/// <summary>
/// This is the component's Update loop, it takes care of placing and moving the camera each frame.
/// </summary>
/// <param name="gameTime">XNA's built-in timer, provides a snapshot of the game's time.</param>
public override void Update(GameTime gameTime)
{
// Check for any input this frame
ProcessInput();
// Keep camera's angles and zoom within range
ProcessAngleRestriction();
ProcessZoomRestriction();
// Start with an initial offset
Vector3 cameraPosition = new Vector3(0.0f, this.zoom, 0.0f);
// Rotate camera from its offset to its desired position
ProcessRotation(ref cameraPosition);
// Update camera's target's position
ProcessTargetUpdate();
// Move the camera to world coordinates, based on target
MsgSetPosition setPositionMsg = ObjectPool.Aquire <MsgSetPosition>();
setPositionMsg.Position = (cameraPosition + this.targetPosition);
setPositionMsg.UniqueTarget = this.parentEntity.UniqueID;
this.parentEntity.Game.SendMessage(setPositionMsg);
// Offset the view to look ahead and/or look up if needed
ProcessLookOffsets();
// Look at the updated target position
this.parentEntity.LookAt(this.targetPosition);
}
/// <summary>
/// Update the component
/// </summary>
/// <param name="gameTime">XNA Timing snapshot</param>
public override void Update(GameTime gameTime)
{
if (CameraEntityID != QSGame.UniqueIDEmpty)
{
MsgGetPosition msgGetPos = ObjectPool.Aquire <MsgGetPosition>();
msgGetPos.UniqueTarget = CameraEntityID;
this.parentEntity.Game.SendMessage(msgGetPos);
// @HACK : I'm using the skydome model file I found on Riemer Grootjans's site, because I'm too
// lazy to use 3DSMax to lower my skydome model, I'm lowering it myself. If you make your
// own custom skydome model, please remove these two lines. :) - N.Foster
Vector3 pos = msgGetPos.Position;
pos.Y -= 600f;
MsgSetPosition msgSetPos = ObjectPool.Aquire <MsgSetPosition>();
msgSetPos.Position = pos;
msgSetPos.Type = MessageType.SetPosition;
msgSetPos.UniqueTarget = this.parentEntity.UniqueID;
this.parentEntity.Game.SendMessage(msgSetPos);
}
}
/// <summary>
/// Send a message directly to an Entity through this method.
/// This function MUST be called only from QSGame, otherwise it will never mark the message properly for release
/// and it will leak memory.
/// </summary>
/// <param name="message">Message to send</param>
/// <returns>Returns true if message was handled</returns>
public virtual bool ExecuteMessage(IMessage message)
{
switch (message.Type)
{
case MessageType.GetName:
{
MsgGetName msgGetName = message as MsgGetName;
message.TypeCheck(msgGetName);
msgGetName.Name = this.name;
}
break;
case MessageType.GetParentID:
{
MsgGetParentID msgGetID = message as MsgGetParentID;
message.TypeCheck(msgGetID);
if (this.parentEntity != null)
{
msgGetID.ParentEntityID = this.parentEntity.UniqueID;
}
}
break;
case MessageType.SetPosition:
{
MsgSetPosition setPositionMsg = message as MsgSetPosition;
message.TypeCheck(setPositionMsg);
this.Position = setPositionMsg.Position;
}
break;
case MessageType.ModifyPosition:
{
MsgModifyPosition modPosMsg = message as MsgModifyPosition;
message.TypeCheck(modPosMsg);
this.Position += modPosMsg.Position;
}
break;
case MessageType.GetPosition:
{
MsgGetPosition getPosMsg = message as MsgGetPosition;
message.TypeCheck(getPosMsg);
getPosMsg.Position = this.position;
}
break;
case MessageType.SetRotation:
{
MsgSetRotation setRotMsg = message as MsgSetRotation;
message.TypeCheck(setRotMsg);
this.Rotation = setRotMsg.Rotation;
}
break;
case MessageType.ModifyRotation:
{
MsgModifyRotation modRotMsg = message as MsgModifyRotation;
message.TypeCheck(modRotMsg);
this.Rotation *= modRotMsg.Rotation;
}
break;
case MessageType.GetRotation:
{
MsgGetRotation getRotMsg = message as MsgGetRotation;
message.TypeCheck(getRotMsg);
getRotMsg.Rotation = this.rotation;
}
break;
case MessageType.GetVectorForward:
{
MsgGetVectorForward getVectorMsg = message as MsgGetVectorForward;
message.TypeCheck(getVectorMsg);
getVectorMsg.Forward = this.rotation.Forward;
}
break;
case MessageType.GetVectorUp:
{
MsgGetVectorUp getVectorMsg = message as MsgGetVectorUp;
message.TypeCheck(getVectorMsg);
getVectorMsg.Up = this.rotation.Up;
}
break;
case MessageType.GetVectorRight:
{
MsgGetVectorRight getVectorMsg = message as MsgGetVectorRight;
message.TypeCheck(getVectorMsg);
getVectorMsg.Right = this.rotation.Right;
}
break;
case MessageType.LookAtPosition:
{
MsgLookAtPosition setPositionMsg = message as MsgLookAtPosition;
message.TypeCheck(setPositionMsg);
this.LookAt(setPositionMsg.Position);
}
break;
case MessageType.Pitch:
{
MsgModifyPitch camPitchMsg = message as MsgModifyPitch;
message.TypeCheck(camPitchMsg);
Pitch(camPitchMsg.PitchAmount);
}
break;
case MessageType.Yaw:
{
MsgModifyYaw camYawMsg = message as MsgModifyYaw;
message.TypeCheck(camYawMsg);
Yaw(camYawMsg.YawAmount);
}
break;
case MessageType.YawWorldUp:
{
MsgModifyYawWorldUp camYawMsg = message as MsgModifyYawWorldUp;
message.TypeCheck(camYawMsg);
YawAroundWorldUp(camYawMsg.YawAmount);
}
break;
case MessageType.SetParent:
{
MsgSetParent msgSetParent = message as MsgSetParent;
message.TypeCheck(msgSetParent);
SetParent(msgSetParent.ParentEntity);
}
break;
case MessageType.RemoveChild:
{
MsgRemoveChild msgRemChild = message as MsgRemoveChild;
message.TypeCheck(msgRemChild);
RemoveChild(msgRemChild.Child);
}
break;
case MessageType.ParentRemoved:
{
MsgParentRemoved msgParentRem = message as MsgParentRemoved;
message.TypeCheck(msgParentRem);
if (parentEntity == msgParentRem.Parent)
{
SetParent(null);
}
}
break;
case MessageType.ParentAdded:
{
MsgParentAdded msgParentAdded = message as MsgParentAdded;
message.TypeCheck(msgParentAdded);
SetParent(msgParentAdded.Parent);
}
break;
case MessageType.ChildRemoved:
{
MsgChildRemoved msgChildRem = message as MsgChildRemoved;
message.TypeCheck(msgChildRem);
if (msgChildRem.Child != null)
{
this.children.Remove(msgChildRem.Data.UniqueID);
}
}
break;
case MessageType.ChildAdded:
{
MsgChildAdded msgChildAdd = message as MsgChildAdded;
message.TypeCheck(msgChildAdd);
if (msgChildAdd.Child != null && msgChildAdd.Child != this)
{
this.children.Add(msgChildAdd.Data.UniqueID, msgChildAdd.Child);
}
}
break;
default:
return(SendMessageThroughComponents(message));
}
// For messages handled directly by the Entity but aren't Request Protocol,
// we still pass them to the Entity's components in case those components care.
if (message.Protocol != MessageProtocol.Request)
{
return(SendMessageThroughComponents(message));
}
return(true);
}
