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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_persistent_data_handle.hh"
#include "DNA_mesh_types.h"
#include "DNA_meshdata_types.h"
#include "DNA_pointcloud_types.h"
#include "node_geometry_util.hh"
static bNodeSocketTemplate geo_node_point_instance_in[] = {
{SOCK_GEOMETRY, N_("Geometry")},
{SOCK_OBJECT, N_("Object")},
{SOCK_STRING, N_("Position Attribute")},
{SOCK_STRING, N_("Rotation Attribute")},
{SOCK_STRING, N_("Scale Attribute")},
{-1, ""},
};
static bNodeSocketTemplate geo_node_point_instance_out[] = {
{SOCK_GEOMETRY, N_("Geometry")},
{-1, ""},
};
namespace blender::nodes {
static void set_default_string(bNode *node, const int socket_index, StringRef str)
{
bNodeSocket *socket = static_cast<bNodeSocket *>(BLI_findlink(&node->inputs, socket_index));
bNodeSocketValueString *value = static_cast<bNodeSocketValueString *>(socket->default_value);
str.copy(value->value);
}
static void geo_node_point_instance_init(bNodeTree *UNUSED(tree), bNode *node)
{
set_default_string(node, 2, "Position");
set_default_string(node, 3, "Rotation");
set_default_string(node, 4, "Scale");
}
static void add_instances_from_geometry_component(InstancesComponent &instances,
const GeometryComponent &src_geometry,
Object *object,
const GeoNodeExecParams ¶ms)
{
const std::string position_attribute = params.get_input<std::string>("Position Attribute");
const std::string rotation_attribute = params.get_input<std::string>("Rotation Attribute");
const std::string scale_attribute = params.get_input<std::string>("Scale Attribute");
Float3ReadAttribute positions = src_geometry.attribute_get_for_read<float3>(
position_attribute, ATTR_DOMAIN_POINT, {0, 0, 0});
Float3ReadAttribute rotations = src_geometry.attribute_get_for_read<float3>(
rotation_attribute, ATTR_DOMAIN_POINT, {0, 0, 0});
Float3ReadAttribute scales = src_geometry.attribute_get_for_read<float3>(
scale_attribute, ATTR_DOMAIN_POINT, {1, 1, 1});
for (const int i : IndexRange(positions.size())) {
instances.add_instance(object, positions[i], rotations[i], scales[i]);
}
}
static void geo_node_point_instance_exec(GeoNodeExecParams params)
{
GeometrySet geometry_set = params.extract_input<GeometrySet>("Geometry");
bke::PersistentObjectHandle object_handle = params.extract_input<bke::PersistentObjectHandle>(
"Object");
Object *object = params.handle_map().lookup(object_handle);
if (object != nullptr) {
InstancesComponent &instances = geometry_set.get_component_for_write<InstancesComponent>();
if (geometry_set.has<MeshComponent>()) {
add_instances_from_geometry_component(
instances, *geometry_set.get_component_for_read<MeshComponent>(), object, params);
}
if (geometry_set.has<PointCloudComponent>()) {
add_instances_from_geometry_component(
instances, *geometry_set.get_component_for_read<PointCloudComponent>(), object, params);
}
}
geometry_set.remove<MeshComponent>();
geometry_set.remove<PointCloudComponent>();
params.set_output("Geometry", std::move(geometry_set));
}
} // namespace blender::nodes
void register_node_type_geo_point_instance()
{
static bNodeType ntype;
geo_node_type_base(&ntype, GEO_NODE_POINT_INSTANCE, "Point Instance", 0, 0);
node_type_socket_templates(&ntype, geo_node_point_instance_in, geo_node_point_instance_out);
node_type_init(&ntype, blender::nodes::geo_node_point_instance_init);
ntype.geometry_node_execute = blender::nodes::geo_node_point_instance_exec;
nodeRegisterType(&ntype);
}
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