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[[Image:Workbench_Surface.svg|64px]]
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The '''Surface''' workbench provides tools to create and modify surfaces. It has a very similar functionality as [[Part_Shapebuilder|Part Shape builder]] ''Face from edges'', but it is parametric and provides additional options. Its features are:
* Create surfaces from boundary edges
* Align the curvature from neighbor faces
* constrain surfaces to additional curves or vertexes.
* extend faces (need to find out how!)
* A mesh can be used as a template to create spline curves on its surface.


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{{Version|0.17}}
{{Docnav/ru
|[[Start_Workbench/ru|Верстак Start]]
|[[TechDraw_Workbench/ru|Верстак TechDraw]]
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[[Image:Workbench_Surface.svg|thumb|128px|Логотип верстака Surface]]
== Introduction ==


{{TOCright}}


<span id="Introduction"></span>
The aim of the surface workbench is to create faces with shapes, which are not available with the standard tools in the other workbenches. The Open Cascade CAD-kernel gives as example a rounded corner of a rectangular box with different radii at the edges. Another example is shown here. It is the form of a plastic toy, created with the surface workbench.
== Введение ==


[[Image:Workbench_Surface.svg|24px]] [[Surface_Workbench/ru|Верстак Surface]] предоставляет инструменты для создания и изменения простых [https://ru.wikipedia.org/wiki/NURBS поверхностей NURBS]. Эти инструменты имеют функциональность, похожую на инструменты {{Button|[[File:Part Builder.svg|16px]] [[Part_Builder/ru|Part Builder]]}} при использовании опции {{MenuCommand|Face from edges}}. Однако, в отличие от этих инструментов, Верстак Surface параметрический и даёт дополнительные опции. В этом отношении, инструменты этого верстака похожи на {{Button|[[File:PartDesign_AdditiveLoft.svg|16px]] [[PartDesign_AdditiveLoft/ru|PartDesign AdditiveLoft]]}} и {{Button|[[File:PartDesign_AdditivePipe.svg|16px]] [[PartDesign_AdditivePipe/ru|PartDesign AdditivePipe]]}}.
[[File:Toy_Duck.png|200px]]
The surface workbench generates usually nurb surfaces. The uses does not need to know much about nurbs(correct?). It is sufficient to have a closed border for a face, in order to create the surface. Options are available to further modify its shape.


Некоторые из предоставляемых функций:
The Surface workbench integrates with other workbenches of FreeCAD. The above example was created from [[Sketcher Workbench| sketches]] placed on [[PartDesign Plane| datum planes]] in the [[PartDesign_Workbench| PartDesign workbench]]. The design can be fully parametric, when all datum planes and sketches are defined accordingly.
* Создание поверхностей из граничных ребер.
* Выравнивание кривизны от соседних граней.
* Ограничение поверхностей дополнительными кривыми и вершинами.
* Расширение лица.
* Можно использовать сетку в качестве шаблона для создания сплайновых кривых на ее поверхности.


[[Image:Surface_example.png|350px]]
The current state of FreeCAD (v0.17) does not allow to place the surfaces into a body of the PartDesign workbench. But the surfaces can be placed inside of a [[Std_Part|Part]] together with the body which holds all datum planes and sketches. The non parametric [[Part_Shapebuilder|Part Shape builder]] must still be used in order to create a [[Glossary#Shell|shell]] and a regular [[Glossary#Solid|solid]] out of the set of surfaces.


<span id="Usage"></span>
== Surface Tools ==
== Применение ==


Верстак Surface предназначен для создания граней с формами, что невозможно сделать стандартными инструментами в других верстаках.
* [[File:Filling.svg|32px]] [[Surface_Filling|Filling...]]: fills a series of boundary curves with a surface. The surface can be modified by adding constraint curves and vertexes. The surface changes its shape so that the surface goes through the added constraint elements.
* [[File:BSplineSurf.svg|32px]] [[Surface_GeomFillSurface|Fill boundary curves]]: creates a surface from two, three or four boundary edges. Three different filling modes are available: Stretch, Coons, Curved.


[[File:Toy_Duck.png|350px]]
== Additional Menu Tools ==


{{Caption|Surface created with sketches placed in datum planes with the tools of the [[PartDesign Workbench|PartDesign Workbench]]}}
These tools are only found in the Surface menu.
* [[Surface_CurveOnMesh|Curve on mesh...]]: A selected mesh from the mesh workbench can serve as a template in order to create manually spline curves on it.
* [[Surface_ExtendFace|Extend face]]: Extrapolate the surface at the boundaries with its local u-parameter and v-parameter.


The Surface Workbench integrates with other workbenches of FreeCAD. The above example was created from {{Button|[[File:Sketcher_NewSketch.svg|16px]] [[Sketch|Sketches]]}} placed on {{Button|[[File:PartDesign_Plane.svg|16px]] [[PartDesign_Plane|PartDesign Datum planes]]}} in the [[File:Workbench_PartDesign.svg|24px]] [[PartDesign_Workbench|PartDesign Workbench]]. The design can be fully parametric if all datum planes and sketches are defined accordingly. In most cases it is sufficient to draw a closed sketch to define the boundary of a face, and then use different options to further modify its shape.
==How to use==


The generated surface cannot be placed inside a {{Button|[[File:PartDesign_Body.svg|16px]] [[PartDesign_Body|PartDesign Body]]}}. However, the generated surface can be contained inside a {{Button|[[File:Std_Part.svg|16px]] [[Std_Part|Std Part]]}} together with the associated {{Button|[[File:PartDesign_Body.svg|16px]] [[PartDesign_Body|PartDesign Body]]}} that holds the datum planes and sketches. The non-parametric {{Button|[[File:Part_Builder.svg|16px]] [[Part_Builder|Part Builder]]}} tool can then be used in order to create a [[Glossary#Shell|shell]] and finally a [[Glossary#Solid|solid]].


<span id="Tools"></span>
== Инструменты ==


* [[File:Surface_Filling.svg|32px|link=Surface_Filling]] [[Surface_Filling|Filling]]: fills a series of boundary curves with a surface.
== Limitations ==


* [[File:Surface_GeomFillSurface.svg|32px|link=Surface_GeomFillSurface]] [[Surface_GeomFillSurface|Fill boundary curves]]: creates a surface from two, three or four boundary edges.
The used surface code from the CAD-kernel OCCT is very fragile and can not handle wrong input properly. This can cause FreeCAD to crash. The following situations cause problems and may crash FreeCAD:
* adding additional edges or wires as boundary to a surface, that would make up several faces. Add those edges only to '''Unbound Edges'''.
* Using of boundary edges, that fails do build a closed boundary at parametric changes of the document.


* [[File:Surface_Sections.svg|32px|link=Surface_Sections]] [[Surface_Sections|Sections]]: creates a surface from edges that represent transversal sections of surface.
{{Docnav|Start_Workbench|TechDraw_Module}}
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* [[File:Surface_ExtendFace.svg|32px|link=Surface_ExtendFace]] [[Surface_ExtendFace|Extend face]]: extrapolates the surface at the boundaries with its local U parameter and V parameter.
[[Category:User Documentation]]


* [[File:Surface_CurveOnMesh.svg|32px|link=Surface_CurveOnMesh]] [[Surface_CurveOnMesh|Curve on mesh]]: creates approximated spline segments on top of a selected [[Mesh_Workbench|mesh]].
{{clear}}

* [[File:Surface_BlendCurve.svg|32px|link=Surface_BlendCurve]] [[Surface_BlendCurve|Blend Curve]]: creates a Bezier curve between two edges, with desired continuity.


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{{Docnav/ru
|[[Start_Workbench/ru|Верстак Start]]
|[[TechDraw_Workbench/ru|Верстак TechDraw]]
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|IconR=Workbench_TechDraw.svg
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{{Surface Tools navi{{#translation:}}}}
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[[Category:Workbenches{{#translation:}}]]

Latest revision as of 18:46, 25 April 2024

Логотип верстака Surface

Введение

Верстак Surface предоставляет инструменты для создания и изменения простых поверхностей NURBS. Эти инструменты имеют функциональность, похожую на инструменты Part Builder при использовании опции Face from edges. Однако, в отличие от этих инструментов, Верстак Surface параметрический и даёт дополнительные опции. В этом отношении, инструменты этого верстака похожи на PartDesign AdditiveLoft и PartDesign AdditivePipe.

Некоторые из предоставляемых функций:

  • Создание поверхностей из граничных ребер.
  • Выравнивание кривизны от соседних граней.
  • Ограничение поверхностей дополнительными кривыми и вершинами.
  • Расширение лица.
  • Можно использовать сетку в качестве шаблона для создания сплайновых кривых на ее поверхности.

Применение

Верстак Surface предназначен для создания граней с формами, что невозможно сделать стандартными инструментами в других верстаках.

Surface created with sketches placed in datum planes with the tools of the PartDesign Workbench

The Surface Workbench integrates with other workbenches of FreeCAD. The above example was created from Sketches placed on PartDesign Datum planes in the PartDesign Workbench. The design can be fully parametric if all datum planes and sketches are defined accordingly. In most cases it is sufficient to draw a closed sketch to define the boundary of a face, and then use different options to further modify its shape.

The generated surface cannot be placed inside a PartDesign Body. However, the generated surface can be contained inside a Std Part together with the associated PartDesign Body that holds the datum planes and sketches. The non-parametric Part Builder tool can then be used in order to create a shell and finally a solid.

Инструменты

  • Filling: fills a series of boundary curves with a surface.
  • Sections: creates a surface from edges that represent transversal sections of surface.
  • Extend face: extrapolates the surface at the boundaries with its local U parameter and V parameter.
  • Blend Curve: creates a Bezier curve between two edges, with desired continuity.