public override KeyValuePair <double, Handle> GetSelectionDistance(SysPoint point)
{
BoardPoint boardPoint = Board.GetBoardPoint(point);
double distance = Math.Max(Math.Abs(Position.X - boardPoint.X), Math.Abs(Position.Y - boardPoint.Y)) * Board.ZoomFactor;
if (distance <= 6)
{
return(new KeyValuePair <double, Handle>(distance, null));
}
// if we're drawing a motion vector and the vector is not controlled by waypoints, allow the user to grab that, too
if (ShouldDrawMotionVector && Speed > 0 && !Children.Any(c => c is Waypoint))
{
Vector2 vector = new Vector2(0, Speed * ManeuveringBoard.VectorTime).Rotate(-Direction);
// use two pixels before the endpoint as the hotspot, since that's closer to the center of mass of the arrow head
vector.GetNormal(vector.Length - 2 / Board.ZoomFactor);
distance = boardPoint.DistanceTo(Position + vector) * Board.ZoomFactor;
if (distance <= 5)
{
return(new KeyValuePair <double, Handle>(distance, vectorHandle));
}
}
return(new KeyValuePair <double, Handle>(double.NaN, null));
}
public override KeyValuePair <double, Handle> GetSelectionDistance(SysPoint point)
{
double distance;
if (!ShouldRender)
{
distance = double.NaN;
}
else
{
BoardPoint boardPoint = Board.GetBoardPoint(point);
BoardPoint observerPosition = GetEffectiveObserverPosition();
Line2 bearingLine = new Line2(observerPosition, new Vector2(0, 1).Rotate(-Bearing));
distance = Math.Abs(bearingLine.DistanceTo(boardPoint)) * Board.ZoomFactor;
// the distance measurement considers the entire infinite line, but we only want to consider the ray starting from the observer, so
// we'll ignore the portion of the line on the other side of the observer point
if (distance > 4 || bearingLine.ClosestPointOnSegment(boardPoint) == bearingLine.Start &&
boardPoint.DistanceTo(bearingLine.Start) * Board.ZoomFactor > 4)
{
distance = double.NaN;
}
}
return(new KeyValuePair <double, Handle>(distance, null));
}
public override void Update(Shape shape, BoardPoint dragStart, BoardPoint dragPoint)
{
UnitShape unit = (UnitShape)shape;
Vector2 vector = dragPoint - dragStart;
unit.Direction = ManeuveringBoard.SwapBearing(vector.Angle);
unit.Speed = vector.Length * (1.0 / ManeuveringBoard.VectorTime);
}
public override KeyValuePair <double, Handle> GetSelectionDistance(SysPoint point)
{
BoardPoint boardPoint = Board.GetBoardPoint(point);
double distanceFromStart = boardPoint.DistanceTo(Start) * Board.ZoomFactor;
double distanceFromEnd = boardPoint.DistanceTo(End) * Board.ZoomFactor;
if (distanceFromStart <= 5 || distanceFromEnd <= 5)
{
return(new KeyValuePair <double, Handle>(Math.Min(distanceFromStart, distanceFromEnd),
distanceFromStart < distanceFromEnd ? startHandle : endHandle));
}
double distanceFromSegment = new Line2(Start, End).SegmentDistanceTo(boardPoint) * Board.ZoomFactor;
return(new KeyValuePair <double, Handle>(distanceFromSegment <= 4 ? distanceFromSegment : double.NaN, moveHandle));
}
public override KeyValuePair <double, Handle> GetSelectionDistance(SysPoint point)
{
BoardPoint boardPoint = Board.GetBoardPoint(point);
// get the minimum from either the center point or the circle itself, whichever is smaller
double distanceFromCenter = boardPoint.DistanceTo(Position), distanceFromEdge = Math.Abs(distanceFromCenter - Radius);
if (distanceFromCenter < distanceFromEdge)
{
distanceFromCenter *= Board.ZoomFactor;
return(new KeyValuePair <double, Handle>(distanceFromCenter <= 5 ? distanceFromCenter : double.NaN, null));
}
else
{
distanceFromEdge *= Board.ZoomFactor;
return(new KeyValuePair <double, Handle>(distanceFromEdge <= 4 ? distanceFromEdge : double.NaN, edgeHandle));
}
}
public BoardPoint GetPositionAt(TimeSpan time)
{
Waypoint applicableWaypoint, previousWaypoint;
applicableWaypoint = GetApplicableWaypoint(time, out previousWaypoint);
if (applicableWaypoint == null)
{
return(Position + Velocity * time.TotalSeconds);
}
else
{
bool crossedZero = previousWaypoint == null || (previousWaypoint.Time <TimeSpan.Zero && applicableWaypoint.Time> TimeSpan.Zero);
bool thisIsPrev = previousWaypoint == null || crossedZero && time >= TimeSpan.Zero;
bool thisIsNext = previousWaypoint != null && crossedZero && time < TimeSpan.Zero;
double previousTime = thisIsPrev ? 0 : previousWaypoint.Time.TotalSeconds;
double nextTime = thisIsNext ? 0 : applicableWaypoint.Time.TotalSeconds;
BoardPoint previousPosition = thisIsPrev ? Position : previousWaypoint.Position;
BoardPoint nextPosition = thisIsNext ? Position : applicableWaypoint.Position;
return(previousPosition + (nextPosition - previousPosition) * ((time.TotalSeconds - previousTime) / (nextTime - previousTime)));
}
}
public override void Render(Graphics graphics)
{
if (ShouldRender)
{
BoardPoint observerPosition = GetEffectiveObserverPosition();
observerPosition = new BoardPoint(observerPosition.X * Board.ZoomFactor, -observerPosition.Y * Board.ZoomFactor);
Vector2 screenVector = new Vector2(0, -1).Rotate(Bearing);
Line2 bearingLine = new Line2(observerPosition, screenVector);
// since the bearing line is infinitely long, we'll test the intersection of the line against all four sides of the clipping
// rectangle, and draw the line to the furthest intersection
BoardRect clipRect = new BoardRect(graphics.VisibleClipBounds);
BoardPoint endPoint = BoardPoint.Invalid;
double maxDistance = 0;
for (int i = 0; i < 4; i++)
{
Line2 edge = clipRect.GetEdge(i);
LineIntersection intersection = bearingLine.GetIntersectionInfo(edge);
if (intersection.OnSecond)
{
double distance = observerPosition.DistanceTo(intersection.Point);
// find the closest point on the segment to ensure that we're only considering intersections in the forward direction of the
// vector
if (distance > maxDistance && bearingLine.ClosestPointOnSegment(intersection.Point) != bearingLine.Start)
{
endPoint = intersection.Point;
maxDistance = distance;
}
}
}
if (endPoint.IsValid)
{
graphics.DrawLine(Pen, observerPosition.ToPointF(), endPoint.ToPointF());
graphics.DrawCircle(Pen, observerPosition.ToPointF(), 3);
RenderTime(graphics, (observerPosition + (endPoint - observerPosition) * 0.5).ToPointF());
}
}
}
public override BoardPoint GetStartPoint(Shape shape, BoardPoint dragStart)
{
return(shape.Position);
}
public override void Update(Shape shape, BoardPoint dragStart, BoardPoint dragPoint)
{
((LineShape)shape).Position = new BoardPoint(dragPoint.X - dragStart.X, dragPoint.Y - dragStart.Y);
}
public override BoardPoint GetStartPoint(Shape shape, BoardPoint dragStart)
{
// return a "point" (actually a vector) representing the difference between the drag start and the line center
return((dragStart - ((LineShape)shape).Position).ToPoint());
}
public override void Update(Shape shape, BoardPoint dragStart, BoardPoint dragPoint)
{
((LineShape)shape).End = dragPoint;
}
public override void Update(Shape shape, BoardPoint dragStart, BoardPoint dragPoint)
{
CircleShape circle = (CircleShape)shape;
circle.Radius = (dragPoint - circle.Position).Length;
}
public abstract void Update(Shape shape, BoardPoint dragStart, BoardPoint dragPoint);
public virtual BoardPoint GetStartPoint(Shape shape, BoardPoint dragStart)
{
return(dragStart);
}
