// same as LocalFrame, but LocalFrame may be tilted up/down, which we want to undo
public virtual Frame3f GetLevelViewFrame(CoordSpace eSpace)
{
// otherwise we can't just set y to 0...
Debug.Assert(eSpace == CoordSpace.WorldCoords);
Frame3f viewF = UnityUtil.GetGameObjectFrame(ActiveCamera.GameObject(), eSpace);
float fAngle = VRUtil.PlaneAngleSigned(Vector3f.AxisZ, viewF.Z, 1);
return(new Frame3f(viewF.Origin, Quaternionf.AxisAngleD(Vector3f.AxisY, fAngle)));
}
public Capture Update_TransformCamera(InputState input, CaptureData data)
{
// need both controllers to have valid positions
if (input.bLeftControllerActive == false || input.bRightControllerActive == false)
{
return(Capture.Continue);
}
float fSceneScale = cockpit.Scene.GetSceneScale();
HandInfo hi = (HandInfo)data.custom_data;
// deadzones and scaling factors
const float fZoomDeadzoneInM = 0.1f;
const float fZoomScale = 25.0f;
const float fPanDeadzoneInM = 0.05f;
const float fPanScale = 25.0f;
const float fAzimuthDeadzoneInDeg = 10.0f;
const float fAltitudeDeadzoneInDeg = 15.0f;
const float fTrackAlpha = 0.1f; // larger == faster tracking
// zoom is indicated by moving hands together/apart. But we want to get rid of
// influence from other gestures (like rotate below) so we project to camera-right axis first.
Frame3f camFrame = cockpit.ActiveCamera.GetWorldFrame();
Vector3 right = camFrame.X;
float fOrig = Vector3.Dot((hi.rightStartF.Origin - hi.leftStartF.Origin), hi.camRight);
float fCur = Vector3.Dot((input.RightHandFrame.Origin - input.LeftHandFrame.Origin), right);
float deltaZAbs = fCur - fOrig;
float deltaZ = (hi.bInZoomDeadzone) ? ApplyDeadzone(deltaZAbs, fZoomDeadzoneInM) : deltaZAbs - hi.fZoomShift;
if (Math.Abs(deltaZ) > 0 && hi.bInZoomDeadzone)
{
hi.bInZoomDeadzone = false;
hi.fZoomShift = deltaZAbs - deltaZ;
}
hi.runningZ = Mathf.Lerp(hi.runningZ, deltaZ, fTrackAlpha);
float tz = hi.runningZ * fZoomScale;
if (tz != 0.0f && hi.activeXForm == TransformType.NoTransform)
{
hi.activeXForm = TransformType.Zoom;
}
// translation is done by moving both hands in unison. We find the midpoint
// of the start and current pairs, delta is translate
Vector3f cOrig = 0.5f * (hi.leftStartF.Origin + hi.rightStartF.Origin);
Vector3f cCur = 0.5f * (input.LeftHandFrame.Origin + input.RightHandFrame.Origin);
Vector3f translateO = cCur - cOrig;
Vector3f translate = (hi.bInPanDeadzone) ? ApplyDeadzone(translateO, fPanDeadzoneInM) : translateO - hi.vPanShift;
if (translate.LengthSquared > 0 && hi.bInPanDeadzone)
{
hi.bInPanDeadzone = false;
hi.vPanShift = translateO - translate;
}
hi.runningT = Vector3.Lerp(hi.runningT, translate, fTrackAlpha);
Vector3f tx = hi.runningT * fPanScale * fSceneScale;
if (tx.Length != 0.0f && hi.activeXForm == TransformType.NoTransform)
{
hi.activeXForm = TransformType.Pan;
}
// azimuth (left/right rotate) is specified by making a spin-the-wheel gesture,
// where one hand slides forward and the other back. We guess a center-of-rotation
// as the midpoint of the start and current frames, and then average the two rotation
// angles in the XZ plane (by the vectors on the left and right sides).
// *But* if there is also a translation, this goes wonky, so we have to subtract
// of the translation first!
// (above only applies if we permit simultaneous rotate & translate, which is currently disabled...)
//Vector3 rotTranslate = translate;
Vector3f rotTranslate = Vector3.zero;
Vector3f origCenterXY = new Vector3(cOrig[0], 0, cOrig[2]);
Vector3f shiftLeftO = input.LeftHandFrame.Origin - rotTranslate;
Vector3f shiftRightO = input.RightHandFrame.Origin - rotTranslate;
Vector3f shiftCenter = 0.5f * (shiftLeftO + shiftRightO);
Vector3f curCenterXY = new Vector3(shiftCenter[0], 0, shiftCenter[2]);
Vector3f sharedC = 0.5f * (origCenterXY + curCenterXY);
float aLeft = VRUtil.PlaneAngleSigned(hi.leftStartF.Origin - sharedC, shiftLeftO - sharedC, 1);
float aRight = VRUtil.PlaneAngleSigned(hi.rightStartF.Origin - sharedC, shiftRightO - sharedC, 1);
float azO = -(aLeft + aRight) * 0.5f;
float az = (hi.bInAzimuthDeadzone) ? ApplyDeadzone(azO, fAzimuthDeadzoneInDeg) : azO - hi.fAzimuthShift;
if (Math.Abs(az) > 0 && hi.bInAzimuthDeadzone)
{
hi.bInAzimuthDeadzone = false;
hi.fAzimuthShift = azO - az;
}
hi.runningAz = Mathf.Lerp(hi.runningAz, az, fTrackAlpha);
float fAzimuth = hi.runningAz;
if (fAzimuth != 0.0f && hi.activeXForm == TransformType.NoTransform)
{
hi.activeXForm = TransformType.Rotate;
}
// altitude (up/down rotate) is specified by tilting controllers up or down.
// This is the trickiest one as hands tend to tilt up/down during the other actions.
// We compute an average tilt up/down angle at the start, and then the per-hand delta
// each frame, as well as the average delta, and use the smallest of these.
// mean hand-tilt at start frame
float o1 = VRUtil.PlaneAngleSigned(hi.leftStartF.Rotation * Vector3.forward, hi.camForward, hi.camRight);
float o2 = VRUtil.PlaneAngleSigned(hi.rightStartF.Rotation * Vector3.forward, hi.camForward, hi.camRight);
float oa = (o1 + o2) * 0.5f;
// per-frame hand tilt
Vector3 camfw = camFrame.Z, camright = camFrame.X;
float c1 = VRUtil.PlaneAngleSigned(input.LeftHandFrame.Rotation * Vector3.forward, camfw, camright);
float c2 = VRUtil.PlaneAngleSigned(input.RightHandFrame.Rotation * Vector3.forward, camfw, camright);
// use the smallest per-hand tilt delta, to prevent one-hand tilting from having an effect
float d1 = oa - c1, d2 = oa - c2;
float altO = (Mathf.Abs(d1) < Mathf.Abs(d2)) ? d1 : d2;
// also consider the average, to reduce crazy popping from each hand tilting in opposite direction
float dm = 0.5f * (d1 + d2);
altO = (Mathf.Abs(altO) < Mathf.Abs(dm)) ? altO : dm;
// deadzone and smoothing
float alt = (hi.bInAltitudeDeadzone) ? ApplyDeadzone(altO, fAltitudeDeadzoneInDeg) : altO - hi.fAltitudeShift;
if (Math.Abs(alt) > 0 && hi.bInAltitudeDeadzone)
{
hi.bInAltitudeDeadzone = false;
hi.fAltitudeShift = altO - alt;
}
hi.runningAlt = Mathf.Lerp(hi.runningAlt, alt, fTrackAlpha);
float fAltitude = hi.runningAlt;
if (fAltitude != 0.0f && hi.activeXForm == TransformType.NoTransform)
{
hi.activeXForm = TransformType.Rotate;
}
// reset view to state when we started, then apply the accumulated rotate/zoom/translate
cockpit.ActiveCamera.Manipulator().SetCurrentSceneState(cockpit.Scene, hi.camState);
if (hi.activeXForm == TransformType.Rotate)
{
cockpit.ActiveCamera.Manipulator().SceneOrbit(cockpit.Scene, cockpit.ActiveCamera, fAzimuth, fAltitude);
}
else if (hi.activeXForm == TransformType.Pan)
{
cockpit.ActiveCamera.Manipulator().SceneTranslate(cockpit.Scene, tx, false);
}
else if (hi.activeXForm == TransformType.Zoom)
{
cockpit.ActiveCamera.Manipulator().SceneZoom(cockpit.Scene, cockpit.ActiveCamera, tz);
}
return(Capture.Continue);
}