Snapping, UCS & Booleans
The complete snap engine is fully integrated into all Architron (LWCAD) tools. Snap modes can by set using the Attribute Manager or the OGL quick buttons in the viewport.
Universal Coordinate System (UCS)
UCS allows you to create a user-defined adjustable work-plane.
There are three basic modes:
Off - UCS is disabled
Auto - automatic mode, work-plane created after first mouse click, working on edges, polygons and flat NURBS surfaces. Auto-UCS on NURBS surfaces is not supported yet.
Fix - fixed mode, work-plane is fixed
Corner option defines the corner point of the surface that is used to create work-plane in Auto UCS mode.
Show Ruler display the UCS coordinates in the viewport
Snapping
Snap engine works with these types of geometry:
polygons
splines (line, bezier, b-spline)
NURBS (Architron)
Grid
Grid option defines the value of the grid in the work-plane. Grid snapping works only with active UCS.
Angle
Angle snapping only works with certain types of tools and handles.
Angle snap value can be set to 90º, 45º, 30º, 10º or a user defined value.
Angle snapping can be enabled-disabled while holding CTRL key while dragging the handle in the viewport.
Snapping Modes:
Surf - snapping to the nearest surface
Edg - snapping to the nearest surface edges
Pnt - snapping to the nearest surface points
Perp - snapping to the nearest perpendicular edges
Tan - snapping to the nearest tangent edges. (reserved for NURBS)
Int - snapping to the intersections between edges
Cent - snapping to the center of the nearest surface or edge.
Rul: - snapping to the ruler which is placed on the nearest edge.
Rul Count - division count of the ruler.
Destructive Booleans (NURBS)
NURBS Destructive boolean operations are implemented in all Nurbs Primitives tools.
Actual version works with NURBS curves only!
Nurbs Booleans offers the following modes:
Add - the tool geometry unifies with the selected NURBS object
Sub - the tool geometry subtracts from the selected NURBS object
Int - the tool geometry intersects with the selected NURBS object, the intersected tool geometry remains in the object
Cut - the selected NURBS object intersects with the tool geometry, the tool geometry is not included in the object