public PointM SnapToLine(PointM pos, LineSnapDirection snapMode = LineSnapDirection.Perpendicular, bool infiniteLine = true)
{
var result = SnapToLine(pos.ToVector(), snapMode, infiniteLine);
if (!result.IsEmpty)
{
return(PointM.FromVector(result, pos.Unit ?? P1.Unit ?? P2.Unit));
}
return(PointM.Empty);
}
public Vector SnapToLine(Vector pos, LineSnapDirection snapMode = LineSnapDirection.Perpendicular, bool infiniteLine = true)
{
Vector result = Vector.Empty;
if (snapMode == LineSnapDirection.Horizontal)
{
result = Equation.GetPointForY(pos.Y);
}
else if (snapMode == LineSnapDirection.Vertical)
{
result = Equation.GetPointForX(pos.X);
}
else
{
var perp = Line.GetPerpendicular(Equation, pos);
Equation.Intersect(perp, out result);
}
if (!result.IsEmpty && !infiniteLine)
{
var v1 = result - P1.ToVector();
var v2 = result - P2.ToVector();
if (!v1.Normalized.EqualOrClose(Direction, 0.0001))
{
return(snapMode == LineSnapDirection.Perpendicular ? P1.ToVector() : Vector.Empty);
}
else if (v1.Length > Length.NormalizedValue)
{
return(snapMode == LineSnapDirection.Perpendicular ? P2.ToVector() : Vector.Empty);
}
if (!v2.Normalized.EqualOrClose(Direction * -1, 0.0001))
{
return(snapMode == LineSnapDirection.Perpendicular ? P2.ToVector() : Vector.Empty);
}
else if (v2.Length > Length.NormalizedValue)
{
return(snapMode == LineSnapDirection.Perpendicular ? P1.ToVector() : Vector.Empty);
}
}
return(result);
}
