public void OnDraw(Draw message)
{
if (!Enabled)
{
return;
}
var camera = (CameraSystem)Manager.GetSystem(CameraSystem.TypeId);
// Get camera transform.
var cameraTransform = camera.Transform;
var cameraTranslation = camera.Translation;
var interpolation = (InterpolationSystem)Manager.GetSystem(InterpolationSystem.TypeId);
// Iterate over all visible entities.
_spriteBatch.Begin(
SpriteSortMode.Deferred, BlendState.AlphaBlend, null, null, null, null, cameraTransform);
foreach (var entity in camera.VisibleEntities)
{
var transform = (ITransform)Manager.GetComponent(entity, TransformTypeId);
if (transform != null)
{
int x, y, subX, subY;
BitwiseMagic.Unpack(CellSystem.GetCellIdFromCoordinates(transform.Position), out x, out y);
BitwiseMagic.Unpack(CellSystem.GetSubCellIdFromCoordinates(transform.Position), out subX, out subY);
var text = string.Format(
"ID: {0} @ {1} / {2}\nCell: {3}:{4}, SubCell: {5}:{6}",
transform.Entity,
transform.Position,
transform.Angle,
x,
y,
subX,
subY);
FarPosition position;
float angle;
interpolation.GetInterpolatedTransform(transform.Entity, out position, out angle);
position = FarUnitConversion.ToScreenUnits(position + cameraTranslation);
_spriteBatch.DrawString(
_font,
text,
(Vector2)position,
Color.White,
0,
Vector2.Zero,
1f / camera.CameraZoom,
SpriteEffects.None,
1);
}
}
_spriteBatch.End();
}
public override void OnUpdate(Update message)
{
// See if we have some pending spawns.
if (_cellSpawns.Count > 0)
{
// Prefer cells with players in them.
var avatars = (AvatarSystem)Manager.GetSystem(AvatarSystem.TypeId);
var index = -1;
foreach (var avatar in avatars.Avatars)
{
var avatarPosition = ((ITransform)Manager.GetComponent(avatar, TransformTypeId)).Position;
var avatarCell = CellSystem.GetCellIdFromCoordinates(avatarPosition);
index = _cellSpawns.FindIndex(x => x.Item1 == avatarCell);
if (index >= 0)
{
break;
}
}
// Fall back to using the first cell, if there's no player in any.
if (index < 0)
{
index = _cellSpawns.Count - 1;
}
// Pop the entry (tuples are immutable).
var spawn = _cellSpawns[index];
_cellSpawns.RemoveAt(index);
// Should be removed in message handling if cell dies.
System.Diagnostics.Debug.Assert(
((CellSystem)Manager.GetSystem(CellSystem.TypeId)).IsSubCellActive(spawn.Item1));
// Spawn some ships.
ProcessSpawn(spawn.Item1);
// If there's stuff left to do push it back again.
if (spawn.Item2 > 1)
{
_cellSpawns.Add(Tuple.Create(spawn.Item1, spawn.Item2 - 1));
}
}
base.OnUpdate(message);
}
/// <summary>Processes a single spawn from the top of the spawn queue.</summary>
private void ProcessSpawn(ulong id)
{
// Get the cell position.
var position = CellSystem.GetSubCellCoordinatesFromId(id);
// Get the cell info to know what faction we're spawning for. Use the large cell id for that,
// because we only store info for that.
var cellInfo = ((UniverseSystem)Manager.GetSystem(UniverseSystem.TypeId))
.GetCellInfo(CellSystem.GetCellIdFromCoordinates(position));
// The area covered by the cell.
FarRectangle cellArea;
cellArea.X = position.X;
cellArea.Y = position.Y;
cellArea.Width = CellSystem.SubCellSize;
cellArea.Height = CellSystem.SubCellSize;
// Get center point for spawn group.
FarPosition spawnPoint;
spawnPoint.X = _random.NextInt32((int)cellArea.Left, (int)cellArea.Right);
spawnPoint.Y = _random.NextInt32((int)cellArea.Top, (int)cellArea.Bottom);
// Configuration for spawned ships.
string[] ships;
ArtificialIntelligence.AIConfiguration[] configurations = null;
var formation = SquadSystem.Formations.None;
// TODO different groups, based on cell info? definable via editor maybe?
if (_random.NextDouble() < 0.5f)
{
ships = new[]
{
"L1_AI_Ship",
"L1_AI_Ship",
"L1_AI_Ship",
"L1_AI_Ship",
"L1_AI_Ship",
"L1_AI_Ship"
};
configurations = new[]
{
new ArtificialIntelligence.AIConfiguration
{
AggroRange = UnitConversion.ToSimulationUnits(600)
}
};
formation = SquadSystem.Formations.Block;
}
else
{
ships = new[]
{
"L1_AI_Ship",
"L1_AI_Ship",
"L1_AI_Ship",
"L1_AI_Ship",
"L1_AI_Ship"
};
configurations = new[]
{
new ArtificialIntelligence.AIConfiguration
{
AggroRange = UnitConversion.ToSimulationUnits(800)
}
};
formation = SquadSystem.Formations.Vee;
}
// Spawn all ships.
Squad leaderSquad = null;
for (var i = 0; i < ships.Length; i++)
{
// Get the configuration for this particular ship. If we don't have enough configurations
// we just re-use the last existing one.
var configuration = configurations != null && configurations.Length > 0
? configurations[Math.Min(i, configurations.Length - 1)]
: null;
// Get a position nearby the spawn (avoids spawning all ships in one point).
var spawnPosition = spawnPoint;
spawnPosition.X += UnitConversion.ToSimulationUnits(_random.NextInt32(-100, 100));
spawnPosition.Y += UnitConversion.ToSimulationUnits(_random.NextInt32(-100, 100));
// Create the ship and get the AI component.
var ship = EntityFactory.CreateAIShip(
Manager, ships[i], cellInfo.Faction, spawnPosition, _random, configuration);
var ai = (ArtificialIntelligence)Manager.GetComponent(ship, ArtificialIntelligence.TypeId);
// Push fallback roam behavior, if an area has been specified.
ai.Roam(ref cellArea);
// If we have a squad push the squad component.
if (ships.Length <= 1)
{
// No squad, skip squad component.
continue;
}
var squad = Manager.AddComponent <Squad>(ship);
// If we're not the leader we guard him, otherwise mark us as
// the squad leader (ergo: first loop iteration).
if (leaderSquad != null)
{
leaderSquad.AddMember(ship);
ai.Guard(leaderSquad.Entity);
}
else
{
leaderSquad = squad;
squad.Formation = formation;
}
}
}