/// <summary>
/// Updates all moving entities in the game
/// </summary>
/// <param name="elapsedTime">
/// The time between this and the previous frame.
/// </param>
public void Update(float elapsedTime)
{
// Update all entities that have a movement component
foreach (Movement movement in game.MovementComponent.All)
{
// Update the entity's position in the world
Position position = game.PositionComponent[movement.EntityID];
position.Center += elapsedTime * movement.Speed * movement.Direction;
game.PositionComponent[movement.EntityID] = position;
// Update the entity's movement sprite
if (game.MovementSpriteComponent.Contains(movement.EntityID))
{
MovementSprite movementSprite = game.MovementSpriteComponent[movement.EntityID];
// Set the direction of movement
float angle = (float)Math.Atan2(movement.Direction.Y, movement.Direction.X);
if (angle > -MathHelper.PiOver4 && angle < MathHelper.PiOver4)
{
movementSprite.Facing = Facing.East;
}
else if (angle >= MathHelper.PiOver4 && angle <= 3f * MathHelper.PiOver4)
{
movementSprite.Facing = Facing.South;
}
else if (angle >= -3 * MathHelper.PiOver4 && angle <= -MathHelper.PiOver4)
{
movementSprite.Facing = Facing.North;
}
else
{
movementSprite.Facing = Facing.West;
}
// Update the timing
movementSprite.Timer += elapsedTime;
if (movementSprite.Timer > 0.1f)
{
movementSprite.Frame += 1;
if (movementSprite.Frame > 2)
{
movementSprite.Frame = 0;
}
movementSprite.Timer -= 0.1f;
}
// Update the sprite bounds
movementSprite.SpriteBounds.X = 64 * movementSprite.Frame;
movementSprite.SpriteBounds.Y = 64 * (int)movementSprite.Facing;
// Apply our updates
game.MovementSpriteComponent[movement.EntityID] = movementSprite;
}
}
}
/// <summary>
/// Handles a player joining the game. The new gamer should be sent
/// all the entity components it will need to synchonize with this
/// peer (i.e. all the components this peer has authority over)
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
void GamerJoinedEventHandler(object sender, GamerJoinedEventArgs e)
{
// We only need to update remote gamers - local ones will share
// our local game state
if (!e.Gamer.IsLocal)
{
// Send components for all entitys that we have authority over
// (i.e. those with a local component)
foreach (Local local in game.LocalComponent.All)
{
// Send position
if (game.PositionComponent.Contains(local.EntityID))
{
Position position = game.PositionComponent[local.EntityID];
packetWriter.Write(position.EntityID);
packetWriter.Write((short)PacketTypes.Position);
packetWriter.Write(position.Center);
packetWriter.Write(position.Radius);
}
// Send sprite
if (game.SpriteComponent.Contains(local.EntityID))
{
Sprite sprite = game.SpriteComponent[local.EntityID];
packetWriter.Write(sprite.EntityID);
packetWriter.Write((short)PacketTypes.Sprite);
packetWriter.Write(sprite.SpriteSheet.Name);
packetWriter.Write(sprite.SpriteBounds.X);
packetWriter.Write(sprite.SpriteBounds.Y);
packetWriter.Write(sprite.SpriteBounds.Width);
packetWriter.Write(sprite.SpriteBounds.Height);
}
// Send movement sprite
if (game.MovementSpriteComponent.Contains(local.EntityID))
{
MovementSprite sprite = game.MovementSpriteComponent[local.EntityID];
packetWriter.Write(sprite.EntityID);
packetWriter.Write((short)PacketTypes.MovementSprite);
packetWriter.Write(sprite.SpriteSheet.Name);
packetWriter.Write(sprite.SpriteBounds.X);
packetWriter.Write(sprite.SpriteBounds.Y);
packetWriter.Write(sprite.SpriteBounds.Width);
packetWriter.Write(sprite.SpriteBounds.Height);
}
// Send the data
session.LocalGamers[0].SendData(packetWriter, SendDataOptions.InOrder, e.Gamer);
}
}
}
/// <summary>
/// Sends updates on all entities under local authority
/// </summary>
void SendLocalEntityUpdates()
{
try //Catch all errors since one keeps happening randomly
{
foreach (Local local in game.LocalComponent.All)
{
// Send position
if (game.PositionComponent.Contains(local.EntityID))
{
Position position = game.PositionComponent[local.EntityID];
packetWriter.Write(position.EntityID);
packetWriter.Write((short)PacketTypes.Position);
packetWriter.Write(position.Center);
packetWriter.Write(position.Radius);
session.LocalGamers[0].SendData(packetWriter, SendDataOptions.InOrder);
}
// Send sprite
if (game.SpriteComponent.Contains(local.EntityID))
{
Sprite sprite = game.SpriteComponent[local.EntityID];
packetWriter.Write(sprite.EntityID);
packetWriter.Write((short)PacketTypes.Sprite);
packetWriter.Write(sprite.SpriteSheet.Name);
packetWriter.Write(sprite.SpriteBounds.X);
packetWriter.Write(sprite.SpriteBounds.Y);
packetWriter.Write(sprite.SpriteBounds.Width);
packetWriter.Write(sprite.SpriteBounds.Height);
session.LocalGamers[0].SendData(packetWriter, SendDataOptions.InOrder);
}
// Send movement sprite
if (game.MovementSpriteComponent.Contains(local.EntityID))
{
MovementSprite sprite = game.MovementSpriteComponent[local.EntityID];
packetWriter.Write(sprite.EntityID);
packetWriter.Write((short)PacketTypes.MovementSprite);
packetWriter.Write(sprite.SpriteSheet.Name);
packetWriter.Write(sprite.SpriteBounds.X);
packetWriter.Write(sprite.SpriteBounds.Y);
packetWriter.Write(sprite.SpriteBounds.Width);
packetWriter.Write(sprite.SpriteBounds.Height);
session.LocalGamers[0].SendData(packetWriter, SendDataOptions.InOrder);
}
}
}
catch (Exception e)
{
}
}
/// <summary>
/// Update remote entity components based on network input
/// TODO: Reloading the texture every frame may quickly
/// become cost-prohibitive we may need a better option
/// </summary>
void RecieveRemoteEntityUpdates()
{
// Each local gamer recieves network messages - so process them all
foreach(LocalNetworkGamer gamer in session.LocalGamers)
{
// Process all waiting packets
while (gamer.IsDataAvailable)
{
NetworkGamer sender;
// Read a single packet from the network
gamer.ReceiveData(packetReader, out sender);
// Discard local packets - we already know local state
if (sender.IsLocal) continue;
// Look up the entity associated with this network packet
uint entityID = game.RemoteComponent.FindRemoteEntity(sender.Id, packetReader.ReadUInt32());
string textureName;
// process the packet
PacketTypes packetType = (PacketTypes)packetReader.ReadInt16();
switch (packetType)
{
case PacketTypes.Position:
Position position = new Position()
{
EntityID = entityID,
Center = packetReader.ReadVector2(),
Radius = packetReader.ReadSingle(),
};
game.PositionComponent[entityID] = position;
break;
case PacketTypes.Sprite:
Sprite sprite = new Sprite();
textureName = packetReader.ReadString();
sprite.EntityID = entityID;
sprite.SpriteSheet = game.Content.Load<Texture2D>(textureName);
sprite.SpriteSheet.Name = textureName;
sprite.SpriteBounds.X = packetReader.ReadInt32();
sprite.SpriteBounds.Y = packetReader.ReadInt32();
sprite.SpriteBounds.Width = packetReader.ReadInt32();
sprite.SpriteBounds.Height = packetReader.ReadInt32();
game.SpriteComponent[entityID] = sprite;
break;
case PacketTypes.MovementSprite:
MovementSprite movementSprite = new MovementSprite();
textureName = packetReader.ReadString();
movementSprite.EntityID = entityID;
movementSprite.SpriteSheet = game.Content.Load<Texture2D>(textureName);
movementSprite.SpriteSheet.Name = textureName;
movementSprite.SpriteBounds.X = packetReader.ReadInt32();
movementSprite.SpriteBounds.Y = packetReader.ReadInt32();
movementSprite.SpriteBounds.Width = packetReader.ReadInt32();
movementSprite.SpriteBounds.Height = packetReader.ReadInt32();
game.MovementSpriteComponent[entityID] = movementSprite;
break;
}
}
}
}
/// <summary>
/// Creates Entities from aggregates (collections of components)
/// </summary>
/// <param name="aggregate">The specific aggreage to create</param>
public void CreateFromAggregate(Aggregate aggregate)
{
switch (aggregate)
{
case Aggregate.FairyPlayer:
uint entityID = Entity.NextEntity();
Texture2D spriteSheet = game.Content.Load<Texture2D>("Spritesheets/wind_fae");
spriteSheet.Name = "Spritesheets/wind_fae";
Position position = new Position()
{
EntityID = entityID,
Center = new Vector2(400, 50),
Radius = 32f,
};
game.PositionComponent[entityID] = position;
Movement movement = new Movement() {
EntityID = entityID,
Direction = new Vector2(0, 1),
Speed = 200f,
};
game.MovementComponent[entityID] = movement;
MovementSprite movementSprite = new MovementSprite() {
EntityID = entityID,
Facing = Facing.South,
SpriteSheet = spriteSheet,
SpriteBounds = new Rectangle(0, 0, 64, 64),
Timer = 0f,
};
game.MovementSpriteComponent[entityID] = movementSprite;
Local local = new Local(){
EntityID = entityID,
};
game.LocalComponent[entityID] = local;
Player player = new Player()
{
EntityID = entityID,
PlayerIndex = PlayerIndex.One,
};
game.PlayerComponent[entityID] = player;
break;
case Aggregate.CultistPlayer:
break;
case Aggregate.CyborgPlayer:
break;
case Aggregate.EarthianPlayer:
break;
case Aggregate.GargranianPlayer:
break;
case Aggregate.SpacePiratePlayer:
break;
case Aggregate.ZombiePlayer:
break;
}
}
/// <summary>
/// Update remote entity components based on network input
/// TODO: Reloading the texture every frame may quickly
/// become cost-prohibitive we may need a better option
/// </summary>
void RecieveRemoteEntityUpdates()
{
// Each local gamer recieves network messages - so process them all
foreach (LocalNetworkGamer gamer in session.LocalGamers)
{
// Process all waiting packets
while (gamer.IsDataAvailable)
{
NetworkGamer sender;
// Read a single packet from the network
gamer.ReceiveData(packetReader, out sender);
// Discard local packets - we already know local state
if (sender.IsLocal)
{
continue;
}
// Look up the entity associated with this network packet
uint entityID = game.RemoteComponent.FindRemoteEntity(sender.Id, packetReader.ReadUInt32());
string textureName;
// process the packet
PacketTypes packetType = (PacketTypes)packetReader.ReadInt16();
switch (packetType)
{
case PacketTypes.Position:
Position position = new Position()
{
EntityID = entityID,
Center = packetReader.ReadVector2(),
Radius = packetReader.ReadSingle(),
};
game.PositionComponent[entityID] = position;
break;
case PacketTypes.Sprite:
Sprite sprite = new Sprite();
textureName = packetReader.ReadString();
sprite.EntityID = entityID;
sprite.SpriteSheet = game.Content.Load <Texture2D>(textureName);
sprite.SpriteSheet.Name = textureName;
sprite.SpriteBounds.X = packetReader.ReadInt32();
sprite.SpriteBounds.Y = packetReader.ReadInt32();
sprite.SpriteBounds.Width = packetReader.ReadInt32();
sprite.SpriteBounds.Height = packetReader.ReadInt32();
game.SpriteComponent[entityID] = sprite;
break;
case PacketTypes.MovementSprite:
MovementSprite movementSprite = new MovementSprite();
textureName = packetReader.ReadString();
movementSprite.EntityID = entityID;
movementSprite.SpriteSheet = game.Content.Load <Texture2D>(textureName);
movementSprite.SpriteSheet.Name = textureName;
movementSprite.SpriteBounds.X = packetReader.ReadInt32();
movementSprite.SpriteBounds.Y = packetReader.ReadInt32();
movementSprite.SpriteBounds.Width = packetReader.ReadInt32();
movementSprite.SpriteBounds.Height = packetReader.ReadInt32();
game.MovementSpriteComponent[entityID] = movementSprite;
break;
}
}
}
}
/// <summary>
/// Creates Entities from aggregates (collections of components)
/// </summary>
/// <param name="aggregate">The specific aggreage to create</param>
public void CreateFromAggregate(Aggregate aggregate)
{
switch (aggregate)
{
case Aggregate.FairyPlayer:
uint entityID = Entity.NextEntity();
Texture2D spriteSheet = game.Content.Load <Texture2D>("Spritesheets/wind_fae");
spriteSheet.Name = "Spritesheets/wind_fae";
Position position = new Position()
{
EntityID = entityID,
Center = new Vector2(400, 50),
Radius = 32f,
};
game.PositionComponent[entityID] = position;
Movement movement = new Movement()
{
EntityID = entityID,
Direction = new Vector2(0, 1),
Speed = 200f,
};
game.MovementComponent[entityID] = movement;
MovementSprite movementSprite = new MovementSprite()
{
EntityID = entityID,
Facing = Facing.South,
SpriteSheet = spriteSheet,
SpriteBounds = new Rectangle(0, 0, 64, 64),
Timer = 0f,
};
game.MovementSpriteComponent[entityID] = movementSprite;
Local local = new Local()
{
EntityID = entityID,
};
game.LocalComponent[entityID] = local;
Player player = new Player()
{
EntityID = entityID,
PlayerIndex = PlayerIndex.One,
};
game.PlayerComponent[entityID] = player;
break;
case Aggregate.CultistPlayer:
break;
case Aggregate.CyborgPlayer:
break;
case Aggregate.EarthianPlayer:
break;
case Aggregate.GargranianPlayer:
break;
case Aggregate.SpacePiratePlayer:
break;
case Aggregate.ZombiePlayer:
break;
}
}
