/// <summary>
/// Process mouse drag and hover events and draw velocity vectors if enabled
/// </summary>
private void ProcessVelocityArrows()
{
if (!_simControl.SceneElementsDisplayParameters.DrawVelocityVectors)
{
return;
}
Vector3d velocity = new Vector3d();
Vector3 hpos = new Vector3();
Vector3 pos = new Vector3();
for (int i = 0; i < _bodies.Length; i++)
{
if (_bodies[i].isActiveAndEnabled)
{
velocity = _simControl.SceneElementsDisplayParameters.EditGlobalVelocity ?
_bodies[i].Velocity :
_bodies[i].RelativeVelocity;
pos = (Vector3)(_bodies[i].Position + velocity * _simControl.SceneElementsDisplayParameters.VelocitiesArrowsScale);
Handles.CapFunction capFunc;
switch (_simControl.SceneElementsDisplayParameters.VelocityHandlerType)
{
case VelocityHandlerType.Circle:
capFunc = Handles.CircleHandleCap;
break;
case VelocityHandlerType.Sphere:
capFunc = Handles.SphereHandleCap;
break;
case VelocityHandlerType.Dot:
capFunc = Handles.DotHandleCap;
break;
default:
continue;
}
Handles.color = Color.white;
hpos = Handles.FreeMoveHandle(pos, Quaternion.identity, _simControl.SceneElementsDisplayParameters.HandleScale * HandleUtility.GetHandleSize(pos), Vector3.zero, capFunc);
if (pos != hpos)
{
// Project onto orbit plane.
if (_bodies[i].AttractorRef != null && !_simControl.SceneElementsDisplayParameters.EditGlobalVelocity && (_simControl.SceneElementsDisplayParameters.KeepOrbitPlaneWhileChangeVelocity || _simControl.KeepBodiesOnEclipticPlane))
{
Ray ray = HandleUtility.GUIPointToWorldRay(Event.current.mousePosition);
hpos = CelestialBodyUtils.GetRayPlaneIntersectionPoint((Vector3)_bodies[i].Position, (Vector3)_bodies[i].OrbitData.OrbitNormal, ray.origin, ray.direction);
}
velocity = (new Vector3d(hpos) - _bodies[i].Position) / _simControl.SceneElementsDisplayParameters.VelocitiesArrowsScale;
Undo.RecordObject(_bodies[i], "Velocity change");
if (_simControl.SceneElementsDisplayParameters.EditGlobalVelocity)
{
_bodies[i].Velocity = velocity;
}
else
{
_bodies[i].RelativeVelocity = velocity;
}
_bodies[i].OrbitData.IsDirty = true;
if (_simControl.SceneElementsDisplayParameters.SelectBodyWhenDraggingVelocity)
{
Selection.activeGameObject = _bodies[i].gameObject;
}
}
}
}
ShowAllVelocitiesVectors();
}
