public Drag(List<EditorObject> modified, Transform2 transform)
{
IsMarker = true;
foreach (EditorObject e in modified)
{
_modified.Add(new MementoDrag(e));
}
_transform = transform.ShallowClone();
}
/// <summary>
/// Determine a position that is sufficiently far away from all portals so that it isn't ambiguous which side of a
/// portal the position is at.
/// </summary>
/// <param name="portals"></param>
/// <param name="portalPrevious">The last portal that was exited.</param>
/// <param name="transform"></param>
/// <param name="velocity"></param>
private static Transform2 AddMargin(IEnumerable<IPortal> portals, IPortal portalPrevious, Transform2 transform, Transform2 velocity)
{
transform = transform.ShallowClone();
foreach (IPortal p in portals)
{
if (!Portal.IsValid(p))
{
continue;
}
LineF exitLine = new LineF(Portal.GetWorldVerts(p));
Vector2 position = transform.Position;
double distanceToPortal = MathExt.PointLineDistance(position, exitLine, true);
if (distanceToPortal < Portal.EnterMinDistance)
{
Vector2 exitNormal = p.WorldTransform.GetRight();
Side sideOf;
if (p == portalPrevious)
{
sideOf = exitLine.GetSideOf(position + velocity.Position);
}
else
{
sideOf = exitLine.GetSideOf(position - velocity.Position);
}
if (sideOf != exitLine.GetSideOf(exitNormal + p.WorldTransform.Position))
{
exitNormal = -exitNormal;
}
Vector2 pos = exitNormal * (Portal.EnterMinDistance - (float)distanceToPortal);
transform.Position += pos;
break;
}
}
return transform;
}
private static Transform2 UndoPortalTransform(BodyData data, Transform2 transform)
{
Transform2 copy = transform.ShallowClone();
if (data.Parent == null)
{
return copy;
}
return UndoPortalTransform(
data.Parent,
copy.Transform(Portal.GetLinkedTransform(data.BodyParent.Portal).Inverted()));
}
public override void SetVelocity(Transform2 velocity)
{
Velocity = velocity.ShallowClone();
base.SetVelocity(velocity);
}
public override void SetTransform(Transform2 transform)
{
Transform = transform.ShallowClone();
base.SetTransform(transform);
}
/// <summary>
/// Returns new velocity from entering portal.
/// </summary>
/// <param name="portal">Portal being entered.</param>
/// <param name="intersectT">Intersection point on the portal.</param>
/// <param name="velocity">Velocity before entering.</param>
public static Transform2 EnterVelocity(IPortal portal, float intersectT, Transform2 velocity, bool ignorePortalVelocity = false)
{
Debug.Assert(IsValid(portal));
Matrix4 matrix = GetLinkedMatrix(portal);
Vector2 origin = Vector2Ext.Transform(new Vector2(), matrix);
Transform2 velocityClone = velocity.ShallowClone();
if (!ignorePortalVelocity)
{
velocityClone.Position -= portal.WorldVelocity.Position;
velocityClone.Rotation -= portal.WorldVelocity.Rotation;
velocityClone.Position -= GetAngularVelocity(portal, intersectT);
}
velocityClone.Position = Vector2Ext.Transform(velocityClone.Position, matrix);
velocityClone.Position -= origin;
if (portal.WorldTransform.MirrorX == portal.Linked.WorldTransform.MirrorX)
{
velocityClone.Rotation = -velocityClone.Rotation;
}
if (!ignorePortalVelocity)
{
velocityClone.Position += portal.Linked.WorldVelocity.Position;
velocityClone.Rotation += portal.Linked.WorldVelocity.Rotation;
velocityClone.Position += GetAngularVelocity(portal.Linked, intersectT);
}
return velocityClone;
}
public Drag(HashSet<MementoDrag> modified, Transform2 transform)
{
_modified.UnionWith(modified);
_transform = transform.ShallowClone();
}
public void SetTransform(Transform2 transform)
{
_transform = transform.ShallowClone();
}
