Geometry Nodes: Handle Type Selection Node Update

This node creates a boolean field selection of bezier spline points
that have a handle of the given type on the selected 'side' of the
contol point. This is evaluated on the point domain.

Differential Revision: https://developer.blender.org/D12559

release/scripts/startup/nodeitems_builtins.py

@@ -532,6 +532,7 @@ geometry_node_categories = [
         NodeItem("GeometryNodeCurveSetHandles"),
         NodeItem("GeometryNodeInputTangent"),
         NodeItem("GeometryNodeCurveSample"),
+        NodeItem("GeometryNodeCurveHandleTypeSelection"),
         NodeItem("GeometryNodeCurveFillet"),
         NodeItem("GeometryNodeCurveReverse"),
     ]),

source/blender/blenkernel/BKE_node.h

@@ -1514,6 +1514,7 @@ int ntreeTexExecTree(struct bNodeTree *ntree,
 #define GEO_NODE_CURVE_SPLINE_TYPE 1099
 #define GEO_NODE_CURVE_SET_HANDLES 1100
 #define GEO_NODE_POINTS_TO_VOLUME 1101
+#define GEO_NODE_CURVE_HANDLE_TYPE_SELECTION 1102
 /** \} */
 
 /* -------------------------------------------------------------------- */

source/blender/blenkernel/intern/node.cc

@@ -5717,8 +5717,8 @@ static void registerGeometryNodes()
   register_node_type_geo_legacy_select_by_material();
   register_node_type_geo_legacy_curve_spline_type();
   register_node_type_geo_legacy_curve_reverse();
+  register_node_type_geo_legacy_select_by_handle_type();
   register_node_type_geo_legacy_curve_subdivide();
-
   register_node_type_geo_align_rotation_to_vector();
   register_node_type_geo_attribute_capture();
   register_node_type_geo_attribute_clamp();
@@ -5744,6 +5744,7 @@ static void registerGeometryNodes()
   register_node_type_geo_curve_endpoints();
   register_node_type_geo_curve_fill();
   register_node_type_geo_curve_fillet();
+  register_node_type_geo_curve_handle_type_selection();
   register_node_type_geo_curve_length();
   register_node_type_geo_curve_parameter();
   register_node_type_geo_curve_primitive_bezier_segment();
@@ -5801,7 +5802,6 @@ static void registerGeometryNodes()
   register_node_type_geo_raycast();
   register_node_type_geo_realize_instances();
   register_node_type_geo_sample_texture();
-  register_node_type_geo_select_by_handle_type();
   register_node_type_geo_separate_components();
   register_node_type_geo_set_position();
   register_node_type_geo_string_join();

source/blender/makesrna/intern/rna_nodetree.c

@@ -9706,6 +9706,24 @@ static void def_geo_curve_select_handles(StructRNA *srna)
   RNA_def_property_update(prop, NC_NODE | NA_EDITED, "rna_Node_socket_update");
 }
 
+static void def_geo_curve_handle_type_selection(StructRNA *srna)
+{
+  PropertyRNA *prop;
+
+  RNA_def_struct_sdna_from(srna, "NodeGeometryCurveSelectHandles", "storage");
+
+  prop = RNA_def_property(srna, "handle_type", PROP_ENUM, PROP_NONE);
+  RNA_def_property_enum_sdna(prop, NULL, "handle_type");
+  RNA_def_property_enum_items(prop, rna_node_geometry_curve_handle_type_items);
+  RNA_def_property_update(prop, NC_NODE | NA_EDITED, "rna_Node_socket_update");
+
+  prop = RNA_def_property(srna, "mode", PROP_ENUM, PROP_NONE);
+  RNA_def_property_enum_items(prop, rna_node_geometry_curve_handle_side_items);
+  RNA_def_property_ui_text(prop, "Mode", "Whether to check the type of left and right handles");
+  RNA_def_property_flag(prop, PROP_ENUM_FLAG);
+  RNA_def_property_update(prop, NC_NODE | NA_EDITED, "rna_Node_socket_update");
+}
+
 static void def_geo_curve_primitive_circle(StructRNA *srna)
 {
   static const EnumPropertyItem mode_items[] = {

source/blender/nodes/CMakeLists.txt

@@ -198,6 +198,7 @@ set(SRC
   geometry/nodes/node_geo_convex_hull.cc
   geometry/nodes/node_geo_curve_fill.cc
   geometry/nodes/node_geo_curve_fillet.cc
+  geometry/nodes/node_geo_curve_handle_type_selection.cc
   geometry/nodes/node_geo_curve_length.cc
   geometry/nodes/node_geo_curve_parameter.cc
   geometry/nodes/node_geo_curve_primitive_bezier_segment.cc

source/blender/nodes/NOD_geometry.h

@@ -37,6 +37,7 @@ void register_node_type_geo_legacy_points_to_volume(void);
 void register_node_type_geo_legacy_select_by_material(void);
 void register_node_type_geo_legacy_curve_spline_type(void);
 void register_node_type_geo_legacy_curve_reverse(void);
+void register_node_type_geo_legacy_select_by_handle_type(void);
 void register_node_type_geo_legacy_curve_subdivide(void);
 
 void register_node_type_geo_align_rotation_to_vector(void);
@@ -64,6 +65,7 @@ void register_node_type_geo_convex_hull(void);
 void register_node_type_geo_curve_endpoints(void);
 void register_node_type_geo_curve_fill(void);
 void register_node_type_geo_curve_fillet(void);
+void register_node_type_geo_curve_handle_type_selection(void);
 void register_node_type_geo_curve_length(void);
 void register_node_type_geo_curve_parameter(void);
 void register_node_type_geo_curve_primitive_bezier_segment(void);

source/blender/nodes/NOD_static_types.h

@@ -326,6 +326,7 @@ DefNode(GeometryNode, GEO_NODE_COLLECTION_INFO, def_geo_collection_info, "COLLEC
 DefNode(GeometryNode, GEO_NODE_CONVEX_HULL, 0, "CONVEX_HULL", ConvexHull, "Convex Hull", "")
 DefNode(GeometryNode, GEO_NODE_CURVE_FILL, def_geo_curve_fill, "CURVE_FILL", CurveFill, "Curve Fill", "")
 DefNode(GeometryNode, GEO_NODE_CURVE_FILLET, def_geo_curve_fillet, "CURVE_FILLET", CurveFillet, "Curve Fillet", "")
+DefNode(GeometryNode, GEO_NODE_CURVE_HANDLE_TYPE_SELECTION, def_geo_curve_handle_type_selection, "CURVE_HANDLE_TYPE_SELECTION", CurveHandleTypeSelection, "Handle Type Selection", "")
 DefNode(GeometryNode, GEO_NODE_CURVE_LENGTH, 0, "CURVE_LENGTH", CurveLength, "Curve Length", "")
 DefNode(GeometryNode, GEO_NODE_CURVE_PARAMETER, 0, "CURVE_PARAMETER", CurveParameter, "Curve Parameter", "")
 DefNode(GeometryNode, GEO_NODE_CURVE_PRIMITIVE_BEZIER_SEGMENT, def_geo_curve_primitive_bezier_segment, "CURVE_PRIMITIVE_BEZIER_SEGMENT", CurvePrimitiveBezierSegment, "Bezier Segment", "")

source/blender/nodes/geometry/nodes/legacy/node_geo_curve_select_by_handle_type.cc

@@ -123,7 +123,7 @@ static void geo_node_select_by_handle_type_exec(GeoNodeExecParams params)
 
 }  // namespace blender::nodes
 
-void register_node_type_geo_select_by_handle_type()
+void register_node_type_geo_legacy_select_by_handle_type()
 {
   static bNodeType ntype;
 

source/blender/nodes/geometry/nodes/node_geo_curve_handle_type_selection.cc

@@ -0,0 +1,180 @@
+/*
+ * 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 "BLI_task.hh"
+
+#include "BKE_spline.hh"
+
+#include "UI_interface.h"
+#include "UI_resources.h"
+
+#include "node_geometry_util.hh"
+
+namespace blender::nodes {
+
+static void geo_node_curve_handle_type_selection_declare(NodeDeclarationBuilder &b)
+{
+  b.add_output<decl::Bool>("Selection").field_source();
+}
+
+static void geo_node_curve_handle_type_selection_layout(uiLayout *layout,
+                                                        bContext *UNUSED(C),
+                                                        PointerRNA *ptr)
+{
+  uiItemR(layout, ptr, "mode", UI_ITEM_R_EXPAND, nullptr, ICON_NONE);
+  uiItemR(layout, ptr, "handle_type", 0, "", ICON_NONE);
+}
+
+static void geo_node_curve_handle_type_selection_init(bNodeTree *UNUSED(tree), bNode *node)
+{
+  NodeGeometryCurveSelectHandles *data = (NodeGeometryCurveSelectHandles *)MEM_callocN(
+      sizeof(NodeGeometryCurveSelectHandles), __func__);
+
+  data->handle_type = GEO_NODE_CURVE_HANDLE_AUTO;
+  data->mode = GEO_NODE_CURVE_HANDLE_LEFT | GEO_NODE_CURVE_HANDLE_RIGHT;
+  node->storage = data;
+}
+
+static BezierSpline::HandleType handle_type_from_input_type(const GeometryNodeCurveHandleType type)
+{
+  switch (type) {
+    case GEO_NODE_CURVE_HANDLE_AUTO:
+      return BezierSpline::HandleType::Auto;
+    case GEO_NODE_CURVE_HANDLE_ALIGN:
+      return BezierSpline::HandleType::Align;
+    case GEO_NODE_CURVE_HANDLE_FREE:
+      return BezierSpline::HandleType::Free;
+    case GEO_NODE_CURVE_HANDLE_VECTOR:
+      return BezierSpline::HandleType::Vector;
+  }
+  BLI_assert_unreachable();
+  return BezierSpline::HandleType::Auto;
+}
+
+static void select_by_handle_type(const CurveEval &curve,
+                                  const BezierSpline::HandleType type,
+                                  const GeometryNodeCurveHandleMode mode,
+                                  const IndexMask mask,
+                                  const MutableSpan<bool> r_selection)
+{
+  int offset = 0;
+  for (const SplinePtr &spline : curve.splines()) {
+    if (spline->type() != Spline::Type::Bezier) {
+      r_selection.slice(offset, spline->size()).fill(false);
+      offset += spline->size();
+    }
+    else {
+      BezierSpline *b = static_cast<BezierSpline *>(spline.get());
+      for (int i : IndexRange(b->size())) {
+        if (mode & GeometryNodeCurveHandleMode::GEO_NODE_CURVE_HANDLE_LEFT) {
+          r_selection[offset++] = b->handle_types_left()[i] == type;
+        }
+        else if (mode & GeometryNodeCurveHandleMode::GEO_NODE_CURVE_HANDLE_RIGHT) {
+          r_selection[offset++] = b->handle_types_right()[i] == type;
+        }
+      }
+    }
+  }
+}
+
+class HandleTypeFieldInput final : public fn::FieldInput {
+  BezierSpline::HandleType type_;
+  GeometryNodeCurveHandleMode mode_;
+
+ public:
+  HandleTypeFieldInput(BezierSpline::HandleType type, GeometryNodeCurveHandleMode mode)
+      : FieldInput(CPPType::get<bool>(), "Selection"), type_(type), mode_(mode)
+  {
+  }
+
+  const GVArray *get_varray_for_context(const fn::FieldContext &context,
+                                        IndexMask mask,
+                                        ResourceScope &scope) const final
+  {
+    if (const GeometryComponentFieldContext *geometry_context =
+            dynamic_cast<const GeometryComponentFieldContext *>(&context)) {
+
+      const GeometryComponent &component = geometry_context->geometry_component();
+      const AttributeDomain domain = geometry_context->domain();
+      if (component.type() != GEO_COMPONENT_TYPE_CURVE) {
+        return nullptr;
+      }
+
+      const CurveComponent &curve_component = static_cast<const CurveComponent &>(component);
+      const CurveEval *curve = curve_component.get_for_read();
+      if (curve == nullptr) {
+        return nullptr;
+      }
+
+      if (domain == ATTR_DOMAIN_POINT) {
+        Array<bool> selection(mask.min_array_size());
+        select_by_handle_type(*curve, type_, mode_, mask, selection);
+        return &scope.construct<fn::GVArray_For_ArrayContainer<Array<bool>>>(std::move(selection));
+      }
+    }
+    return nullptr;
+  };
+
+  uint64_t hash() const override
+  {
+    return get_default_hash_2((int)mode_, (int)type_);
+  }
+
+  bool is_equal_to(const fn::FieldNode &other) const override
+  {
+    return dynamic_cast<const HandleTypeFieldInput *>(&other) != nullptr;
+    if (const HandleTypeFieldInput *other_handle_selection =
+            dynamic_cast<const HandleTypeFieldInput *>(&other)) {
+      return mode_ == other_handle_selection->mode_ && type_ == other_handle_selection->type_;
+    }
+    return false;
+  }
+};
+
+static void geo_node_curve_handle_type_selection_exec(GeoNodeExecParams params)
+{
+  const NodeGeometryCurveSelectHandles *storage =
+      (const NodeGeometryCurveSelectHandles *)params.node().storage;
+  const BezierSpline::HandleType handle_type = handle_type_from_input_type(
+      (GeometryNodeCurveHandleType)storage->handle_type);
+  const GeometryNodeCurveHandleMode mode = (GeometryNodeCurveHandleMode)storage->mode;
+
+  Field<bool> selection_field{std::make_shared<HandleTypeFieldInput>(handle_type, mode)};
+  params.set_output("Selection", std::move(selection_field));
+}
+
+}  // namespace blender::nodes
+
+void register_node_type_geo_curve_handle_type_selection()
+{
+  static bNodeType ntype;
+
+  geo_node_type_base(&ntype,
+                     GEO_NODE_CURVE_HANDLE_TYPE_SELECTION,
+                     "Handle Type Selection",
+                     NODE_CLASS_GEOMETRY,
+                     0);
+  ntype.declare = blender::nodes::geo_node_curve_handle_type_selection_declare;
+  ntype.geometry_node_execute = blender::nodes::geo_node_curve_handle_type_selection_exec;
+  node_type_init(&ntype, blender::nodes::geo_node_curve_handle_type_selection_init);
+  node_type_storage(&ntype,
+                    "NodeGeometryCurveSelectHandles",
+                    node_free_standard_storage,
+                    node_copy_standard_storage);
+  ntype.draw_buttons = blender::nodes::geo_node_curve_handle_type_selection_layout;
+
+  nodeRegisterType(&ntype);
+}