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Geometry Nodes: Curve Length Node

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This commit adds a node that outputs the total length of all
evalauted curve splines in a geometry set as a float value.

Differential Revision: https://developer.blender.org/D11459
This commit is contained in:
Johnny Matthews 2021-06-03 19:12:38 -04:00 committed by Hans Goudey
parent e5a1cadb2f
commit ddd4b2b785
7 changed files with 64 additions and 0 deletions
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1
release/scripts/startup/nodeitems_builtins.py
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@ -504,6 +504,7 @@ geometry_node_categories = [
NodeItem("GeometryNodeCurveToMesh"),
NodeItem("GeometryNodeCurveResample"),
NodeItem("GeometryNodeMeshToCurve"),
NodeItem("GeometryNodeCurveLength"),
]),
GeometryNodeCategory("GEO_GEOMETRY", "Geometry", items=[
NodeItem("GeometryNodeBoundBox"),

1
source/blender/blenkernel/BKE_node.h
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@ -1431,6 +1431,7 @@ int ntreeTexExecTree(struct bNodeTree *ntree,
#define GEO_NODE_MATERIAL_REPLACE 1051
#define GEO_NODE_MESH_TO_CURVE 1052
#define GEO_NODE_DELETE_GEOMETRY 1053
#define GEO_NODE_CURVE_LENGTH 1054
/** \} */

1
source/blender/blenkernel/intern/node.cc
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@ -5050,6 +5050,7 @@ static void registerGeometryNodes()
register_node_type_geo_boolean();
register_node_type_geo_bounding_box();
register_node_type_geo_collection_info();
register_node_type_geo_curve_length();
register_node_type_geo_curve_to_mesh();
register_node_type_geo_curve_resample();
register_node_type_geo_delete_geometry();

1
source/blender/nodes/CMakeLists.txt
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@ -162,6 +162,7 @@ set(SRC
geometry/nodes/node_geo_bounding_box.cc
geometry/nodes/node_geo_collection_info.cc
geometry/nodes/node_geo_common.cc
geometry/nodes/node_geo_curve_length.cc
geometry/nodes/node_geo_curve_to_mesh.cc
geometry/nodes/node_geo_curve_resample.cc
geometry/nodes/node_geo_delete_geometry.cc

1
source/blender/nodes/NOD_geometry.h
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@ -50,6 +50,7 @@ void register_node_type_geo_attribute_remove(void);
void register_node_type_geo_boolean(void);
void register_node_type_geo_bounding_box(void);
void register_node_type_geo_collection_info(void);
void register_node_type_geo_curve_length(void);
void register_node_type_geo_curve_to_mesh(void);
void register_node_type_geo_curve_resample(void);
void register_node_type_geo_delete_geometry(void);

1
source/blender/nodes/NOD_static_types.h
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@ -289,6 +289,7 @@ DefNode(GeometryNode, GEO_NODE_ATTRIBUTE_VECTOR_ROTATE, def_geo_attribute_vector
DefNode(GeometryNode, GEO_NODE_BOOLEAN, def_geo_boolean, "BOOLEAN", Boolean, "Boolean", "")
DefNode(GeometryNode, GEO_NODE_BOUNDING_BOX, 0, "BOUNDING_BOX", BoundBox, "Bounding Box", "")
DefNode(GeometryNode, GEO_NODE_COLLECTION_INFO, def_geo_collection_info, "COLLECTION_INFO", CollectionInfo, "Collection Info", "")
DefNode(GeometryNode, GEO_NODE_CURVE_LENGTH, 0, "CURVE_LENGTH", CurveLength, "Curve Length", "")
DefNode(GeometryNode, GEO_NODE_CURVE_RESAMPLE, def_geo_curve_resample, "CURVE_RESAMPLE", CurveResample, "Resample Curve", "")
DefNode(GeometryNode, GEO_NODE_CURVE_TO_MESH, 0, "CURVE_TO_MESH", CurveToMesh, "Curve to Mesh", "")
DefNode(GeometryNode, GEO_NODE_DELETE_GEOMETRY, 0, "DELETE_GEOMETRY", DeleteGeometry, "Delete Geometry", "")

58
source/blender/nodes/geometry/nodes/node_geo_curve_length.cc Normal file
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@ -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);
}