protected override void OnCreateManager( )
{
base.OnCreateManager( );
// Test octrees
// Many octrees, to ray pair
// Where each octree has one ray entity target.
// Results return number of colliding instance
// index to list of the colliding instances IDs,
// and distance to the nearest instance.
// Toggle manually only one example systems at the time
if (!(ExampleSelector.selector == Selector.GetCollidingRayInstancesSystem_Octrees2Ray))
{
return; // Early exit
}
Debug.Log("Start Test Get Colliding Ray Instances System");
// Create new octree
// See arguments details (names) of _CreateNewOctree and coresponding octree readme file.
EntityCommandBuffer ecb = barrier.CreateCommandBuffer();
// Many octrees, to single, or many rays
// Where each octree has one ray entity target.
// ***** Example Ray Components For Collision Checks ***** //
// Test ray entity
// for each octree
Entity rayEntity = EntityManager.CreateEntity();
EntityManager.AddComponentData(rayEntity, new IsActiveTag());
EntityManager.AddComponentData(rayEntity, new RayData());
EntityManager.AddComponentData(rayEntity, new RayMaxDistanceData()
{
f = 1000f
});
// ***** Initialize Octree ***** //
int i_octreesCount = 1; // Example of x octrees.
// int i_octreesCount = 100 ; // Example of x octrees.
NativeArray <Entity> a_entities = new NativeArray <Entity> (i_octreesCount, Allocator.Temp);
for (int i_octreeEntityIndex = 0; i_octreeEntityIndex < i_octreesCount; i_octreeEntityIndex++)
{
ecb = barrier.CreateCommandBuffer();
Entity newOctreeEntity = EntityManager.CreateEntity( );
AddNewOctreeSystem._CreateNewOctree(ecb, newOctreeEntity, 8, float3.zero, 1, 1, 1);
EntityManager.AddComponent(newOctreeEntity, typeof(GetCollidingRayInstancesTag));
EntityManager.AddComponentData(newOctreeEntity, new IsCollidingData()); // Check bounds collision with octree and return colliding instances.
EntityManager.AddBuffer <CollisionInstancesBufferElement> (newOctreeEntity);
// Assign target ray entity, to octree entity
Entity octreeEntity = newOctreeEntity;
// Check bounds collision with octree and return colliding instances.
EntityManager.AddComponentData(octreeEntity, new RayEntityPair4CollisionData()
{
ray2CheckEntity = rayEntity
});
// ***** Example Components To Add / Remove Instance ***** //
// Example of adding and removing some instanceses, hence entity blocks.
// Add
int i_instances2AddCount = ExampleSelector.i_generateInstanceInOctreeCount; // Example of x octrees instances. // 10000
NativeArray <Entity> a_instanceEntities = Common._CreateInstencesArray(EntityManager, i_instances2AddCount);
// Request to add n instances.
// User is responsible to ensure, that instances IDs are unique in the octrtree.
EntityManager.AddBuffer <AddInstanceBufferElement> (octreeEntity); // Once system executed and instances were added, buffer will be deleted.
BufferFromEntity <AddInstanceBufferElement> addInstanceBufferElement = GetBufferFromEntity <AddInstanceBufferElement> ();
Common._RequesAddInstances(ecb, octreeEntity, addInstanceBufferElement, ref a_instanceEntities, i_instances2AddCount);
// Remove
EntityManager.AddBuffer <RemoveInstanceBufferElement> (octreeEntity); // Once system executed and instances were removed, component will be deleted.
BufferFromEntity <RemoveInstanceBufferElement> removeInstanceBufferElement = GetBufferFromEntity <RemoveInstanceBufferElement> ();
// Request to remove some instances
// Se inside method, for details
int i_instances2RemoveCount = ExampleSelector.i_deleteInstanceInOctreeCount = 53; // Example of x octrees instances / entities to delete. // 53
Common._RequestRemoveInstances(ecb, octreeEntity, removeInstanceBufferElement, ref a_instanceEntities, i_instances2RemoveCount);
// Ensure example array is disposed.
a_instanceEntities.Dispose();
} // for
}
