Sketcher ConstrainBlock: Difference between revisions

Latest revision as of 07:52, 19 April 2024

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This documentation is a work in progress. Please don't mark it as translatable since it will change in the next hours and days.

Symmetric

Dimension

Sketcher

Menu location
Sketcher ConstrainBlock
Sketch → Sketcher constraints → Constrain block
Workbenches
Sketcher
Default shortcut
K B
Introduced in version
0.17
See also
Sketcher ConstrainLock

Description

The Sketcher ConstrainBlock tool blocks edges in place with a single constraint. It is mainly intended for B-splines, which can be difficult to fully constrain otherwise.

The block constraint only affects the freely movable parts of an edge. Blocked edges can have other constraints, and applying addition constraints to a blocked edge can modify it.

Usage

Continue mode

Make sure there is no selection.
There are several ways to invoke the tool:
- Press the Constrain block button.
- Select the Sketch → Sketcher constraints → Constrain block option from the menu.
- introduced in version 0.22: Right-click in the 3D view and select the Constrain → Constrain block option from the context menu.
- Use the keyboard shortcut: K then B.
The cursor changes to a cross with the tool icon.
Select a single edge.
A constraint is added.
Optionally keep creating constraints.
To finish, right-click or press Esc, or start another geometry or constraint creation tool.

Run-once mode

Select one or more edges.
Invoke the tool as explained above, or with the following additional option:
- introduced in version 0.22: Right-click in the 3D view and select the Constrain block option from the context menu.
Depending on the selection one or more constraints are added.

Scripting

Sketch.addConstraint(Sketcher.Constraint('Block', Edge))

The Sketcher scripting page explains the values which can be used for Edge and contains further examples on how to create constraints from Python scripts.

Symmetric

Dimension

Sketcher

General: Create sketch, Edit sketch, Map sketch to face, Reorient sketch, Validate sketch, Merge sketches, Mirror sketch, Leave sketch, View sketch, View section, Toggle grid, Toggle snap, Configure rendering order, Stop operation

Sketcher geometries: Point, Line, Arc, Arc by 3 points, Circle, Circle by 3 points, Ellipse, Ellipse by 3 points, Arc of ellipse, Arc of hyperbola, Arc of parabola, B-spline by control points, Periodic B-spline by control points, B-spline by knots, Periodic B-spline by knots, Polyline, Rectangle, Centered rectangle, Rounded rectangle, Triangle, Square, Pentagon, Hexagon, Heptagon, Octagon, Regular polygon, Slot, Fillet, Corner-preserving fillet, Trim, Extend, Split, External geometry, Carbon copy, Toggle construction geometry

Sketcher constraints:
- Geometric constraints: Coincident, Point on object, Vertical, Horizontal, Parallel, Perpendicular, Tangent, Equal, Symmetric, Block
- Dimensional constraints: Lock, Horizontal distance, Vertical distance, Distance, Radius or weight, Diameter, Auto radius/diameter, Angle, Refraction (Snell's law)
- Constraint tools: Toggle driving/reference constraint, Activate/deactivate constraint

Sketcher tools: Select unconstrained DoF, Select associated constraints, Select associated geometry, Select redundant constraints, Select conflicting constraints, Show/hide internal geometry, Select origin, Select horizontal axis, Select vertical axis, Symmetry, Clone, Copy, Move, Rectangular array, Remove axes alignment, Delete all geometry, Delete all constraints

Sketcher B-spline tools: Show/hide B-spline degree, Show/hide B-spline control polygon, Show/hide B-spline curvature comb, Show/hide B-spline knot multiplicity, Show/hide B-spline control point weight, Convert geometry to B-spline, Increase B-spline degree, Decrease B-spline degree, Increase knot multiplicity, Decrease knot multiplicity, Insert knot, Join curves

Sketcher virtual space: Switch virtual space

Additional: Sketcher Dialog, Preferences, Sketcher scripting

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, Arch, Assembly, CAM, Draft, FEM, Inspection, Mesh, OpenSCAD, Part, PartDesign, Points, Reverse Engineering, Robot, Sketcher, Spreadsheet, Start, Surface, TechDraw, Test Framework, Web

Addons: Addon Manager, External workbenches, Scripting and macros

Hubs: User hub, Power users hub, Developer hub

@@ Line 1: / Line 1: @@
 <languages/>
+{{Page_in_progress}}
 <translate>
 <!--T:8-->
 {{Docnav
 |[[Sketcher_ConstrainSymmetric|Symmetric]]
+|[[Sketcher_Dimension|Dimension]]
-|[[Sketcher_ConstrainLock|Lock]]
 |[[Sketcher_Workbench|Sketcher]]
 |IconL=Constraint_Symmetric.svg
-|IconR=Sketcher_ConstrainLock.svg‎
+|IconR=Sketcher_Dimension.svg‎
 |IconC=Workbench_Sketcher.svg
 }}
@@ Line 14: / Line 16: @@
 {{GuiCommand
 |Name=Sketcher ConstrainBlock
-|MenuLocation=Sketch → Sketcher constraints → Constrain Block
+|MenuLocation=Sketch → Sketcher constraints → Constrain block
 |Workbenches=[[Sketcher_Workbench|Sketcher]]
+|Shortcut={{KEY|K}} {{KEY|B}}
 |Version=0.17
-|SeeAlso=[[Sketcher_ConstrainLock|Sketcher Constrain Lock]]
+|SeeAlso=[[Sketcher_ConstrainLock|Sketcher ConstrainLock]]
 }}
@@ Line 23: / Line 26: @@
 <!--T:3-->
+The [[Image:Sketcher_ConstrainBlock.svg|24px]] [[Sketcher_ConstrainBlock|Sketcher ConstrainBlock]] tool blocks edges in place with a single constraint. It is mainly intended for [[Sketcher_CreateBSpline|B-splines]], which can be difficult to fully constrain otherwise.
-'''Constrain Block''' blocks a geometric element in place with a single constraint.
+The block constraint only affects the freely movable parts of an edge. Blocked edges can have other constraints, and applying addition constraints to a blocked edge can modify it.
-<!--T:12-->
-It is mainly intended to be used with {{Button|[[File:Sketcher_CreateBSpline.svg|16px]] [[Sketcher_CreateBSpline|B-Splines]]}}, which can be difficult to fully constrain otherwise.
 ==Usage== <!--T:5-->
+See also: [[Sketcher_Workbench#Drawing_aids|Drawing aids]].
+===[[Sketcher_Workbench#Continue_modes|Continue mode]]===
 <!--T:6-->
+# Make sure there is no selection.
-# Select an element to constrain.
+# There are several ways to invoke the tool:
-# Press the {{Button|[[File:Sketcher_ConstrainBlock.svg|16px]] [[Sketcher_ConstrainBlock|Constrain Block]]}} button.
+#* Press the {{Button|[[Image:Sketcher_ConstrainBlock.svg|16px]] [[Sketcher_ConstrainBlock|Constrain block]]}} button.
+#* Select the {{MenuCommand|Sketch → Sketcher constraints → [[Image:Sketcher_ConstrainBlock.svg|16px]] Constrain block}} option from the menu.
+#* {{Version|0.22}}: Right-click in the [[3D_view|3D view]] and select the {{MenuCommand|Constrain → [[Image:Sketcher_ConstrainBlock.svg|16px]] Constrain block}} option from the context menu.
+#* Use the keyboard shortcut: {{KEY|K}} then {{KEY|B}}.
+# The cursor changes to a cross with the tool icon.
+# Select a single edge.
+# A constraint is added.
+# Optionally keep creating constraints.
+# To finish, right-click or press {{KEY|Esc}}, or start another geometry or constraint creation tool.
+===Run-once mode===
+# Select one or more edges.
-<!--T:13-->
+# Invoke the tool as explained above, or with the following additional option:
-Or press the button first, and then select the elements.
+#* {{Version|0.22}}: Right-click in the [[3D_view|3D view]] and select the {{MenuCommand|[[Image:Sketcher_ConstrainBlock.svg|16px]] Constrain block}} option from the context menu.
+# Depending on the selection one or more constraints are added.
-== Scripting ==
+== Scripting == <!--T:14-->
 </translate>
@@ Line 43: / Line 62: @@
 <translate>
+<!--T:15-->
-The [[Scripting Sketcher constraints in Python]] page explains the values which can be used for {{incode|Edge}} and contains further examples on how to create constraints from Python scripts.
+The [[Sketcher_scripting|Sketcher scripting]] page explains the values which can be used for {{incode|Edge}} and contains further examples on how to create constraints from Python scripts.
@@ Line 49: / Line 69: @@
 {{Docnav
 |[[Sketcher_ConstrainSymmetric|Symmetric]]
+|[[Sketcher_Dimension|Dimension]]
-|[[Sketcher_ConstrainLock|Lock]]
 |[[Sketcher_Workbench|Sketcher]]
 |IconL=Constraint_Symmetric.svg
-|IconR=Sketcher_ConstrainLock.svg‎
+|IconR=Sketcher_Dimension.svg‎
 |IconC=Workbench_Sketcher.svg
 }}
 </translate>
-{{Sketcher Tools navi{{#translation:}}}}
+{{Sketcher_Tools_navi{{#translation:}}}}
 {{Userdocnavi{{#translation:}}}}
-{{clear}}