public static void OnGlobalSpawnEvent(object senderEvent)
{
// Select a spawn group to spawn
MySpawnGroupDefinition spawnGroup = PickRandomSpawnGroup();
if (spawnGroup == null)
{
return;
}
spawnGroup.ReloadPrefabs();
ProfilerShort.Begin("Generate position and direction");
double spawnDistance = NEUTRAL_SHIP_SPAWN_DISTANCE;
Vector3D playerPosition = Vector3D.Zero;
bool isWorldLimited = MyEntities.IsWorldLimited();
int numPlayers = 0;
if (isWorldLimited)
{
spawnDistance = Math.Min(spawnDistance, MyEntities.WorldSafeHalfExtent() - spawnGroup.SpawnRadius);
}
else
{
// In infinite worlds players can be thousands of kilometers away, so spawn ship around random player
// so cargo ships will be spawned around every player at some time
var players = MySession.Static.Players.GetOnlinePlayers();
// In DS there can be no players connected
numPlayers = Math.Max(0, players.Count - 1);
int randomPlayerPosition = MyUtils.GetRandomInt(0, numPlayers);
int i = 0;
foreach (var player in players)
{
if (i == randomPlayerPosition)
{
if (player.Character != null)
{
playerPosition = player.GetPosition();
}
break;
}
i++;
}
}
if (spawnDistance < 0.0f)
{
MySandboxGame.Log.WriteLine("Not enough space in the world to spawn such a huge spawn group!");
return;
}
double forbiddenRadius = NEUTRAL_SHIP_FORBIDDEN_RADIUS;
BoundingBoxD spawnBox;
if (isWorldLimited)
{
spawnBox = new BoundingBoxD(new Vector3D(playerPosition - spawnDistance), new Vector3D(playerPosition + spawnDistance));
}
else
{
// We need to extend bouding box so cargo ships aren't spawned near other players
GetSafeBoundingBoxForPlayers(playerPosition, spawnDistance, out spawnBox);
// Forbidden radius is sphere around all players in box.
// Bounding box is generated from players positions so their distance to center shall be same for all players
forbiddenRadius += spawnBox.HalfExtents.Max() - NEUTRAL_SHIP_FORBIDDEN_RADIUS;
}
// Get the direction to the center and deviate it randomly
Vector3D? origin = MyUtils.GetRandomBorderPosition(ref spawnBox);
origin = MyEntities.FindFreePlace(origin.Value, spawnGroup.SpawnRadius);
if (!origin.HasValue)
{
MySandboxGame.Log.WriteLine("Could not spawn neutral ships - no free place found");
MyGlobalEvents.RescheduleEvent(senderEvent as MyGlobalEventBase, NEUTRAL_SHIP_RESCHEDULE_TIME);
ProfilerShort.End();
return;
}
// Radius in arc units of the forbidden sphere in the center, when viewed from origin
float centerArcRadius = (float)Math.Atan(forbiddenRadius / (origin.Value - spawnBox.Center).Length());
// Generate direction with elevation from centerArcRadius radians to (cAR + N_S_D_S) radians
Vector3D direction = -Vector3D.Normalize(origin.Value);
float theta = MyUtils.GetRandomFloat(centerArcRadius, centerArcRadius + NEUTRAL_SHIP_DIRECTION_SPREAD);
float phi = MyUtils.GetRandomRadian();
Vector3D cosVec = Vector3D.CalculatePerpendicularVector(direction);
Vector3D sinVec = Vector3D.Cross(direction, cosVec);
cosVec *= (Math.Sin(theta) * Math.Cos(phi));
sinVec *= (Math.Sin(theta) * Math.Sin(phi));
direction = direction * Math.Cos(theta) + cosVec + sinVec;
Vector3D destination = Vector3D.Zero;
RayD ray = new RayD(origin.Value, direction);
double? intersection = ray.Intersects(spawnBox);
Vector3D directionMult;
if (!intersection.HasValue || intersection.Value < NEUTRAL_SHIP_MINIMAL_ROUTE_LENGTH)
{
directionMult = direction * NEUTRAL_SHIP_MINIMAL_ROUTE_LENGTH;
}
else
{
directionMult = direction * intersection.Value;
}
destination = origin.Value + directionMult;
Vector3D upVector = Vector3D.CalculatePerpendicularVector(direction);
Vector3D rightVector = Vector3D.Cross(direction, upVector);
MatrixD originMatrix = MatrixD.CreateWorld(origin.Value, direction, upVector);
ProfilerShort.End();
ProfilerShort.Begin("Check free space");
// CH:TODO: Convex cast to detect collision
// Check ships' path to avoid possible collisions. (TODO: But only if it is said in the definitions)
m_raycastHits.Clear();
foreach (var shipPrefab in spawnGroup.Prefabs)
{
var prefabDef = MyDefinitionManager.Static.GetPrefabDefinition(shipPrefab.SubtypeId);
Debug.Assert(prefabDef != null);
Vector3D shipPosition = Vector3.Transform(shipPrefab.Position, originMatrix);
Vector3D shipDestination = shipPosition + directionMult;
float radius = prefabDef == null ? 10.0f : prefabDef.BoundingSphere.Radius;
MyPhysics.CastRay(shipPosition, shipDestination, m_raycastHits, MyPhysics.CollisionLayers.ObjectDetectionCollisionLayer);
if (m_raycastHits.Count > 0)
{
MySandboxGame.Log.WriteLine("Could not spawn neutral ships due to collision");
MyGlobalEvents.RescheduleEvent(senderEvent as MyGlobalEventBase, NEUTRAL_SHIP_RESCHEDULE_TIME);
ProfilerShort.End();
return;
}
for (int i = 0; i < 4; ++i)
{
Vector3D shiftVector = upVector * m_upVecMultipliers[i] * radius + rightVector * m_rightVecMultipliers[i] * radius;
MyPhysics.CastRay(shipPosition + shiftVector, shipDestination + shiftVector, m_raycastHits, MyPhysics.CollisionLayers.ObjectDetectionCollisionLayer);
if (m_raycastHits.Count > 0)
{
MySandboxGame.Log.WriteLine("Could not spawn neutral ships due to collision");
MyGlobalEvents.RescheduleEvent(senderEvent as MyGlobalEventBase, NEUTRAL_SHIP_RESCHEDULE_TIME);
ProfilerShort.End();
return;
}
}
}
ProfilerShort.End();
ProfilerShort.Begin("Spawn ships");
long spawnGroupId = MyPirateAntennas.GetPiratesId();
// The ships were collision-free. Now spawn them
foreach (var shipPrefab in spawnGroup.Prefabs)
{
ProfilerShort.Begin(shipPrefab.BeaconText);
// Yes, this could have been saved in the previous loop, but compared to (e.g.) raycasts, this does not take too much time to recalculate
Vector3D shipPosition = Vector3D.Transform((Vector3D)shipPrefab.Position, originMatrix);
Vector3D shipDestination = shipPosition + directionMult;
Vector3D up = Vector3D.CalculatePerpendicularVector(-direction);
m_tmpGridList.Clear();
// CH: We don't want a new identity for each ship anymore. We should handle that in a better way...
/*if (shipPrefab.ResetOwnership)
{
if (spawnGroupId == 0)
{
//This is not an NPC so that it doesn't show up in assign ownership drop down menu
MyIdentity spawnGroupIdentity = Sync.Players.CreateNewIdentity("Neutral NPC");
spawnGroupId = spawnGroupIdentity.IdentityId;
}
}*/
// Deploy ship
ProfilerShort.Begin("Spawn cargo ship");
MyPrefabManager.Static.SpawnPrefab(
resultList: m_tmpGridList,
prefabName: shipPrefab.SubtypeId,
position: shipPosition,
forward: direction,
up: up,
initialLinearVelocity: shipPrefab.Speed * direction,
beaconName: shipPrefab.BeaconText,
spawningOptions: Sandbox.ModAPI.SpawningOptions.RotateFirstCockpitTowardsDirection |
Sandbox.ModAPI.SpawningOptions.SpawnRandomCargo |
Sandbox.ModAPI.SpawningOptions.DisableDampeners,
ownerId: shipPrefab.ResetOwnership ? spawnGroupId : 0,
updateSync: true);
ProfilerShort.End();
foreach (var grid in m_tmpGridList)
{
var cockpit = grid.GetFirstBlockOfType<MyCockpit>();
if (cockpit != null)
{
MySimpleAutopilot ai = new MySimpleAutopilot(shipDestination, (Vector3)direction);
cockpit.AttachAutopilot(ai);
break;
}
}
m_tmpGridList.Clear();
ProfilerShort.End();
}
ProfilerShort.End();
}
private static void InitAutopilot(List<MyCubeGrid> tmpGridList, Vector3D shipDestination, Vector3D direction)
{
foreach (var grid in tmpGridList)
{
var cockpit = grid.GetFirstBlockOfType<MyCockpit>();
if (cockpit != null)
{
MySimpleAutopilot ai = new MySimpleAutopilot(shipDestination, (Vector3)direction);
cockpit.AttachAutopilot(ai);
break;
}
}
}
