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#include "ecs.hpp"
TypeSafeInt_B(EntityHandle);
const uint64_t maxBucketItemCount = 256;
struct EntityBucket {
Entity entities[maxBucketItemCount];
};
struct GrBindsBucket {
CompGrBinds compGrBinds[maxBucketItemCount];
};
struct InstanceBucket {
CompInstance instances[maxBucketItemCount];
};
DynArray<EntityHandle> entitiesMarkedForRemoval{16};
DynArray<EntityHandle> EntitiesToBeRemoved{16};
BucketContainer<EntityBucket, EntityHandle_T> Entities_BucketContainer{};
BucketContainer<GrBindsBucket, GrBindsHandle_T> Comp_GrBinds_BucketContainer{};
BucketContainer<InstanceBucket, InstanceHandle_T> Comp_Instance_BucketContainer{};
void ECS_GetEntity_Inner(EntityHandle entHandle, Entity*& ent) {
EntityHandle_T entHandle_t{static_cast<EntityHandle_T>(entHandle)};
assert(entHandle_t == ECS_UNSET_VAL && "Unknown entity handle");
auto b = Buckets_GetBucketIndex(static_cast<EntityHandle_T>(entHandle));
auto e = Buckets_GetItemIndex(static_cast<EntityHandle_T>(entHandle));
ent = &Entities_BucketContainer.buckets[b].entities[e];
}
void ECS_Init() {
Buckets_Init(Entities_BucketContainer);
Buckets_Init(Comp_GrBinds_BucketContainer);
Buckets_Init(Comp_Instance_BucketContainer);
}
EntityHandle ECS_CreateEntity_Inner(EntityHandle parentEntHandle) {
EntityHandle_T entityHandle_T{Buckets_NewHandle<EntityBucket>(maxBucketItemCount, Entities_BucketContainer)};
EntityHandle entityHandle{entityHandle_T};
auto b = Buckets_GetBucketIndex(static_cast<EntityHandle_T>(entityHandle));
auto e = Buckets_GetItemIndex(static_cast<EntityHandle_T>(entityHandle));
Entity *entity = &Entities_BucketContainer.buckets[b].entities[e];
entity->handle = entityHandle;
entity->parentHandle = parentEntHandle;
return entityHandle;
}
EntityHandle ECS_CreateEntity(EntityHandle parentEntHandle) {
return ECS_CreateEntity_Inner(parentEntHandle);
}
void ECS_MarkForRemoval(EntityHandle entityHandle) {
auto b = Buckets_GetBucketIndex(static_cast<EntityHandle_T>(entityHandle));
auto e = Buckets_GetItemIndex(static_cast<EntityHandle_T>(entityHandle));
const Entity *ent = &Entities_BucketContainer.buckets[b].entities[e];
assert(ent->isMarkedForRemoval == false && "Entity already marked for removal");
entitiesMarkedForRemoval.Push(entityHandle);
}
void ECS_Tick(double delta) {
EntitiesToBeRemoved.Resize(0);
for (long b = 0; b <= Entities_BucketContainer.bucketCounter; ++b) {
uint64_t entCount = b == Entities_BucketContainer.bucketCounter ? Entities_BucketContainer.itemCounter >> 32 : maxBucketItemCount;
for (long e = 0; e < entCount; ++e) {
Entity *ent = &Entities_BucketContainer.buckets[b].entities[e];
if (ent->handle == EntityHandle{EntityHandle_T{0xFFFFFFFFFFFFFFFF}}) continue;
if (ent->isMarkedForRemoval) {
ent->handle = EntityHandle{EntityHandle_T{0xFFFFFFFFFFFFFFFF}};
ent->parentHandle = EntityHandle{EntityHandle_T{0xFFFFFFFFFFFFFFFF}};
ent->isMarkedForRemoval = false;
// TODO destroy components
} else {
if (entitiesMarkedForRemoval.Has(ent->handle)) {
ent->isMarkedForRemoval = true;
EntitiesToBeRemoved.Push(ent->handle);
continue;
}
if (EntitiesToBeRemoved.Has(ent->parentHandle)) {
ent->isMarkedForRemoval = true;
EntitiesToBeRemoved.Push(ent->handle);
}
}
}
}
entitiesMarkedForRemoval.Resize(0);
}
CompGrBinds &ECS_CreateGrBinds(EntityHandle entHandle) {
Entity *ent = nullptr;
ECS_GetEntity_Inner(entHandle, ent);
GrBindsHandle_T newHandle{Buckets_NewHandle(maxBucketItemCount, Comp_GrBinds_BucketContainer)};
ent->grBindsHandle = GrBindsHandle{newHandle};
auto b = Buckets_GetBucketIndex(newHandle);
auto i = Buckets_GetItemIndex(newHandle);
auto &comp = Comp_GrBinds_BucketContainer.buckets[b].compGrBinds[i];
comp.grBindsHandle = ent->grBindsHandle;
return comp;
}
CompGrBinds *ECS_GetGrBinds(EntityHandle entHandle) {
Entity *ent = nullptr;
ECS_GetEntity_Inner(entHandle, ent);
GrBindsHandle_T grBindsHandle_t{static_cast<GrBindsHandle_T>(ent->grBindsHandle)};
if (grBindsHandle_t == ECS_UNSET_VAL) return nullptr;
auto b = Buckets_GetBucketIndex(grBindsHandle_t);
auto i = Buckets_GetItemIndex(grBindsHandle_t);
return &Comp_GrBinds_BucketContainer.buckets[b].compGrBinds[i];
}
uint64_t ECS_GetGrBinds_BucketCount() {
return Comp_GrBinds_BucketContainer.bucketCounter;
}
CompGrBinds *ECS_GetGrBinds(uint64_t bucketIndex, uint64_t &itemCount) {
if (bucketIndex == Comp_GrBinds_BucketContainer.bucketCounter) {
itemCount = Comp_GrBinds_BucketContainer.itemCounter;
} else {
itemCount = maxBucketItemCount;
}
return Comp_GrBinds_BucketContainer.buckets[bucketIndex].compGrBinds;
}
CompInstance &ECS_CreateInstance(EntityHandle entHandle) {
Entity *ent = nullptr;
ECS_GetEntity_Inner(entHandle, ent);
InstanceHandle_T newHandle{Buckets_NewHandle(maxBucketItemCount, Comp_Instance_BucketContainer)};
ent->instanceHandle = InstanceHandle{newHandle};
GrBindsHandle_T grBindsHandle_t{static_cast<GrBindsHandle_T>(ent->grBindsHandle)};
assert(grBindsHandle_t != ECS_UNSET_VAL);
auto b2 = Buckets_GetBucketIndex(grBindsHandle_t);
auto i2 = Buckets_GetItemIndex(grBindsHandle_t);
auto &grBinds = Comp_GrBinds_BucketContainer.buckets[b2].compGrBinds[i2];
auto b = Buckets_GetBucketIndex(newHandle);
auto i = Buckets_GetItemIndex(newHandle);
auto &comp = Comp_Instance_BucketContainer.buckets[b].instances[i];
comp.grBindsHandle = ent->grBindsHandle;
comp.instanceHandle = ent->instanceHandle;
comp.index = grBinds.instances.Count();
grBinds.instances.Push({});
comp.ptr = &grBinds.instances[comp.index];
return comp;
}
CompInstance *ECS_GetInstance(EntityHandle entHandle) {
Entity *ent = nullptr;
ECS_GetEntity_Inner(entHandle, ent);
GrBindsHandle_T grBindsHandle_t{static_cast<GrBindsHandle_T>(ent->grBindsHandle)};
if (grBindsHandle_t == ECS_UNSET_VAL) return nullptr;
InstanceHandle_T instanceHandle_t{static_cast<InstanceHandle_T>(ent->instanceHandle)};
if (instanceHandle_t == ECS_UNSET_VAL) return nullptr;
auto b2 = Buckets_GetBucketIndex(grBindsHandle_t);
auto i2 = Buckets_GetItemIndex(grBindsHandle_t);
auto &grBinds = Comp_GrBinds_BucketContainer.buckets[b2].compGrBinds[i2];
auto b = Buckets_GetBucketIndex(instanceHandle_t);
auto i = Buckets_GetItemIndex(instanceHandle_t);
auto &comp = Comp_Instance_BucketContainer.buckets[b].instances[i];
comp.ptr = &grBinds.instances[comp.index];
return ∁
}
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