/// <summary>
/// This quickly checks if a given position is in any natural gravity.
/// </summary>
/// <param name="position">Position to check</param>
/// <param name="sphereSize">Sphere size to test with.</param>
/// <returns>True if there is natural gravity at this position, false otherwise.</returns>
public static bool IsPositionInNaturalGravity(Vector3D position, double sphereSize = 0)
{
// Clamp sphere size to be at least 0.
sphereSize = MathHelper.Max(sphereSize, 0);
for (int i = 0; i < m_planetGenerators.Count; i++)
{
IMyGravityProvider provider = m_planetGenerators[i];
if (provider == null)
{
continue;
}
MyPlanet planet = provider as MyPlanet;
if (planet == null)
{
continue;
}
//we don't really care which planet's gravity we're in, so return as soon as we find one
if (planet.IsPositionInGravityWell(position))
{
return(true);
}
}
return(false);
}
public override void UpdateBeforeSimulation()
{
base.UpdateBeforeSimulation();
if (!MyFakes.ENABLE_PLANET_FIREFLIES)
{
return;
}
if (m_particleSpawnCounter-- > 0)
{
return;
}
m_particleSpawnCounter = 0;
var entity = MySession.Static.ControlledEntity as MyEntity;
if (entity == null)
{
return;
}
var controlledEntity = entity.GetTopMostParent();
if (controlledEntity == null)
{
return;
}
try
{
ProfilerShort.Begin("Fireflies.Spawn");
m_particleSpawnCounter = (int)Math.Round(m_particleSpawnCounter + m_particleSpawnCounter * m_particleSpawnIntervalRandomness * (MyRandom.Instance.NextFloat() * 2.0f - 1.0f));
float normalVar = (MyRandom.Instance.FloatNormal() + 3.0f) / 6.0f;
if (normalVar > m_particleDensity)
{
return;
}
var naturalGravity = MyGravityProviderSystem.CalculateNaturalGravityInPoint(MySector.MainCamera.Position);
if (naturalGravity.Dot(MySector.DirectionToSunNormalized) <= 0) // Only spawn at night and on planets
{
return;
}
var velocity = (MySession.Static.GetCameraControllerEnum() != MyCameraControllerEnum.Entity &&
MySession.Static.GetCameraControllerEnum() != MyCameraControllerEnum.ThirdPersonSpectator
? Vector3.Zero : controlledEntity.Physics.LinearVelocity);
var speed = velocity.Length();
var currentCharacter = controlledEntity as MyCharacter;
float characterFlyingMaxSpeed = MyGridPhysics.ShipMaxLinearVelocity();
if (currentCharacter != null && currentCharacter.Physics != null && currentCharacter.Physics.CharacterProxy != null)
{
characterFlyingMaxSpeed = currentCharacter.Physics.CharacterProxy.CharacterFlyingMaxLinearVelocity();
}
Vector3 halfExtents = Vector3.One * m_particleSpawnDistance;
if (speed / characterFlyingMaxSpeed > 1.0f)
{
halfExtents += 10.0f * velocity / characterFlyingMaxSpeed;
}
var entityTranslation = MySector.MainCamera.Position;
var searchPosition = entityTranslation + velocity;
MyPlanet planet = MyGravityProviderSystem.GetStrongestGravityWell(MySector.MainCamera.Position);
if (planet == null || !planet.IsPositionInGravityWell(MySector.MainCamera.Position))
{
return;
}
Vector3D cameraPosition = MySector.MainCamera.Position;
var foundEnvironmentItems = planet.GetEnvironmentItemsAtPosition(ref cameraPosition);
foreach (var environmentItems in foundEnvironmentItems)
{
environmentItems.GetAllItemsInRadius(searchPosition, m_particleSpawnDistance, m_tmpItemInfos);
}
var spawnPosition = default(Vector3D);
bool spawnPositionFound = m_tmpItemInfos.Count != 0;
if (spawnPositionFound)
{
int selectedTreeIndex = MyRandom.Instance.Next(0, m_tmpItemInfos.Count - 1);
spawnPosition = m_tmpItemInfos[selectedTreeIndex].Transform.Position;
spawnPositionFound = true;
}
else
{
return;
}
var spawnedParticle = Spawn(spawnPosition);
if (spawnedParticle == null)
{
return;
}
InitializePath(spawnedParticle);
}
finally
{
m_bodyCollisions.Clear();
m_tmpItemInfos.Clear();
ProfilerShort.End();
}
}
