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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/Types.h>
#include <openvdb/tree/LeafNode.h>
#include <openvdb/tools/ParticlesToLevelSet.h>
#define ASSERT_DOUBLES_EXACTLY_EQUAL(expected, actual) \
CPPUNIT_ASSERT_DOUBLES_EQUAL((expected), (actual), /*tolerance=*/0.0);
class TestParticlesToLevelSet: public CppUnit::TestFixture
{
public:
virtual void setUp() {openvdb::initialize();}
virtual void tearDown() {openvdb::uninitialize();}
void writeGrid(openvdb::GridBase::Ptr grid, std::string fileName) const
{
std::cout << "\nWriting \""<<fileName<<"\" to file\n";
grid->setName("TestParticlesToLevelSet");
openvdb::GridPtrVec grids;
grids.push_back(grid);
openvdb::io::File file(fileName + ".vdb");
file.write(grids);
file.close();
}
CPPUNIT_TEST_SUITE(TestParticlesToLevelSet);
CPPUNIT_TEST(testMyParticleList);
CPPUNIT_TEST(testRasterizeSpheres);
CPPUNIT_TEST(testRasterizeSpheresAndId);
CPPUNIT_TEST(testRasterizeTrails);
CPPUNIT_TEST(testRasterizeTrailsAndId);
CPPUNIT_TEST_SUITE_END();
void testMyParticleList();
void testRasterizeSpheres();
void testRasterizeSpheresAndId();
void testRasterizeTrails();
void testRasterizeTrailsAndId();
};
CPPUNIT_TEST_SUITE_REGISTRATION(TestParticlesToLevelSet);
class MyParticleList
{
protected:
struct MyParticle {
openvdb::Vec3R p, v;
openvdb::Real r;
};
openvdb::Real mRadiusScale;
openvdb::Real mVelocityScale;
std::vector<MyParticle> mParticleList;
public:
typedef openvdb::Vec3R PosType;
MyParticleList(openvdb::Real rScale=1, openvdb::Real vScale=1)
: mRadiusScale(rScale), mVelocityScale(vScale) {}
void add(const openvdb::Vec3R &p, const openvdb::Real &r,
const openvdb::Vec3R &v=openvdb::Vec3R(0,0,0))
{
MyParticle pa;
pa.p = p;
pa.r = r;
pa.v = v;
mParticleList.push_back(pa);
}
/// @return coordinate bbox in the space of the specified transfrom
openvdb::CoordBBox getBBox(const openvdb::GridBase& grid) {
openvdb::CoordBBox bbox;
openvdb::Coord &min= bbox.min(), &max = bbox.max();
openvdb::Vec3R pos;
openvdb::Real rad, invDx = 1/grid.voxelSize()[0];
for (size_t n=0, e=this->size(); n<e; ++n) {
this->getPosRad(n, pos, rad);
const openvdb::Vec3d xyz = grid.worldToIndex(pos);
const openvdb::Real r = rad * invDx;
for (int i=0; i<3; ++i) {
min[i] = openvdb::math::Min(min[i], openvdb::math::Floor(xyz[i] - r));
max[i] = openvdb::math::Max(max[i], openvdb::math::Ceil( xyz[i] + r));
}
}
return bbox;
}
//typedef int AttributeType;
// The methods below are only required for the unit-tests
openvdb::Vec3R pos(int n) const {return mParticleList[n].p;}
openvdb::Vec3R vel(int n) const {return mVelocityScale*mParticleList[n].v;}
openvdb::Real radius(int n) const {return mRadiusScale*mParticleList[n].r;}
//////////////////////////////////////////////////////////////////////////////
/// The methods below are the only ones required by tools::ParticleToLevelSet
/// @note We return by value since the radius and velocities are modified
/// by the scaling factors! Also these methods are all assumed to
/// be thread-safe.
/// Return the total number of particles in list.
/// Always required!
size_t size() const { return mParticleList.size(); }
/// Get the world space position of n'th particle.
/// Required by ParticledToLevelSet::rasterizeSphere(*this,radius).
void getPos(size_t n, openvdb::Vec3R&pos) const { pos = mParticleList[n].p; }
void getPosRad(size_t n, openvdb::Vec3R& pos, openvdb::Real& rad) const {
pos = mParticleList[n].p;
rad = mRadiusScale*mParticleList[n].r;
}
void getPosRadVel(size_t n, openvdb::Vec3R& pos, openvdb::Real& rad, openvdb::Vec3R& vel) const {
pos = mParticleList[n].p;
rad = mRadiusScale*mParticleList[n].r;
vel = mVelocityScale*mParticleList[n].v;
}
// The method below is only required for attribute transfer
void getAtt(size_t n, openvdb::Index32& att) const { att = openvdb::Index32(n); }
};
void
TestParticlesToLevelSet::testMyParticleList()
{
MyParticleList pa;
CPPUNIT_ASSERT_EQUAL(0, int(pa.size()));
pa.add(openvdb::Vec3R(10,10,10), 2, openvdb::Vec3R(1,0,0));
CPPUNIT_ASSERT_EQUAL(1, int(pa.size()));
ASSERT_DOUBLES_EXACTLY_EQUAL(10, pa.pos(0)[0]);
ASSERT_DOUBLES_EXACTLY_EQUAL(10, pa.pos(0)[1]);
ASSERT_DOUBLES_EXACTLY_EQUAL(10, pa.pos(0)[2]);
ASSERT_DOUBLES_EXACTLY_EQUAL(1 , pa.vel(0)[0]);
ASSERT_DOUBLES_EXACTLY_EQUAL(0 , pa.vel(0)[1]);
ASSERT_DOUBLES_EXACTLY_EQUAL(0 , pa.vel(0)[2]);
ASSERT_DOUBLES_EXACTLY_EQUAL(2 , pa.radius(0));
pa.add(openvdb::Vec3R(20,20,20), 3);
CPPUNIT_ASSERT_EQUAL(2, int(pa.size()));
ASSERT_DOUBLES_EXACTLY_EQUAL(20, pa.pos(1)[0]);
ASSERT_DOUBLES_EXACTLY_EQUAL(20, pa.pos(1)[1]);
ASSERT_DOUBLES_EXACTLY_EQUAL(20, pa.pos(1)[2]);
ASSERT_DOUBLES_EXACTLY_EQUAL(0 , pa.vel(1)[0]);
ASSERT_DOUBLES_EXACTLY_EQUAL(0 , pa.vel(1)[1]);
ASSERT_DOUBLES_EXACTLY_EQUAL(0 , pa.vel(1)[2]);
ASSERT_DOUBLES_EXACTLY_EQUAL(3 , pa.radius(1));
const float voxelSize = 0.5f, halfWidth = 4.0f;
openvdb::FloatGrid::Ptr ls = openvdb::createLevelSet<openvdb::FloatGrid>(voxelSize, halfWidth);
openvdb::CoordBBox bbox = pa.getBBox(*ls);
ASSERT_DOUBLES_EXACTLY_EQUAL((10-2)/voxelSize, bbox.min()[0]);
ASSERT_DOUBLES_EXACTLY_EQUAL((10-2)/voxelSize, bbox.min()[1]);
ASSERT_DOUBLES_EXACTLY_EQUAL((10-2)/voxelSize, bbox.min()[2]);
ASSERT_DOUBLES_EXACTLY_EQUAL((20+3)/voxelSize, bbox.max()[0]);
ASSERT_DOUBLES_EXACTLY_EQUAL((20+3)/voxelSize, bbox.max()[1]);
ASSERT_DOUBLES_EXACTLY_EQUAL((20+3)/voxelSize, bbox.max()[2]);
}
void
TestParticlesToLevelSet::testRasterizeSpheres()
{
MyParticleList pa;
pa.add(openvdb::Vec3R(10,10,10), 2);
pa.add(openvdb::Vec3R(20,20,20), 2);
// testing CSG
pa.add(openvdb::Vec3R(31.0,31,31), 5);
pa.add(openvdb::Vec3R(31.5,31,31), 5);
pa.add(openvdb::Vec3R(32.0,31,31), 5);
pa.add(openvdb::Vec3R(32.5,31,31), 5);
pa.add(openvdb::Vec3R(33.0,31,31), 5);
pa.add(openvdb::Vec3R(33.5,31,31), 5);
pa.add(openvdb::Vec3R(34.0,31,31), 5);
pa.add(openvdb::Vec3R(34.5,31,31), 5);
pa.add(openvdb::Vec3R(35.0,31,31), 5);
pa.add(openvdb::Vec3R(35.5,31,31), 5);
pa.add(openvdb::Vec3R(36.0,31,31), 5);
CPPUNIT_ASSERT_EQUAL(13, int(pa.size()));
const float voxelSize = 1.0f, halfWidth = 2.0f;
openvdb::FloatGrid::Ptr ls = openvdb::createLevelSet<openvdb::FloatGrid>(voxelSize, halfWidth);
openvdb::tools::ParticlesToLevelSet<openvdb::FloatGrid> raster(*ls);
raster.setGrainSize(1);//a value of zero disables threading
raster.rasterizeSpheres(pa);
raster.finalize();
//openvdb::FloatGrid::Ptr ls = raster.getSdfGrid();
//ls->tree().print(std::cout,4);
//this->writeGrid(ls, "testRasterizeSpheres");
ASSERT_DOUBLES_EXACTLY_EQUAL(halfWidth * voxelSize,
ls->tree().getValue(openvdb::Coord( 0, 0, 0)));
ASSERT_DOUBLES_EXACTLY_EQUAL( 2, ls->tree().getValue(openvdb::Coord( 6,10,10)));
ASSERT_DOUBLES_EXACTLY_EQUAL( 1, ls->tree().getValue(openvdb::Coord( 7,10,10)));
ASSERT_DOUBLES_EXACTLY_EQUAL( 0, ls->tree().getValue(openvdb::Coord( 8,10,10)));
ASSERT_DOUBLES_EXACTLY_EQUAL(-1, ls->tree().getValue(openvdb::Coord( 9,10,10)));
ASSERT_DOUBLES_EXACTLY_EQUAL(-2, ls->tree().getValue(openvdb::Coord(10,10,10)));
ASSERT_DOUBLES_EXACTLY_EQUAL(-1, ls->tree().getValue(openvdb::Coord(11,10,10)));
ASSERT_DOUBLES_EXACTLY_EQUAL( 0, ls->tree().getValue(openvdb::Coord(12,10,10)));
ASSERT_DOUBLES_EXACTLY_EQUAL( 1, ls->tree().getValue(openvdb::Coord(13,10,10)));
ASSERT_DOUBLES_EXACTLY_EQUAL( 2, ls->tree().getValue(openvdb::Coord(14,10,10)));
ASSERT_DOUBLES_EXACTLY_EQUAL( 2, ls->tree().getValue(openvdb::Coord(20,16,20)));
ASSERT_DOUBLES_EXACTLY_EQUAL( 1, ls->tree().getValue(openvdb::Coord(20,17,20)));
ASSERT_DOUBLES_EXACTLY_EQUAL( 0, ls->tree().getValue(openvdb::Coord(20,18,20)));
ASSERT_DOUBLES_EXACTLY_EQUAL(-1, ls->tree().getValue(openvdb::Coord(20,19,20)));
ASSERT_DOUBLES_EXACTLY_EQUAL(-2, ls->tree().getValue(openvdb::Coord(20,20,20)));
ASSERT_DOUBLES_EXACTLY_EQUAL(-1, ls->tree().getValue(openvdb::Coord(20,21,20)));
ASSERT_DOUBLES_EXACTLY_EQUAL( 0, ls->tree().getValue(openvdb::Coord(20,22,20)));
ASSERT_DOUBLES_EXACTLY_EQUAL( 1, ls->tree().getValue(openvdb::Coord(20,23,20)));
ASSERT_DOUBLES_EXACTLY_EQUAL( 2, ls->tree().getValue(openvdb::Coord(20,24,20)));
{// full but slow test of all voxels
openvdb::CoordBBox bbox = pa.getBBox(*ls);
bbox.expand(static_cast<int>(halfWidth)+1);
openvdb::Index64 count=0;
const float outside = ls->background(), inside = -outside;
const openvdb::Coord &min=bbox.min(), &max=bbox.max();
for (openvdb::Coord ijk=min; ijk[0]<max[0]; ++ijk[0]) {
for (ijk[1]=min[1]; ijk[1]<max[1]; ++ijk[1]) {
for (ijk[2]=min[2]; ijk[2]<max[2]; ++ijk[2]) {
const openvdb::Vec3d xyz = ls->indexToWorld(ijk.asVec3d());
double dist = (xyz-pa.pos(0)).length()-pa.radius(0);
for (int i = 1, s = int(pa.size()); i < s; ++i) {
dist=openvdb::math::Min(dist,(xyz-pa.pos(i)).length()-pa.radius(i));
}
const float val = ls->tree().getValue(ijk);
if (dist >= outside) {
CPPUNIT_ASSERT_DOUBLES_EQUAL(outside, val, 0.0001);
CPPUNIT_ASSERT(ls->tree().isValueOff(ijk));
} else if( dist <= inside ) {
CPPUNIT_ASSERT_DOUBLES_EQUAL(inside, val, 0.0001);
CPPUNIT_ASSERT(ls->tree().isValueOff(ijk));
} else {
CPPUNIT_ASSERT_DOUBLES_EQUAL( dist, val, 0.0001);
CPPUNIT_ASSERT(ls->tree().isValueOn(ijk));
++count;
}
}
}
}
//std::cerr << "\nExpected active voxel count = " << count
// << ", actual active voxle count = "
// << ls->activeVoxelCount() << std::endl;
CPPUNIT_ASSERT_EQUAL(count, ls->activeVoxelCount());
}
}
void
TestParticlesToLevelSet::testRasterizeSpheresAndId()
{
MyParticleList pa(0.5f);
pa.add(openvdb::Vec3R(10,10,10), 4);
pa.add(openvdb::Vec3R(20,20,20), 4);
// testing CSG
pa.add(openvdb::Vec3R(31.0,31,31),10);
pa.add(openvdb::Vec3R(31.5,31,31),10);
pa.add(openvdb::Vec3R(32.0,31,31),10);
pa.add(openvdb::Vec3R(32.5,31,31),10);
pa.add(openvdb::Vec3R(33.0,31,31),10);
pa.add(openvdb::Vec3R(33.5,31,31),10);
pa.add(openvdb::Vec3R(34.0,31,31),10);
pa.add(openvdb::Vec3R(34.5,31,31),10);
pa.add(openvdb::Vec3R(35.0,31,31),10);
pa.add(openvdb::Vec3R(35.5,31,31),10);
pa.add(openvdb::Vec3R(36.0,31,31),10);
CPPUNIT_ASSERT_EQUAL(13, int(pa.size()));
typedef openvdb::tools::ParticlesToLevelSet<openvdb::FloatGrid, openvdb::Index32> RasterT;
const float voxelSize = 1.0f, halfWidth = 2.0f;
openvdb::FloatGrid::Ptr ls = openvdb::createLevelSet<openvdb::FloatGrid>(voxelSize, halfWidth);
RasterT raster(*ls);
raster.setGrainSize(1);//a value of zero disables threading
raster.rasterizeSpheres(pa);
raster.finalize();
const RasterT::AttGridType::Ptr id = raster.attributeGrid();
int minVal = std::numeric_limits<int>::max(), maxVal = -minVal;
for (RasterT::AttGridType::ValueOnCIter i=id->cbeginValueOn(); i; ++i) {
minVal = openvdb::math::Min(minVal, int(*i));
maxVal = openvdb::math::Max(maxVal, int(*i));
}
CPPUNIT_ASSERT_EQUAL(0 , minVal);
CPPUNIT_ASSERT_EQUAL(12, maxVal);
//grid.tree().print(std::cout,4);
//id->print(std::cout,4);
//this->writeGrid(ls, "testRasterizeSpheres");
ASSERT_DOUBLES_EXACTLY_EQUAL(halfWidth * voxelSize,
ls->tree().getValue(openvdb::Coord( 0, 0, 0)));
ASSERT_DOUBLES_EXACTLY_EQUAL( 2, ls->tree().getValue(openvdb::Coord( 6,10,10)));
ASSERT_DOUBLES_EXACTLY_EQUAL( 1, ls->tree().getValue(openvdb::Coord( 7,10,10)));
ASSERT_DOUBLES_EXACTLY_EQUAL( 0, ls->tree().getValue(openvdb::Coord( 8,10,10)));
ASSERT_DOUBLES_EXACTLY_EQUAL(-1, ls->tree().getValue(openvdb::Coord( 9,10,10)));
ASSERT_DOUBLES_EXACTLY_EQUAL(-2, ls->tree().getValue(openvdb::Coord(10,10,10)));
ASSERT_DOUBLES_EXACTLY_EQUAL(-1, ls->tree().getValue(openvdb::Coord(11,10,10)));
ASSERT_DOUBLES_EXACTLY_EQUAL( 0, ls->tree().getValue(openvdb::Coord(12,10,10)));
ASSERT_DOUBLES_EXACTLY_EQUAL( 1, ls->tree().getValue(openvdb::Coord(13,10,10)));
ASSERT_DOUBLES_EXACTLY_EQUAL( 2, ls->tree().getValue(openvdb::Coord(14,10,10)));
ASSERT_DOUBLES_EXACTLY_EQUAL( 2, ls->tree().getValue(openvdb::Coord(20,16,20)));
ASSERT_DOUBLES_EXACTLY_EQUAL( 1, ls->tree().getValue(openvdb::Coord(20,17,20)));
ASSERT_DOUBLES_EXACTLY_EQUAL( 0, ls->tree().getValue(openvdb::Coord(20,18,20)));
ASSERT_DOUBLES_EXACTLY_EQUAL(-1, ls->tree().getValue(openvdb::Coord(20,19,20)));
ASSERT_DOUBLES_EXACTLY_EQUAL(-2, ls->tree().getValue(openvdb::Coord(20,20,20)));
ASSERT_DOUBLES_EXACTLY_EQUAL(-1, ls->tree().getValue(openvdb::Coord(20,21,20)));
ASSERT_DOUBLES_EXACTLY_EQUAL( 0, ls->tree().getValue(openvdb::Coord(20,22,20)));
ASSERT_DOUBLES_EXACTLY_EQUAL( 1, ls->tree().getValue(openvdb::Coord(20,23,20)));
ASSERT_DOUBLES_EXACTLY_EQUAL( 2, ls->tree().getValue(openvdb::Coord(20,24,20)));
{// full but slow test of all voxels
openvdb::CoordBBox bbox = pa.getBBox(*ls);
bbox.expand(static_cast<int>(halfWidth)+1);
openvdb::Index64 count = 0;
const float outside = ls->background(), inside = -outside;
const openvdb::Coord &min=bbox.min(), &max=bbox.max();
for (openvdb::Coord ijk=min; ijk[0]<max[0]; ++ijk[0]) {
for (ijk[1]=min[1]; ijk[1]<max[1]; ++ijk[1]) {
for (ijk[2]=min[2]; ijk[2]<max[2]; ++ijk[2]) {
const openvdb::Vec3d xyz = ls->indexToWorld(ijk.asVec3d());
double dist = (xyz-pa.pos(0)).length()-pa.radius(0);
openvdb::Index32 k =0;
for (int i = 1, s = int(pa.size()); i < s; ++i) {
double d = (xyz-pa.pos(i)).length()-pa.radius(i);
if (d<dist) {
k = openvdb::Index32(i);
dist = d;
}
}//loop over particles
const float val = ls->tree().getValue(ijk);
openvdb::Index32 m = id->tree().getValue(ijk);
if (dist >= outside) {
CPPUNIT_ASSERT_DOUBLES_EQUAL(outside, val, 0.0001);
CPPUNIT_ASSERT(ls->tree().isValueOff(ijk));
//CPPUNIT_ASSERT_EQUAL(openvdb::util::INVALID_IDX, m);
CPPUNIT_ASSERT(id->tree().isValueOff(ijk));
} else if( dist <= inside ) {
CPPUNIT_ASSERT_DOUBLES_EQUAL(inside, val, 0.0001);
CPPUNIT_ASSERT(ls->tree().isValueOff(ijk));
//CPPUNIT_ASSERT_EQUAL(openvdb::util::INVALID_IDX, m);
CPPUNIT_ASSERT(id->tree().isValueOff(ijk));
} else {
CPPUNIT_ASSERT_DOUBLES_EQUAL( dist, val, 0.0001);
CPPUNIT_ASSERT(ls->tree().isValueOn(ijk));
CPPUNIT_ASSERT_EQUAL(k, m);
CPPUNIT_ASSERT(id->tree().isValueOn(ijk));
++count;
}
}
}
}
//std::cerr << "\nExpected active voxel count = " << count
// << ", actual active voxle count = "
// << ls->activeVoxelCount() << std::endl;
CPPUNIT_ASSERT_EQUAL(count, ls->activeVoxelCount());
}
}
/// This is not really a conventional unit-test since the result of
/// the tests are written to a file and need to be visually verified!
void
TestParticlesToLevelSet::testRasterizeTrails()
{
const float voxelSize = 1.0f, halfWidth = 2.0f;
openvdb::FloatGrid::Ptr ls = openvdb::createLevelSet<openvdb::FloatGrid>(voxelSize, halfWidth);
MyParticleList pa(1,5);
// This particle radius = 1 < 1.5 i.e. it's below the Nyquist frequency and hence ignored
pa.add(openvdb::Vec3R( 0, 0, 0), 1, openvdb::Vec3R( 0, 1, 0));
pa.add(openvdb::Vec3R(-10,-10,-10), 2, openvdb::Vec3R( 2, 0, 0));
pa.add(openvdb::Vec3R( 10, 10, 10), 3, openvdb::Vec3R( 0, 1, 0));
pa.add(openvdb::Vec3R( 0, 0, 0), 6, openvdb::Vec3R( 0, 0,-5));
pa.add(openvdb::Vec3R( 20, 0, 0), 2, openvdb::Vec3R( 0, 0, 0));
openvdb::tools::ParticlesToLevelSet<openvdb::FloatGrid> raster(*ls);
raster.rasterizeTrails(pa, 0.75);//scale offset between two instances
//ls->tree().print(std::cout, 4);
//this->writeGrid(ls, "testRasterizeTrails");
}
void
TestParticlesToLevelSet::testRasterizeTrailsAndId()
{
MyParticleList pa(1,5);
// This particle radius = 1 < 1.5 i.e. it's below the Nyquist frequency and hence ignored
pa.add(openvdb::Vec3R( 0, 0, 0), 1, openvdb::Vec3R( 0, 1, 0));
pa.add(openvdb::Vec3R(-10,-10,-10), 2, openvdb::Vec3R( 2, 0, 0));
pa.add(openvdb::Vec3R( 10, 10, 10), 3, openvdb::Vec3R( 0, 1, 0));
pa.add(openvdb::Vec3R( 0, 0, 0), 6, openvdb::Vec3R( 0, 0,-5));
typedef openvdb::tools::ParticlesToLevelSet<openvdb::FloatGrid, openvdb::Index> RasterT;
const float voxelSize = 1.0f, halfWidth = 2.0f;
openvdb::FloatGrid::Ptr ls = openvdb::createLevelSet<openvdb::FloatGrid>(voxelSize, halfWidth);
RasterT raster(*ls);
raster.rasterizeTrails(pa, 0.75);//scale offset between two instances
raster.finalize();
const RasterT::AttGridType::Ptr id = raster.attributeGrid();
CPPUNIT_ASSERT(!ls->empty());
CPPUNIT_ASSERT(!id->empty());
CPPUNIT_ASSERT_EQUAL(ls->activeVoxelCount(),id->activeVoxelCount());
int min = std::numeric_limits<int>::max(), max = -min;
for (RasterT::AttGridType::ValueOnCIter i=id->cbeginValueOn(); i; ++i) {
min = openvdb::math::Min(min, int(*i));
max = openvdb::math::Max(max, int(*i));
}
CPPUNIT_ASSERT_EQUAL(1, min);//first particle is ignored because of its small rdadius!
CPPUNIT_ASSERT_EQUAL(3, max);
//ls->tree().print(std::cout, 4);
//this->writeGrid(ls, "testRasterizeTrails");
}
// 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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