private static void UpdateArrowHeadDirections(LinearDimension dl)
{
var v = dl.DimensionLineP1 - dl.DimensionLineP2;
v.Normalize();
dl.ArrowHead1Direction = v;
v.Negate();
dl.ArrowHead2Direction = v;
}
private static Point GetOffsetPoint(Point p, LinearDimension dl)
{
var op = dl.OffsetPoint + (dl.Scale * dl.Offset * dl.OffsetDirection);
if (op != null)
{
var d = Vector.Multiply(op.Value - p, dl.OffsetDirection);
return(p + (d * dl.OffsetDirection));
}
return(p);
}
private static void InitializeOffsetVector(LinearDimension dl)
{
var v = dl.P1 - dl.P2;
v.Normalize();
var dir = Vector.Multiply(v, Rotate90Cw.Value);
if (!dl.OffsetDirection.Equals(dir))
{
dl.SetCurrentValue(OffsetDirectionProperty, dir);
dl.hasExplicitOffsetDirection = false;
}
}
private static void InitializeOffsetPoint(LinearDimension dl)
{
var d = Vector.Multiply(dl.P1 - dl.P2, dl.OffsetDirection);
Point op = d < 0
? dl.P2
: dl.P1;
if (dl.OffsetPoint == null)
{
return;
}
var offsetPoint = dl.OffsetPoint.Value;
if (IsNan(offsetPoint) || (offsetPoint - op).Length > 1e-3)
{
dl.SetCurrentValue(OffsetPointProperty, dl.P2);
dl.hasExplicitOffsetPoint = false;
}
}
