diff options
Diffstat (limited to 'source/blender/nodes/geometry/nodes/node_geo_attribute_transfer.cc')
| -rw-r--r-- | source/blender/nodes/geometry/nodes/node_geo_attribute_transfer.cc | 597 |
1 files changed, 597 insertions, 0 deletions
diff --git a/source/blender/nodes/geometry/nodes/node_geo_attribute_transfer.cc b/source/blender/nodes/geometry/nodes/node_geo_attribute_transfer.cc new file mode 100644 index 00000000000..4b677dc5c82 --- /dev/null +++ b/source/blender/nodes/geometry/nodes/node_geo_attribute_transfer.cc @@ -0,0 +1,597 @@ +/* + * 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. + */ + +#include "BLI_kdopbvh.h" + +#include "DNA_mesh_types.h" +#include "DNA_meshdata_types.h" +#include "DNA_pointcloud_types.h" + +#include "BKE_bvhutils.h" +#include "BKE_mesh_runtime.h" +#include "BKE_mesh_sample.hh" + +#include "UI_interface.h" +#include "UI_resources.h" + +#include "node_geometry_util.hh" + +static bNodeSocketTemplate geo_node_attribute_transfer_in[] = { + {SOCK_GEOMETRY, N_("Geometry")}, + {SOCK_GEOMETRY, N_("Source Geometry")}, + {SOCK_STRING, N_("Source")}, + {SOCK_STRING, N_("Destination")}, + {-1, ""}, +}; + +static bNodeSocketTemplate geo_node_attribute_transfer_out[] = { + {SOCK_GEOMETRY, N_("Geometry")}, + {-1, ""}, +}; + +static void geo_node_attribute_transfer_layout(uiLayout *layout, + bContext *UNUSED(C), + PointerRNA *ptr) +{ + uiLayoutSetPropSep(layout, true); + uiLayoutSetPropDecorate(layout, false); + uiItemR(layout, ptr, "domain", 0, IFACE_("Domain"), ICON_NONE); + uiItemR(layout, ptr, "mapping", 0, IFACE_("Mapping"), ICON_NONE); +} + +namespace blender::nodes { + +static void geo_node_attribute_transfer_init(bNodeTree *UNUSED(tree), bNode *node) +{ + NodeGeometryAttributeTransfer *data = (NodeGeometryAttributeTransfer *)MEM_callocN( + sizeof(NodeGeometryAttributeTransfer), __func__); + data->domain = ATTR_DOMAIN_AUTO; + node->storage = data; +} + +static void get_result_domain_and_data_type(const GeometrySet &src_geometry, + const GeometryComponent &dst_component, + const StringRef attribute_name, + CustomDataType *r_data_type, + AttributeDomain *r_domain) +{ + Vector<CustomDataType> data_types; + Vector<AttributeDomain> domains; + + const PointCloudComponent *pointcloud_component = + src_geometry.get_component_for_read<PointCloudComponent>(); + if (pointcloud_component != nullptr) { + std::optional<AttributeMetaData> meta_data = pointcloud_component->attribute_get_meta_data( + attribute_name); + if (meta_data.has_value()) { + data_types.append(meta_data->data_type); + domains.append(meta_data->domain); + } + } + + const MeshComponent *mesh_component = src_geometry.get_component_for_read<MeshComponent>(); + if (mesh_component != nullptr) { + std::optional<AttributeMetaData> meta_data = mesh_component->attribute_get_meta_data( + attribute_name); + if (meta_data.has_value()) { + data_types.append(meta_data->data_type); + domains.append(meta_data->domain); + } + } + + *r_data_type = bke::attribute_data_type_highest_complexity(data_types); + + if (dst_component.type() == GEO_COMPONENT_TYPE_POINT_CLOUD) { + *r_domain = ATTR_DOMAIN_POINT; + } + else { + *r_domain = bke::attribute_domain_highest_priority(domains); + } +} + +static Span<MLoopTri> get_mesh_looptris(const Mesh &mesh) +{ + /* This only updates a cache and can be considered to be logically const. */ + const MLoopTri *looptris = BKE_mesh_runtime_looptri_ensure(const_cast<Mesh *>(&mesh)); + const int looptris_len = BKE_mesh_runtime_looptri_len(&mesh); + return {looptris, looptris_len}; +} + +static void get_closest_in_bvhtree(BVHTreeFromMesh &tree_data, + const VArray<float3> &positions, + const MutableSpan<int> r_indices, + const MutableSpan<float> r_distances_sq, + const MutableSpan<float3> r_positions) +{ + BLI_assert(positions.size() == r_indices.size() || r_indices.is_empty()); + BLI_assert(positions.size() == r_distances_sq.size() || r_distances_sq.is_empty()); + BLI_assert(positions.size() == r_positions.size() || r_positions.is_empty()); + + for (const int i : positions.index_range()) { + BVHTreeNearest nearest; + nearest.dist_sq = FLT_MAX; + const float3 position = positions[i]; + BLI_bvhtree_find_nearest( + tree_data.tree, position, &nearest, tree_data.nearest_callback, &tree_data); + if (!r_indices.is_empty()) { + r_indices[i] = nearest.index; + } + if (!r_distances_sq.is_empty()) { + r_distances_sq[i] = nearest.dist_sq; + } + if (!r_positions.is_empty()) { + r_positions[i] = nearest.co; + } + } +} + +static void get_closest_pointcloud_points(const PointCloud &pointcloud, + const VArray<float3> &positions, + const MutableSpan<int> r_indices, + const MutableSpan<float> r_distances_sq) +{ + BLI_assert(positions.size() == r_indices.size()); + BLI_assert(pointcloud.totpoint > 0); + + BVHTreeFromPointCloud tree_data; + BKE_bvhtree_from_pointcloud_get(&tree_data, &pointcloud, 2); + + for (const int i : positions.index_range()) { + BVHTreeNearest nearest; + nearest.dist_sq = FLT_MAX; + const float3 position = positions[i]; + BLI_bvhtree_find_nearest( + tree_data.tree, position, &nearest, tree_data.nearest_callback, &tree_data); + r_indices[i] = nearest.index; + r_distances_sq[i] = nearest.dist_sq; + } + + free_bvhtree_from_pointcloud(&tree_data); +} + +static void get_closest_mesh_points(const Mesh &mesh, + const VArray<float3> &positions, + const MutableSpan<int> r_point_indices, + const MutableSpan<float> r_distances_sq, + const MutableSpan<float3> r_positions) +{ + BLI_assert(mesh.totvert > 0); + BVHTreeFromMesh tree_data; + BKE_bvhtree_from_mesh_get(&tree_data, const_cast<Mesh *>(&mesh), BVHTREE_FROM_VERTS, 2); + get_closest_in_bvhtree(tree_data, positions, r_point_indices, r_distances_sq, r_positions); + free_bvhtree_from_mesh(&tree_data); +} + +static void get_closest_mesh_edges(const Mesh &mesh, + const VArray<float3> &positions, + const MutableSpan<int> r_edge_indices, + const MutableSpan<float> r_distances_sq, + const MutableSpan<float3> r_positions) +{ + BLI_assert(mesh.totedge > 0); + BVHTreeFromMesh tree_data; + BKE_bvhtree_from_mesh_get(&tree_data, const_cast<Mesh *>(&mesh), BVHTREE_FROM_EDGES, 2); + get_closest_in_bvhtree(tree_data, positions, r_edge_indices, r_distances_sq, r_positions); + free_bvhtree_from_mesh(&tree_data); +} + +static void get_closest_mesh_looptris(const Mesh &mesh, + const VArray<float3> &positions, + const MutableSpan<int> r_looptri_indices, + const MutableSpan<float> r_distances_sq, + const MutableSpan<float3> r_positions) +{ + BLI_assert(mesh.totpoly > 0); + BVHTreeFromMesh tree_data; + BKE_bvhtree_from_mesh_get(&tree_data, const_cast<Mesh *>(&mesh), BVHTREE_FROM_LOOPTRI, 2); + get_closest_in_bvhtree(tree_data, positions, r_looptri_indices, r_distances_sq, r_positions); + free_bvhtree_from_mesh(&tree_data); +} + +static void get_closest_mesh_polygons(const Mesh &mesh, + const VArray<float3> &positions, + const MutableSpan<int> r_poly_indices, + const MutableSpan<float> r_distances_sq, + const MutableSpan<float3> r_positions) +{ + BLI_assert(mesh.totpoly > 0); + + Array<int> looptri_indices(positions.size()); + get_closest_mesh_looptris(mesh, positions, looptri_indices, r_distances_sq, r_positions); + + Span<MLoopTri> looptris = get_mesh_looptris(mesh); + for (const int i : positions.index_range()) { + const MLoopTri &looptri = looptris[looptri_indices[i]]; + r_poly_indices[i] = looptri.poly; + } +} + +/* The closest corner is defined to be the closest corner on the closest face. */ +static void get_closest_mesh_corners(const Mesh &mesh, + const VArray<float3> &positions, + const MutableSpan<int> r_corner_indices, + const MutableSpan<float> r_distances_sq, + const MutableSpan<float3> r_positions) +{ + BLI_assert(mesh.totloop > 0); + Array<int> poly_indices(positions.size()); + get_closest_mesh_polygons(mesh, positions, poly_indices, {}, {}); + + for (const int i : positions.index_range()) { + const float3 position = positions[i]; + const int poly_index = poly_indices[i]; + const MPoly &poly = mesh.mpoly[poly_index]; + + /* Find the closest vertex in the polygon. */ + float min_distance_sq = FLT_MAX; + const MVert *closest_mvert; + int closest_loop_index = 0; + for (const int loop_index : IndexRange(poly.loopstart, poly.totloop)) { + const MLoop &loop = mesh.mloop[loop_index]; + const int vertex_index = loop.v; + const MVert &mvert = mesh.mvert[vertex_index]; + const float distance_sq = float3::distance_squared(position, mvert.co); + if (distance_sq < min_distance_sq) { + min_distance_sq = distance_sq; + closest_loop_index = loop_index; + closest_mvert = &mvert; + } + } + if (!r_corner_indices.is_empty()) { + r_corner_indices[i] = closest_loop_index; + } + if (!r_positions.is_empty()) { + r_positions[i] = closest_mvert->co; + } + if (!r_distances_sq.is_empty()) { + r_distances_sq[i] = min_distance_sq; + } + } +} + +static void get_barycentric_coords(const Mesh &mesh, + const Span<int> looptri_indices, + const Span<float3> positions, + const MutableSpan<float3> r_bary_coords) +{ + BLI_assert(r_bary_coords.size() == positions.size()); + BLI_assert(r_bary_coords.size() == looptri_indices.size()); + + Span<MLoopTri> looptris = get_mesh_looptris(mesh); + + for (const int i : r_bary_coords.index_range()) { + const int looptri_index = looptri_indices[i]; + const MLoopTri &looptri = looptris[looptri_index]; + + const int v0_index = mesh.mloop[looptri.tri[0]].v; + const int v1_index = mesh.mloop[looptri.tri[1]].v; + const int v2_index = mesh.mloop[looptri.tri[2]].v; + + interp_weights_tri_v3(r_bary_coords[i], + mesh.mvert[v0_index].co, + mesh.mvert[v1_index].co, + mesh.mvert[v2_index].co, + positions[i]); + } +} + +static void transfer_attribute_nearest_face_interpolated(const GeometrySet &src_geometry, + GeometryComponent &dst_component, + const VArray<float3> &dst_positions, + const AttributeDomain dst_domain, + const CustomDataType data_type, + const StringRef src_name, + const StringRef dst_name) +{ + const int tot_samples = dst_positions.size(); + const MeshComponent *component = src_geometry.get_component_for_read<MeshComponent>(); + if (component == nullptr) { + return; + } + const Mesh *mesh = component->get_for_read(); + if (mesh == nullptr) { + return; + } + if (mesh->totpoly == 0) { + return; + } + ReadAttributeLookup src_attribute = component->attribute_try_get_for_read(src_name, data_type); + if (!src_attribute) { + return; + } + + /* Find closest points on the mesh surface. */ + Array<int> looptri_indices(tot_samples); + Array<float3> positions(tot_samples); + get_closest_mesh_looptris(*mesh, dst_positions, looptri_indices, {}, positions); + + OutputAttribute dst_attribute = dst_component.attribute_try_get_for_output_only( + dst_name, dst_domain, data_type); + if (!dst_attribute) { + return; + } + GMutableSpan dst_span = dst_attribute.as_span(); + Array<float3> bary_coords; + + /* Compute barycentric coordinates only when they are needed. */ + if (src_attribute.domain != ATTR_DOMAIN_FACE) { + bary_coords.reinitialize(tot_samples); + get_barycentric_coords(*mesh, looptri_indices, positions, bary_coords); + } + /* Interpolate the source attribute on the surface. */ + switch (src_attribute.domain) { + case ATTR_DOMAIN_POINT: { + bke::mesh_surface_sample::sample_point_attribute( + *mesh, looptri_indices, bary_coords, *src_attribute.varray, dst_span); + break; + } + case ATTR_DOMAIN_FACE: { + bke::mesh_surface_sample::sample_face_attribute( + *mesh, looptri_indices, *src_attribute.varray, dst_span); + break; + } + case ATTR_DOMAIN_CORNER: { + bke::mesh_surface_sample::sample_corner_attribute( + *mesh, looptri_indices, bary_coords, *src_attribute.varray, dst_span); + break; + } + case ATTR_DOMAIN_EDGE: { + /* Not yet supported. */ + break; + } + default: { + BLI_assert_unreachable(); + break; + } + } + dst_attribute.save(); +} + +static void transfer_attribute_nearest(const GeometrySet &src_geometry, + GeometryComponent &dst_component, + const VArray<float3> &dst_positions, + const AttributeDomain dst_domain, + const CustomDataType data_type, + const StringRef src_name, + const StringRef dst_name) +{ + const CPPType &type = *bke::custom_data_type_to_cpp_type(data_type); + + /* Get pointcloud data from geometry. */ + const PointCloudComponent *pointcloud_component = + src_geometry.get_component_for_read<PointCloudComponent>(); + const PointCloud *pointcloud = pointcloud_component ? pointcloud_component->get_for_read() : + nullptr; + + /* Get mesh data from geometry. */ + const MeshComponent *mesh_component = src_geometry.get_component_for_read<MeshComponent>(); + const Mesh *mesh = mesh_component ? mesh_component->get_for_read() : nullptr; + + const int tot_samples = dst_positions.size(); + + Array<int> pointcloud_indices; + Array<float> pointcloud_distances_sq; + bool use_pointcloud = false; + + /* Depending on where what domain the source attribute lives, these indices are either vertex, + * corner, edge or polygon indices. */ + Array<int> mesh_indices; + Array<float> mesh_distances_sq; + bool use_mesh = false; + + /* If there is a pointcloud, find the closest points. */ + if (pointcloud != nullptr && pointcloud->totpoint > 0) { + if (pointcloud_component->attribute_exists(src_name)) { + use_pointcloud = true; + pointcloud_indices.reinitialize(tot_samples); + pointcloud_distances_sq.reinitialize(tot_samples); + get_closest_pointcloud_points( + *pointcloud, dst_positions, pointcloud_indices, pointcloud_distances_sq); + } + } + + /* If there is a mesh, find the closest mesh elements. */ + if (mesh != nullptr) { + ReadAttributeLookup src_attribute = mesh_component->attribute_try_get_for_read(src_name); + if (src_attribute) { + switch (src_attribute.domain) { + case ATTR_DOMAIN_POINT: { + if (mesh->totvert > 0) { + use_mesh = true; + mesh_indices.reinitialize(tot_samples); + mesh_distances_sq.reinitialize(tot_samples); + get_closest_mesh_points(*mesh, dst_positions, mesh_indices, mesh_distances_sq, {}); + } + break; + } + case ATTR_DOMAIN_EDGE: { + if (mesh->totedge > 0) { + use_mesh = true; + mesh_indices.reinitialize(tot_samples); + mesh_distances_sq.reinitialize(tot_samples); + get_closest_mesh_edges(*mesh, dst_positions, mesh_indices, mesh_distances_sq, {}); + } + break; + } + case ATTR_DOMAIN_FACE: { + if (mesh->totpoly > 0) { + use_mesh = true; + mesh_indices.reinitialize(tot_samples); + mesh_distances_sq.reinitialize(tot_samples); + get_closest_mesh_polygons(*mesh, dst_positions, mesh_indices, mesh_distances_sq, {}); + } + break; + } + case ATTR_DOMAIN_CORNER: { + use_mesh = true; + mesh_indices.reinitialize(tot_samples); + mesh_distances_sq.reinitialize(tot_samples); + get_closest_mesh_corners(*mesh, dst_positions, mesh_indices, mesh_distances_sq, {}); + break; + } + default: { + break; + } + } + } + } + + if (!use_pointcloud && !use_mesh) { + return; + } + + OutputAttribute dst_attribute = dst_component.attribute_try_get_for_output_only( + dst_name, dst_domain, data_type); + if (!dst_attribute) { + return; + } + + /* Create a buffer for intermediate values. */ + BUFFER_FOR_CPP_TYPE_VALUE(type, buffer); + + if (use_mesh && use_pointcloud) { + /* When there is a mesh and a pointcloud, we still have to check whether a pointcloud point or + * a mesh element is closer to every point. */ + ReadAttributeLookup pointcloud_src_attribute = + pointcloud_component->attribute_try_get_for_read(src_name, data_type); + ReadAttributeLookup mesh_src_attribute = mesh_component->attribute_try_get_for_read(src_name, + data_type); + for (const int i : IndexRange(tot_samples)) { + if (pointcloud_distances_sq[i] < mesh_distances_sq[i]) { + /* Pointcloud point is closer. */ + const int index = pointcloud_indices[i]; + pointcloud_src_attribute.varray->get(index, buffer); + dst_attribute->set_by_relocate(i, buffer); + } + else { + /* Mesh element is closer. */ + const int index = mesh_indices[i]; + mesh_src_attribute.varray->get(index, buffer); + dst_attribute->set_by_relocate(i, buffer); + } + } + } + else if (use_pointcloud) { + /* The source geometry only has a pointcloud. */ + ReadAttributeLookup src_attribute = pointcloud_component->attribute_try_get_for_read( + src_name, data_type); + for (const int i : IndexRange(tot_samples)) { + const int index = pointcloud_indices[i]; + src_attribute.varray->get(index, buffer); + dst_attribute->set_by_relocate(i, buffer); + } + } + else if (use_mesh) { + /* The source geometry only has a mesh. */ + ReadAttributeLookup src_attribute = mesh_component->attribute_try_get_for_read(src_name, + data_type); + for (const int i : IndexRange(tot_samples)) { + const int index = mesh_indices[i]; + src_attribute.varray->get(index, buffer); + dst_attribute->set_by_relocate(i, buffer); + } + } + + dst_attribute.save(); +} + +static void transfer_attribute(const GeoNodeExecParams ¶ms, + const GeometrySet &src_geometry, + GeometryComponent &dst_component, + const StringRef src_name, + const StringRef dst_name) +{ + const NodeGeometryAttributeTransfer &storage = + *(const NodeGeometryAttributeTransfer *)params.node().storage; + const GeometryNodeAttributeTransferMapMode mapping = (GeometryNodeAttributeTransferMapMode) + storage.mapping; + const AttributeDomain input_domain = (AttributeDomain)storage.domain; + + CustomDataType data_type; + AttributeDomain auto_domain; + get_result_domain_and_data_type(src_geometry, dst_component, src_name, &data_type, &auto_domain); + const AttributeDomain dst_domain = (input_domain == ATTR_DOMAIN_AUTO) ? auto_domain : + input_domain; + + GVArray_Typed<float3> dst_positions = dst_component.attribute_get_for_read<float3>( + "position", dst_domain, {0, 0, 0}); + + switch (mapping) { + case GEO_NODE_ATTRIBUTE_TRANSFER_NEAREST_FACE_INTERPOLATED: { + transfer_attribute_nearest_face_interpolated( + src_geometry, dst_component, dst_positions, dst_domain, data_type, src_name, dst_name); + break; + } + case GEO_NODE_ATTRIBUTE_TRANSFER_NEAREST: { + transfer_attribute_nearest( + src_geometry, dst_component, dst_positions, dst_domain, data_type, src_name, dst_name); + break; + } + } +} + +static void geo_node_attribute_transfer_exec(GeoNodeExecParams params) +{ + GeometrySet dst_geometry_set = params.extract_input<GeometrySet>("Geometry"); + GeometrySet src_geometry_set = params.extract_input<GeometrySet>("Source Geometry"); + const std::string src_attribute_name = params.extract_input<std::string>("Source"); + const std::string dst_attribute_name = params.extract_input<std::string>("Destination"); + + if (src_attribute_name.empty() || dst_attribute_name.empty()) { + params.set_output("Geometry", dst_geometry_set); + return; + } + + dst_geometry_set = bke::geometry_set_realize_instances(dst_geometry_set); + src_geometry_set = bke::geometry_set_realize_instances(src_geometry_set); + + if (dst_geometry_set.has<MeshComponent>()) { + transfer_attribute(params, + src_geometry_set, + dst_geometry_set.get_component_for_write<MeshComponent>(), + src_attribute_name, + dst_attribute_name); + } + if (dst_geometry_set.has<PointCloudComponent>()) { + transfer_attribute(params, + src_geometry_set, + dst_geometry_set.get_component_for_write<PointCloudComponent>(), + src_attribute_name, + dst_attribute_name); + } + + params.set_output("Geometry", dst_geometry_set); +} + +} // namespace blender::nodes + +void register_node_type_geo_attribute_transfer() +{ + static bNodeType ntype; + + geo_node_type_base( + &ntype, GEO_NODE_ATTRIBUTE_TRANSFER, "Attribute Transfer", NODE_CLASS_ATTRIBUTE, 0); + node_type_socket_templates( + &ntype, geo_node_attribute_transfer_in, geo_node_attribute_transfer_out); + node_type_init(&ntype, blender::nodes::geo_node_attribute_transfer_init); + node_type_storage(&ntype, + "NodeGeometryAttributeTransfer", + node_free_standard_storage, + node_copy_standard_storage); + ntype.geometry_node_execute = blender::nodes::geo_node_attribute_transfer_exec; + ntype.draw_buttons = geo_node_attribute_transfer_layout; + nodeRegisterType(&ntype); +} |