Sketcher ValidateSketch
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Sketcher ValidateSketch |
| Veja também |
|---|
| Sketch / Part Design → Validate sketch |
| Bancadas de trabalho |
| Sketcher, PartDesign |
| Atalho padrão |
| Nenhum |
| Introduzido na versão |
| - |
| Veja também |
| Nenhum |
Descrição
The Validate sketch utility can be used to analyze and repair a sketch that is no longer editable or has invalid constraints, or to add missing coincident constraints to a sketch created from imported geometry such as DXF files. It can also be useful to locate a missing coincidence in a native sketch that generates a "can't validate broken face" error when trying to apply a PartDesign feature.
The Sketcher validation task panel
Usage
- This tool cannot be used on a sketch that is in edit mode. If required exit edit mode by doing one of the following:
- Press the
Leave sketch button. - Press the Close button at the top of the Task panel.
- Use the keyboard shortcut: Esc (if enabled in the Sketcher Preferences).
- Press the
- Select the sketch to be validated from the Tree view or by clicking on one of its edges in the 3D view.
- To open the validate sketch utility do one of the following:
- Select the Sketch → Validate sketch... option from the menu.
- Press the
Validate sketch button (not available in the PartDesign Workbench).
- See Options below for the available operations.
- Press the Close button when done.
Options
Missing coincidences
Finds out missing coincidences for overlapping vertices, and adds them. Press the Find button; a pop up dialog will appear to report how many missing coincidences were found; they will be shown in the 3D view as yellow crosses. Press OK to close the dialog, then press the Fix button to add the missing coincidences.
If necessary, define a larger tolerance value in the drop-down field.
Press Highlight open vertexes to highlight vertexes that are outside this tolerance.
This tolerance is also used by the Find/Fix process.
Leave the "Ignore construction geometry" checkbox checked to disregard construction geometry in the analysis.
Invalid constraints
Checks for malformed constraints.
For example, if there is a Circle-Line-Tangent constraint, but it references two lines, it is considered invalid.
(This sometimes happens due to the Topological naming problem, i.e. the external geometry changes type).
It also does other checks, such as for empty links.
Degenerated geometry
Degenerated geometry can result from solver actions in a sketch.
For instance, if a line is forced to shorten to become almost a point.
Other examples: a zero length line or zero radius circle/arc.
Reversed external geometry
Reversed external geometry can happen because the handling of reversed geometry was changed around revision 0.15.
This process might be helpful if sketches with external-geometry fail to solve because of these changes.
Constraint orientation locking
Tangent and perpendicular constraints are implemented (via-point).
Internally they work by constraining the angle between tangent vectors. With tangent constraint for example, the angle can be 0 or 180 degrees (co-directed or opposed vectors). The actual angle is remembered in the constraint data ("constraint orientation is locked"), it guards against flipping. But the angle can be erased ("constraint orientation unlock") or updated; these tools do exactly that.
The locking mechanism typically works well and this tool should not be needed. It should only used after making a backup of the open document.
- The tools: New sketch, Edit sketch, Leave sketch, View sketch, View section, Map sketch to face, Reorient sketch, Validate sketch, Merge sketches, Mirror sketch
- Sketcher geometries: Point, Line by 2 point, Create an arc, Arc, Arc by 3 Point, Create a circle, Circle, Circle by 3 Point, Create a conic, Ellipse by center, Ellipse by 3 points, Arc of ellipse, Arc of hyperbola, Arc of parabola, Create a B-spline, Create B-spline, Create periodic B-pline, Polyline (multiple-point line), Rectangle, Create regular polygon, Triangle, Square, Pentagon, Hexagon, Heptagon, Octagon, Create Regular Polygon, Slot, Fillet, Trimming, Extend, External Geometry, CarbonCopy, Construction Mode
- Sketcher constraints
- Geometric constraints Coincident, Point On Object, Vertical, Horizontal, Parallel, Perpendicular, Tangent, Equal Length, Symmetric, Constrain Block
- Dimensional constraints Lock, Horizontal Distance, Vertical Distance, Distance, Radius, Internal Angle, Snell's Law, Internal Alignment, Toggle reference/driving constraint,
- Sketcher tools Select solver DOFs, Close Shape, Connect Edges, Select Constraints, Select Origin, Select Vertical Axis, Select Horizontal Axis, Select Redundant Constraints, Select Conflicting Constraints, Select Elements Associated with constraints, Show/Hide internal geometry, Symmetry, Clone, Copy, Move, Rectangular Array, 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, Convert Geometry to B-spline, Increase degree, Increase knot multiplicity, Decrease knot multiplicity
- Sketcher virtual space Switch Virtual Space
- Installation: Windows, Linux, Mac; Getting started
- Basics: About FreeCAD, Workbenches, Preferences, Document structure, Interface Customization, Properties, Mouse Model; Tutorials
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- Scripting: Introduction to Python, FreeCAD scripting tutorial, FreeCAD Scripting Basics, How to install macros, Gui Command, Units Modules: Builtin modules, Workbench creation, Installing more workbenches Meshes: Mesh Scripting, Mesh Module Parts: The Part Module, Topological data scripting, PythonOCC, Mesh to Part Coin scenegraph: The Coin/Inventor scenegraph, Pivy Qt interface: PySide, Using the FreeCAD GUI, Dialog creation Parametric objects: Scripted objects Other: Code snippets, Line drawing function, Embedding FreeCAD, FreeCAD vector math library, Power users hub, Python, Macros, FreeCAD Scripting Basics, Topological data scripting
