private int?UpdateInLoop()
{
if (_first)
{
_first = false;
OnResize(this, EventArgs.Empty);
}
int?timeSteps = 0;
if (!Window.window.Exists)
{
return(null);
}
if (Window.window.WindowState == OpenTK.WindowState.Minimized)
{
return(timeSteps);
}
Input.Start();
if (DemoHarness != null)
{
//We'll let the delegate's logic handle the variable time steps.
timeSteps = DemoHarness.Update(1 / 60f); // TODO
//At the moment, rendering just follows sequentially. Later on we might want to distinguish it a bit more with fixed time stepping or something. Maybe.
DemoHarness.Render(Renderer);
}
Renderer.Render(Camera);
Surface.Present();
Input.End();
return(timeSteps);
}
public void Run(DemoHarness harness)
{
DemoHarness = harness;
if (!true) // TODO: Controls like F1 don't work in this case
{
Task.Run(Loop);
Window.Run(() => { });
}
else
{
Window.Run(Update);
}
}
private void OnResize(object sender, EventArgs args)
{
//Note that minimizing or resizing the window to invalid sizes don't result in actual resize attempts. Zero width rendering surfaces aren't allowed.
if (Window.window.Width <= 0 || Window.window.Height <= 0)
{
return;
}
var resolution = new Int2(Window.window.Width, Window.window.Height);
//We just don't support true fullscreen in the demos. Would be pretty pointless.
Renderer.Surface.Resize(resolution, false);
Camera.AspectRatio = resolution.X / (float)resolution.Y;
DemoHarness?.OnResize(resolution);
}
public void CheckForDemoSwap(DemoHarness harness)
{
if (harness.input.WasPushed(harness.controls.ChangeDemo.Key))
{
TrackingInput = !TrackingInput;
TargetDemoIndex = -1;
}
if (TrackingInput)
{
for (int i = 0; i < harness.input.TypedCharacters.Count; ++i)
{
var character = harness.input.TypedCharacters[i];
if (character == '\b')
{
//Backspace!
if (TargetDemoIndex >= 10)
{
TargetDemoIndex /= 10;
}
else
{
TargetDemoIndex = -1;
}
}
else
{
if (TargetDemoIndex < harness.demoSet.Count)
{
var digit = character - '0';
if (digit >= 0 && digit <= 9)
{
TargetDemoIndex = Math.Max(0, TargetDemoIndex) * 10 + digit;
}
}
}
}
if (harness.input.WasPushed(OpenTK.Input.Key.Enter))
{
//Done entering the index. Swap the demo if needed.
TrackingInput = false;
harness.TryChangeToDemo(TargetDemoIndex);
}
}
}