private void MainWindowUpdateFrame(FrameEventArgs obj)
{
// Use seperate locks for update and render to avoid stuttering
lock (_updateFrameLock)
{
var userEvent = new UserInputStateEvent(KeyboardState.GetSnapshot(), MouseState.GetSnapshot(), obj.Time);
var task = Task.Run(async() =>
{
await EventChannel.Writer.WriteAsync(userEvent, _cancellationTokenManager.Token).AsTask();
});
task.Wait(_cancellationTokenManager.Token);
}
}
private async Task ProcessUserEvent(UserInputStateEvent userInputEvent)
{
if (userInputEvent.MouseState.IsButtonDown(MouseButton.Button1) && !pickingInfoRequested)
{
await _scene.AssertionUpdatesChannel.Writer.WriteAsync(new AssertionBatch
{
Assertions = new IAssertion[]
{
new GetPickingInfo((int)userInputEvent.MouseState.X, (int)userInputEvent.MouseState.Y)
}
});
pickingInfoRequested = true;
}
// Escape = quit
if (userInputEvent.KeyboardState.WasKeyDown(Keys.Escape))
{
if (!exitCalled)
{
exitCalled = true;
_renderWindow.Close();
}
}
// Take screenshot
if (userInputEvent.KeyboardState.WasKeyDown(Keys.S))
{
if (!screenshotEnqueued)
{
await _scene.AssertionUpdatesChannel.Writer.WriteAsync(new AssertionBatch
{
Assertions = new IAssertion[]
{
new GrabScreenshot()
}
});
screenshotEnqueued = true;
}
}
// Move left & right
bool hasLeft = userInputEvent.KeyboardState.IsKeyDown(Keys.Left);
bool hasRight = userInputEvent.KeyboardState.IsKeyDown(Keys.Right);
bool hasForward = userInputEvent.KeyboardState.IsKeyDown(Keys.Up);
bool hasBackward = userInputEvent.KeyboardState.IsKeyDown(Keys.Down);
// TODO: Cleanup
if (hasLeft || hasRight || hasForward || hasBackward)
{
var dX = (hasLeft, hasRight) switch {
(true, false) => 1.0f,
(false, true) => - 1.0f,
_ => 0.0f
};
var dZ = (hasForward, hasBackward) switch
{
(true, false) => 1.0f,
(false, true) => - 1.0f,
_ => 0.0f
};
// Left/Right
dX *= (float)userInputEvent.TimeSinceLastEventSeconds;
Vector3 moveVecLeftRight = new (-1, 0, 0); // we are looking in the negative z direction, therefore "right" is -1
moveVecLeftRight *= dX;
// Forward/Backward
dZ *= (float)userInputEvent.TimeSinceLastEventSeconds;
Vector3 moveVecForwardBackward = new(0, 0, -1); // forward = -z
moveVecForwardBackward *= dZ;
Vector3 newLocation = _currentCameraOrientation.CameraLocation.ToOpenTkVec3() + moveVecLeftRight + moveVecForwardBackward;
_currentCameraOrientation = _currentCameraOrientation with
{
CameraLocation = new (newLocation.X, newLocation.Y, newLocation.Z)
};
await _scene.AssertionUpdatesChannel.Writer.WriteAsync(new AssertionBatch
{
Assertions = new IAssertion[]
{
_currentCameraOrientation
}
});
}
}
