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Diffstat (limited to 'source/blender/alembic/intern/abc_mesh.cc')
| -rw-r--r-- | source/blender/alembic/intern/abc_mesh.cc | 1213 |
1 files changed, 1213 insertions, 0 deletions
diff --git a/source/blender/alembic/intern/abc_mesh.cc b/source/blender/alembic/intern/abc_mesh.cc new file mode 100644 index 00000000000..f1c7b6b3aa3 --- /dev/null +++ b/source/blender/alembic/intern/abc_mesh.cc @@ -0,0 +1,1213 @@ +/* + * ***** 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. + * + * Contributor(s): Esteban Tovagliari, Cedric Paille, Kevin Dietrich + * + * ***** END GPL LICENSE BLOCK ***** + */ + +#include "abc_mesh.h" + +#include <algorithm> + +#include "abc_transform.h" +#include "abc_util.h" + +extern "C" { +#include "DNA_material_types.h" +#include "DNA_mesh_types.h" +#include "DNA_modifier_types.h" +#include "DNA_object_fluidsim.h" +#include "DNA_object_types.h" + +#include "BLI_math_geom.h" +#include "BLI_string.h" + +#include "BKE_depsgraph.h" +#include "BKE_DerivedMesh.h" +#include "BKE_main.h" +#include "BKE_material.h" +#include "BKE_mesh.h" +#include "BKE_modifier.h" +#include "BKE_object.h" + +#include "WM_api.h" +#include "WM_types.h" + +#include "ED_mesh.h" +} + +using Alembic::Abc::FloatArraySample; +using Alembic::Abc::ICompoundProperty; +using Alembic::Abc::Int32ArraySample; +using Alembic::Abc::Int32ArraySamplePtr; +using Alembic::Abc::P3fArraySamplePtr; +using Alembic::Abc::V2fArraySample; +using Alembic::Abc::V3fArraySample; +using Alembic::Abc::C4fArraySample; + +using Alembic::AbcGeom::IFaceSet; +using Alembic::AbcGeom::IFaceSetSchema; +using Alembic::AbcGeom::IObject; +using Alembic::AbcGeom::IPolyMesh; +using Alembic::AbcGeom::IPolyMeshSchema; +using Alembic::AbcGeom::ISampleSelector; +using Alembic::AbcGeom::ISubD; +using Alembic::AbcGeom::ISubDSchema; +using Alembic::AbcGeom::IV2fGeomParam; + +using Alembic::AbcGeom::OArrayProperty; +using Alembic::AbcGeom::OBoolProperty; +using Alembic::AbcGeom::OC3fArrayProperty; +using Alembic::AbcGeom::OC3fGeomParam; +using Alembic::AbcGeom::OC4fGeomParam; +using Alembic::AbcGeom::OCompoundProperty; +using Alembic::AbcGeom::OFaceSet; +using Alembic::AbcGeom::OFaceSetSchema; +using Alembic::AbcGeom::OFloatGeomParam; +using Alembic::AbcGeom::OInt32GeomParam; +using Alembic::AbcGeom::ON3fArrayProperty; +using Alembic::AbcGeom::ON3fGeomParam; +using Alembic::AbcGeom::OPolyMesh; +using Alembic::AbcGeom::OPolyMeshSchema; +using Alembic::AbcGeom::OSubD; +using Alembic::AbcGeom::OSubDSchema; +using Alembic::AbcGeom::OV2fGeomParam; +using Alembic::AbcGeom::OV3fGeomParam; + +using Alembic::AbcGeom::kFacevaryingScope; +using Alembic::AbcGeom::kVaryingScope; +using Alembic::AbcGeom::kVertexScope; +using Alembic::AbcGeom::kWrapExisting; +using Alembic::AbcGeom::UInt32ArraySample; +using Alembic::AbcGeom::N3fArraySamplePtr; +using Alembic::AbcGeom::IN3fGeomParam; + +/* ************************************************************************** */ + +/* NOTE: Alembic's polygon winding order is clockwise, to match with Renderman. */ + +static void get_vertices(DerivedMesh *dm, std::vector<Imath::V3f> &points) +{ + points.clear(); + points.resize(dm->getNumVerts(dm)); + + MVert *verts = dm->getVertArray(dm); + + for (int i = 0, e = dm->getNumVerts(dm); i < e; ++i) { + copy_zup_yup(points[i].getValue(), verts[i].co); + } +} + +static void get_topology(DerivedMesh *dm, + std::vector<int32_t> &poly_verts, + std::vector<int32_t> &loop_counts, + bool &smooth_normal) +{ + const int num_poly = dm->getNumPolys(dm); + const int num_loops = dm->getNumLoops(dm); + MLoop *mloop = dm->getLoopArray(dm); + MPoly *mpoly = dm->getPolyArray(dm); + + poly_verts.clear(); + loop_counts.clear(); + poly_verts.reserve(num_loops); + loop_counts.reserve(num_poly); + + /* NOTE: data needs to be written in the reverse order. */ + for (int i = 0; i < num_poly; ++i) { + MPoly &poly = mpoly[i]; + loop_counts.push_back(poly.totloop); + + smooth_normal |= ((poly.flag & ME_SMOOTH) != 0); + + MLoop *loop = mloop + poly.loopstart + (poly.totloop - 1); + + for (int j = 0; j < poly.totloop; ++j, --loop) { + poly_verts.push_back(loop->v); + } + } +} + +static void get_material_indices(DerivedMesh *dm, std::vector<int32_t> &indices) +{ + indices.clear(); + indices.reserve(dm->getNumTessFaces(dm)); + + MPoly *mpolys = dm->getPolyArray(dm); + + for (int i = 1, e = dm->getNumPolys(dm); i < e; ++i) { + MPoly *mpoly = &mpolys[i]; + indices.push_back(mpoly->mat_nr); + } +} + +static void get_creases(DerivedMesh *dm, + std::vector<int32_t> &indices, + std::vector<int32_t> &lengths, + std::vector<float> &sharpnesses) +{ + const float factor = 1.0f / 255.0f; + + indices.clear(); + lengths.clear(); + sharpnesses.clear(); + + MEdge *edge = dm->getEdgeArray(dm); + + for (int i = 0, e = dm->getNumEdges(dm); i < e; ++i) { + const float sharpness = static_cast<float>(edge[i].crease) * factor; + + if (sharpness != 0.0f) { + indices.push_back(edge[i].v1); + indices.push_back(edge[i].v2); + sharpnesses.push_back(sharpness); + } + } + + lengths.resize(sharpnesses.size(), 2); +} + +static void get_vertex_normals(DerivedMesh *dm, std::vector<Imath::V3f> &normals) +{ + normals.clear(); + normals.resize(dm->getNumVerts(dm)); + + MVert *verts = dm->getVertArray(dm); + float no[3]; + + for (int i = 0, e = dm->getNumVerts(dm); i < e; ++i) { + normal_short_to_float_v3(no, verts[i].no); + copy_zup_yup(normals[i].getValue(), no); + } +} + +static void get_loop_normals(DerivedMesh *dm, std::vector<Imath::V3f> &normals) +{ + MPoly *mpoly = dm->getPolyArray(dm); + MPoly *mp = mpoly; + + MLoop *mloop = dm->getLoopArray(dm); + MLoop *ml = mloop; + + MVert *verts = dm->getVertArray(dm); + + const float (*lnors)[3] = static_cast<float(*)[3]>(dm->getLoopDataArray(dm, CD_NORMAL)); + + normals.clear(); + normals.resize(dm->getNumLoops(dm)); + + unsigned loop_index = 0; + + /* NOTE: data needs to be written in the reverse order. */ + + if (lnors) { + for (int i = 0, e = dm->getNumPolys(dm); i < e; ++i, ++mp) { + ml = mloop + mp->loopstart + (mp->totloop - 1); + + for (int j = 0; j < mp->totloop; --ml, ++j, ++loop_index) { + const int index = ml->v; + copy_zup_yup(normals[loop_index].getValue(), lnors[index]); + } + } + } + else { + float no[3]; + + for (int i = 0, e = dm->getNumPolys(dm); i < e; ++i, ++mp) { + ml = mloop + mp->loopstart + (mp->totloop - 1); + + /* Flat shaded, use common normal for all verts. */ + if ((mp->flag & ME_SMOOTH) == 0) { + BKE_mesh_calc_poly_normal(mp, ml - (mp->totloop - 1), verts, no); + + for (int j = 0; j < mp->totloop; --ml, ++j, ++loop_index) { + copy_zup_yup(normals[loop_index].getValue(), no); + } + } + else { + /* Smooth shaded, use individual vert normals. */ + for (int j = 0; j < mp->totloop; --ml, ++j, ++loop_index) { + normal_short_to_float_v3(no, verts[ml->v].no); + copy_zup_yup(normals[loop_index].getValue(), no); + } + } + } + } +} + +/* *************** Modifiers *************** */ + +/* check if the mesh is a subsurf, ignoring disabled modifiers and + * displace if it's after subsurf. */ +static ModifierData *get_subsurf_modifier(Scene *scene, Object *ob) +{ + ModifierData *md = static_cast<ModifierData *>(ob->modifiers.last); + + for (; md; md = md->prev) { + if (!modifier_isEnabled(scene, md, eModifierMode_Render)) { + continue; + } + + if (md->type == eModifierType_Subsurf) { + SubsurfModifierData *smd = reinterpret_cast<SubsurfModifierData*>(md); + + if (smd->subdivType == ME_CC_SUBSURF) { + return md; + } + } + + /* mesh is not a subsurf. break */ + if ((md->type != eModifierType_Displace) && (md->type != eModifierType_ParticleSystem)) { + return NULL; + } + } + + return NULL; +} + +static ModifierData *get_liquid_sim_modifier(Scene *scene, Object *ob) +{ + ModifierData *md = modifiers_findByType(ob, eModifierType_Fluidsim); + + if (md && (modifier_isEnabled(scene, md, eModifierMode_Render))) { + FluidsimModifierData *fsmd = reinterpret_cast<FluidsimModifierData *>(md); + + if (fsmd->fss && fsmd->fss->type == OB_FLUIDSIM_DOMAIN) { + return md; + } + } + + return NULL; +} + +/* ************************************************************************** */ + +AbcMeshWriter::AbcMeshWriter(Scene *scene, + Object *ob, + AbcTransformWriter *parent, + uint32_t time_sampling, + ExportSettings &settings) + : AbcObjectWriter(scene, ob, time_sampling, settings, parent) +{ + m_is_animated = isAnimated(); + m_subsurf_mod = NULL; + m_has_per_face_materials = false; + m_is_subd = false; + + /* If the object is static, use the default static time sampling. */ + if (!m_is_animated) { + time_sampling = 0; + } + + if (!m_settings.apply_subdiv) { + m_subsurf_mod = get_subsurf_modifier(m_scene, m_object); + m_is_subd = (m_subsurf_mod != NULL); + } + + m_is_liquid = (get_liquid_sim_modifier(m_scene, m_object) != NULL); + + while (parent->alembicXform().getChildHeader(m_name)) { + m_name.append("_"); + } + + if (m_settings.use_subdiv_schema && m_is_subd) { + OSubD subd(parent->alembicXform(), m_name, m_time_sampling); + m_subdiv_schema = subd.getSchema(); + } + else { + OPolyMesh mesh(parent->alembicXform(), m_name, m_time_sampling); + m_mesh_schema = mesh.getSchema(); + + OCompoundProperty typeContainer = m_mesh_schema.getUserProperties(); + OBoolProperty type(typeContainer, "meshtype"); + type.set(m_is_subd); + } +} + +AbcMeshWriter::~AbcMeshWriter() +{ + if (m_subsurf_mod) { + m_subsurf_mod->mode &= ~eModifierMode_DisableTemporary; + } +} + +bool AbcMeshWriter::isAnimated() const +{ + /* Check if object has shape keys. */ + Mesh *me = static_cast<Mesh *>(m_object->data); + + if (me->key) { + return true; + } + + /* Test modifiers. */ + ModifierData *md = static_cast<ModifierData *>(m_object->modifiers.first); + + while (md) { + if (md->type != eModifierType_Subsurf) { + return true; + } + + md = md->next; + } + + return false; +} + +void AbcMeshWriter::do_write() +{ + /* We have already stored a sample for this object. */ + if (!m_first_frame && !m_is_animated) + return; + + DerivedMesh *dm = getFinalMesh(); + + try { + if (m_settings.use_subdiv_schema && m_subdiv_schema.valid()) { + writeSubD(dm); + } + else { + writeMesh(dm); + } + + freeMesh(dm); + } + catch (...) { + freeMesh(dm); + throw; + } +} + +void AbcMeshWriter::writeMesh(DerivedMesh *dm) +{ + std::vector<Imath::V3f> points, normals; + std::vector<int32_t> poly_verts, loop_counts; + + bool smooth_normal = false; + + get_vertices(dm, points); + get_topology(dm, poly_verts, loop_counts, smooth_normal); + + if (m_first_frame) { + writeCommonData(dm, m_mesh_schema); + } + + m_mesh_sample = OPolyMeshSchema::Sample(V3fArraySample(points), + Int32ArraySample(poly_verts), + Int32ArraySample(loop_counts)); + + UVSample sample; + if (m_settings.export_uvs) { + const char *name = get_uv_sample(sample, m_custom_data_config, &dm->loopData); + + if (!sample.indices.empty() && !sample.uvs.empty()) { + OV2fGeomParam::Sample uv_sample; + uv_sample.setVals(V2fArraySample(sample.uvs)); + uv_sample.setIndices(UInt32ArraySample(sample.indices)); + uv_sample.setScope(kFacevaryingScope); + + m_mesh_schema.setUVSourceName(name); + m_mesh_sample.setUVs(uv_sample); + } + + write_custom_data(m_mesh_schema.getArbGeomParams(), m_custom_data_config, &dm->loopData, CD_MLOOPUV); + } + + if (m_settings.export_normals) { + if (smooth_normal) { + get_loop_normals(dm, normals); + } + else { + get_vertex_normals(dm, normals); + } + + ON3fGeomParam::Sample normals_sample; + if (!normals.empty()) { + normals_sample.setScope((smooth_normal) ? kFacevaryingScope : kVertexScope); + normals_sample.setVals(V3fArraySample(normals)); + } + + m_mesh_sample.setNormals(normals_sample); + } + + if (m_is_liquid) { + std::vector<Imath::V3f> velocities; + getVelocities(dm, velocities); + + m_mesh_sample.setVelocities(V3fArraySample(velocities)); + } + + m_mesh_sample.setSelfBounds(bounds()); + + m_mesh_schema.set(m_mesh_sample); + + writeArbGeoParams(dm); +} + +void AbcMeshWriter::writeSubD(DerivedMesh *dm) +{ + std::vector<float> crease_sharpness; + std::vector<Imath::V3f> points; + std::vector<int32_t> poly_verts, loop_counts; + std::vector<int32_t> crease_indices, crease_lengths; + + bool smooth_normal = false; + + get_vertices(dm, points); + get_topology(dm, poly_verts, loop_counts, smooth_normal); + get_creases(dm, crease_indices, crease_lengths, crease_sharpness); + + if (m_first_frame) { + /* create materials' face_sets */ + writeCommonData(dm, m_subdiv_schema); + } + + m_subdiv_sample = OSubDSchema::Sample(V3fArraySample(points), + Int32ArraySample(poly_verts), + Int32ArraySample(loop_counts)); + + UVSample sample; + if (m_settings.export_uvs) { + const char *name = get_uv_sample(sample, m_custom_data_config, &dm->loopData); + + if (!sample.indices.empty() && !sample.uvs.empty()) { + OV2fGeomParam::Sample uv_sample; + uv_sample.setVals(V2fArraySample(sample.uvs)); + uv_sample.setIndices(UInt32ArraySample(sample.indices)); + uv_sample.setScope(kFacevaryingScope); + + m_subdiv_schema.setUVSourceName(name); + m_subdiv_sample.setUVs(uv_sample); + } + + write_custom_data(m_subdiv_schema.getArbGeomParams(), m_custom_data_config, &dm->loopData, CD_MLOOPUV); + } + + if (!crease_indices.empty()) { + m_subdiv_sample.setCreaseIndices(Int32ArraySample(crease_indices)); + m_subdiv_sample.setCreaseLengths(Int32ArraySample(crease_lengths)); + m_subdiv_sample.setCreaseSharpnesses(FloatArraySample(crease_sharpness)); + } + + m_subdiv_sample.setSelfBounds(bounds()); + m_subdiv_schema.set(m_subdiv_sample); + + writeArbGeoParams(dm); +} + +template <typename Schema> +void AbcMeshWriter::writeCommonData(DerivedMesh *dm, Schema &schema) +{ + std::map< std::string, std::vector<int32_t> > geo_groups; + getGeoGroups(dm, geo_groups); + + std::map< std::string, std::vector<int32_t> >::iterator it; + for (it = geo_groups.begin(); it != geo_groups.end(); ++it) { + OFaceSet face_set = schema.createFaceSet(it->first); + OFaceSetSchema::Sample samp; + samp.setFaces(Int32ArraySample(it->second)); + face_set.getSchema().set(samp); + } +} + +DerivedMesh *AbcMeshWriter::getFinalMesh() +{ + /* We don't want subdivided mesh data */ + if (m_subsurf_mod) { + m_subsurf_mod->mode |= eModifierMode_DisableTemporary; + } + + DerivedMesh *dm = mesh_create_derived_render(m_scene, m_object, CD_MASK_MESH); + + if (m_subsurf_mod) { + m_subsurf_mod->mode &= ~eModifierMode_DisableTemporary; + } + + m_custom_data_config.pack_uvs = m_settings.pack_uv; + m_custom_data_config.mpoly = dm->getPolyArray(dm); + m_custom_data_config.mloop = dm->getLoopArray(dm); + m_custom_data_config.totpoly = dm->getNumPolys(dm); + m_custom_data_config.totloop = dm->getNumLoops(dm); + m_custom_data_config.totvert = dm->getNumVerts(dm); + + return dm; +} + +void AbcMeshWriter::freeMesh(DerivedMesh *dm) +{ + dm->release(dm); +} + +void AbcMeshWriter::writeArbGeoParams(DerivedMesh *dm) +{ + if (m_is_liquid) { + /* We don't need anything more for liquid meshes. */ + return; + } + + if (m_settings.export_vcols) { + if (m_subdiv_schema.valid()) { + write_custom_data(m_subdiv_schema.getArbGeomParams(), m_custom_data_config, &dm->loopData, CD_MLOOPCOL); + } + else { + write_custom_data(m_mesh_schema.getArbGeomParams(), m_custom_data_config, &dm->loopData, CD_MLOOPCOL); + } + } + + if (m_first_frame && m_has_per_face_materials) { + std::vector<int32_t> material_indices; + + if (m_settings.export_face_sets) { + get_material_indices(dm, material_indices); + + OFaceSetSchema::Sample samp; + samp.setFaces(Int32ArraySample(material_indices)); + m_face_set.getSchema().set(samp); + } + } +} + +void AbcMeshWriter::getVelocities(DerivedMesh *dm, std::vector<Imath::V3f> &vels) +{ + const int totverts = dm->getNumVerts(dm); + + vels.clear(); + vels.resize(totverts); + + ModifierData *md = get_liquid_sim_modifier(m_scene, m_object); + FluidsimModifierData *fmd = reinterpret_cast<FluidsimModifierData *>(md); + FluidsimSettings *fss = fmd->fss; + + if (fss->meshVelocities) { + float *mesh_vels = reinterpret_cast<float *>(fss->meshVelocities); + + for (int i = 0; i < totverts; ++i) { + copy_zup_yup(vels[i].getValue(), mesh_vels); + mesh_vels += 3; + } + } + else { + std::fill(vels.begin(), vels.end(), Imath::V3f(0.0f)); + } +} + +void AbcMeshWriter::getGeoGroups( + DerivedMesh *dm, + std::map<std::string, std::vector<int32_t> > &geo_groups) +{ + const int num_poly = dm->getNumPolys(dm); + MPoly *polygons = dm->getPolyArray(dm); + + for (int i = 0; i < num_poly; ++i) { + MPoly ¤t_poly = polygons[i]; + short mnr = current_poly.mat_nr; + + Material *mat = give_current_material(m_object, mnr + 1); + + if (!mat) { + continue; + } + + std::string name = get_id_name(&mat->id); + + if (geo_groups.find(name) == geo_groups.end()) { + std::vector<int32_t> faceArray; + geo_groups[name] = faceArray; + } + + geo_groups[name].push_back(i); + } + + if (geo_groups.size() == 0) { + Material *mat = give_current_material(m_object, 1); + + std::string name = (mat) ? get_id_name(&mat->id) : "default"; + + std::vector<int32_t> faceArray; + + for (int i = 0, e = dm->getNumTessFaces(dm); i < e; ++i) { + faceArray.push_back(i); + } + + geo_groups[name] = faceArray; + } +} + +/* ************************************************************************** */ + +/* Some helpers for mesh generation */ +namespace utils { + +void mesh_add_verts(Mesh *mesh, size_t len) +{ + if (len == 0) { + return; + } + + const int totvert = mesh->totvert + len; + CustomData vdata; + CustomData_copy(&mesh->vdata, &vdata, CD_MASK_MESH, CD_DEFAULT, totvert); + CustomData_copy_data(&mesh->vdata, &vdata, 0, 0, mesh->totvert); + + if (!CustomData_has_layer(&vdata, CD_MVERT)) { + CustomData_add_layer(&vdata, CD_MVERT, CD_CALLOC, NULL, totvert); + } + + CustomData_free(&mesh->vdata, mesh->totvert); + mesh->vdata = vdata; + BKE_mesh_update_customdata_pointers(mesh, false); + + mesh->totvert = totvert; +} + +static void mesh_add_mloops(Mesh *mesh, size_t len) +{ + if (len == 0) { + return; + } + + /* new face count */ + const int totloops = mesh->totloop + len; + + CustomData ldata; + CustomData_copy(&mesh->ldata, &ldata, CD_MASK_MESH, CD_DEFAULT, totloops); + CustomData_copy_data(&mesh->ldata, &ldata, 0, 0, mesh->totloop); + + if (!CustomData_has_layer(&ldata, CD_MLOOP)) { + CustomData_add_layer(&ldata, CD_MLOOP, CD_CALLOC, NULL, totloops); + } + + CustomData_free(&mesh->ldata, mesh->totloop); + mesh->ldata = ldata; + BKE_mesh_update_customdata_pointers(mesh, false); + + mesh->totloop = totloops; +} + +static void mesh_add_mpolygons(Mesh *mesh, size_t len) +{ + if (len == 0) { + return; + } + + const int totpolys = mesh->totpoly + len; + + CustomData pdata; + CustomData_copy(&mesh->pdata, &pdata, CD_MASK_MESH, CD_DEFAULT, totpolys); + CustomData_copy_data(&mesh->pdata, &pdata, 0, 0, mesh->totpoly); + + if (!CustomData_has_layer(&pdata, CD_MPOLY)) { + CustomData_add_layer(&pdata, CD_MPOLY, CD_CALLOC, NULL, totpolys); + } + + CustomData_free(&mesh->pdata, mesh->totpoly); + mesh->pdata = pdata; + BKE_mesh_update_customdata_pointers(mesh, false); + + mesh->totpoly = totpolys; +} + +static void build_mat_map(const Main *bmain, std::map<std::string, Material *> &mat_map) +{ + Material *material = static_cast<Material *>(bmain->mat.first); + + for (; material; material = static_cast<Material *>(material->id.next)) { + mat_map[material->id.name + 2] = material; + } +} + +static void assign_materials(Main *bmain, Object *ob, const std::map<std::string, int> &mat_index_map) +{ + bool can_assign = true; + std::map<std::string, int>::const_iterator it = mat_index_map.begin(); + + int matcount = 0; + for (; it != mat_index_map.end(); ++it, ++matcount) { + if (!BKE_object_material_slot_add(ob)) { + can_assign = false; + break; + } + } + + /* TODO(kevin): use global map? */ + std::map<std::string, Material *> mat_map; + build_mat_map(bmain, mat_map); + + std::map<std::string, Material *>::iterator mat_iter; + + if (can_assign) { + it = mat_index_map.begin(); + + for (; it != mat_index_map.end(); ++it) { + std::string mat_name = it->first; + mat_iter = mat_map.find(mat_name.c_str()); + + Material *assigned_name; + + if (mat_iter == mat_map.end()) { + assigned_name = BKE_material_add(bmain, mat_name.c_str()); + mat_map[mat_name] = assigned_name; + } + else { + assigned_name = mat_iter->second; + } + + assign_material(ob, assigned_name, it->second, BKE_MAT_ASSIGN_OBJECT); + } + } +} + +} /* namespace utils */ + +/* ************************************************************************** */ + +using Alembic::AbcGeom::UInt32ArraySamplePtr; +using Alembic::AbcGeom::V2fArraySamplePtr; + +struct AbcMeshData { + Int32ArraySamplePtr face_indices; + Int32ArraySamplePtr face_counts; + + P3fArraySamplePtr positions; + + N3fArraySamplePtr vertex_normals; + N3fArraySamplePtr face_normals; + + V2fArraySamplePtr uvs; + UInt32ArraySamplePtr uvs_indices; +}; + +static void *add_customdata_cb(void *user_data, const char *name, int data_type) +{ + Mesh *mesh = static_cast<Mesh *>(user_data); + CustomDataType cd_data_type = static_cast<CustomDataType>(data_type); + void *cd_ptr = NULL; + + int index = -1; + if (cd_data_type == CD_MLOOPUV) { + index = ED_mesh_uv_texture_add(mesh, name, true); + cd_ptr = CustomData_get_layer(&mesh->ldata, cd_data_type); + } + else if (cd_data_type == CD_MLOOPCOL) { + index = ED_mesh_color_add(mesh, name, true); + cd_ptr = CustomData_get_layer(&mesh->ldata, cd_data_type); + } + + if (index == -1) { + return NULL; + } + + return cd_ptr; +} + +CDStreamConfig create_config(Mesh *mesh) +{ + CDStreamConfig config; + + config.mvert = mesh->mvert; + config.mpoly = mesh->mpoly; + config.mloop = mesh->mloop; + config.totpoly = mesh->totpoly; + config.totloop = mesh->totloop; + config.user_data = mesh; + config.loopdata = &mesh->ldata; + config.add_customdata_cb = add_customdata_cb; + + return config; +} + +static void read_mverts(CDStreamConfig &config, const AbcMeshData &mesh_data) +{ + MVert *mverts = config.mvert; + const P3fArraySamplePtr &positions = mesh_data.positions; + const N3fArraySamplePtr &normals = mesh_data.vertex_normals; + + read_mverts(mverts, positions, normals); +} + +void read_mverts(MVert *mverts, const P3fArraySamplePtr &positions, const N3fArraySamplePtr &normals) +{ + for (int i = 0; i < positions->size(); ++i) { + MVert &mvert = mverts[i]; + Imath::V3f pos_in = (*positions)[i]; + + copy_yup_zup(mvert.co, pos_in.getValue()); + + mvert.bweight = 0; + + if (normals) { + Imath::V3f nor_in = (*normals)[i]; + + short no[3]; + normal_float_to_short_v3(no, nor_in.getValue()); + + copy_yup_zup(mvert.no, no); + } + } +} + +static void read_mpolys(CDStreamConfig &config, const AbcMeshData &mesh_data) +{ + MPoly *mpolys = config.mpoly; + MLoop *mloops = config.mloop; + MLoopUV *mloopuvs = config.mloopuv; + + const Int32ArraySamplePtr &face_indices = mesh_data.face_indices; + const Int32ArraySamplePtr &face_counts = mesh_data.face_counts; + const V2fArraySamplePtr &uvs = mesh_data.uvs; + const UInt32ArraySamplePtr &uvs_indices = mesh_data.uvs_indices; + const N3fArraySamplePtr &normals = mesh_data.face_normals; + + const bool do_uvs = (mloopuvs && uvs && uvs_indices) && (uvs_indices->size() == face_indices->size()); + unsigned int loop_index = 0; + unsigned int rev_loop_index = 0; + unsigned int uv_index = 0; + + for (int i = 0; i < face_counts->size(); ++i) { + const int face_size = (*face_counts)[i]; + + MPoly &poly = mpolys[i]; + poly.loopstart = loop_index; + poly.totloop = face_size; + + if (normals != NULL) { + poly.flag |= ME_SMOOTH; + } + + /* NOTE: Alembic data is stored in the reverse order. */ + rev_loop_index = loop_index + (face_size - 1); + + for (int f = 0; f < face_size; ++f, ++loop_index, --rev_loop_index) { + MLoop &loop = mloops[rev_loop_index]; + loop.v = (*face_indices)[loop_index]; + + if (do_uvs) { + MLoopUV &loopuv = mloopuvs[rev_loop_index]; + + uv_index = (*uvs_indices)[loop_index]; + loopuv.uv[0] = (*uvs)[uv_index][0]; + loopuv.uv[1] = (*uvs)[uv_index][1]; + } + } + } +} + +ABC_INLINE void read_uvs_params(CDStreamConfig &config, + AbcMeshData &abc_data, + const IV2fGeomParam &uv, + const ISampleSelector &selector) +{ + if (!uv.valid()) { + return; + } + + IV2fGeomParam::Sample uvsamp; + uv.getIndexed(uvsamp, selector); + + abc_data.uvs = uvsamp.getVals(); + abc_data.uvs_indices = uvsamp.getIndices(); + + if (abc_data.uvs_indices->size() == config.totloop) { + std::string name = Alembic::Abc::GetSourceName(uv.getMetaData()); + + /* According to the convention, primary UVs should have had their name + * set using Alembic::Abc::SetSourceName, but you can't expect everyone + * to follow it! :) */ + if (name.empty()) { + name = uv.getName(); + } + + void *cd_ptr = config.add_customdata_cb(config.user_data, name.c_str(), CD_MLOOPUV); + config.mloopuv = static_cast<MLoopUV *>(cd_ptr); + } +} + +/* TODO(kevin): normals from Alembic files are not read in anymore, this is due + * to the fact that there are many issues that are not so easy to solve, mainly + * regarding the way normals are handled in Blender (MPoly.flag vs loop normals). + */ +ABC_INLINE void read_normals_params(AbcMeshData &abc_data, + const IN3fGeomParam &normals, + const ISampleSelector &selector) +{ + if (!normals.valid()) { + return; + } + + IN3fGeomParam::Sample normsamp = normals.getExpandedValue(selector); + + if (normals.getScope() == kFacevaryingScope) { + abc_data.face_normals = normsamp.getVals(); + } + else if ((normals.getScope() == kVertexScope) || (normals.getScope() == kVaryingScope)) { + abc_data.vertex_normals = N3fArraySamplePtr(); + } +} + +/* ************************************************************************** */ + +AbcMeshReader::AbcMeshReader(const IObject &object, ImportSettings &settings) + : AbcObjectReader(object, settings) +{ + m_settings->read_flag |= MOD_MESHSEQ_READ_ALL; + + IPolyMesh ipoly_mesh(m_iobject, kWrapExisting); + m_schema = ipoly_mesh.getSchema(); + get_min_max_time(m_schema, m_min_time, m_max_time); +} + +bool AbcMeshReader::valid() const +{ + return m_schema.valid(); +} + +void AbcMeshReader::readObjectData(Main *bmain, float time) +{ + Mesh *mesh = BKE_mesh_add(bmain, m_data_name.c_str()); + + m_object = BKE_object_add_only_object(bmain, OB_MESH, m_object_name.c_str()); + m_object->data = mesh; + + const ISampleSelector sample_sel(time); + const IPolyMeshSchema::Sample sample = m_schema.getValue(sample_sel); + + const P3fArraySamplePtr &positions = sample.getPositions(); + const Int32ArraySamplePtr &face_indices = sample.getFaceIndices(); + const Int32ArraySamplePtr &face_counts = sample.getFaceCounts(); + + utils::mesh_add_verts(mesh, positions->size()); + utils::mesh_add_mpolygons(mesh, face_counts->size()); + utils::mesh_add_mloops(mesh, face_indices->size()); + + m_mesh_data = create_config(mesh); + + bool has_smooth_normals = false; + read_mesh_sample(m_settings, m_schema, sample_sel, m_mesh_data, has_smooth_normals); + + BKE_mesh_calc_normals(mesh); + BKE_mesh_calc_edges(mesh, false, false); + + if (m_settings->validate_meshes) { + BKE_mesh_validate(mesh, false, false); + } + + readFaceSetsSample(bmain, mesh, 0, sample_sel); + + if (has_animations(m_schema, m_settings)) { + addCacheModifier(); + } +} + +void AbcMeshReader::readFaceSetsSample(Main *bmain, Mesh *mesh, size_t poly_start, + const ISampleSelector &sample_sel) +{ + std::vector<std::string> face_sets; + m_schema.getFaceSetNames(face_sets); + + if (face_sets.empty()) { + return; + } + + std::map<std::string, int> mat_map; + int current_mat = 0; + + for (int i = 0; i < face_sets.size(); ++i) { + const std::string &grp_name = face_sets[i]; + + if (mat_map.find(grp_name) == mat_map.end()) { + mat_map[grp_name] = 1 + current_mat++; + } + + const int assigned_mat = mat_map[grp_name]; + + const IFaceSet faceset = m_schema.getFaceSet(grp_name); + + if (!faceset.valid()) { + continue; + } + + const IFaceSetSchema face_schem = faceset.getSchema(); + const IFaceSetSchema::Sample face_sample = face_schem.getValue(sample_sel); + const Int32ArraySamplePtr group_faces = face_sample.getFaces(); + const size_t num_group_faces = group_faces->size(); + + for (size_t l = 0; l < num_group_faces; l++) { + size_t pos = (*group_faces)[l] + poly_start; + + if (pos >= mesh->totpoly) { + std::cerr << "Faceset overflow on " << faceset.getName() << '\n'; + break; + } + + MPoly &poly = mesh->mpoly[pos]; + poly.mat_nr = assigned_mat - 1; + } + } + + utils::assign_materials(bmain, m_object, mat_map); +} + +void read_mesh_sample(ImportSettings *settings, + const IPolyMeshSchema &schema, + const ISampleSelector &selector, + CDStreamConfig &config, + bool &do_normals) +{ + const IPolyMeshSchema::Sample sample = schema.getValue(selector); + + AbcMeshData abc_mesh_data; + abc_mesh_data.face_counts = sample.getFaceCounts(); + abc_mesh_data.face_indices = sample.getFaceIndices(); + abc_mesh_data.positions = sample.getPositions(); + + read_normals_params(abc_mesh_data, schema.getNormalsParam(), selector); + + do_normals = (abc_mesh_data.face_normals != NULL); + + if ((settings->read_flag & MOD_MESHSEQ_READ_UV) != 0) { + read_uvs_params(config, abc_mesh_data, schema.getUVsParam(), selector); + } + + if ((settings->read_flag & MOD_MESHSEQ_READ_VERT) != 0) { + read_mverts(config, abc_mesh_data); + } + + if ((settings->read_flag & MOD_MESHSEQ_READ_POLY) != 0) { + read_mpolys(config, abc_mesh_data); + } + + if ((settings->read_flag & (MOD_MESHSEQ_READ_UV | MOD_MESHSEQ_READ_COLOR)) != 0) { + read_custom_data(schema.getArbGeomParams(), config, selector); + } + + /* TODO: face sets */ +} + +/* ************************************************************************** */ + +ABC_INLINE MEdge *find_edge(MEdge *edges, int totedge, int v1, int v2) +{ + for (int i = 0, e = totedge; i < e; ++i) { + MEdge &edge = edges[i]; + + if (edge.v1 == v1 && edge.v2 == v2) { + return &edge; + } + } + + return NULL; +} + +AbcSubDReader::AbcSubDReader(const IObject &object, ImportSettings &settings) + : AbcObjectReader(object, settings) +{ + m_settings->read_flag |= MOD_MESHSEQ_READ_ALL; + + ISubD isubd_mesh(m_iobject, kWrapExisting); + m_schema = isubd_mesh.getSchema(); + get_min_max_time(m_schema, m_min_time, m_max_time); +} + +bool AbcSubDReader::valid() const +{ + return m_schema.valid(); +} + +void AbcSubDReader::readObjectData(Main *bmain, float time) +{ + Mesh *mesh = BKE_mesh_add(bmain, m_data_name.c_str()); + + m_object = BKE_object_add_only_object(bmain, OB_MESH, m_object_name.c_str()); + m_object->data = mesh; + + const ISampleSelector sample_sel(time); + const ISubDSchema::Sample sample = m_schema.getValue(sample_sel); + + const P3fArraySamplePtr &positions = sample.getPositions(); + const Int32ArraySamplePtr &face_indices = sample.getFaceIndices(); + const Int32ArraySamplePtr &face_counts = sample.getFaceCounts(); + + utils::mesh_add_verts(mesh, positions->size()); + utils::mesh_add_mpolygons(mesh, face_counts->size()); + utils::mesh_add_mloops(mesh, face_indices->size()); + + m_mesh_data = create_config(mesh); + + read_subd_sample(m_settings, m_schema, sample_sel, m_mesh_data); + + Int32ArraySamplePtr indices = sample.getCreaseIndices(); + Alembic::Abc::FloatArraySamplePtr sharpnesses = sample.getCreaseSharpnesses(); + + MEdge *edges = mesh->medge; + + if (indices && sharpnesses) { + for (int i = 0, s = 0, e = indices->size(); i < e; i += 2, ++s) { + MEdge *edge = find_edge(edges, mesh->totedge, (*indices)[i], (*indices)[i + 1]); + + if (edge) { + edge->crease = FTOCHAR((*sharpnesses)[s]); + } + } + + mesh->cd_flag |= ME_CDFLAG_EDGE_CREASE; + } + + BKE_mesh_calc_normals(mesh); + BKE_mesh_calc_edges(mesh, false, false); + + if (m_settings->validate_meshes) { + BKE_mesh_validate(mesh, false, false); + } + + if (has_animations(m_schema, m_settings)) { + addCacheModifier(); + } +} + +void read_subd_sample(ImportSettings *settings, + const ISubDSchema &schema, + const ISampleSelector &selector, + CDStreamConfig &config) +{ + const ISubDSchema::Sample sample = schema.getValue(selector); + + AbcMeshData abc_mesh_data; + abc_mesh_data.face_counts = sample.getFaceCounts(); + abc_mesh_data.face_indices = sample.getFaceIndices(); + abc_mesh_data.vertex_normals = N3fArraySamplePtr(); + abc_mesh_data.face_normals = N3fArraySamplePtr(); + abc_mesh_data.positions = sample.getPositions(); + + if ((settings->read_flag & MOD_MESHSEQ_READ_UV) != 0) { + read_uvs_params(config, abc_mesh_data, schema.getUVsParam(), selector); + } + + if ((settings->read_flag & MOD_MESHSEQ_READ_VERT) != 0) { + read_mverts(config, abc_mesh_data); + } + + if ((settings->read_flag & MOD_MESHSEQ_READ_POLY) != 0) { + read_mpolys(config, abc_mesh_data); + } + + if ((settings->read_flag & (MOD_MESHSEQ_READ_UV | MOD_MESHSEQ_READ_COLOR)) != 0) { + read_custom_data(schema.getArbGeomParams(), config, selector); + } + + /* TODO: face sets */ +} |