1] == -1) ++mY;
if (ijk[2] == 1) ++pZ;
else if (ijk[2] == -1) ++mZ;
}
CPPUNIT_ASSERT(sum == openvdb::Coord(0, 0, 0));
CPPUNIT_ASSERT( pX == 9);
CPPUNIT_ASSERT( pY == 9);
CPPUNIT_ASSERT( pZ == 9);
CPPUNIT_ASSERT( mX == 9);
CPPUNIT_ASSERT( mY == 9);
CPPUNIT_ASSERT( mZ == 9);
}
void
TestMeshToVolume::testVoxelizer()
{
std::vector<openvdb::Vec3s> pointList;
std::vector<openvdb::Vec4I> polygonList;
typedef openvdb::tools::internal::MeshVoxelizer<openvdb::FloatTree> MeshVoxelizer;
// CASE 1: One triangle
pointList.push_back(openvdb::Vec3s(0.0, 0.0, 0.0));
pointList.push_back(openvdb::Vec3s(0.0, 0.0, 3.0));
pointList.push_back(openvdb::Vec3s(0.0, 3.0, 0.0));
polygonList.push_back(openvdb::Vec4I(0, 1, 2, openvdb::util::INVALID_IDX));
{
MeshVoxelizer voxelizer(pointList, polygonList);
voxelizer.run();
// Check for mesh intersecting voxels
CPPUNIT_ASSERT(13== voxelizer.intersectionTree().activeVoxelCount());
// topologically unique voxels.
CPPUNIT_ASSERT(99 == voxelizer.sqrDistTree().activeVoxelCount());
CPPUNIT_ASSERT(99 == voxelizer.primIndexTree().activeVoxelCount());
}
// CASE 2: Two triangles
pointList.push_back(openvdb::Vec3s(0.0, 3.0, 3.0));
polygonList.push_back(openvdb::Vec4I(1, 3, 2, openvdb::util::INVALID_IDX));
{
MeshVoxelizer voxelizer(pointList, polygonList);
voxelizer.run();
// Check for mesh intersecting voxels
CPPUNIT_ASSERT(16 == voxelizer.intersectionTree().activeVoxelCount());
// topologically unique voxels.
CPPUNIT_ASSERT(108 == voxelizer.sqrDistTree().activeVoxelCount());
CPPUNIT_ASSERT(108 == voxelizer.primIndexTree().activeVoxelCount());
}
// CASE 3: One quad
polygonList.clear();
polygonList.push_back(openvdb::Vec4I(0, 1, 3, 2));
{
MeshVoxelizer voxelizer(pointList, polygonList);
voxelizer.run();
// Check for mesh intersecting voxels
CPPUNIT_ASSERT(16 == voxelizer.intersectionTree().activeVoxelCount());
// topologically unique voxels.
CPPUNIT_ASSERT(108 == voxelizer.sqrDistTree().activeVoxelCount());
CPPUNIT_ASSERT(108 == voxelizer.primIndexTree().activeVoxelCount());
}
// CASE 4: Two triangles and one quad
pointList.push_back(openvdb::Vec3s(0.0, 0.0, 6.0));
pointList.push_back(openvdb::Vec3s(0.0, 3.0, 6.0));
polygonList.clear();
polygonList.push_back(openvdb::Vec4I(0, 1, 2, openvdb::util::INVALID_IDX));
polygonList.push_back(openvdb::Vec4I(1, 3, 2, openvdb::util::INVALID_IDX));
polygonList.push_back(openvdb::Vec4I(1, 4, 5, 3));
{
MeshVoxelizer voxelizer(pointList, polygonList);
voxelizer.run();
// Check for 28 mesh intersecting voxels
CPPUNIT_ASSERT(28 == voxelizer.intersectionTree().activeVoxelCount());
// 154 topologically unique voxels.
CPPUNIT_ASSERT(162 == voxelizer.sqrDistTree().activeVoxelCount());
CPPUNIT_ASSERT(162 == voxelizer.primIndexTree().activeVoxelCount());
}
}
void
TestMeshToVolume::testPrimitiveVoxelRatio()
{
std::vector<openvdb::Vec3s> pointList;
std::vector<openvdb::Vec4I> polygonList;
// Create one big triangle
pointList.push_back(openvdb::Vec3s(0.0, 0.0, 0.0));
pointList.push_back(openvdb::Vec3s(0.0, 0.0, 250.0));
pointList.push_back(openvdb::Vec3s(0.0, 100.0, 0.0));
polygonList.push_back(openvdb::Vec4I(0, 1, 2, openvdb::util::INVALID_IDX));
openvdb::tools::internal::MeshVoxelizer<openvdb::FloatTree>
voxelizer(pointList, polygonList);
voxelizer.run();
CPPUNIT_ASSERT(0 != voxelizer.intersectionTree().activeVoxelCount());
}
void
TestMeshToVolume::testIntersectingVoxelCleaner()
{
// Empty tree's
openvdb::FloatTree distTree(std::numeric_limits<float>::max());
openvdb::BoolTree intersectionTree(false);
openvdb::Int32Tree indexTree(openvdb::util::INVALID_IDX);
openvdb::tree::ValueAccessor<openvdb::FloatTree> distAcc(distTree);
openvdb::tree::ValueAccessor<openvdb::BoolTree> intersectionAcc(intersectionTree);
openvdb::tree::ValueAccessor<openvdb::Int32Tree> indexAcc(indexTree);
// Add a row of intersecting voxels surrounded by both positive and negative distance values.
for (int i = 0; i < 10; ++i) {
for (int j = -1; j < 2; ++j) {
distAcc.setValue(openvdb::Coord(i,j,0), (float)j);
indexAcc.setValue(openvdb::Coord(i,j,0), 10);
}
intersectionAcc.setValue(openvdb::Coord(i,0,0), 1);
}
unsigned int numSDFVoxels = distTree.activeVoxelCount();
unsigned int numIVoxels = intersectionTree.activeVoxelCount();
unsigned int numCPVoxels = indexTree.activeVoxelCount();
{
openvdb::tree::LeafManager<openvdb::BoolTree> leafs(intersectionTree);
openvdb::tools::internal::IntersectingVoxelCleaner<openvdb::FloatTree>
cleaner(distTree, indexTree, intersectionTree, leafs);
cleaner.run();
}
CPPUNIT_ASSERT(numSDFVoxels == distTree.activeVoxelCount());
CPPUNIT_ASSERT(numIVoxels == intersectionTree.activeVoxelCount());
CPPUNIT_ASSERT(numCPVoxels == indexTree.activeVoxelCount());
// Add a row of intersecting voxels that are not surrounded by any positive distance values.
for (int i = 0; i < 10; ++i) {
for (int j = -1; j < 2; ++j) {
distAcc.setValue(openvdb::Coord(i,j,0), -1.0);
indexAcc.setValue(openvdb::Coord(i,j,0), 10);
}
intersectionAcc.setValue(openvdb::Coord(i,0,0), 1);
}
numIVoxels = 0;
{
openvdb::tree::LeafManager<openvdb::BoolTree> leafs(intersectionTree);
openvdb::tools::internal::IntersectingVoxelCleaner<openvdb::FloatTree>
cleaner(distTree, indexTree, intersectionTree, leafs);
cleaner.run();
}
CPPUNIT_ASSERT(numSDFVoxels == distTree.activeVoxelCount());
CPPUNIT_ASSERT(numIVoxels == intersectionTree.activeVoxelCount());
CPPUNIT_ASSERT(numCPVoxels == indexTree.activeVoxelCount());
}
void
TestMeshToVolume::testShellVoxelCleaner()
{
// Empty tree's
openvdb::FloatTree distTree(std::numeric_limits<float>::max());
openvdb::BoolTree intersectionTree(false);
openvdb::Int32Tree indexTree(openvdb::util::INVALID_IDX);
openvdb::tree::ValueAccessor<openvdb::FloatTree> distAcc(distTree);
openvdb::tree::ValueAccessor<openvdb::BoolTree> intersectionAcc(intersectionTree);
openvdb::tree::ValueAccessor<openvdb::Int32Tree> indexAcc(indexTree);
/// Add a row of intersecting voxels surrounded by negative distance values.
for (int i = 0; i < 10; ++i) {
for (int j = -1; j < 2; ++j) {
distAcc.setValue(openvdb::Coord(i,j,0), -1.0);
indexAcc.setValue(openvdb::Coord(i,j,0), 10);
}
intersectionAcc.setValue(openvdb::Coord(i,0,0), 1);
}
unsigned int numSDFVoxels = distTree.activeVoxelCount();
unsigned int numIVoxels = intersectionTree.activeVoxelCount();
unsigned int numCPVoxels = indexTree.activeVoxelCount();
{
openvdb::tree::LeafManager<openvdb::FloatTree> leafs(distTree);
openvdb::tools::internal::ShellVoxelCleaner<openvdb::FloatTree>
cleaner(distTree, leafs, indexTree, intersectionTree);
cleaner.run();
}
CPPUNIT_ASSERT(numSDFVoxels == distTree.activeVoxelCount());
CPPUNIT_ASSERT(numIVoxels == intersectionTree.activeVoxelCount());
CPPUNIT_ASSERT(numCPVoxels == indexTree.activeVoxelCount());
intersectionTree.clear();
{
openvdb::tree::LeafManager<openvdb::FloatTree> leafs(distTree);
openvdb::tools::internal::ShellVoxelCleaner<openvdb::FloatTree>
cleaner(distTree, leafs, indexTree, intersectionTree);
cleaner.run();
}
CPPUNIT_ASSERT(0 == distTree.activeVoxelCount());
CPPUNIT_ASSERT(0 == intersectionTree.activeVoxelCount());
CPPUNIT_ASSERT(0 == indexTree.activeVoxelCount());;
}
void
TestMeshToVolume::testConversion()
{
using namespace openvdb;
std::vector<Vec3s> points;
std::vector<Vec4I> quads;
// cube vertices
points.push_back(Vec3s(2, 2, 2)); // 0 6--------7
points.push_back(Vec3s(5, 2, 2)); // 1 /| /|
points.push_back(Vec3s(2, 5, 2)); // 2 2--------3 |
points.push_back(Vec3s(5, 5, 2)); // 3 | | | |
points.push_back(Vec3s(2, 2, 5)); // 4 | 4----- |-5
points.push_back(Vec3s(5, 2, 5)); // 5 |/ |/
points.push_back(Vec3s(2, 5, 5)); // 6 0--------1
points.push_back(Vec3s(5, 5, 5)); // 7
// cube faces
quads.push_back(Vec4I(0, 1, 3, 2)); // front
quads.push_back(Vec4I(5, 4, 6, 7)); // back
quads.push_back(Vec4I(0, 2, 6, 4)); // left
quads.push_back(Vec4I(1, 5, 7, 3)); // right
quads.push_back(Vec4I(2, 3, 7, 6)); // top
quads.push_back(Vec4I(0, 4, 5, 1)); // bottom
FloatGrid::Ptr grid = tools::meshToLevelSet<FloatGrid>(
*math::Transform::createLinearTransform(), points, quads);
//io::File("/tmp/cube.vdb").write(GridPtrVec(1, grid));
CPPUNIT_ASSERT(grid.get() != NULL);
CPPUNIT_ASSERT_EQUAL(int(GRID_LEVEL_SET), int(grid->getGridClass()));
CPPUNIT_ASSERT_EQUAL(1, int(grid->baseTree().leafCount()));
/// @todo validate output
}
// Copyright (c) 2012-2013 DreamWorks Animation LLC
// All rights reserved. This software is distributed under the
// Mozilla Public License 2.0 ( http://www.mozilla.org/MPL/2.0/ )
|
