Sketcher SketchObject/it: Difference between revisions
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Un [[Sketcher_SketchObject/it|Sketcher SketchObject]], o formalmente un {{incode|Sketcher::SketchObject}}, è l'elemento base per creare oggetti 2D con l'ambiente [[Sketcher_Workbench/it|Sketcher]]. |
Un [[Sketcher_SketchObject/it|Sketcher SketchObject]], o formalmente un {{incode|Sketcher::SketchObject}}, è l'elemento base per creare oggetti 2D con l'ambiente [[Sketcher_Workbench/it|Sketcher]]. |
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{{Incode|Sketcher::SketchObject}} deriva da [[Part_Part2DObject/it|Part Part2DObject]], il che significa che è un oggetto [[Part Feature/it|Part Feature]] specializzato per la geometria 2D. Come Part2DObject, SketchObject può essere collegato a piani e facce. Inoltre, SketchObject è in grado di gestire i vincoli geometrici delle linee e delle curve disegnate al suo interno. |
{{Incode|Sketcher::SketchObject}} deriva da [[Part_Part2DObject/it|Part Part2DObject]], il che significa che è un oggetto [[Part Feature/it|Part Feature]] specializzato per la geometria 2D. Come Part2DObject, anche SketchObject può essere collegato a piani e facce. Inoltre, SketchObject è in grado di gestire i vincoli geometrici delle linee e delle curve disegnate al suo interno. |
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[[File:FreeCAD_core_objects.svg|800px]] |
[[File:FreeCAD_core_objects.svg|800px]] |
Revision as of 15:24, 1 December 2019
Introduzione
Un Sketcher SketchObject, o formalmente un Sketcher::SketchObject
, è l'elemento base per creare oggetti 2D con l'ambiente Sketcher.
Sketcher::SketchObject
deriva da Part Part2DObject, il che significa che è un oggetto Part Feature specializzato per la geometria 2D. Come Part2DObject, anche SketchObject può essere collegato a piani e facce. Inoltre, SketchObject è in grado di gestire i vincoli geometrici delle linee e delle curve disegnate al suo interno.
Diagramma semplificato delle relazioni tra gli oggetti principali in FreeCAD. La classe Sketcher::SketchObject
è specializzata per le forme 2D e inoltre può gestire i vincoli.
Utilizzo
- Switch to the Sketcher Workbench.
- Press Sketcher NewSketch.
- Select a Sketch orientation: XY-plane, XZ-plane, or YZ-plane. Optionally also choose Reverse direction, and give an Offset value.
- Press OK.
Although the SketchObject can be used by itself to draw on a plane, it is most commonly used in conjunction with the PartDesign Workbench to create extruded solids.
- Switch to the PartDesign Workbench.
- Press PartDesign Body.
- Press PartDesign NewSketch.
- Select feature: XY_Plane (Base plane), XZ_Plane (Base plane), or YZ_Plane (Base plane).
- Press OK.
Properties
See Property for all property types that scripted objects can have.
A Sketcher SketchObject (Sketcher::SketchObject
class) is derived from a Part Part2DObject (Part::Part2DObject
class), therefore it shares all the latter's properties.
In addition to the properties described in Part Part2DObject, the basic Sketcher SketchObject has the following properties in the property editor.
Data
Attachment
- DatiMap Mode: See Part Attachment for more information on all attachment mapping modes.
Sketch
- DatiConstraints: named constraints, if they exist; otherwise it is an empty list
[]
.
View
Auto Constraints
- VistaAutoconstraints: if
true
it will try setting constraints when the geometry is drawn.
Visibility automation
- VistaEditing Workbench: normally
SketcherWorkbench
, it is the name of the workbench to activate when editing the sketch. - VistaHide Dependent: if
true
all objects that depend on the sketch are hidden when opening the sketch. - VistaRestore Camera: if
true
the camera position is saved before opening the sketch, and is restored after closing it. - VistaShow Links: if
true
all objects used in links to external geometry are shown when opening the sketch. - VistaShow Support: if
true
all objects this sketch is attached to are shown when opening the sketch.
Scripting
See also: FreeCAD Scripting Basics, and scripted objects.
See Part Feature for the general information.
A Sketcher SketchObject is created with the addObject()
method of the document.
import FreeCAD as App
doc = App.newDocument()
obj = App.ActiveDocument.addObject("Sketcher::SketchObject", "Name")
obj.Label = "Custom label"
- General: Create sketch, Edit sketch, Map sketch to face, Reorient sketch, Validate sketch, Merge sketches, Mirror sketch, Leave sketch, View sketch, View section, Toggle grid, Toggle snap, Configure rendering order, Stop operation
- Sketcher geometries: Point, Line, Arc, Arc by 3 points, Circle, Circle by 3 points, Ellipse, Ellipse by 3 points, Arc of ellipse, Arc of hyperbola, Arc of parabola, B-spline by control points, Periodic B-spline by control points, B-spline by knots, Periodic B-spline by knots, Polyline, Rectangle, Centered rectangle, Rounded rectangle, Triangle, Square, Pentagon, Hexagon, Heptagon, Octagon, Regular polygon, Slot, Fillet, Corner-preserving fillet, Trim, Extend, Split, External geometry, Carbon copy, Toggle construction geometry
- Sketcher constraints:
- Geometric constraints: Coincident, Point on object, Vertical, Horizontal, Parallel, Perpendicular, Tangent, Equal, Symmetric, Block
- Dimensional constraints: Lock, Horizontal distance, Vertical distance, Distance, Radius or weight, Diameter, Auto radius/diameter, Angle, Refraction (Snell's law)
- Constraint tools: Toggle driving/reference constraint, Activate/deactivate constraint
- Sketcher tools: Select unconstrained DoF, Select associated constraints, Select associated geometry, Select redundant constraints, Select conflicting constraints, Show/hide internal geometry, Select origin, Select horizontal axis, Select vertical axis, Symmetry, Clone, Copy, Move, Rectangular array, Remove axes alignment, Delete all geometry, Delete all constraints
- Sketcher B-spline tools: Show/hide B-spline degree, Show/hide B-spline control polygon, Show/hide B-spline curvature comb, Show/hide B-spline knot multiplicity, Show/hide B-spline control point weight, Convert geometry to B-spline, Increase B-spline degree, Decrease B-spline degree, Increase knot multiplicity, Decrease knot multiplicity, Insert knot, Join curves
- Sketcher virtual space: Switch virtual space
- Additional: Sketcher Dialog, Preferences, Sketcher scripting
- 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, Arch, Assembly, CAM, Draft, FEM, Inspection, Mesh, OpenSCAD, Part, PartDesign, Points, Reverse Engineering, Robot, Sketcher, Spreadsheet, Surface, TechDraw, Test Framework
- Hubs: User hub, Power users hub, Developer hub