Draft: Bez Curve
Draft BezCurve |
poziția meniului |
---|
Draft → BezCurve |
Ateliere |
Draft, Arch |
scurtătură |
B Z |
Prezentat în versiune |
- |
A se vedea, de asemenea, |
nici unul |
Descriere
Instrumentul BezCurve creează o Bezier Curve (sau o curbă Bezier în bucăți) din mai multe puncte din planul curent work plane. Este nevoie de linewidth and color setată anterior pe fila Activități.
The BezCurve tool curve uses control points to define the direction of the curve; on the other hand the Draft BSpline tool specifies the exact points through which the curve will go. To create exact circular or elliptical curves, use Draft Arc and Draft Ellipse.
Bezier curve defined by multiple control points
- Press the Draft BezCurve button, or press B then Z keys.
- Click a first point on the 3D view, or type a coordinate and press the add point button.
- Click additional points on the 3D view, or type a coordinate and press the add point button.
- Press Esc or the Close button, or double-click the last point to complete the edition.
Obiectul este creat ca o singură curbă Bezier de grad (număr_de_ puncte - 1). Aceasta poate fi modificată la o curbă Bezier în parte, de un anumit grad după crearea folosind editor proprietăți. Bezier Curves poate fi editat folosind Editare proiect.
The curve can be edited by double clicking on the element in the tree view, or by pressing the Draft Edit button. Then you can move the points to a new position, or click add point or remove point and then click on the curve to add or remove points. You can also change the constraint type of each point.
Noduri de Constrângere
Punctele finale ale segmentului într-o curbă Bezier în parte pot fi constrânse astfel încât punctele adiacente de control să fie tangente sau simetrice față de segmentele de la punctul final. Acest lucru se face după crearea obiectelor Draft Edit.
The segment endpoints can be constrained such that adjacent control points are tangent or symmetric to the segments at the endpoint. First, start editing the curve, then pick one of the tools and then pick a point. Click again on the tool to deactivate it, so you can move the point.
- sharp remove constraints on the points so the curve can have sharp corners.
- tangent force adjacent control points to be tangent.
- symmetric force adjacent control points to be tangent and equidistant.
Limitări
- Acest instrument nu este disponibil înainte de versiunea FreeCAD 0.14
- Proprietatea puncte nu apare încă în lista de proprietăți.
- OpenCascade nu suportă Bezier Curve cu grad> 25. Aceasta nu ar trebui să fie o problemă în practică.
Cum se foloseşte
- Apăsați butonul Draft BezCurve , sau apăsați W apoi tastele I
- Faceți clic pe un prim punct din vizualizarea 3D sau tastați un coordinate
- Faceți clic pe un punct suplimentar în vizualizarea 3D sau tastați un coordinate
- Apăsați F sau C sau faceți dublu clic pe ultimul punct sau faceți clic pe primul punct pentru a termina sau a închide filamentul/polilinia. Dacă filamentul este închis, acesta va fi, de asemenea, o fațetă, chiar dacă acesta apare ca o rețea wireframe.
- Apăsați tasta F sau butonul Finish pentru a finaliza funcția B spline, lăsând-o deschisă
- Press C or the Close button or click on the first point to finish the spline, but making it closed by adding a last segment between the last point and the first one.
- Press X, Y or Z after a point to constrain the next point on the given axis.
- To enter coordinates manually, simply enter the numbers, then press ENTER between each X, Y and Z component.
- Press R or click the checkbox to check/uncheck the Relative button. If relative mode is on, the coordinates of the next point are relative to the last one. If not, they are absolute, taken from the (0,0,0) origin point.
- Press T or click the checkbox to check/uncheck the Continue button. If continue mode is on, the BezCurve tool will restart after you finish or close it, allowing you to draw another one without pressing the BezCurve button again.
- Press CTRL while drawing to force snapping your point to the nearest snap location, independently of the distance.
- Press SHIFT while drawing to constrain your next point horizontally or vertically in relation to the last one.
- Press W or press the Wipe button to remove the existing segments and start the spline from the last point.
- Press CTRL+Z or press the Undo button to undo the last point.
- Apăsați tasta ESC sau butonul Cancel penru a abandona comanda BezCurve .
Proprietăți
Data
- DateDegree: specifies the degree of the Bezier curve or the individual segments.
- DateClosed: specifies if the curve is closed or not. If the curve is initially open, this value is
false
; setting it totrue
will draw a segment to close the curve. If the curve is initially closed, this value istrue
; setting it tofalse
will remove the last segment, and make the curve open. - DateMake Face: 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 DateClosed istrue
.
- Note: do not set DateMake Face to
true
if the curve intersects itself, as it won't create a proper face.
- DateContinuity: (read-only) when the curve is closed, indicates the continuity of the curve
[0]
, or[0,0]
. Otherwise it's[]
.
View
- VizualizareArrow Size: specifies the size of the symbol displayed at the end of the curve.
- VizualizareArrow Type: specifies the type of symbol displayed at the end of the curve, which can be dot, circle, arrow, and tick.
- VizualizareEnd Arrow: specifies whether to show a symbol at the last point of the curve, so it can be used as an annotation line.
- VizualizarePattern: specifies a Draft Pattern with which to fill the face of the closed curve. This property only works if DateMake Face is
true
, and if VizualizareDisplay Mode is "Flat Lines". - VizualizarePattern Size: specifies the size of the Draft Pattern.
Scrip-Programare
Instrumentul BezCurve poate fi folosit în macros și din consola Python utilizând următoarea funcție:
BezCurve = makeBezCurve(pointslist, closed=False, placement=None, face=None, support=None, degree=None)
BezCurve = makeBezCurve(Part.Wire, closed=False, placement=None, face=None, support=None, degree=None)
- Creați un obiect tip curbă Bezier din lista dată a vectorilor. În loc de o listă de puncte, puteți trece și o secțiune parțială.
Example:
import FreeCAD, Draft
p1 = FreeCAD.Vector(0, 0, 0)
p2 = FreeCAD.Vector(1000, 1000, 0)
p3 = FreeCAD.Vector(2000, 0, 0)
p4 = FreeCAD.Vector(1500, -2000, 0)
BezCurve1 = Draft.makeBezCurve([p1, p2, p3, p4], closed=True)
BezCurve2 = Draft.makeBezCurve([p4, 1.3*p2, p1, 4.1*p3], closed=True)
BezCurve3 = Draft.makeBezCurve([1.7*p3, 1.5*p4, 2.1*p2, p1], closed=True)
- 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, 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