patch #31794 Added new function BKE_object_relational_superset()

source/blender/blenkernel/BKE_object.h

@@ -158,6 +158,26 @@ void BKE_object_relink(struct Object *ob);
 
 struct MovieClip *BKE_object_movieclip_get(struct Scene *scene, struct Object *ob, int use_default);
 
+/* this function returns a superset of the scenes selection based on relationships */
+
+typedef enum eObRelationTypes {
+	OB_REL_NONE               = 0,      /* just the selection as is */
+	OB_REL_PARENT             = (1<<0), /* immediate parent */
+	OB_REL_PARENT_RECURSIVE   = (1<<1), /* parents up to root of selection tree*/
+	OB_REL_CHILDREN           = (1<<2), /* immediate children */
+	OB_REL_CHILDREN_RECURSIVE = (1<<3), /* All children */
+	OB_REL_MOD_ARMATURE       = (1<<4), /* Armatures related to the selected objects */
+	OB_REL_SCENE_CAMERA       = (1<<5), /* you might want the scene camera too even if unselected? */
+} eObRelationTypes;
+
+typedef enum eObjectSet {
+	OB_SET_SELECTED, /* Selected Objects */
+	OB_SET_VISIBLE,  /* Visible Objects  */
+	OB_SET_ALL       /* All Objects      */
+} eObjectSet;
+
+struct LinkNode *BKE_object_relational_superset(struct Scene *scene, eObjectSet objectSet, eObRelationTypes includeFilter);
+
 #ifdef __cplusplus
 }
 #endif

source/blender/blenkernel/intern/object.c

@@ -63,6 +63,7 @@
 #include "BLI_math.h"
 #include "BLI_pbvh.h"
 #include "BLI_utildefines.h"
+#include "BLI_linklist.h"
 
 #include "BKE_main.h"
 #include "BKE_global.h"
@@ -3076,3 +3077,136 @@ MovieClip *BKE_object_movieclip_get(Scene *scene, Object *ob, int use_default)
 
 	return clip;
 }
+
+
+/*
+ * Find an associated Armature object
+ */
+static Object *obrel_armature_find(Object *ob)
+{
+	Object *ob_arm = NULL;
+
+	if (ob->parent && ob->partype == PARSKEL && ob->parent->type == OB_ARMATURE) {
+		ob_arm = ob->parent;
+	}
+	else {
+		ModifierData *mod = (ModifierData*)ob->modifiers.first;
+		while (mod) {
+			if (mod->type == eModifierType_Armature) {
+				ob_arm = ((ArmatureModifierData*)mod)->object;
+			}
+
+			mod = mod->next;
+		}
+	}
+
+	return ob_arm;
+}
+
+static int obrel_is_recursive_child(Object *ob, Object *child) {
+	Object *ancestor = child->parent;
+	while (ancestor)
+	{
+		if(ancestor == ob) return TRUE;
+		ancestor = ancestor->parent;
+	}
+	return FALSE;
+}
+
+
+static int obrel_list_test(Object *ob)
+{
+	return ob && !(ob->id.flag & LIB_DOIT);
+}
+
+static void obrel_list_add(LinkNode **links, Object *ob)
+{
+	BLI_linklist_prepend(links, ob);
+	ob->id.flag |= LIB_DOIT;
+}
+
+/*
+ * Iterates over all objects of the given scene.
+ * Depending on the eObjectSet flag:
+ * collect either OB_SET_ALL, OB_SET_VISIBLE or OB_SET_SELECTED objects.
+ * If OB_SET_VISIBLE or OB_SET_SELECTED are collected, 
+ * then also add related objects according to the given includeFilters.
+ */
+struct LinkNode *BKE_object_relational_superset(struct Scene *scene, eObjectSet objectSet, eObRelationTypes includeFilter)
+{
+	LinkNode *links = NULL;
+
+	Base *base;
+
+	/* Remove markers from all objects */
+	for (base = scene->base.first; base; base = base->next) {
+		base->object->id.flag &= ~LIB_DOIT;
+	}
+
+	/* iterate over all selected and visible objects */
+	for (base = scene->base.first; base; base = base->next) {
+		if (objectSet == OB_SET_ALL) {
+			// as we get all anyways just add it
+			Object *ob = base->object;
+			obrel_list_add(&links, ob);
+		}
+		else {
+			if ( (objectSet == OB_SET_SELECTED && TESTBASELIB_BGMODE(((View3D *)NULL), scene, base))
+			||   (objectSet == OB_SET_VISIBLE  && BASE_EDITABLE_BGMODE(((View3D *)NULL), scene, base))
+				) {
+				Object *ob = base->object;
+
+				if (obrel_list_test(ob))
+					obrel_list_add(&links, ob);
+
+				/* parent relationship */
+				if (includeFilter & ( OB_REL_PARENT | OB_REL_PARENT_RECURSIVE )) {
+					Object *parent = ob->parent;
+					if (obrel_list_test(parent)) {
+
+						obrel_list_add(&links, parent);
+
+						/* recursive parent relationship */
+						if (includeFilter & OB_REL_PARENT_RECURSIVE) {
+							parent = parent->parent;
+							while (obrel_list_test(parent)){
+
+								obrel_list_add(&links, parent);
+								parent = parent->parent;
+							}
+						}
+					}
+				}
+
+				/* child relationship */
+				if (includeFilter & ( OB_REL_CHILDREN | OB_REL_CHILDREN_RECURSIVE )) {
+					Base *local_base;
+					for (local_base = scene->base.first; local_base; local_base = local_base->next) {
+						if (BASE_EDITABLE_BGMODE(((View3D *)NULL), scene, local_base)) {
+
+							Object *child = local_base->object;
+							if (obrel_list_test(child)) {
+								if ((includeFilter & OB_REL_CHILDREN_RECURSIVE && obrel_is_recursive_child(ob,child))
+								||  (includeFilter & OB_REL_CHILDREN && child->parent && child->parent == ob )) {
+									obrel_list_add(&links, child);
+								}
+							}
+						}
+					}
+				}
+
+
+				/* include related armatures */
+				if (includeFilter & OB_REL_MOD_ARMATURE) {
+					Object *arm = obrel_armature_find(ob);
+					if (obrel_list_test(arm)) {
+						obrel_list_add(&links, arm);
+					}
+				}
+
+			}
+		}
+	} // end for
+
+	return links;
+}