Draft BezCurve/cs

CubicBezCurve

Point

Draft

Popis

The command creates a single Bézier curve with a ÚdajeDegree that is number_of_points - 1. It can be transformed into a piecewise Bézier curve by reducing this property.

The Draft BezCurve and the Draft CubicBezCurve commands use control points to define the position and curvature of the spline. The Draft BSpline command, on the other hand, specifies the exact points through which the curve will pass.

Bézier curve defined by multiple points

See also: Draft Tray, Draft Snap and Draft Constrain.

1. There are several ways to invoke the command:
   • Press the Bézier curve button.
   • Draft: Select the Drafting → Bézier tools → Bézier curve option from the menu.
   • BIM: Select the 2D Drafting → Bézier curve option from the menu.
   • Use the keyboard shortcut: B then Z.
2. The Bézier curve task panel opens. See Options for more information.
3. Pick the first point in the 3D view, or type coordinates and press the Enter point button.
4. Pick additional points in the 3D view, or type coordinates and press the Enter point button.
5. Press Esc or the Close button to finish the command.

The single character keyboard shortcuts available in the task panel can be changed. See Draft Preferences. The shortcuts mentioned here are the default shortcuts (for version 1.0).

Notes

Vlastnosti

See also: Property editor.

A Draft BezCurve object is derived from a Part Part2DObject and inherits all its properties. It also has the following additional properties:

Data

Draft

• ÚdajeArea (Area): (read-only) specifies the area of the face of the curve. The value will be 0.0 if ÚdajeMake Face if false or the face cannot be created.
• ÚdajeClosed (Bool): specifies if the curve is closed or not. If the curve is initially open this value is false, setting it to true will draw a segment to close the curve. If the curve is initially closed this value is true, setting it to false will remove the last segment and make the curve open.
• ÚdajeContinuity (IntegerList): (read-only) specifies the continuity of the curve.
• ÚdajeDegree (Integer): specifies the degree of the curve.
• ÚdajeLength (Length): (read-only) specifies the total length of the curve.
• ÚdajeMake Face (Bool): specifies if the curve makes a face or not. If it is true a face is created, otherwise only the perimeter is considered part of the object. This property only works if ÚdajeClosed is true and if the curve does not self-intersect.
• ÚdajePoints (VectorList): specifies the control points of the curve in its local coordinate system.

View

Draft

• PohledArrow Size (Length): specifies the size of the symbol displayed at the end of the curve.
• PohledArrow Type (Enumeration): specifies the type of symbol displayed at the end of the curve, which can be Dot, Circle, Arrow, Tick or Tick-2.
• PohledEnd Arrow (Bool): specifies whether to show a symbol at the end of the curve, so it can be used as an annotation line.
• PohledPattern (Enumeration): specifies the Draft Pattern with which to fill the face of the closed curve. This property only works if ÚdajeMake Face is true and if PohledDisplay Mode is Flat Lines.
• PohledPattern Size (Float): specifies the size of the Draft Pattern.

Scripting

bezcurve = make_bezcurve(pointslist, closed=False, placement=None, face=None, support=None, degree=None)
bezcurve = make_bezcurve(Part.Wire, closed=False, placement=None, face=None, support=None, degree=None)

Example:

import FreeCAD as App
import Draft

doc = App.newDocument()

p1 = App.Vector(0, 0, 0)
p2 = App.Vector(1000, 1000, 0)
p3 = App.Vector(2000, 0, 0)
p4 = App.Vector(1500, -2000, 0)

bezcurve1 = Draft.make_bezcurve([p1, p2, p3, p4], closed=True)
bezcurve2 = Draft.make_bezcurve([p4, 1.3*p2, p1, 4.1*p3], closed=True)
bezcurve3 = Draft.make_bezcurve([1.7*p3, 1.5*p4, 2.1*p2, p1], closed=True)

doc.recompute()

CubicBezCurve

Point

Draft

Draft

• 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

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• 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

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• 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

User documentation

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