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/*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* The Original Code is Copyright (C) 2015 Blender Foundation.
* All rights reserved.
*/
#include "openvdb_dense_convert.h"
#include <openvdb/tools/ValueTransformer.h> /* for tools::foreach */
namespace internal {
openvdb::Mat4R convertMatrix(const float mat[4][4])
{
return openvdb::Mat4R(mat[0][0],
mat[0][1],
mat[0][2],
mat[0][3],
mat[1][0],
mat[1][1],
mat[1][2],
mat[1][3],
mat[2][0],
mat[2][1],
mat[2][2],
mat[2][3],
mat[3][0],
mat[3][1],
mat[3][2],
mat[3][3]);
}
class MergeScalarGrids {
typedef openvdb::FloatTree ScalarTree;
openvdb::tree::ValueAccessor<const ScalarTree> m_acc_x, m_acc_y, m_acc_z;
public:
MergeScalarGrids(const ScalarTree *x_tree, const ScalarTree *y_tree, const ScalarTree *z_tree)
: m_acc_x(*x_tree), m_acc_y(*y_tree), m_acc_z(*z_tree)
{
}
MergeScalarGrids(const MergeScalarGrids &other)
: m_acc_x(other.m_acc_x), m_acc_y(other.m_acc_y), m_acc_z(other.m_acc_z)
{
}
void operator()(const openvdb::Vec3STree::ValueOnIter &it) const
{
using namespace openvdb;
const math::Coord xyz = it.getCoord();
float x = m_acc_x.getValue(xyz);
float y = m_acc_y.getValue(xyz);
float z = m_acc_z.getValue(xyz);
it.setValue(math::Vec3s(x, y, z));
}
};
openvdb::GridBase *OpenVDB_export_vector_grid(OpenVDBWriter *writer,
const openvdb::Name &name,
const float *data_x,
const float *data_y,
const float *data_z,
const int res[3],
float fluid_mat[4][4],
openvdb::VecType vec_type,
const bool is_color,
const float clipping,
const openvdb::FloatGrid *mask)
{
using namespace openvdb;
math::CoordBBox bbox(Coord(0), Coord(res[0] - 1, res[1] - 1, res[2] - 1));
Mat4R mat = convertMatrix(fluid_mat);
math::Transform::Ptr transform = math::Transform::createLinearTransform(mat);
FloatGrid::Ptr grid[3];
grid[0] = FloatGrid::create(0.0f);
tools::Dense<const float, tools::LayoutXYZ> dense_grid_x(bbox, data_x);
tools::copyFromDense(dense_grid_x, grid[0]->tree(), clipping);
grid[1] = FloatGrid::create(0.0f);
tools::Dense<const float, tools::LayoutXYZ> dense_grid_y(bbox, data_y);
tools::copyFromDense(dense_grid_y, grid[1]->tree(), clipping);
grid[2] = FloatGrid::create(0.0f);
tools::Dense<const float, tools::LayoutXYZ> dense_grid_z(bbox, data_z);
tools::copyFromDense(dense_grid_z, grid[2]->tree(), clipping);
Vec3SGrid::Ptr vecgrid = Vec3SGrid::create(Vec3s(0.0f));
/* Activate voxels in the vector grid based on the scalar grids to ensure
* thread safety later on */
for (int i = 0; i < 3; ++i) {
vecgrid->tree().topologyUnion(grid[i]->tree());
}
MergeScalarGrids op(&(grid[0]->tree()), &(grid[1]->tree()), &(grid[2]->tree()));
tools::foreach (vecgrid->beginValueOn(), op, true, false);
vecgrid->setTransform(transform);
/* Avoid clipping against an empty grid. */
if (mask && !mask->tree().empty()) {
vecgrid = tools::clip(*vecgrid, *mask);
}
vecgrid->setName(name);
vecgrid->setIsInWorldSpace(false);
vecgrid->setVectorType(vec_type);
vecgrid->insertMeta("is_color", BoolMetadata(is_color));
vecgrid->setGridClass(GRID_STAGGERED);
writer->insert(vecgrid);
return vecgrid.get();
}
void OpenVDB_import_grid_vector(OpenVDBReader *reader,
const openvdb::Name &name,
float **data_x,
float **data_y,
float **data_z,
const int res[3])
{
using namespace openvdb;
if (!reader->hasGrid(name)) {
std::fprintf(stderr, "OpenVDB grid %s not found in file!\n", name.c_str());
memset(*data_x, 0, sizeof(float) * res[0] * res[1] * res[2]);
memset(*data_y, 0, sizeof(float) * res[0] * res[1] * res[2]);
memset(*data_z, 0, sizeof(float) * res[0] * res[1] * res[2]);
return;
}
Vec3SGrid::Ptr vgrid = gridPtrCast<Vec3SGrid>(reader->getGrid(name));
Vec3SGrid::ConstAccessor acc = vgrid->getConstAccessor();
math::Coord xyz;
int &x = xyz[0], &y = xyz[1], &z = xyz[2];
size_t index = 0;
for (z = 0; z < res[2]; ++z) {
for (y = 0; y < res[1]; ++y) {
for (x = 0; x < res[0]; ++x, ++index) {
math::Vec3s value = acc.getValue(xyz);
(*data_x)[index] = value.x();
(*data_y)[index] = value.y();
(*data_z)[index] = value.z();
}
}
}
}
openvdb::Name do_name_versionning(const openvdb::Name &name)
{
openvdb::Name temp_name = name;
if (temp_name.find("_low", temp_name.size() - 4, 4) == temp_name.size() - 4) {
return temp_name.replace(temp_name.size() - 4, 4, " low");
}
if (temp_name.find("_old", temp_name.size() - 4, 4) == temp_name.size() - 4) {
return temp_name.replace(temp_name.size() - 4, 4, " old");
}
return temp_name;
}
} /* namespace internal */
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