Objects: add Volume object type, and prototypes for Hair and PointCloud

Only the volume object is exposed in the user interface. It is based on OpenVDB
internally. Drawing and rendering code will follow in another commit.
https://wiki.blender.org/wiki/Source/Objects/Volume
https://wiki.blender.org/wiki/Reference/Release_Notes/2.83/Volumes

Hair and PointCloud object types are hidden behind a WITH_NEW_OBJECT_TYPES
build option. These are unfinished, and included only to make it easier to
cooperate on development in the future and avoid tricky merges.
https://wiki.blender.org/wiki/Source/Objects/New_Object_Types

Ref T73201, T68981

Differential Revision: https://developer.blender.org/D6945

1 files changed, 244 insertions, 0 deletions

diff --git a/source/blender/makesrna/intern/rna_hair.c b/source/blender/makesrna/intern/rna_hair.c
new file mode 100644
index 00000000000..13f3132b7b8
--- /dev/null
+++ b/source/blender/makesrna/intern/rna_hair.c
@@ -0,0 +1,244 @@
+/*
+ * ***** BEGIN GPL LICENSE BLOCK *****
+ *
+ * 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.
+ *
+ * Contributor(s): Jörg Müller.
+ *
+ * ***** END GPL LICENSE BLOCK *****
+ */
+
+/** \file blender/makesrna/intern/rna_hair.c
+ *  \ingroup RNA
+ */
+
+#include <stdlib.h>
+
+#include "RNA_define.h"
+#include "RNA_enum_types.h"
+
+#include "rna_internal.h"
+
+#include "DNA_hair_types.h"
+
+#include "BLI_math_base.h"
+#include "BLI_string.h"
+
+#ifdef RNA_RUNTIME
+
+#  include "BLI_math_vector.h"
+
+#  include "BKE_hair.h"
+
+#  include "DEG_depsgraph.h"
+
+#  include "WM_api.h"
+#  include "WM_types.h"
+
+static Hair *rna_hair(PointerRNA *ptr)
+{
+  return (Hair *)ptr->owner_id;
+}
+
+static int rna_HairPoint_index_get(PointerRNA *ptr)
+{
+  const Hair *hair = rna_hair(ptr);
+  const float(*co)[3] = ptr->data;
+  return (int)(co - hair->co);
+}
+
+static void rna_HairPoint_location_get(PointerRNA *ptr, float value[3])
+{
+  copy_v3_v3(value, (const float *)ptr->data);
+}
+
+static void rna_HairPoint_location_set(PointerRNA *ptr, const float value[3])
+{
+  copy_v3_v3((float *)ptr->data, value);
+}
+
+static float rna_HairPoint_radius_get(PointerRNA *ptr)
+{
+  const Hair *hair = rna_hair(ptr);
+  if (hair->radius == NULL) {
+    return 0.0f;
+  }
+  const float(*co)[3] = ptr->data;
+  return hair->radius[co - hair->co];
+}
+
+static void rna_HairPoint_radius_set(PointerRNA *ptr, float value)
+{
+  const Hair *hair = rna_hair(ptr);
+  if (hair->radius == NULL) {
+    return;
+  }
+  const float(*co)[3] = ptr->data;
+  hair->radius[co - hair->co] = value;
+}
+
+static char *rna_HairPoint_path(PointerRNA *ptr)
+{
+  return BLI_sprintfN("points[%d]", rna_HairPoint_index_get(ptr));
+}
+
+static int rna_HairCurve_index_get(PointerRNA *ptr)
+{
+  Hair *hair = rna_hair(ptr);
+  return (int)((HairCurve *)ptr->data - hair->curves);
+}
+
+static char *rna_HairCurve_path(PointerRNA *ptr)
+{
+  return BLI_sprintfN("curves[%d]", rna_HairCurve_index_get(ptr));
+}
+
+static void rna_HairCurve_points_begin(CollectionPropertyIterator *iter, PointerRNA *ptr)
+{
+  Hair *hair = rna_hair(ptr);
+  HairCurve *curve = ptr->data;
+  float(*co)[3] = hair->co + curve->firstpoint;
+  rna_iterator_array_begin(iter, co, sizeof(float[3]), curve->numpoints, 0, NULL);
+}
+
+static int rna_HairCurve_points_length(PointerRNA *ptr)
+{
+  HairCurve *curve = ptr->data;
+  return curve->numpoints;
+}
+
+static void rna_Hair_update_data(struct Main *UNUSED(bmain),
+                                 struct Scene *UNUSED(scene),
+                                 PointerRNA *ptr)
+{
+  ID *id = ptr->owner_id;
+
+  /* cheating way for importers to avoid slow updates */
+  if (id->us > 0) {
+    DEG_id_tag_update(id, 0);
+    WM_main_add_notifier(NC_GEOM | ND_DATA, id);
+  }
+}
+
+#else
+
+static void rna_def_hair_point(BlenderRNA *brna)
+{
+  StructRNA *srna;
+  PropertyRNA *prop;
+
+  srna = RNA_def_struct(brna, "HairPoint", NULL);
+  RNA_def_struct_ui_text(srna, "Hair Point", "Hair curve control point");
+  RNA_def_struct_path_func(srna, "rna_HairPoint_path");
+
+  prop = RNA_def_property(srna, "co", PROP_FLOAT, PROP_TRANSLATION);
+  RNA_def_property_array(prop, 3);
+  RNA_def_property_float_funcs(
+      prop, "rna_HairPoint_location_get", "rna_HairPoint_location_set", NULL);
+  RNA_def_property_ui_text(prop, "Location", "");
+  RNA_def_property_update(prop, 0, "rna_Hair_update_data");
+
+  prop = RNA_def_property(srna, "radius", PROP_FLOAT, PROP_DISTANCE);
+  RNA_def_property_float_funcs(prop, "rna_HairPoint_radius_get", "rna_HairPoint_radius_set", NULL);
+  RNA_def_property_ui_text(prop, "Radius", "");
+  RNA_def_property_update(prop, 0, "rna_Hair_update_data");
+
+  prop = RNA_def_property(srna, "index", PROP_INT, PROP_UNSIGNED);
+  RNA_def_property_clear_flag(prop, PROP_EDITABLE);
+  RNA_def_property_int_funcs(prop, "rna_HairPoint_index_get", NULL, NULL);
+  RNA_def_property_ui_text(prop, "Index", "Index of this points");
+}
+
+static void rna_def_hair_curve(BlenderRNA *brna)
+{
+  StructRNA *srna;
+  PropertyRNA *prop;
+
+  srna = RNA_def_struct(brna, "HairCurve", NULL);
+  RNA_def_struct_ui_text(srna, "Hair Curve", "Hair curve");
+  RNA_def_struct_path_func(srna, "rna_HairCurve_path");
+
+  prop = RNA_def_property(srna, "points", PROP_COLLECTION, PROP_NONE);
+  RNA_def_property_struct_type(prop, "HairPoint");
+  RNA_def_property_ui_text(prop, "Points", "Control points of the curve");
+  RNA_def_property_collection_funcs(prop,
+                                    "rna_HairCurve_points_begin",
+                                    "rna_iterator_array_next",
+                                    "rna_iterator_array_end",
+                                    "rna_iterator_array_get",
+                                    "rna_HairCurve_points_length",
+                                    NULL,
+                                    NULL,
+                                    NULL);
+
+  /* TODO: naming consistency, editable? */
+  prop = RNA_def_property(srna, "first_point_index", PROP_INT, PROP_UNSIGNED);
+  RNA_def_property_int_sdna(prop, NULL, "firstpoint");
+  RNA_def_property_ui_text(prop, "First Point Index", "Index of the first loop of this polygon");
+
+  prop = RNA_def_property(srna, "num_points", PROP_INT, PROP_UNSIGNED);
+  RNA_def_property_int_sdna(prop, NULL, "numpoints");
+  RNA_def_property_ui_text(prop, "Number of Points", "Number of loops used by this polygon");
+
+  prop = RNA_def_property(srna, "index", PROP_INT, PROP_UNSIGNED);
+  RNA_def_property_clear_flag(prop, PROP_EDITABLE);
+  RNA_def_property_int_funcs(prop, "rna_HairCurve_index_get", NULL, NULL);
+  RNA_def_property_ui_text(prop, "Index", "Index of this curve");
+}
+
+static void rna_def_hair(BlenderRNA *brna)
+{
+  StructRNA *srna;
+  PropertyRNA *prop;
+
+  srna = RNA_def_struct(brna, "Hair", "ID");
+  RNA_def_struct_ui_text(srna, "Hair", "Hair data-block for hair curves");
+  RNA_def_struct_ui_icon(srna, ICON_HAIR_DATA);
+
+  /* geometry */
+  prop = RNA_def_property(srna, "curves", PROP_COLLECTION, PROP_NONE);
+  RNA_def_property_collection_sdna(prop, NULL, "curves", "totcurve");
+  RNA_def_property_struct_type(prop, "HairCurve");
+  RNA_def_property_ui_text(prop, "Curves", "All hair curves");
+
+  /* TODO: better solution for (*co)[3] parsing issue. */
+  RNA_define_verify_sdna(0);
+  prop = RNA_def_property(srna, "points", PROP_COLLECTION, PROP_NONE);
+  RNA_def_property_collection_sdna(prop, NULL, "co", "totpoint");
+  RNA_def_property_struct_type(prop, "HairPoint");
+  RNA_def_property_ui_text(prop, "Points", "Control points of all hair curves");
+  RNA_define_verify_sdna(1);
+
+  /* materials */
+  prop = RNA_def_property(srna, "materials", PROP_COLLECTION, PROP_NONE);
+  RNA_def_property_collection_sdna(prop, NULL, "mat", "totcol");
+  RNA_def_property_struct_type(prop, "Material");
+  RNA_def_property_ui_text(prop, "Materials", "");
+  RNA_def_property_srna(prop, "IDMaterials"); /* see rna_ID.c */
+  RNA_def_property_collection_funcs(
+      prop, NULL, NULL, NULL, NULL, NULL, NULL, NULL, "rna_IDMaterials_assign_int");
+
+  /* common */
+  rna_def_animdata_common(srna);
+}
+
+void RNA_def_hair(BlenderRNA *brna)
+{
+  rna_def_hair_point(brna);
+  rna_def_hair_curve(brna);
+  rna_def_hair(brna);
+}
+
+#endif