Draft Snap: Difference between revisions

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Snapping means "gluing" your next 3d point onto an existing point.
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[[Image:Draft_Snap_example.jpg]]
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Snapping in the Draft module has two modes: an active mode and a passive mode.
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== Description == <!--T:6-->
===Passive mode===
You are automatically set in passive mode while drawing.
In passive mode, if your mouse cursor hovers over an existing object, your point will be snapped to the nearest point on the object. An open circle symbol appears.


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===Active mode===
In the [[Image:Workbench_Draft.svg|24px]] [[Draft_Workbench|Draft Workbench]] and the [[Image:Workbench_Arch.svg|24px]] [[Arch_Workbench|Arch Workbench]] you can create geometry by picking points in the [[3D_view|3D view]] or by entering coordinates in the [[Task_panel|task panel]] of commands. Another way of selecting points is by snapping. Snapping allows to select exact geometric points on, or defined by, existing objects or the grid. You can for example snap to the endpoint of a line, to the center of a circle, or to the intersection of two edges.
To switch to active mode, press {{KEY|CTRL}} while drawing.
In active mode, either a closed circle or an open or closed square, depending on the snap type, will appear.
In all tools that support snapping, following snap locations are available:
* Endpoint of lines/polylines
* Midpoint of lines/polylines
* Center of circles and arcs
* Quadrant points of circles and arcs
* Endpoints of arcs
* Vertically or horizontally aligned points on lines/polylines, if constraining ({{KEY|SHIFT}})
* Intersection between segments
In tools that support both snapping and constraining, the combination of both behaviours ({{KEY|SHIFT}}+{{KEY|CTRL}}) can extend much the snapping possibilities.


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[[Category:User Documentation]]
Snapping is available with most [[Draft_Workbench|Draft]] and [[Arch_Workbench|Arch]] commands.


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{{languages | {{se|Draft Snap/se}} }}
[[Image:Draft_Snap_Endpoint_example.png]]
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{{Caption|Snapping to the endpoint of an edge}}

== Snap tools == <!--T:22-->

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These tools are available in the Draft snap toolbar and in the [[Draft_snap_widget|Draft snap widget]].

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Note that circular edges do not have to be full circles.

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* [[Image:Draft_Snap_Lock.svg|32px]] [[Draft_Snap_Lock|Snap lock]]: enables or disables snapping globally.

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* [[Image:Draft_Snap_Endpoint.svg|32px]] [[Draft_Snap_Endpoint|Snap endpoint]]: snaps to the endpoints of edges.

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* [[Image:Draft_Snap_Midpoint.svg|32px]] [[Draft_Snap_Midpoint|Snap midpoint]]: snaps to the midpoint of edges.

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* [[Image:Draft_Snap_Center.svg|32px]] [[Draft_Snap_Center|Snap center]]: snaps to the center point of faces and circular edges, and to the {{PropertyData|Placement}} point of [[Draft_WorkingPlaneProxy|Draft WorkingPlaneProxies]] and [[Arch_BuildingPart|Arch BuildingParts]].

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* [[Image:Draft_Snap_Angle.svg|32px]] [[Draft_Snap_Angle|Snap angle]]: snaps to the special cardinal points on circular edges, at multiples of 30° and 45°.

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* [[Image:Draft_Snap_Intersection.svg|32px]] [[Draft_Snap_Intersection|Snap intersection]]: snaps to the intersection of two edges.

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* [[Image:Draft_Snap_Perpendicular.svg|32px]] [[Draft_Snap_Perpendicular|Snap perpendicular]]: snaps to the perpendicular points on faces ({{Version|0.21}}) and edges.

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* [[Image:Draft_Snap_Extension.svg|32px]] [[Draft_Snap_Extension|Snap extension]]: snaps to an imaginary line that extends beyond the endpoints of straight edges.

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* [[Image:Draft_Snap_Parallel.svg|32px]] [[Draft_Snap_Parallel|Snap parallel]]: snaps to an imaginary line parallel to straight edges.

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* [[Image:Draft_Snap_Special.svg|32px]] [[Draft_Snap_Special|Snap special]]: snaps to special points defined by the object.

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* [[Image:Draft_Snap_Near.svg|32px]] [[Draft_Snap_Near|Snap near]]: snaps to the nearest point on faces and edges.

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* [[Image:Draft_Snap_Ortho.svg|32px]] [[Draft_Snap_Ortho|Snap ortho]]: snaps to imaginary lines that cross the previous point at multiples of 45°.

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* [[Image:Draft_Snap_Grid.svg|32px]] [[Draft_Snap_Grid|Snap grid]]: snaps to the intersections of grid lines.

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* [[Image:Draft_Snap_WorkingPlane.svg|32px]] [[Draft_Snap_WorkingPlane|Snap working plane]]: projects snap points onto the current [[Draft_SelectPlane|working plane]].

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* [[Image:Draft_Snap_Dimensions.svg|32px]] [[Draft_Snap_Dimensions|Snap dimensions]]: shows temporary X and Y dimensions.

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* [[Image:Draft_ToggleGrid.svg|32px]] [[Draft_ToggleGrid|Toggle grid]]: changes the visibility of the grid.

== Advanced snapping == <!--T:11-->

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* Additional snap points can be obtained by combining two snap options. For example combining [[Draft_Snap_Ortho|Draft Snap Ortho]] and [[Draft_Snap_Extension|Draft Snap Extension]] will give you a snap point at the intersection of their imaginary lines.
* Snapping can be combined with [[Draft_Constrain|constraining]].
* Press {{KEY|Q}} to insert a "hold point" at the current location of the cursor. You can snap to the orthogonal axes of hold points, and to the intersections of these axes. If the [[Draft_Snap_Midpoint|Draft Snap Midpoint]] option is active, you can also snap to the midpoint between two hold points.
* Press {{KEY|`}} one or more times to snap to an object that is obscured by other geometry. This is called "snap cycling". Note that you must move the cursor by a small amount in the [[3D_view|3D view]] after pressing the key.

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[[Image:Draft_Snap_example_cycling_1.png]]
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{{Caption|Snap cycling 1: The red rectangle was created first therefore it has snap priority. Without snap cycling you cannot snap to the green rectangle where it is overlapped by the red rectangle.}}

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[[Image:Draft_Snap_example_cycling_2.png]]
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{{Caption|Snap cycling 2: After using the snap cycle key once the green rectangle receives snap priority. Snapping to the midpoint of the overlapped green edge is now possible.}}

== Notes == <!--T:21-->

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* Multiple snap options can be active at the same time, but it is advisable to only activate the snap options you really need. Activating too many can slow things down.
* It is not a good idea to have [[Draft_Snap_Near|Draft Snap Near]] permanently active as it takes precedence over many other snap options.

== Preferences == <!--T:18-->

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See also: [[Preferences_Editor|Preferences Editor]] and [[Draft_Preferences|Draft Preferences]].

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* When a [[Draft_Workbench|Draft]] or [[Arch_Workbench|Arch]] command requiring point input is active, the maximum distance at which [[Draft_Snap_Grid|Draft Snap Grid]] detects the intersections of grid lines can be changed on-the-fly by pressing {{KEY|P}} (increase key) or {{KEY|M}} (decrease key). This setting is stored: {{MenuCommand|Tools → Edit parameters... → BaseApp → Preferences → Mod → Draft → snapRange}}. It can also be changed in the task panel of the [[Draft_SelectPlane|Draft SelectPlane]] command.
* To only snap when the {{MenuCommand|Snap modifier}} key is held down:
** Deselect: {{MenuCommand|Edit → Preferences... → Draft → Grid and snapping → Always snap}}.
** The default {{MenuCommand|Snap modifier}} key, {{KEY|Ctrl}}, can be changed: {{MenuCommand|Edit → Preferences... → Draft → Grid and snapping → Snap modifier}}.
* To only show the Draft snap toolbar when a command is active select: {{MenuCommand|Edit → Preferences... → Draft → Interface → Only show the Draft snap toolbar during commands}}. {{Version|1.0}}
* The snap symbols can be changed: {{MenuCommand|Edit → Preferences... → Draft → Grid and snapping → Snap symbol style}}.
* The color of the snap symbols and the dimensions of [[Draft_Snap_Dimensions|Draft Snap Dimensions]] can be changed: {{MenuCommand|Edit → Preferences... → Draft → Grid and snapping → Snap symbol color}}.
* The size of the snap symbols depends on: {{MenuCommand|Edit → Preferences... → Display → 3D View → Marker size}}. {{Version|1.0}}
* The mentioned single character keyboard shortcuts can be changed: {{MenuCommand|Edit → Preferences... → Draft → Interface → In-command shortcuts}}.


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Latest revision as of 09:20, 21 April 2024

Description

In the Draft Workbench and the Arch Workbench you can create geometry by picking points in the 3D view or by entering coordinates in the task panel of commands. Another way of selecting points is by snapping. Snapping allows to select exact geometric points on, or defined by, existing objects or the grid. You can for example snap to the endpoint of a line, to the center of a circle, or to the intersection of two edges.

Snapping is available with most Draft and Arch commands.

Snapping to the endpoint of an edge

Snap tools

These tools are available in the Draft snap toolbar and in the Draft snap widget.

Note that circular edges do not have to be full circles.

  • Snap lock: enables or disables snapping globally.
  • Snap angle: snaps to the special cardinal points on circular edges, at multiples of 30° and 45°.
  • Snap extension: snaps to an imaginary line that extends beyond the endpoints of straight edges.
  • Snap parallel: snaps to an imaginary line parallel to straight edges.
  • Snap special: snaps to special points defined by the object.
  • Snap near: snaps to the nearest point on faces and edges.
  • Snap ortho: snaps to imaginary lines that cross the previous point at multiples of 45°.
  • Snap grid: snaps to the intersections of grid lines.

Advanced snapping

  • Additional snap points can be obtained by combining two snap options. For example combining Draft Snap Ortho and Draft Snap Extension will give you a snap point at the intersection of their imaginary lines.
  • Snapping can be combined with constraining.
  • Press Q to insert a "hold point" at the current location of the cursor. You can snap to the orthogonal axes of hold points, and to the intersections of these axes. If the Draft Snap Midpoint option is active, you can also snap to the midpoint between two hold points.
  • Press ` one or more times to snap to an object that is obscured by other geometry. This is called "snap cycling". Note that you must move the cursor by a small amount in the 3D view after pressing the key.

Snap cycling 1: The red rectangle was created first therefore it has snap priority. Without snap cycling you cannot snap to the green rectangle where it is overlapped by the red rectangle.

Snap cycling 2: After using the snap cycle key once the green rectangle receives snap priority. Snapping to the midpoint of the overlapped green edge is now possible.

Notes

  • Multiple snap options can be active at the same time, but it is advisable to only activate the snap options you really need. Activating too many can slow things down.
  • It is not a good idea to have Draft Snap Near permanently active as it takes precedence over many other snap options.

Preferences

See also: Preferences Editor and Draft Preferences.

  • When a Draft or Arch command requiring point input is active, the maximum distance at which Draft Snap Grid detects the intersections of grid lines can be changed on-the-fly by pressing P (increase key) or M (decrease key). This setting is stored: Tools → Edit parameters... → BaseApp → Preferences → Mod → Draft → snapRange. It can also be changed in the task panel of the Draft SelectPlane command.
  • To only snap when the Snap modifier key is held down:
    • Deselect: Edit → Preferences... → Draft → Grid and snapping → Always snap.
    • The default Snap modifier key, Ctrl, can be changed: Edit → Preferences... → Draft → Grid and snapping → Snap modifier.
  • To only show the Draft snap toolbar when a command is active select: Edit → Preferences... → Draft → Interface → Only show the Draft snap toolbar during commands. introduced in version 1.0
  • The snap symbols can be changed: Edit → Preferences... → Draft → Grid and snapping → Snap symbol style.
  • The color of the snap symbols and the dimensions of Draft Snap Dimensions can be changed: Edit → Preferences... → Draft → Grid and snapping → Snap symbol color.
  • The size of the snap symbols depends on: Edit → Preferences... → Display → 3D View → Marker size. introduced in version 1.0
  • The mentioned single character keyboard shortcuts can be changed: Edit → Preferences... → Draft → Interface → In-command shortcuts.