discontinuedPackage jet_cad_floor_plan has been discontinued and replaced by jet_cad_2d_plan.

measuringDirection function

Vector2 measuringDirection(DimKind kind, Vector2 p0, Vector2 p1, Transform2 m,)

The measuring direction u (spec 11 D6), a world unit vector, of a dimension of kind from world point p0 to world point p1 in a group whose local-to-world transform is m:

• aligned: (p1 − p0) / |p1 − p0| when |p1 − p0| > wallJoin.linear; otherwise m's local x in world, normalised (R-8: a degenerate aligned pair still lays out);
• horizontal: m's local x in world, normalised;
• vertical: m's local y in world, normalised.

Linear axes are the group's own (decision 17): world x and y while the group is at the identity, turning with it under a rotation. The one definition every caller uses (the plan's Ruling 11-3): the layout, the placement function, and decision 19's choice (decideEnd).

Implementation

Vector2 measuringDirection(DimKind kind, Vector2 p0, Vector2 p1, Transform2 m) {
  switch (kind) {
    case DimKind.aligned:
      final d = p1 - p0;
      final len = d.length;
      if (len > wallJoin.linear) return d / len;
      return m.transformDirection(Vector2(1, 0)).normalized();
    case DimKind.horizontal:
      return m.transformDirection(Vector2(1, 0)).normalized();
    case DimKind.vertical:
      return m.transformDirection(Vector2(0, 1)).normalized();
  }
}