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[ecs] Optionally delete entities on hierarchy removal

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Useful for deleting an entire sub-hierarchy of entities.
This commit is contained in:
Bill Currie 2022-11-08 00:16:29 +09:00
parent 4197d4a800
commit 24d8d864a2
2 changed files with 17 additions and 6 deletions
include/QF/ecs
hierarchy.h
libs/ecs
hierarchy.c

3
include/QF/ecs/hierarchy.h
View file

@ -71,7 +71,8 @@ void Hierarchy_Delete (hierarchy_t *hierarchy);
uint32_t Hierarchy_InsertHierarchy (hierarchy_t *dst, const hierarchy_t *src,
uint32_t dstParent, uint32_t srcRoot);
void Hierarchy_RemoveHierarchy (hierarchy_t *hierarchy, uint32_t index);
void Hierarchy_RemoveHierarchy (hierarchy_t *hierarchy, uint32_t index,
int delEntities);
hierref_t Hierarchy_SetParent (hierarchy_t *dst, uint32_t dstParent,
hierarchy_t *src, uint32_t srcIndex);

20
libs/ecs/hierarchy.c
View file

@ -316,13 +316,19 @@ Hierarchy_InsertHierarchy (hierarchy_t *dst, const hierarchy_t *src,
}
static void
hierarchy_remove_children (hierarchy_t *hierarchy, uint32_t index)
hierarchy_remove_children (hierarchy_t *hierarchy, uint32_t index,
int delEntities)
{
uint32_t childIndex = hierarchy->childIndex[index];
uint32_t childCount = hierarchy->childCount[index];
for (uint32_t i = childCount; i-- > 0; ) {
hierarchy_remove_children (hierarchy, childIndex + i);
hierarchy_remove_children (hierarchy, childIndex + i, delEntities);
}
if (delEntities) {
for (uint32_t i = 0; i < childCount; i++) {
ECS_DelEntity (hierarchy->reg, hierarchy->ent[childIndex + i]);
}
}
hierarchy_close (hierarchy, childIndex, childCount);
hierarchy->childCount[index] = 0;
@ -337,11 +343,15 @@ hierarchy_remove_children (hierarchy_t *hierarchy, uint32_t index)
}
void
Hierarchy_RemoveHierarchy (hierarchy_t *hierarchy, uint32_t index)
Hierarchy_RemoveHierarchy (hierarchy_t *hierarchy, uint32_t index,
int delEntities)
{
uint32_t parentIndex = hierarchy->parentIndex[index];
hierarchy_remove_children (hierarchy, index);
hierarchy_remove_children (hierarchy, index, delEntities);
if (delEntities) {
ECS_DelEntity (hierarchy->reg, hierarchy->ent[index]);
}
hierarchy_close (hierarchy, index, 1);
hierarchy_UpdateTransformIndices (hierarchy, index, -1);
@ -442,7 +452,7 @@ Hierarchy_SetParent (hierarchy_t *dst, uint32_t dstParent,
}
r.hierarchy = dst;
r.index = hierarchy_insertHierarchy (dst, src, dstParent, &srcRoot);
Hierarchy_RemoveHierarchy (src, srcRoot);
Hierarchy_RemoveHierarchy (src, srcRoot, 0);
if (!src->num_objects) {
Hierarchy_Delete (src);
}