1 files changed, 58 insertions, 0 deletions
diff --git a/source/blender/nodes/geometry/nodes/node_geo_curve_length.cc b/source/blender/nodes/geometry/nodes/node_geo_curve_length.cc
new file mode 100644
index 00000000000..306085e3b75
--- /dev/null
+++ b/source/blender/nodes/geometry/nodes/node_geo_curve_length.cc
@@ -0,0 +1,58 @@
+/*
+ * 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_spline.hh"
+#include "node_geometry_util.hh"
+
+static bNodeSocketTemplate geo_node_curve_length_in[] = {
+    {SOCK_GEOMETRY, N_("Curve")},
+    {-1, ""},
+};
+
+static bNodeSocketTemplate geo_node_curve_length_out[] = {
+    {SOCK_FLOAT, N_("Length")},
+    {-1, ""},
+};
+
+namespace blender::nodes {
+
+static void geo_node_curve_length_exec(GeoNodeExecParams params)
+{
+  GeometrySet curve_set = params.extract_input<GeometrySet>("Curve");
+  curve_set = bke::geometry_set_realize_instances(curve_set);
+  if (!curve_set.has_curve()) {
+    params.set_output("Length", 0.0f);
+    return;
+  }
+  const CurveEval &curve = *curve_set.get_curve_for_read();
+  float length = 0.0f;
+  for (const SplinePtr &spline : curve.splines()) {
+    length += spline->length();
+  }
+  params.set_output("Length", length);
+}
+
+}  // namespace blender::nodes
+
+void register_node_type_geo_curve_length()
+{
+  static bNodeType ntype;
+
+  geo_node_type_base(&ntype, GEO_NODE_CURVE_LENGTH, "Curve Length", NODE_CLASS_GEOMETRY, 0);
+  node_type_socket_templates(&ntype, geo_node_curve_length_in, geo_node_curve_length_out);
+  ntype.geometry_node_execute = blender::nodes::geo_node_curve_length_exec;
+  nodeRegisterType(&ntype);
+}