public void UpdateFrame(long frame)
{
var currMillis = _lastMillis;
_lastMillis = frame;
if (currMillis == 0)
{
return;
}
if (!Focus || !Viewport.IsUnlocked(this) || !Viewport.Viewport.IsFocused)
{
if (FreeLook || FreeLookToggle)
{
FreeLook = FreeLookToggle = false;
SetFreeLook();
}
return;
}
var seconds = (frame - currMillis) / 1000f;
var units = CameraNavigationViewportSettings.ForwardSpeed * seconds;
var down = KeyboardState.IsAnyKeyDown(Keys.W, Keys.A, Keys.S, Keys.D);
if (!down)
{
_downMillis = 0;
}
else if (_downMillis == 0)
{
_downMillis = currMillis;
}
if (CameraNavigationViewportSettings.TimeToTopSpeed > 0)
{
var downFor = (frame - _downMillis) / (CameraNavigationViewportSettings.TimeToTopSpeed * 1000);
if (downFor >= 0 && downFor < 1)
{
units *= (float)_easing.Evaluate((double)downFor);
}
}
if (FreeLook)
{
if (KeyboardState.Shift)
{
units *= 2;
}
if (KeyboardState.Ctrl)
{
units /= 2;
}
}
if (float.IsNaN(units) || float.IsInfinity(units) || units < 0.001f)
{
units = 0;
}
var move = units;
var tilt = 2f;
// These keys are used for hotkeys, don't want the 3D view to move about when trying to use hotkeys.
var ignore = !FreeLook && KeyboardState.IsAnyKeyDown(Keys.ShiftKey, Keys.ControlKey, Keys.Alt);
IfKey(Keys.W, () => Camera.Advance(move), ignore);
IfKey(Keys.S, () => Camera.Advance(-move), ignore);
IfKey(Keys.A, () => Camera.Strafe(-move), ignore);
IfKey(Keys.D, () => Camera.Strafe(move), ignore);
IfKey(Keys.Q, () => Camera.AscendAbsolute(move), ignore);
IfKey(Keys.E, () => Camera.AscendAbsolute(-move), ignore);
// Arrow keys are not really used for hotkeys all that much, so we allow shift+arrows to match Hammer's keys
var shiftDown = KeyboardState.IsKeyDown(Keys.ShiftKey);
var otherDown = KeyboardState.IsAnyKeyDown(Keys.ControlKey, Keys.Alt);
IfKey(Keys.Right, () => { if (shiftDown)
{
Camera.Strafe(move);
}
else
{
Camera.Pan(-tilt);
} }, otherDown);
IfKey(Keys.Left, () => { if (shiftDown)
{
Camera.Strafe(-move);
}
else
{
Camera.Pan(tilt);
} }, otherDown);
IfKey(Keys.Up, () => { if (shiftDown)
{
Camera.Ascend(move);
}
else
{
Camera.Tilt(-tilt);
} }, otherDown);
IfKey(Keys.Down, () => { if (shiftDown)
{
Camera.Ascend(-move);
}
else
{
Camera.Tilt(tilt);
} }, otherDown);
}