/*
* Returns false if camera didn't move
*/
private bool ComputeCameraMovement()
{
var frameDurationFactor = (float)(App.Current.TimeSinceLastFrame) / FRAME_DURATION_AT_60_FPS;
if (PositionDistance.Length() > STOP_DISTANCE_THRESHOLD ||
TargetDistance.Length() > STOP_DISTANCE_THRESHOLD ||
MoveVelocity.Length() > STOP_DISTANCE_THRESHOLD ||
_lookingAroundDelta.Length() > STOP_DISTANCE_THRESHOLD ||
_manipulatedByMouseWheel ||
_orbitDelta.Length() > 0.001f ||
_manipulatedByKeyboard)
{
if (_orbitDelta.Length() > 0.001f)
{
OrbitByAngle(_orbitDelta);
_orbitDelta *= new Vector2(ORBIT_HORIZONTAL_FRICTION, ORBIT_VERTICAL_FRICTION) / frameDurationFactor;
}
if (MoveVelocity.Length() > MaxMoveVelocity)
{
MoveVelocity *= MaxMoveVelocity / MoveVelocity.Length();
}
else if (!_manipulatedByKeyboard)
{
MoveVelocity *= (1 - _frictionKeyboardManipulation) / frameDurationFactor;
}
_cameraPositionGoal += MoveVelocity;
_cameraTargetGoal += MoveVelocity + _lookingAroundDelta;
_lookingAroundDelta = Vector3.Zero;
PositionDistance *= CAMERA_MOVE_FRICTION / frameDurationFactor;
TargetDistance *= CAMERA_MOVE_FRICTION / frameDurationFactor;
_isTransitionActive = true;
_manipulatedByMouseWheel = false;
return(true);
}
else
{
StopTransitionOfPositionTarget();
_isTransitionActive = false;
return(false);
}
}
private bool ManipulateCameraByKeyboard()
{
var frameDurationFactor = (float)(App.Current.TimeSinceLastFrame);
Vector3 viewDir, sideDir, upDir;
_showSceneControl.RenderSetup.CalcDirections(out viewDir, out sideDir, out upDir);
var viewDirLength = viewDir.Length();
var initialVelocity = MoveVelocity.Length() < STOP_DISTANCE_THRESHOLD ? INITIAL_MOVE_VELOCITY : 0;
var increaseAccelerationWithZoom = (_cameraPositionGoal - _cameraTargetGoal).Length() / 10f;
var accelFactor = _cameraAcceleration * increaseAccelerationWithZoom;
var interactionKeysPressedCount = 0;
foreach (var key in _pressedKeys)
{
switch (key)
{
case Key.A:
case Key.Left:
MoveVelocity -= sideDir * (accelFactor + initialVelocity) * frameDurationFactor;
interactionKeysPressedCount++;
break;
case Key.D:
case Key.Right:
MoveVelocity += sideDir * (accelFactor + initialVelocity) * frameDurationFactor;
interactionKeysPressedCount++;
break;
case Key.W:
case Key.Up:
MoveVelocity += viewDir * (accelFactor + initialVelocity) / viewDirLength * frameDurationFactor;
interactionKeysPressedCount++;
break;
case Key.S:
case Key.Down:
MoveVelocity -= viewDir * (accelFactor + initialVelocity) / viewDirLength * frameDurationFactor;
interactionKeysPressedCount++;
break;
case Key.E:
MoveVelocity += upDir * (accelFactor + initialVelocity) * frameDurationFactor;
interactionKeysPressedCount++;
break;
case Key.X:
MoveVelocity -= upDir * (accelFactor + initialVelocity) * frameDurationFactor;
interactionKeysPressedCount++;
break;
case Key.F:
MoveVelocity = Vector3.Zero;
_cameraPositionGoal = new Vector3(0, 0, DEFAULT_CAMERA_POSITION_Z);
_cameraTargetGoal = new Vector3(0, 0, 0f);
interactionKeysPressedCount++;
break;
// Center Camera
case Key.C:
var delta = _showSceneControl.RenderSetup.TransformGizmo.IsGizmoActive
? _showSceneControl.RenderSetup.TransformGizmo.GizmoToWorld.TranslationVector - _cameraTargetGoal
: -_cameraTargetGoal;
_cameraTargetGoal += delta;
_cameraPositionGoal += delta;
interactionKeysPressedCount++;
break;
}
}
return(interactionKeysPressedCount > 0);
}