/*!
* Events are moved from the Vixen SharedWorld to the C#
* application through a shared event queue. Events
* observed and handled by the Vixen SharedWorld object
* are put into a queue. The Canvas3D class maintains a separate
* thread which waits on this queue and converts any Vixen Events
* it finds into C# Vixen.EventArgs and raises a .NET event
* which can be handled in the C# application.
*/
protected void EventLoop()
{
SharedWorld world = SharedWorld.Get();
StopEvents = false;
if (world.FileName != null)
{
world.LoadAsync(world.FileName, world.GetScene());
}
while (!StopEvents && (SharedWorld.Get() != null))
{
try
{
Event ev = SharedWorld.Get().NextEvent();
if (ev == null)
{
break;
}
if (ev.GetType() == typeof(TrackEvent))
{
if (ev.Code != Event.TRACK)
{
Console.Write("ERROR: TrackEvent has bad opcode");
}
}
string name = ev.GetName();
EventArgs args = new VixenEventArgs(ev);
object[] list = { this, args };
VixenEventHandler handler = new VixenEventHandler(PostVixenEvent);
Trace("Canvas3D:Event " + name + "\n");
Invoke(handler, list);
}
catch (Exception ex)
{
LogError("exception in event loop " + ex.Message);
}
}
if (SharedWorld.Get() != null)
{
SharedWorld.Get().Stop();
}
}
/*!
* Shuts down 3D processing and releases all 3D resources.
* This routine is called automatically when the window closes.
*/
public virtual void StopVixen()
{
SharedWorld world = SharedWorld.Get();
if (world != null)
{
Scene scene = world.GetScene();
if (scene != null)
{
scene.Window = 0;
}
world.StopEvents();
if (UsePhysics)
{
Physics.Shutdown();
}
}
}
/*!
* Routes a mouse event from this window to Vixen.
* Any Vixen objects which observe Event.MOUSE will get these events.
* If DispatchMouseEvents is false, this functionality is disabled.
* @see DispatchMouseEvents
*/
private void DispatchMouse(MouseEventArgs e)
{
int buttons = 0;
Keys modifiers = Control.ModifierKeys;
SharedWorld world = SharedWorld.Get();
Scene scene = SharedWorld.MainScene;
if ((scene == null) || (world == null) || !world.IsRunning())
{
return;
}
if (!DispatchMouseEvents)
{
return;
}
if ((e.Button & MouseButtons.Left) != 0)
{
buttons |= MouseEvent.LEFT;
}
if ((e.Button & MouseButtons.Right) != 0)
{
buttons |= MouseEvent.RIGHT;
}
if ((e.Button & MouseButtons.Middle) != 0)
{
buttons |= MouseEvent.MIDDLE;
}
if ((modifiers & Keys.Control) != 0)
{
buttons |= MouseEvent.CONTROL;
}
if ((modifiers & Keys.Shift) != 0)
{
buttons |= MouseEvent.SHIFT;
}
world.OnMouse(e.X, e.Y, buttons, 0);
OnMouse((float)e.X, (float)e.Y, buttons, 0);
}
/*!
* Start up Vixen 3D display and event processing.
* This function should not be called until the
* underlying Window has been created and the
* OS window handle is available. Vixen will display
* the 3D content in this window.
*/
public virtual bool RunVixen()
{
SharedWorld world = SharedWorld.Get();
IntPtr windowHandle = Handle;
Scene scene = null;
try
{
if (windowHandle == null)
{
LogError("Cannot get window handle for parent window");
return(false);
}
if ((world != null) && world.IsRunning())
{
return(false);
}
//world.SetDebugLevel(1);
world.Run((uint)windowHandle);
}
catch (Exception ex)
{
LogError("exception starting 3D " + ex.Message);
}
if (world.IsRunning())
{
ThreadStart eventloop = new ThreadStart(EventLoop);
Thread thread = new Thread(eventloop);
bool loadasync = World.DoAsyncLoad;
if (MediaDir != null)
{
world.SetMediaDir(MediaDir);
}
if (ContentFile != null)
{
world.FileName = GetMediaPath(ContentFile);
}
else
{
loadasync = false;
}
thread.Start();
if (!loadasync)
{
try
{
scene = MakeScene();
if (scene != null)
{
world.SetScene(scene);
}
}
catch (Exception ex)
{
SharedWorld.LogError("exception making initial scene " + ex.Message);
}
}
scene = world.GetScene();
if (scene != null)
{
scene.OnResize();
}
return(true);
}
return(false);
}
