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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.
*/
#include "BKE_mesh.h"
#include "BKE_mesh_runtime.h"
#include "BKE_pointcloud.h"
#include "DNA_mesh_types.h"
#include "DNA_meshdata_types.h"
#include "node_geometry_util.hh"
static bNodeSocketTemplate geo_node_join_geometry_in[] = {
{SOCK_GEOMETRY,
N_("Geometry"),
0.0f,
0.0f,
0.0f,
1.0f,
-1.0f,
1.0f,
PROP_NONE,
SOCK_MULTI_INPUT},
{-1, ""},
};
static bNodeSocketTemplate geo_node_join_geometry_out[] = {
{SOCK_GEOMETRY, N_("Geometry")},
{-1, ""},
};
namespace blender::nodes {
static Mesh *join_mesh_topology_and_builtin_attributes(Span<const MeshComponent *> src_components)
{
int totverts = 0;
int totloops = 0;
int totedges = 0;
int totpolys = 0;
int64_t cd_dirty_vert = 0;
int64_t cd_dirty_poly = 0;
int64_t cd_dirty_edge = 0;
int64_t cd_dirty_loop = 0;
for (const MeshComponent *mesh_component : src_components) {
const Mesh *mesh = mesh_component->get_for_read();
totverts += mesh->totvert;
totloops += mesh->totloop;
totedges += mesh->totedge;
totpolys += mesh->totpoly;
cd_dirty_vert |= mesh->runtime.cd_dirty_vert;
cd_dirty_poly |= mesh->runtime.cd_dirty_poly;
cd_dirty_edge |= mesh->runtime.cd_dirty_edge;
cd_dirty_loop |= mesh->runtime.cd_dirty_loop;
}
const Mesh *first_input_mesh = src_components[0]->get_for_read();
Mesh *new_mesh = BKE_mesh_new_nomain(totverts, totedges, 0, totloops, totpolys);
BKE_mesh_copy_settings(new_mesh, first_input_mesh);
new_mesh->runtime.cd_dirty_vert = cd_dirty_vert;
new_mesh->runtime.cd_dirty_poly = cd_dirty_poly;
new_mesh->runtime.cd_dirty_edge = cd_dirty_edge;
new_mesh->runtime.cd_dirty_loop = cd_dirty_loop;
int vert_offset = 0;
int loop_offset = 0;
int edge_offset = 0;
int poly_offset = 0;
for (const MeshComponent *mesh_component : src_components) {
const Mesh *mesh = mesh_component->get_for_read();
if (mesh == nullptr) {
continue;
}
for (const int i : IndexRange(mesh->totvert)) {
const MVert &old_vert = mesh->mvert[i];
MVert &new_vert = new_mesh->mvert[vert_offset + i];
new_vert = old_vert;
}
for (const int i : IndexRange(mesh->totedge)) {
const MEdge &old_edge = mesh->medge[i];
MEdge &new_edge = new_mesh->medge[edge_offset + i];
new_edge = old_edge;
new_edge.v1 += vert_offset;
new_edge.v2 += vert_offset;
}
for (const int i : IndexRange(mesh->totloop)) {
const MLoop &old_loop = mesh->mloop[i];
MLoop &new_loop = new_mesh->mloop[loop_offset + i];
new_loop = old_loop;
new_loop.v += vert_offset;
new_loop.e += edge_offset;
}
for (const int i : IndexRange(mesh->totpoly)) {
const MPoly &old_poly = mesh->mpoly[i];
MPoly &new_poly = new_mesh->mpoly[poly_offset + i];
new_poly = old_poly;
new_poly.loopstart += loop_offset;
}
vert_offset += mesh->totvert;
loop_offset += mesh->totloop;
edge_offset += mesh->totedge;
poly_offset += mesh->totpoly;
}
return new_mesh;
}
template<typename Component>
static Array<const GeometryComponent *> to_base_components(Span<const Component *> components)
{
return components;
}
static Set<std::string> find_all_attribute_names(Span<const GeometryComponent *> components)
{
Set<std::string> attribute_names;
for (const GeometryComponent *component : components) {
Set<std::string> names = component->attribute_names();
for (const std::string &name : names) {
attribute_names.add(name);
}
}
return attribute_names;
}
static void determine_final_data_type_and_domain(Span<const GeometryComponent *> components,
StringRef attribute_name,
CustomDataType *r_type,
AttributeDomain *r_domain)
{
Vector<CustomDataType> data_types;
Vector<AttributeDomain> domains;
for (const GeometryComponent *component : components) {
ReadAttributePtr attribute = component->attribute_try_get_for_read(attribute_name);
if (attribute) {
data_types.append(attribute->custom_data_type());
domains.append(attribute->domain());
}
}
*r_type = attribute_data_type_highest_complexity(data_types);
*r_domain = attribute_domain_highest_priority(domains);
}
static void fill_new_attribute(Span<const GeometryComponent *> src_components,
StringRef attribute_name,
const CustomDataType data_type,
const AttributeDomain domain,
fn::GMutableSpan dst_span)
{
const CPPType *cpp_type = bke::custom_data_type_to_cpp_type(data_type);
BLI_assert(cpp_type != nullptr);
int offset = 0;
for (const GeometryComponent *component : src_components) {
const int domain_size = component->attribute_domain_size(domain);
if (domain_size == 0) {
continue;
}
ReadAttributePtr read_attribute = component->attribute_get_for_read(
attribute_name, domain, data_type, nullptr);
fn::GSpan src_span = read_attribute->get_span();
const void *src_buffer = src_span.data();
void *dst_buffer = dst_span[offset];
cpp_type->copy_to_initialized_n(src_buffer, dst_buffer, domain_size);
offset += domain_size;
}
}
static void join_attributes(Span<const GeometryComponent *> src_components,
GeometryComponent &result,
Span<StringRef> ignored_attributes = {})
{
Set<std::string> attribute_names = find_all_attribute_names(src_components);
for (StringRef name : ignored_attributes) {
attribute_names.remove(name);
}
for (const std::string &attribute_name : attribute_names) {
CustomDataType data_type;
AttributeDomain domain;
determine_final_data_type_and_domain(src_components, attribute_name, &data_type, &domain);
OutputAttributePtr write_attribute = result.attribute_try_get_for_output(
attribute_name, domain, data_type);
if (!write_attribute ||
&write_attribute->cpp_type() != bke::custom_data_type_to_cpp_type(data_type) ||
write_attribute->domain() != domain) {
continue;
}
fn::GMutableSpan dst_span = write_attribute->get_span_for_write_only();
fill_new_attribute(src_components, attribute_name, data_type, domain, dst_span);
write_attribute.apply_span_and_save();
}
}
static void join_components(Span<const MeshComponent *> src_components, GeometrySet &result)
{
Mesh *new_mesh = join_mesh_topology_and_builtin_attributes(src_components);
MeshComponent &dst_component = result.get_component_for_write<MeshComponent>();
dst_component.replace(new_mesh);
/* The position attribute is handled above already. */
join_attributes(to_base_components(src_components), dst_component, {"position"});
}
static void join_components(Span<const PointCloudComponent *> src_components, GeometrySet &result)
{
int totpoints = 0;
for (const PointCloudComponent *pointcloud_component : src_components) {
totpoints += pointcloud_component->attribute_domain_size(ATTR_DOMAIN_POINT);
}
PointCloudComponent &dst_component = result.get_component_for_write<PointCloudComponent>();
PointCloud *pointcloud = BKE_pointcloud_new_nomain(totpoints);
dst_component.replace(pointcloud);
join_attributes(to_base_components(src_components), dst_component);
}
static void join_components(Span<const InstancesComponent *> src_components, GeometrySet &result)
{
InstancesComponent &dst_component = result.get_component_for_write<InstancesComponent>();
for (const InstancesComponent *component : src_components) {
const int size = component->instances_amount();
Span<InstancedData> instanced_data = component->instanced_data();
Span<float4x4> transforms = component->transforms();
for (const int i : IndexRange(size)) {
dst_component.add_instance(instanced_data[i], transforms[i]);
}
}
}
static void join_components(Span<const VolumeComponent *> src_components, GeometrySet &result)
{
/* Not yet supported. Joining volume grids with the same name requires resampling of at least one
* of the grids. The cell size of the resulting volume has to be determined somehow. */
VolumeComponent &dst_component = result.get_component_for_write<VolumeComponent>();
UNUSED_VARS(src_components, dst_component);
}
template<typename Component>
static void join_component_type(Span<GeometrySet> src_geometry_sets, GeometrySet &result)
{
Vector<const Component *> components;
for (const GeometrySet &geometry_set : src_geometry_sets) {
const Component *component = geometry_set.get_component_for_read<Component>();
if (component != nullptr && !component->is_empty()) {
components.append(component);
}
}
if (components.size() == 0) {
return;
}
if (components.size() == 1) {
result.add(*components[0]);
return;
}
join_components(components, result);
}
static void geo_node_join_geometry_exec(GeoNodeExecParams params)
{
Vector<GeometrySet> geometry_sets = params.extract_multi_input<GeometrySet>("Geometry");
GeometrySet geometry_set_result;
join_component_type<MeshComponent>(geometry_sets, geometry_set_result);
join_component_type<PointCloudComponent>(geometry_sets, geometry_set_result);
join_component_type<InstancesComponent>(geometry_sets, geometry_set_result);
join_component_type<VolumeComponent>(geometry_sets, geometry_set_result);
params.set_output("Geometry", std::move(geometry_set_result));
}
} // namespace blender::nodes
void register_node_type_geo_join_geometry()
{
static bNodeType ntype;
geo_node_type_base(&ntype, GEO_NODE_JOIN_GEOMETRY, "Join Geometry", NODE_CLASS_GEOMETRY, 0);
node_type_socket_templates(&ntype, geo_node_join_geometry_in, geo_node_join_geometry_out);
ntype.geometry_node_execute = blender::nodes::geo_node_join_geometry_exec;
nodeRegisterType(&ntype);
}
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