1 files changed, 179 insertions, 0 deletions
diff --git a/source/blender/nodes/geometry/nodes/legacy/node_geo_legacy_point_separate.cc b/source/blender/nodes/geometry/nodes/legacy/node_geo_legacy_point_separate.cc
new file mode 100644
index 00000000000..9260928b311
--- /dev/null
+++ b/source/blender/nodes/geometry/nodes/legacy/node_geo_legacy_point_separate.cc
@@ -0,0 +1,179 @@
+/*
+ * 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_attribute_math.hh"
+#include "BKE_mesh.h"
+#include "BKE_pointcloud.h"
+
+#include "DNA_mesh_types.h"
+#include "DNA_pointcloud_types.h"
+
+#include "node_geometry_util.hh"
+
+namespace blender::nodes {
+
+template<typename T>
+static void copy_data_based_on_mask(Span<T> data,
+                                    Span<bool> masks,
+                                    const bool invert,
+                                    MutableSpan<T> out_data)
+{
+  int offset = 0;
+  for (const int i : data.index_range()) {
+    if (masks[i] != invert) {
+      out_data[offset] = data[i];
+      offset++;
+    }
+  }
+}
+
+void copy_point_attributes_based_on_mask(const GeometryComponent &in_component,
+                                         GeometryComponent &result_component,
+                                         Span<bool> masks,
+                                         const bool invert)
+{
+  for (const AttributeIDRef &attribute_id : in_component.attribute_ids()) {
+    ReadAttributeLookup attribute = in_component.attribute_try_get_for_read(attribute_id);
+    const CustomDataType data_type = bke::cpp_type_to_custom_data_type(attribute.varray.type());
+
+    /* Only copy point attributes. Theoretically this could interpolate attributes on other
+     * domains to the point domain, but that would conflict with attributes that are built-in
+     * on other domains, which causes creating the attributes to fail. */
+    if (attribute.domain != ATTR_DOMAIN_POINT) {
+      continue;
+    }
+
+    OutputAttribute result_attribute = result_component.attribute_try_get_for_output_only(
+        attribute_id, ATTR_DOMAIN_POINT, data_type);
+
+    attribute_math::convert_to_static_type(data_type, [&](auto dummy) {
+      using T = decltype(dummy);
+      VArray_Span span{attribute.varray.typed<T>()};
+      MutableSpan<T> out_span = result_attribute.as_span<T>();
+      copy_data_based_on_mask(span, masks, invert, out_span);
+    });
+
+    result_attribute.save();
+  }
+}
+
+}  // namespace blender::nodes
+
+namespace blender::nodes::node_geo_legacy_point_separate_cc {
+
+static void node_declare(NodeDeclarationBuilder &b)
+{
+  b.add_input<decl::Geometry>(N_("Geometry"));
+  b.add_input<decl::String>(N_("Mask"));
+  b.add_output<decl::Geometry>(N_("Geometry 1"));
+  b.add_output<decl::Geometry>(N_("Geometry 2"));
+}
+
+static void create_component_points(GeometryComponent &component, const int total)
+{
+  switch (component.type()) {
+    case GEO_COMPONENT_TYPE_MESH:
+      static_cast<MeshComponent &>(component).replace(BKE_mesh_new_nomain(total, 0, 0, 0, 0));
+      break;
+    case GEO_COMPONENT_TYPE_POINT_CLOUD:
+      static_cast<PointCloudComponent &>(component).replace(BKE_pointcloud_new_nomain(total));
+      break;
+    default:
+      BLI_assert(false);
+      break;
+  }
+}
+
+static void separate_points_from_component(const GeometryComponent &in_component,
+                                           GeometryComponent &out_component,
+                                           const StringRef mask_name,
+                                           const bool invert)
+{
+  if (!in_component.attribute_domain_supported(ATTR_DOMAIN_POINT) ||
+      in_component.attribute_domain_size(ATTR_DOMAIN_POINT) == 0) {
+    return;
+  }
+
+  const VArray<bool> mask_attribute = in_component.attribute_get_for_read<bool>(
+      mask_name, ATTR_DOMAIN_POINT, false);
+  VArray_Span<bool> masks{mask_attribute};
+
+  const int total = masks.count(!invert);
+  if (total == 0) {
+    return;
+  }
+
+  create_component_points(out_component, total);
+
+  copy_point_attributes_based_on_mask(in_component, out_component, masks, invert);
+}
+
+static GeometrySet separate_geometry_set(const GeometrySet &set_in,
+                                         const StringRef mask_name,
+                                         const bool invert)
+{
+  GeometrySet set_out;
+  for (const GeometryComponent *component : set_in.get_components_for_read()) {
+    if (component->type() == GEO_COMPONENT_TYPE_CURVE) {
+      /* Don't support the curve component for now, even though it has a point domain. */
+      continue;
+    }
+    GeometryComponent &out_component = set_out.get_component_for_write(component->type());
+    separate_points_from_component(*component, out_component, mask_name, invert);
+  }
+  return set_out;
+}
+
+static void node_geo_exec(GeoNodeExecParams params)
+{
+  bool wait_for_inputs = false;
+  wait_for_inputs |= params.lazy_require_input("Geometry");
+  wait_for_inputs |= params.lazy_require_input("Mask");
+  if (wait_for_inputs) {
+    return;
+  }
+  const std::string mask_attribute_name = params.get_input<std::string>("Mask");
+  GeometrySet geometry_set = params.get_input<GeometrySet>("Geometry");
+
+  /* TODO: This is not necessary-- the input geometry set can be read only,
+   * but it must be rewritten to handle instance groups. */
+  geometry_set = geometry::realize_instances_legacy(geometry_set);
+
+  if (params.lazy_output_is_required("Geometry 1")) {
+    params.set_output("Geometry 1",
+                      separate_geometry_set(geometry_set, mask_attribute_name, true));
+  }
+  if (params.lazy_output_is_required("Geometry 2")) {
+    params.set_output("Geometry 2",
+                      separate_geometry_set(geometry_set, mask_attribute_name, false));
+  }
+}
+
+}  // namespace blender::nodes::node_geo_legacy_point_separate_cc
+
+void register_node_type_geo_point_separate()
+{
+  namespace file_ns = blender::nodes::node_geo_legacy_point_separate_cc;
+
+  static bNodeType ntype;
+
+  geo_node_type_base(
+      &ntype, GEO_NODE_LEGACY_POINT_SEPARATE, "Point Separate", NODE_CLASS_GEOMETRY, 0);
+  ntype.declare = file_ns::node_declare;
+  ntype.geometry_node_execute = file_ns::node_geo_exec;
+  ntype.geometry_node_execute_supports_laziness = true;
+  nodeRegisterType(&ntype);
+}