Curves: support sculpting on deformed curves

Previously, curves sculpt tools only worked on original data. This was
very limiting, because one could effectively only sculpt the curves when
all procedural effects were turned off. This patch adds support for curves
sculpting while looking the result of procedural effects (like deformation
based on the surface mesh). This functionality is also known as "crazy space"
support in Blender.

For more details see D15407.

Differential Revision: https://developer.blender.org/D15407

1 files changed, 35 insertions, 0 deletions

diff --git a/source/blender/blenkernel/intern/geometry_set.cc b/source/blender/blenkernel/intern/geometry_set.cc
index c6fe8eebc7f..1a0ce4f0893 100644
--- a/source/blender/blenkernel/intern/geometry_set.cc
+++ b/source/blender/blenkernel/intern/geometry_set.cc
@@ -53,6 +53,8 @@ GeometryComponent *GeometryComponent::create(GeometryComponentType component_typ
       return new VolumeComponent();
     case GEO_COMPONENT_TYPE_CURVE:
       return new CurveComponent();
+    case GEO_COMPONENT_TYPE_EDIT:
+      return new GeometryComponentEditData();
   }
   BLI_assert_unreachable();
   return nullptr;
@@ -175,6 +177,20 @@ void GeometrySet::keep_only(const blender::Span<GeometryComponentType> component
   }
 }
 
+void GeometrySet::keep_only_during_modify(
+    const blender::Span<GeometryComponentType> component_types)
+{
+  Vector<GeometryComponentType> extended_types = component_types;
+  extended_types.append_non_duplicates(GEO_COMPONENT_TYPE_INSTANCES);
+  extended_types.append_non_duplicates(GEO_COMPONENT_TYPE_EDIT);
+  this->keep_only(extended_types);
+}
+
+void GeometrySet::remove_geometry_during_modify()
+{
+  this->keep_only_during_modify({});
+}
+
 void GeometrySet::add(const GeometryComponent &component)
 {
   BLI_assert(!components_[component.type()]);
@@ -290,6 +306,13 @@ const Curves *GeometrySet::get_curves_for_read() const
   return (component == nullptr) ? nullptr : component->get_for_read();
 }
 
+const blender::bke::CurvesEditHints *GeometrySet::get_curve_edit_hints_for_read() const
+{
+  const GeometryComponentEditData *component =
+      this->get_component_for_read<GeometryComponentEditData>();
+  return (component == nullptr) ? nullptr : component->curves_edit_hints_.get();
+}
+
 bool GeometrySet::has_pointcloud() const
 {
   const PointCloudComponent *component = this->get_component_for_read<PointCloudComponent>();
@@ -453,6 +476,16 @@ Curves *GeometrySet::get_curves_for_write()
   return component == nullptr ? nullptr : component->get_for_write();
 }
 
+blender::bke::CurvesEditHints *GeometrySet::get_curve_edit_hints_for_write()
+{
+  if (!this->has<GeometryComponentEditData>()) {
+    return nullptr;
+  }
+  GeometryComponentEditData &component =
+      this->get_component_for_write<GeometryComponentEditData>();
+  return component.curves_edit_hints_.get();
+}
+
 void GeometrySet::attribute_foreach(const Span<GeometryComponentType> component_types,
                                     const bool include_instances,
                                     const AttributeForeachCallback callback) const
@@ -679,6 +712,8 @@ bool BKE_object_has_geometry_set_instances(const Object *ob)
       case GEO_COMPONENT_TYPE_CURVE:
         is_instance = !ELEM(ob->type, OB_CURVES_LEGACY, OB_FONT);
         break;
+      case GEO_COMPONENT_TYPE_EDIT:
+        break;
     }
     if (is_instance) {
       return true;