public virtual void OnBeginDrag(PointerEventData eventData)
{
GcEventData pointerEventData = eventData as GcEventData;
if (pointerEventData == null)
{
return;
}
Pose pose = pointerEventData.Pointer.EndPointWorldPose;
// Cache the initial grab state.
this._initialGrabOffset =
Quaternion.Inverse(this.transform.rotation) *
(this.transform.position - pose.position);
this._initialGrabRotation =
Quaternion.Inverse(pose.rotation) *
this.transform.rotation;
_initialWorldPose = pose;
_initialTransformPose = new Pose(transform.position, transform.rotation);
_initialTransScale = transform.localScale;
var rigidbody = this.GetComponent <Rigidbody>();
if (rigidbody != null)
{
rigidbody.isKinematic = true;
}
_dragCount += 1;
// Capture pointer events.
pointerEventData.Pointer.CapturePointer(this.gameObject);
}
public virtual void OnEndDrag(PointerEventData eventData)
{
GcEventData pointerEventData = eventData as GcEventData;
if (pointerEventData == null)
{
_isTouching = false;
return;
}
_dragCount -= 1;
// Release the pointer.
pointerEventData.Pointer.CapturePointer(null);
// If the grabbable object has a rigidbody component,
// restore its original isKinematic state.
if (_dragCount <= 0)
{
var rigidbody = this.GetComponent <Rigidbody>();
if (rigidbody != null)
{
rigidbody.isKinematic = this._isKinematic;
}
}
_isTouching = false;
}
private void OnBeginTouch(PointerEventData eventData)
{
GcEventData pointerEventData = eventData as GcEventData;
if (pointerEventData == null)
{
return;
}
_beginTouch0 = pointerEventData.Pointer.GetTouch(0);
_beginTouch1 = pointerEventData.Pointer.GetTouch(1);
}
public virtual void OnDrag(PointerEventData eventData)
{
GcEventData pointerEventData = eventData as GcEventData;
if (pointerEventData == null)
{
return;
}
if (pointerEventData.TouchCount > 1)
{
if (!_isTouching)
{
_isTouching = true;
OnBeginTouch(eventData);
}
Touch currentTouch0 = pointerEventData.Pointer.GetTouch(0);
Touch currentTouch1 = pointerEventData.Pointer.GetTouch(1);
// rotate
Vector2 lastCenterPos = (_beginTouch0.position + _beginTouch1.position) / 2f;
Vector2 currentCenterPos = (currentTouch0.position + currentTouch1.position) / 2f;
float angleX = 12f * TwistSensitivity.x * 360f * (currentCenterPos.y - lastCenterPos.y) / Screen.height;
float angleY = 12f * TwistSensitivity.y * 360f * (lastCenterPos.x - currentCenterPos.x) / Screen.width;
this.transform.rotation = Quaternion.Euler(angleX, angleY, 0f) * _initialTransformPose.rotation;
// scale
float lastDistance = Vector2.Distance(_beginTouch0.position, _beginTouch1.position);
float currentDistance = Vector2.Distance(currentTouch0.position, currentTouch1.position);
float deltaScale = currentDistance / lastDistance;
Vector3 newScale = _initialTransScale * deltaScale;
newScale = Vector3.ClampMagnitude(newScale, maxScaleMagnitude);
if (newScale.magnitude < minScaleMagnitude)
{
return;
}
transform.localScale = newScale;
}
else
{
if (_isTouching)
{
return;
}
if (pointerEventData.ButtonId == 0)// drag
{
Pose pose = pointerEventData.Pointer.EndPointWorldPose;
// Update the grab object's rotation.
this.transform.rotation =
pose.rotation * this._initialGrabRotation;
//Update the grab object's position.
this.transform.position =
pose.position +
(this.transform.rotation * this._initialGrabOffset);
}
else if (pointerEventData.ButtonId == 1)// rotate
{
Pose pose = pointerEventData.Pointer.EndPointWorldPose;
float angleX = TwistSensitivity.x * 360f * (pose.position.y - _initialWorldPose.position.y);
float angleY = TwistSensitivity.y * 360f * (_initialWorldPose.position.x - pose.position.x);
this.transform.rotation = Quaternion.Euler(angleX, angleY, 0f) * _initialTransformPose.rotation;
}
else if (pointerEventData.ButtonId == 2)// scale
{
if (maxScaleMagnitude == minScaleMagnitude)
{
return;
}
Pose pose = pointerEventData.Pointer.EndPointWorldPose;
Vector3 newScale = _initialTransScale + _initialTransScale * (_initialWorldPose.position.z - pose.position.z);
newScale = Vector3.ClampMagnitude(newScale, maxScaleMagnitude);
if (newScale.magnitude < minScaleMagnitude)
{
return;
}
if (Vector3.Dot(Vector3.Normalize(newScale), Vector3.Normalize(_initialTransScale)) < 0f)
{
return;
}
transform.localScale = newScale;
}
}
}
