private static void CreateAndSpawnEntities(EntityManager entityManager, int count, MeshInstanceRenderer look, float3 startPos, float3 floatDirection)
{
// if you spawn more entities, it's more performant to do it with NativeArray
// if you want to spawn just one entity, do:
// var entity = em.CreateEntity(EntityArchetype);
var entities = new NativeArray <Entity>(count, Allocator.Temp);
// Spawns entities and attaches all components from the floatyCubes archetype
entityManager.CreateEntity(floatyCubeArchetype, entities);
// Setting up start values for the components
for (int i = 0; i < count; i++)
{
var floaterComponent = new FloaterComponent();
floaterComponent.floatSpeed = UnityEngine.Random.Range(1.0f, 5.0f);
floaterComponent.floatDirection = new float3(
floatDirection.x == 0 ? UnityEngine.Random.Range(-1.0f, 1.0f) : floatDirection.x,
floatDirection.y == 0 ? UnityEngine.Random.Range(-1.0f, 1.0f) : floatDirection.y,
floatDirection.z == 0 ? UnityEngine.Random.Range(-1.0f, 1.0f) : floatDirection.z
);
var rotatorComponent = new RotatorComponent();
rotatorComponent.rotationSpeed = floaterComponent.floatSpeed;
rotatorComponent.direction = new float3(UnityEngine.Random.Range(-1.0f, 1.0f), UnityEngine.Random.Range(-1.0f, 1.0f), UnityEngine.Random.Range(-1.0f, 1.0f));
entityManager.SetComponentData(entities[i], new Position()
{
Value = startPos
});
entityManager.SetComponentData(entities[i], new Rotation()
{
Value = quaternion.identity
});
entityManager.SetComponentData(entities[i], new Scale()
{
Value = new float3(1f, 1f, 1f)
});
entityManager.SetComponentData(entities[i], rotatorComponent);
entityManager.SetComponentData(entities[i], floaterComponent);
// This shared component decides the rendered look of the entity
entityManager.AddSharedComponentData(entities[i], look);
}
// All NativeArray's need to be disposed of manually. This will not destroy any entities, just state that we will not be using the array anymore.
entities.Dispose();
}
protected override void OnStartRunning()
{
// For now we only support one emitter for the sake of simplicity
var emitter = BootstrapperParticles.particleEmitterTemplate;
randomEmissionDirections = new NativeArray <float3>(emitter.maxParticles, Allocator.Persistent);
randomRotatorComponents = new NativeArray <RotatorComponent>(emitter.maxParticles, Allocator.Persistent);
for (int i = 0; i < emitter.maxParticles; i++)
{
randomEmissionDirections[i] = new float3
(
UnityEngine.Random.Range(-emitter.rangeX, emitter.rangeX),
UnityEngine.Random.Range(-emitter.rangeY, emitter.rangeY),
UnityEngine.Random.Range(-emitter.rangeZ, emitter.rangeZ)
);
var rotator = new RotatorComponent();
rotator.rotationSpeed = UnityEngine.Random.Range(1.0f, 5.0f);
rotator.direction = new float3(UnityEngine.Random.Range(-1.0f, 1.0f), UnityEngine.Random.Range(-1.0f, 1.0f), UnityEngine.Random.Range(-1.0f, 1.0f));
randomRotatorComponents[i] = rotator;
}
}
