Draftː Polilinea in B-spline
Polilinea in B-spline |
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Draft → Polilinea in B-spline |
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Polilinea, B-spline |
Descrizione
Questo strumento converte i segmenti di una linea spezzata, qui definita DWire, in curve di tipo B-spline, e viceversa.
Conversione di una polilinea in una B-Spline e di una B-spline chiusa in un contorno chiuso
Utilizzo
- Selezionare una linea Wire o una BSpline. Lo strumento è disabilitato se nessun oggetto è selezionato.
- Premere il pulsante Da Wire a BSpline
Crea un nuovo oggetto; l'oggetto originale non viene modificato.
Note: if a closed wire with sharp edges is used to create a spline, the new object may have self intersecting curve segments, and may not be visible in the 3D view. If this is the case, manually set DatiMake Face to false
to see the new shape, or set DatiClosed to false
to create an open shape.
Opzioni
Non ci sono opzioni per questo strumento. O funziona con l'oggetto selezionato o non funziona.
Script
Vedere anche: Draft API e Nozioni di base sugli script di FreeCAD.
Per lo strumento WireToBSpline non è disponibile un'interfaccia di programmazione; tuttavia, creare un nuovo oggetto dai punti di un altro è semplice.
The Points
attribute of an object is a list with the points that comprise that object; this list can be passed to functions that build geometry. Each point is defined by its FreeCAD.Vector
, with units in millimeters.
Esempio:
import FreeCAD, Draft
# Make a spline from the points of a wire
p1 = FreeCAD.Vector(1000, 1000, 0)
p2 = FreeCAD.Vector(2000, 1000, 0)
p3 = FreeCAD.Vector(2500, -1000, 0)
p4 = FreeCAD.Vector(3500, -500, 0)
base_wire = Draft.makeWire([p1, p2, p3, p4])
points1 = base_wire.Points
spline = Draft.makeBSpline(points1)
# Make a wire from the points of a spline
base_spline = Draft.makeBSpline([-p1, -1.3*p2, -1.2*p3, -2.1*p4])
points2 = base_spline.Points
Wire = Draft.makeWire(points2)
- Drafting: Line, Polyline, Fillet, Arc, Arc by 3 points, Circle, Ellipse, Rectangle, Polygon, B-spline, Cubic Bézier curve, Bézier curve, Point, Facebinder, ShapeString, Hatch
- Annotation: Text, Dimension, Label, Annotation styles, Annotation scale
- Modification: Move, Rotate, Scale, Mirror, Offset, Trimex, Stretch, Clone, Array, Polar array, Circular array, Path array, Path link array, Point array, Point link array, Edit, Subelement highlight, Join, Split, Upgrade, Downgrade, Wire to B-spline, Draft to sketch, Set slope, Flip dimension, Shape 2D view
- Draft Tray: Select plane, Set style, Toggle construction mode, AutoGroup
- Snapping: Snap lock, Snap endpoint, Snap midpoint, Snap center, Snap angle, Snap intersection, Snap perpendicular, Snap extension, Snap parallel, Snap special, Snap near, Snap ortho, Snap grid, Snap working plane, Snap dimensions, Toggle grid
- Miscellaneous: Apply current style, Layer, Manage layers, Add a new named group, Move to group, Select group, Add to construction group, Toggle normal/wireframe display, Create working plane proxy, Heal, Show snap toolbar
- Additional: Constraining, Pattern, Preferences, Import Export Preferences, DXF/DWG, SVG, OCA, DAT
- Context menu:
- Layer container: Merge layer duplicates, Add new layer
- Layer: Activate this layer, Select layer contents
- Text: Open hyperlinks
- Wire: Flatten
- Working plane proxy: Write camera position, Write objects state
- Getting started
- Installation: Download, Windows, Linux, Mac, Additional components, Docker, AppImage, Ubuntu Snap
- Basics: About FreeCAD, Interface, Mouse navigation, Selection methods, Object name, Preferences, Workbenches, Document structure, Properties, Help FreeCAD, Donate
- Help: Tutorials, Video tutorials
- Workbenches: Std Base, Assembly, BIM, CAM, Draft, FEM, Inspection, Material, Mesh, OpenSCAD, Part, PartDesign, Points, Reverse Engineering, Robot, Sketcher, Spreadsheet, Surface, TechDraw, Test Framework
- Hubs: User hub, Power users hub, Developer hub