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fix(collision): sort events in ascending order #367

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fix(collision): sort events in ascending order #367

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4c2ec83
fix(collision): sort events in ascending order
cobaltgit Jul 29, 2026
ec62f9b
fix
cobaltgit Jul 29, 2026
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19 changes: 16 additions & 3 deletions src/runner.c
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Original file line number Diff line number Diff line change
Expand Up @@ -3081,12 +3081,24 @@ static int sortInstancesByObjectIndexThenInstanceIdAscending(const void* element
return 0;
}

static int compareIntsAscending(const void* a, const void* b) {
int32_t ia = *(const int32_t*)a;
int32_t ib = *(const int32_t*)b;
return (ia > ib) - (ia < ib);
}

static void dispatchCollisionEvents(Runner* runner) {
DataWin* dataWin = runner->dataWin;
// Iterate only the objects that have any collision event in their parent chain.
int32_t* selfObjects = (runner->objectsWithAnyEventOfType != nullptr) ? runner->objectsWithAnyEventOfType[EVENT_COLLISION] : nullptr;
if (selfObjects == nullptr) return;
int32_t selfObjCount = (int32_t) arrlen(selfObjects);
int32_t* allSelfObjects = (runner->objectsWithAnyEventOfType != nullptr) ? runner->objectsWithAnyEventOfType[EVENT_COLLISION] : nullptr;
if (allSelfObjects == nullptr) return;
int32_t selfObjCount = (int32_t) arrlen(allSelfObjects);
if (selfObjCount == 0) return;

// Copy and sort by ascending object index so collision dispatch order matches the native runner's slot-index order.
int32_t* selfObjects = (int32_t*)safeMalloc((size_t)selfObjCount * sizeof(int32_t));
memcpy(selfObjects, allSelfObjects, (size_t)selfObjCount * sizeof(int32_t));
qsort(selfObjects, (size_t)selfObjCount, sizeof(int32_t), compareIntsAscending);

repeat(selfObjCount, soIdx) {
int32_t selfObjIdx = selfObjects[soIdx];
Expand Down Expand Up @@ -3273,6 +3285,7 @@ static void dispatchCollisionEvents(Runner* runner) {

arrsetlen(runner->instanceSnapshots, selfSnapBase);
}
free(selfObjects);
}

// ===[ View Following + Clamping ]===
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