protected override void OnUpdate()
{
Entities.ForEach((Entity e, SpawnRandomInSphere spawner, ref LocalToWorld localToWorld) =>
{
int toSpawnCount = spawner.Count;
var spawnPositions = new NativeArray <float3>(toSpawnCount, Allocator.TempJob);
GeneratePoints.RandomPointsInUnitSphere(spawnPositions);
// Calling Instantiate once per spawned Entity is rather slow, and not recommended
// This code is placeholder until we add the ability to bulk-instantiate many entities from an ECB
var entities = new NativeArray <Entity>(toSpawnCount, Allocator.Temp);
for (int i = 0; i < toSpawnCount; ++i)
{
entities[i] = PostUpdateCommands.Instantiate(spawner.Prefab);
}
for (int i = 0; i < toSpawnCount; i++)
{
PostUpdateCommands.SetComponent(entities[i], new LocalToWorld
{
Value = float4x4.TRS(
localToWorld.Position + (spawnPositions[i] * spawner.Radius),
quaternion.LookRotationSafe(spawnPositions[i], math.up()),
new float3(1.0f, 1.0f, 1.0f))
});
}
PostUpdateCommands.RemoveComponent <SpawnRandomInSphere>(e);
spawnPositions.Dispose();
entities.Dispose();
});
}
protected override void OnUpdate()
{
Entities.ForEach((Entity e, SpawnRandomInSphere spawner, ref LocalToWorld localToWorld) =>
{
int toSpawnCount = spawner.Count;
// Using a .TempJob instead of a .Temp for `spawnPositions`, because the method
// `RandomPointsInUnitSphere` passes this NativeArray into a Job
var spawnPositions = new NativeArray <float3>(toSpawnCount, Allocator.TempJob);
GeneratePoints.RandomPointsInUnitSphere(spawnPositions);
// Calling Instantiate once per spawned Entity is rather slow, and not recommended
// This code is placeholder until we add the ability to bulk-instantiate many entities from an ECB
var entities = new NativeArray <Entity>(toSpawnCount, Allocator.Temp);
for (int i = 0; i < toSpawnCount; ++i)
{
entities[i] = PostUpdateCommands.Instantiate(spawner.Prefab);
}
for (int i = 0; i < toSpawnCount; i++)
{
PostUpdateCommands.SetComponent(entities[i], new LocalToWorld
{
Value = float4x4.TRS(
localToWorld.Position + (spawnPositions[i] * spawner.Radius),
quaternion.LookRotationSafe(spawnPositions[i], math.up()),
new float3(1.0f, 1.0f, 1.0f))
});
}
// Using 'RemoveComponent' instead of 'DestroyEntity' as a safety.
// Removing the SpawnRandomInSphere component is sufficient to prevent the spawner
// from executing its spawn logic more than once. The spawner may have other components
// that are relevant to ongoing processing; this system doesn't know about them & shouldn't
// assume the entity is safe to delete.
PostUpdateCommands.RemoveComponent <SpawnRandomInSphere>(e);
spawnPositions.Dispose();
entities.Dispose();
});
}
protected override void OnUpdate()
{
var uniqueTypes = new List <SpawnRandomInSphere>(10);
EntityManager.GetAllUniqueSharedComponentData(uniqueTypes);
int spawnInstanceCount = 0;
for (int sharedIndex = 0; sharedIndex != uniqueTypes.Count; sharedIndex++)
{
var spawner = uniqueTypes[sharedIndex];
m_MainGroup.SetFilter(spawner);
var entityCount = m_MainGroup.CalculateLength();
spawnInstanceCount += entityCount;
}
if (spawnInstanceCount == 0)
{
return;
}
var spawnInstances = new NativeArray <SpawnRandomInSphereInstance>(spawnInstanceCount, Allocator.Temp);
{
int spawnIndex = 0;
for (int sharedIndex = 0; sharedIndex != uniqueTypes.Count; sharedIndex++)
{
var spawner = uniqueTypes[sharedIndex];
m_MainGroup.SetFilter(spawner);
if (m_MainGroup.CalculateLength() == 0)
{
continue;
}
var entities = m_MainGroup.ToEntityArray(Allocator.TempJob);
var localToWorld = m_MainGroup.ToComponentDataArray <LocalToWorld>(Allocator.TempJob);
for (int entityIndex = 0; entityIndex < entities.Length; entityIndex++)
{
var spawnInstance = new SpawnRandomInSphereInstance();
spawnInstance.sourceEntity = entities[entityIndex];
spawnInstance.spawnerIndex = sharedIndex;
spawnInstance.position = localToWorld[entityIndex].Position;
spawnInstances[spawnIndex] = spawnInstance;
spawnIndex++;
}
entities.Dispose();
localToWorld.Dispose();
}
}
for (int spawnIndex = 0; spawnIndex < spawnInstances.Length; spawnIndex++)
{
int spawnerIndex = spawnInstances[spawnIndex].spawnerIndex;
var spawner = uniqueTypes[spawnerIndex];
int count = spawner.count;
var entities = new NativeArray <Entity>(count, Allocator.Temp);
var prefab = spawner.prefab;
float radius = spawner.radius;
var spawnPositions = new NativeArray <float3>(count, Allocator.TempJob);
float3 center = spawnInstances[spawnIndex].position;
var sourceEntity = spawnInstances[spawnIndex].sourceEntity;
GeneratePoints.RandomPointsInUnitSphere(spawnPositions);
EntityManager.Instantiate(prefab, entities);
for (int i = 0; i < count; i++)
{
EntityManager.SetComponentData(entities[i], new LocalToWorld
{
Value = float4x4.TRS(
center + (spawnPositions[i] * radius),
quaternion.LookRotationSafe(spawnPositions[i], math.up()),
new float3(1.0f, 1.0f, 1.0f))
});
}
EntityManager.RemoveComponent <SpawnRandomInSphere>(sourceEntity);
spawnPositions.Dispose();
entities.Dispose();
}
spawnInstances.Dispose();
}
// This is (most times) a trigger: see https://forum.unity.com/threads/onupdate-method-in-componentsystems.541647/ for when it's called
protected override void OnUpdate()
{
var uniqueTypes = new List <SpawnRandomInSphere>(10);
// We have (by default) 2 BoidFishSpawners in the scene (if not modified). These have 3 attributes. If both spawners have EXACTLY the same values (whether its reference or value type)
// they will be "fused" in uniqueTypes.Count, so uniqueTypes.Count will be 2, otherwise it'll be 3. The reason is that the first seems to be a default one (see link below)
EntityManager.GetAllUniqueSharedComponentData(uniqueTypes);
int spawnInstanceCount = 0;
// https://forum.unity.com/threads/question-about-getalluniquesharedcomponentdata.545945/
// Since the 0 is the default, why not start at 1, does not make any difference since when filtering by the 0 uniqueType, it's being ignored
for (int sharedIndex = 0 /* 1 */; sharedIndex != uniqueTypes.Count; sharedIndex++)
{
var spawner = uniqueTypes[sharedIndex];
// this is filtering the "groups of instances" that have the same values
m_MainGroup.SetFilter(spawner);
// we're counting them
var entityCount = m_MainGroup.CalculateLength();
// so this is the overall number of instances wether or not they have the same values
spawnInstanceCount += entityCount;
}
if (spawnInstanceCount == 0)
{
return;
}
var spawnInstances = new NativeArray <SpawnRandomInSphereInstance>(spawnInstanceCount, Allocator.Temp);
{
int spawnIndex = 0;
for (int sharedIndex = 0; sharedIndex != uniqueTypes.Count; sharedIndex++)
{
var spawner = uniqueTypes[sharedIndex];
m_MainGroup.SetFilter(spawner);
// this would never be 0 if the previous loop started at 1 I guess
if (m_MainGroup.CalculateLength() == 0)
{
continue;
}
// 1+1 entities (if any value differs, and it is the default scene, 2 spawners overall)
var entities = m_MainGroup.ToEntityArray(Allocator.TempJob);
var localToWorld = m_MainGroup.ToComponentDataArray <LocalToWorld>(Allocator.TempJob);
// convenient way of storing the 2 (if default) spawners info
for (int entityIndex = 0; entityIndex < entities.Length; entityIndex++)
{
var spawnInstance = new SpawnRandomInSphereInstance();
spawnInstance.sourceEntity = entities[entityIndex];
spawnInstance.spawnerIndex = sharedIndex;
spawnInstance.position = localToWorld[entityIndex].Position;
spawnInstances[spawnIndex] = spawnInstance;
spawnIndex++;
}
entities.Dispose();
localToWorld.Dispose();
}
// for more info about ISharedComponentData see: https://docs.unity3d.com/Packages/[email protected]/manual/shared_component_data.html
}
// now for every spawner
for (int spawnIndex = 0; spawnIndex < spawnInstances.Length; spawnIndex++)
{
int spawnerIndex = spawnInstances[spawnIndex].spawnerIndex;
var spawner = uniqueTypes[spawnerIndex];
int count = spawner.count;
var prefab = spawner.prefab;
float radius = spawner.radius;
float3 center = spawnInstances[spawnIndex].position;
var sourceEntity = spawnInstances[spawnIndex].sourceEntity;
var spawnPositions = new NativeArray <float3>(count, Allocator.TempJob);
var entities = new NativeArray <Entity>(count, Allocator.Temp);
// prepare the positions to spawn the fishes and instantiate them
GeneratePoints.RandomPointsInUnitSphere(spawnPositions);
EntityManager.Instantiate(prefab, entities);
for (int i = 0; i < count; i++)
{
// set the fishes entities data
EntityManager.SetComponentData(entities[i], new LocalToWorld
{
// the center is the spawner GameObject center
// radius is the sphere radius
Value = float4x4.TRS(
center + (spawnPositions[i] * radius),
quaternion.LookRotationSafe(spawnPositions[i], math.up()),
new float3(1.0f, 1.0f, 1.0f))
});
}
// the system does not need it anymore, get rid of it
EntityManager.RemoveComponent <SpawnRandomInSphere>(sourceEntity);
spawnPositions.Dispose();
entities.Dispose();
}
spawnInstances.Dispose();
}