private void FramerateIndependantLoop()
{
// update timer
_time = _gameTime = FP.GetTimer();
FP._platformTime = (uint)_time - _platformTime;
_updateTime = _time;
FP.Elapsed = (_time - _last) / 1000.0f;
if (FP.Elapsed > MaxElapsed)
{
FP.Elapsed = MaxElapsed;
}
FP.Elapsed *= FP.Timescale;
_last = _time;
// update console
if (FP.Console != null)
{
FP.Console.Update();
}
// update loop
if (!Paused)
{
Update();
}
// update input
Input.Update();
// update timer
_time = _renderTime = FP.GetTimer();
FP._updateTime = _time - _updateTime;
// render loop
if (!Paused)
{
Render();
}
// update timer
_time = _platformTime = FP.GetTimer();
FP._renderTime = _time - _renderTime;
FP._gameTime = _time - _gameTime;
}
private void Render()
{
var t = FP.GetTimer();
if (_frameLast == 0)
{
_frameLast = t;
}
// render loop
FP.Screen.Clear(ClearColor);
if (FP._world.Visible)
{
var view = new View(FP.Screen.DefaultView);
view.Rotation = -FP.Camera.Angle;
view.Zoom(FP.Camera.Zoom);
// don't need to set the position
FP.Screen.SetView(view);
FP._world.Render();
}
FP.Console.Render();
Draw.Render();
FP.Screen.Display();
// more timing stuff
t = FP.GetTimer();
_frameList.Add(t - _frameLast);
_frameListSum += t - _frameLast;
if (_frameList.Count > 10)
{
_frameListSum -= _frameList[0];
_frameList.RemoveAt(0);
}
FP.Framerate = 1000 / ((float)_frameListSum / (float)_frameList.Count);
_frameLast = t;
}
/// <summary>
/// Engine constructor
/// </summary>
/// <param name="width">The width of your game.</param>
/// <param name="height">The height of your game.</param>
/// <param name="framerate">The game framerate, in frames per second (default 60).</param>
public Engine(uint width, uint height, float framerate = 60)
{
// Engine properties
FP.Width = width;
FP.Height = height;
FP.Framerate = framerate;
FP.Fixed = true;
FP.TimeInFrames = false;
// Globals
FP.Tweener = new Tweener();
FP.Engine = this;
FP.Screen = new RenderWindow(new VideoMode(FP.Width, FP.Height), "");
FP._world = new World();
FP.Camera = new Camera();
FP.Console = new Punk.Debugging.Console();
CheckWorld();
FP.Screen.Clear();
// Random
FP.RandomizeSeed();
// Timing
FP.Timer = new Stopwatch();
FP.Timer.Restart();
FP._time = (uint)FP.Timer.ElapsedMilliseconds;
_frameList = new List <uint>();
FP.Timescale = 1;
// Window events
FP.Screen.Closed += new EventHandler(OnClosed);
FP.Screen.GainedFocus += new EventHandler(OnFocusGained);
FP.Screen.LostFocus += new EventHandler(OnFocusLost);
Library.LoadEmbeddedAssets();
Input.Init();
// FIXME: Currently only FixedFramerateLoop is hooked up.
// FIXME: Framerate independent loops may not be possible without timer callbacks like Flash has.
_rate = 1000.0f / FP.Framerate;
Init();
if (FP.Fixed)
{
_skip = _rate * (MaxFrameSkip + 1);
_last = _prev = FP.GetTimer();
while (FP.Screen.IsOpen())
{
FP.Screen.DispatchEvents();
FP.Screen.SetTitle(Math.Round(1000.0f / (FP._gameTime)).ToString());
FixedFramerateLoop();
}
}
else
{
_last = FP.GetTimer();
while (FP.Screen.IsOpen())
{
FP.Screen.DispatchEvents();
FramerateIndependantLoop();
}
}
}
private void FixedFramerateLoop()
{
// update timer
_time = FP.GetTimer();
_delta += (_time - _last);
_last = _time;
// quit if a frame hasn't passed
if (_delta < _rate)
{
return;
}
// update timer
_gameTime = _time;
FP._platformTime = _time - _platformTime;
// update console
if (FP.Console != null)
{
FP.Console.Update();
}
// update loop
if (_delta > _skip)
{
_delta = _skip;
}
while (_delta >= _rate)
{
FP.Elapsed = _rate * FP.Timescale * 0.001f;
// update timer
_updateTime = _time;
_delta -= _rate;
_prev = _time;
// update loop
if (!Paused)
{
Update();
}
// update input
Input.Update();
// update timer
_time = FP.GetTimer();
FP._updateTime = _time - _updateTime;
}
// update timer
_renderTime = _time;
// render loop
if (!Paused)
{
Render();
}
FP.Console.Render();
// update timer
_time = _platformTime = FP.GetTimer();
FP._renderTime = _time - _renderTime;
FP._gameTime = _time - _gameTime;
}
