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Diffstat (limited to 'intern/openvdb/intern/openvdb_dense_convert.cc')
| -rw-r--r-- | intern/openvdb/intern/openvdb_dense_convert.cc | 167 |
1 files changed, 167 insertions, 0 deletions
diff --git a/intern/openvdb/intern/openvdb_dense_convert.cc b/intern/openvdb/intern/openvdb_dense_convert.cc new file mode 100644 index 00000000000..d4f62776988 --- /dev/null +++ b/intern/openvdb/intern/openvdb_dense_convert.cc @@ -0,0 +1,167 @@ +/* + * ***** BEGIN GPL LICENSE BLOCK ***** + * + * 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. + * + * The Original Code is: all of this file. + * + * Contributor(s): Kevin Dietrich + * + * ***** END GPL LICENSE BLOCK ***** + */ + +#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 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(), TOLERANCE); + + 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(), TOLERANCE); + + 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(), TOLERANCE); + + 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); + + if (mask) { + 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(); + } + } + } +} + +} /* namespace internal */ |