底图圆形
Draft Circle |
Menu location |
---|
Draft → Circle |
Workbenches |
Draft, Arch |
Default shortcut |
C I |
Introduced in version |
0.7 |
See also |
Draft Arc, Draft Ellipse |
描述
底图圆形工具通过用户输入的两个点(中心点与半径),或通过拾取切线,或上述若干组合来在当前的工作平面上创建一个圆形。它将根据Draft Tray中的Draft Linestyle来创建圆形。
此工具与Draft Arc工具的工作方式很相似,区别在于前者创建的是一个完整的圆周。要绘制椭圆形请使用Draft Ellipse工具。
两点定一圆
如何使用
- 点击 Draft Circle按钮,或先后按下C、I键。
- 在3D视图中单击第一个点,或输入一个coordinate并按下 add point按钮。
- 在3D视图中单击第二个点,或输入一个半径值。
通过双击树状视图(tree view)中的元素或点击 Draft Edit按钮即可编辑对应圆形。届时,您就可将中心点与半径点移动到预定的新位置。
创建圆形之后,通过将其第一角度(first angle)与最后角度(last angle)两个属性设置为不同值,便可以将它转换为一条弧。
Options
- The primary use of the circle tool is by picking two points, the centre and a point on the circumference.
- By pressing Alt, you can select a tangent instead of picking a point. You can therefore construct several types of circles by selecting one, two or three tangents.
- To enter coordinates manually, simply enter the numbers, then press Enter between each X, Y and Z component. You can press the add point button when you have entered the desired values to insert the point.
- Press T or click the checkbox to toggle continue mode. If continue mode is on, the Circle tool will restart after you finish the circle, allowing you to draw another one without pressing the tool button again.
- Press L or click the checkbox to toggle filled mode. If filled mode is on, the circle will create a filled face (数据Make Face
true
); if not, the circle will not make a face (数据Make Facefalse
). - Hold Ctrl while drawing to force snapping your point to the nearest snap location, independently of the distance.
- Hold Shift while drawing to constrain your second point horizontally or vertically in relation to the first one.
- Press Esc or the Close button to abort the current command.
属性
圆形对象享有Draft Arc中的所有属性,但是有些属性仅对圆形而言才有意义。
Data
- 数据First Angle: specifies the starting angle of the circle; normally 0°.
- 数据Last Angle: specifies the ending angle of the circle; normally 0°.
- 数据Radius: specifies the radius of the circle.
- 数据Make Face: specifies if the Circle makes a face or not. If it is
true
a face is created, otherwise only the circumference is considered part of the object. This property only works if the shape is a full circumference.
- For it to be a full circle 数据First Angle and 数据Last Angle should have the same value; otherwise, a Draft Arc is displayed. The values 0° and 360° aren't considered the same, so if these two values are used, the circle will not form a face.
View
- 视图Pattern: specifies a Draft Pattern with which to fill the face of the circle. This property only works if 数据Make Face is
true
, and if 视图Display Mode is "Flat Lines". - 视图Pattern Size: specifies the size of the Draft Pattern.
Scripting
See also: Draft API and FreeCAD Scripting Basics.
The Circle tool can be used in macros and from the Python console by using the following function:
Circle = makeCircle(radius, placement=None, face=None, startangle=None, endangle=None, support=None)
Circle = makeCircle(Part.Edge, placement=None, face=None, startangle=None, endangle=None, support=None)
- Creates a
Circle
object with givenradius
in millimeters.radius
can also be aPart.Edge
, whoseCurve
attribute must be aPart.Circle
.
- If a
placement
is given, it is used; otherwise the shape is created at the origin. - If
face
isTrue
, the circle will make a face, that is, it will appear filled. - If
startangle
andendangle
are given in degrees, and have different values, they are used and the object appears as a Draft Arc.
示例:
import FreeCAD, Draft
Circle1 = Draft.makeCircle(200)
ZAxis = FreeCAD.Vector(0, 0, 1)
p2 = FreeCAD.Vector(1000, 1000, 0)
place2 = FreeCAD.Placement(p2, FreeCAD.Rotation(ZAxis, 0))
Circle2 = Draft.makeCircle(500, placement=place2)
p3 = FreeCAD.Vector(-1000, -1000, 0)
place3 = FreeCAD.Placement(p3, FreeCAD.Rotation(ZAxis, 0))
Circle3 = Draft.makeCircle(750, placement=place3)
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
- 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
User documentation
- 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, Mesh, OpenSCAD, Part, PartDesign, Points, Reverse Engineering, Robot, Sketcher, Spreadsheet, Surface, TechDraw, Test Framework
- Hubs: User hub, Power users hub, Developer hub