internal override List <Target> GenerateTargets(UserSocket floating)
{
// copied from Lined.GenerateDefaultTargets and modified
List <Target> targets = new List <Target>();
// add all of the vertices
// note that using m_intDefinedVertices rather than Vertices.Count omits the last closing vertex if closed
for (int index = 0; index <= m_DefinedVertices - 1; index++)
{
targets.Add(new Target(this, Vertices[index], Target.Types.Vertex, floating, Target.Priorities.Vertex, shapeIndex: index));
}
// check the lines
for (int index = 0; index <= Vertices.Count - 2; index++)
{
// it is relatively quick to check if the point is close enough to the bounding rectangle for the arc
RectangleF bounds = new RectangleF(Vertices[index].X, Vertices[index].Y, 0, 0);
Geometry.Extend(ref bounds, Vertices[index + 1]);
Geometry.Extend(ref bounds, m_ControlPoints[index * 2]);
Geometry.Extend(ref bounds, m_ControlPoints[index * 2 + 1]);
if (Geometry.DirtyDistance(floating.Centre, bounds) <= Target.MaximumInterestDistance)
{
float maximumError = MaximumTError(index) * 3; // doesn't need to be so precise, because the target point release be on the Bezier
// said the user probably can't tell if it is a little bit short or long
Target create = GenerateLineTargetOnOneBezier(floating, GetSingleCurve(index), targets, maximumError, index);
if (create != null)
{
targets.Add(create);
}
}
}
return(targets);
}
internal override List <UserSocket> GetPointsWhichSnapWhenMoving()
{
if (!AutoTargets)
{
return(null);
}
List <UserSocket> list = (from pt in Vertices select UserSocket.CreateForPoint(pt)).ToList();
list.Add(UserSocket.CreateForPoint(Middle()));
return(list);
}
public override void CopyFrom(Datum other, CopyDepth depth, Mapping mapID)
{
base.CopyFrom(other, depth, mapID);
UserSocket socket = (UserSocket)other;
m_Centre = socket.m_Centre;
m_Exit = socket.m_Exit;
Options = socket.Options;
Classification = socket.Classification;
m_Bounds = RectangleF.Empty;
}
// base does Centre and Middle
internal override List <Target> GenerateTargets(UserSocket floating)
{
if (!AutoTargets)
{
return(null);
}
List <Target> targets = new List <Target>();
Lined.AddLineTargets(this, targets, floating, m_Bounds.GetPoints(), true);
targets.Add(new Target(this, Centre, Target.Types.Centre, floating));
return(targets);
}
internal override List <UserSocket> GetPointsWhichSnapWhenMoving()
{
if (!AutoTargets)
{
return(null);
}
List <UserSocket> list = new List <UserSocket>();
foreach (PointF pt in m_Bounds.GetPoints())
{
list.Add(UserSocket.CreateForPoint(pt));
}
list.Add(UserSocket.CreateForPoint(Middle()));
return(list);
}
public float RotationRequired(UserSocket other)
{
// rotation required of this socket to make it fit other socket. 0 means they match or one or both don't care about angle
if (m_Exit.IsEmpty)
{
return(0);
}
if (other.ExitVector.IsEmpty)
{
return(0);
}
float angle = other.ExitVector.VectorAngle() - m_Exit.VectorAngle() - Geometry.ANGLE180;
// angle180 on end, because they are expected to be OPPOSITE
return(Geometry.NormaliseAnglePlusMinus180(angle));
}
public bool GenderCompatible(UserSocket other)
{
if ((Options & OptionsEnum._Gender) == OptionsEnum._Gender)
{
return(true); // this shape doesn't care
}
if ((other.Options & OptionsEnum._Gender) == OptionsEnum._Gender)
{
return(true); // other shape doesn't care
}
if ((Options & OptionsEnum._Gender) == (other.Options & OptionsEnum._Gender))
{
return(false); // genders same- fails
}
return(true);
}
public bool AngleCompatibile(UserSocket other)
{
// vectors must be opposite (apart from rounding error), if both defined
if (m_Exit.IsEmpty)
{
return(true);
}
if (other.ExitVector.IsEmpty)
{
return(true);
}
float angle = Geometry.AbsoluteAngularDifference(m_Exit.VectorAngle(), other.ExitVector.VectorAngle());
if (angle > Geometry.ANGLE180 - Geometry.NEGLIGIBLEANGLESMALL)
{
return(true);
}
return(false);
}
// a more convenient constructor for shapes when generating targets:
// might also want to store the source socket eventually
public Target(Shape shape, PointF position, Types type, UserSocket source, Priorities priority = Priorities.Standard, float intersectionCertainty = Geometry.PI / 2, int shapeIndex = -1)
{
// ObjSource if the moving item for which targets have been requested
// -1 is used as the default shape index to make it obvious when it was not defined (0 is usually valid)
Shape = shape;
Position = position;
Priority = priority;
Type = type;
Debug.Assert(priority == Priorities.Intersection || intersectionCertainty == Geometry.ANGLE90); // certainty has no effect unless it is an intersection
if (type == Types.Intersection)
{
Uncertainty = Geometry.ANGLE90 - intersectionCertainty;
}
if (source != null)
{
Distance = Geometry.DistanceBetween(source.Centre, position); // otherwise Distance left as 0. Not used for real snapping targets, but can be used for some dummy ones
}
ShapeIndex = shapeIndex;
if (type == Types.GrabSpot && !(this is ForGrabSpot))
{
throw new ArgumentException(nameof(type));
}
}
public const float MAXIMUMSNAPROTATION = Geometry.ANGLE45 / 2; // most to autorotate a moving shape
internal override List <Target> GenerateTargets(UserSocket floating)
{
List <Target> list = new List <Target>();
EnsureSocketList();
foreach (UserSocket socket in m_Sockets)
{
if ((socket.Options & UserSocket.OptionsEnum.ShapeSnap) > 0)
{
// if they aren't compatible we still generate the shape, but mark it as failed
Target newTarget = new Target(this, socket.Centre, Target.Types.Vertex, floating, Target.Priorities.Vertex);
if (!floating.ClassCompatible(socket) || !floating.GenderCompatible(socket))
{
newTarget.Mismatch = true;
}
else
{
float angle = floating.RotationRequired(socket);
if (Math.Abs(angle) > MAXIMUMSNAPROTATION)
{
newTarget = null; // angle so far out it is not a match at all
}
else if (angle != 0)
{
// can autorotate
newTarget.RotationRequired = angle;
}
}
if (newTarget != null)
{
list.Add(newTarget);
}
}
}
return(list);
}
internal override List <Target> GenerateTargets(UserSocket floating)
{
return(base.GenerateTargetsDefault(floating, false));
}
internal override List <Target> GenerateTargets(UserSocket floating)
{
return(MaskShape.GenerateTargets(floating));
}
internal override List <Target> GenerateTargets(UserSocket floating) => Element.GenerateTargets(floating);
internal override List <Target> GenerateTargets(UserSocket floating) => base.GenerateTargetsDefault(floating, Closed());
public bool ClassCompatible(UserSocket other)
{
return(string.IsNullOrEmpty(Classification) || string.IsNullOrEmpty(other.Classification) || Classification == other.Classification);
}
internal override List <Target> GenerateTargets(UserSocket floating)
{
return(new List <Target> {
new Target(this, m_Centre, Target.Types.Centre, floating)
});
}