底图捕捉工具
|
Menu location |
---|
View → Toolbars → Draft Snap |
Workbenches |
Draft, Arch |
Default shortcut |
None |
Introduced in version |
- |
See also |
None |
描述
在底图工作台工具中,您可以通过指针单击3D视图来拾取图形中的点、距离、半径与角度。
选择更加精确点的另一种方式是借助捕捉(snapping)功能。所谓捕捉,意即将您设置的下一个点“黏”在某个已存在的点或另一对象的某部分上。
捕捉功能可用于底图工作台与建筑工作台(Arch Workbench)中的大多工具,利用捕捉工具栏中的File:Snap Lock.svg Draft ToggleSnap按钮即可对此功能进行全局开启或关闭。而通过View → Toolbars → Draft Snap菜单便可以激活捕捉工具栏。通过点选捕捉工具栏中的各按钮,即可开启或关闭对应的捕捉方法。
利用捕捉功能,令所绘线段垂直于另一线段
Draft Snap toolbar
- File:Draft ToggleSnap.svg Toggle snap: toggles object snapping globally on or off.
- File:Snap Endpoint.svg Endpoint: snaps to the endpoints of line, arc and spline segments.
- File:Snap Midpoint.svg Midpoint: snaps to the middle point of line and arc segments.
- File:Snap Center.svg Center: snaps to the center point of arcs and circles.
- File:Snap Angle.svg Angle: snaps to the special cardinal points of circles and arcs, at multiples of 30° and 45°.
- File:Snap Intersection.svg Intersection: snaps to the intersection of two line or arc segments. Hover the mouse over the two desired objects to activate their intersection snaps.
- File:Snap Perpendicular.svg Perpendicular: on line and arc segments, snaps perpendicularly to the latest point.
- File:Snap Extension.svg Extension: snaps on an imaginary line that extends beyond the endpoints of line segments. Hover the mouse over the desired object to activate its extension snap.
- File:Snap Parallel.svg Parallel: snaps on an imaginary line parallel to a line segment. Hover the mouse over the desired object to activate its parallel snap.
- File:Snap Special.svg Special: snaps on special points defined by the object. introduced in version 0.17
- File:Snap Near.svg Near: snaps to the closest point or edge on the nearest object.
- File:Snap Ortho.svg Ortho: snaps on imaginary lines that cross the last point, and extend at 0°, 45° and 90°.
- File:Snap Grid.svg Grid: snaps to the intersections of the grid lines, if the grid is visible.
- File:Snap WorkingPlane.svg Working plane: always places the snapped point on the current working plane, even if you snap to a point outside that working plane.
- File:Snap Dimensions.svg Dimensions: shows temporary X and Y dimensions while snapping.
Toggle grid: toggles the visibility of the grid on or off.
Advanced snapping
- Additional snap locations can be obtained by combining two snapping methods, such as Draft Ortho and Draft Extension, that will give you a snap point at the intersection of their imaginary lines.
- Other snap locations can be obtained by using Draft Constrains, that is, by holding Shift or pressing X, Y or Z while drawing.
- Press Q while drawing to insert a "hold point" at the current location of the cursor. You will then be able to snap orthogonally to these hold points, and at the intersections of their orthogonal axes. If Draft Midpoint snapping is enabled, you will also be able to snap at the mid distance between any two hold points. introduced in version 0.17
Preferences
- The maximum distance at which a point is considered a snapping point can be changed on-the-fly by pressing [ (increase) or ] (decrease) keys. This setting is stored: Tools → Edit parameters... → BaseApp → Preferences → Mod → Draft → snapRange.
- The mentioned keys can be customized in the Draft Preferences: Edit → Preferences... → Draft → User interface settings → In-Command Shortcuts.
Notes
同时采用多种捕捉方法,可能会便于您将对象绘制在预期位置上。但如果您的鼠标指针频繁被导向在一个错误的点上,那也许就是采用多种捕捉方法所带来的副作用,此时,请尝试仅采用一种捕捉方法。
- 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
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