/// <summary>
/// Handles mouse scroll wheel. This camera zooms based on mouse scrolling
/// </summary>
/// <param name="distance">Amount mouse scroll wheel has moved</param>
private void HandleMouseScroll(int distance)
{
if (distance > 0)
{
MsgCameraZoomIn camZoomMsg = ObjectPool.Aquire <MsgCameraZoomIn>();
camZoomMsg.UniqueTarget = this.parentEntity.UniqueID;
this.parentEntity.Game.SendMessage(camZoomMsg);
}
else
{
MsgCameraZoomOut camZoomMsg = ObjectPool.Aquire <MsgCameraZoomOut>();
camZoomMsg.UniqueTarget = this.parentEntity.UniqueID;
this.parentEntity.Game.SendMessage(camZoomMsg);
}
}
/// <summary>
/// Handles a message sent to this component.
/// </summary>
/// <param name="message">Message to be handled</param>
/// <returns>True, if handled, otherwise false</returns>
/// <exception cref="ArgumentException">Thrown if a <see cref="MessageType"/> is not handled properly."/></exception>
public override bool ExecuteMessage(IMessage message)
{
switch (message.Type)
{
case MessageType.CameraZoomIn:
{
MsgCameraZoomIn zoomMsg = message as MsgCameraZoomIn;
message.TypeCheck(zoomMsg);
ZoomPerspectiveIn();
}
return(true);
case MessageType.CameraZoomOut:
{
MsgCameraZoomOut zoomMsg = message as MsgCameraZoomOut;
message.TypeCheck(zoomMsg);
ZoomPerspectiveOut();
}
return(true);
case MessageType.GetCameraValues:
{
MsgCameraGetValues msgCamValues = message as MsgCameraGetValues;
message.TypeCheck(msgCamValues);
msgCamValues.AspectRatio = this.aspectRatio;
msgCamValues.FOV = this.fov;
msgCamValues.NearPlane = this.nearPlane;
msgCamValues.FarPlane = this.farPlane;
msgCamValues.ViewMatrix = this.viewMatrix;
}
return(true);
case MessageType.CameraGetViewMatrix:
{
MsgGetViewMatrix getViewMsg = message as MsgGetViewMatrix;
message.TypeCheck(getViewMsg);
getViewMsg.ViewMatrix = this.viewMatrix;
}
return(true);
case MessageType.CameraGetProjectionMatrix:
{
MsgGetProjectionMatrix getProjMsg = message as MsgGetProjectionMatrix;
message.TypeCheck(getProjMsg);
getProjMsg.ProjectionMatrix = this.projectionMatrix;
}
return(true);
case MessageType.GraphicsSettingsChanged:
{
if (this.lockAspectRatioToViewport)
{
this.aspectRatio = this.parentEntity.Game.GraphicsDevice.Viewport.AspectRatio;
if (this.aspectRatio < float.Epsilon)
{
throw new ArgumentOutOfRangeException("aspectRatio cannot be zero or a negative value");
}
this.UpdateProjectionMatrix();
}
}
return(true);
default:
return(false);
}
}
