Mesh Workbench/cs: Difference between revisions

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[[Image:Workbench_Mesh.svg|64px]]
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[[Image:Workbench_Mesh.svg|thumb|128px|Mesh workbench icon]]

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==Introduction==


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[[Image:Mesh_example.jpg|500px]]
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* [[Image:Mesh_Import.svg|32px]] [[Mesh_Import|Import mesh...]]: Imports a mesh object from a file.
=== General tools ===
* [[Image:Mesh_ImportMesh.png|32px]] [[Mesh Import|Import Mesh]]: Import meshes in several file formats
* [[Image:Mesh_ExportMesh.png|32px]] [[Mesh Export|Export Mesh]]: Export meshes in several file formats
* [[Image:Mesh MeshFromShape.png|32px]] [[Mesh MeshFromShape|Create Mesh from shape]]: Convert [[Part Module|Part]] objects into meshes
* [[Image:Mesh_CurvaturePlot.png|32px]] [[Mesh CurvaturePlot|Curvature Plot]]: Creates a curvature plot
* [[Image:Mesh HarmonizeNormals.png|32px]] [[Mesh HarmonizeNormals|Harmonize Normals]]: Harmonize normals
* [[Image:Mesh_FlipNormals.png|32px]] [[Mesh FlipNormals|Flip Normals]]: Flip [http://en.wikipedia.org/wiki/Surface_normal normals]
* [[Mesh FillHoles|Fill Holes...]]: Fill up holes
* [[Image:Mesh_FillInteractiveHole.png|32px]] [[Mesh FillInteractiveHole|Close hole]]: Close holes in meshes
* [[Mesh AddTriangle|Add triangle]]: Add triangle
* [[Image:Mesh_RemoveComponents.png|32px]] [[Mesh RemoveComponents|Remove components...]]: Remove components of meshes
* [[Mesh RemoveCompByHand|Remove components by hand...]]: Remove components of meshes by hand
* [[Mesh CreateMeshSegment|Create mesh segments...]]: Creates mesh segments
* [[Mesh Smooth|Smooth...]]: Smooth mesh
* [[Mesh Scale|Scale]]


* [[Image:Mesh_Export.svg|32px]] [[Mesh_Export|Export mesh...]]: Exports a mesh object to a file.
=== Analyze ===
Analysis of curvature, faces, and check if a mesh can be safely converted into a solid
* [[Mesh EvaluateRepair|Evaluate & Repair mesh...]]: Evaluates and repairs meshes
* [[Image:Mesh EvaluateFacet.png|32px]] [[Mesh EvaluateFacet|Face Info]]: Gives info on faces
* [[Mesh EvaluateCurvature|Curvature Info]]: Gives info on curvature
* [[Mesh EvaluateSolid|Check solid mesh]]: Checks the solid if it can be converted to a mesh
* [[Mesh BoundingBox|Boundings info...]]: Evaluates the bounding box of a mesh


* [[Image:Mesh_FromPartShape.svg|32px]] [[Mesh_FromPartShape|Create mesh from shape...]]: Creates mesh objects from shape objects.
=== Regular solid ===
[[Image:Mesh_Regular_Solid.png|32px]] [[Mesh BuildRegularSolid|Regular solid...]] Create mesh primitives, like cubes, cylinders, cones, or spheres:
* [[Image:Mesh_Cube.png|32px]] [[Mesh_Cube|Mesh Cube]] Create a mesh cube
* [[Image:Mesh_Cylinder.png|32px]] [[Mesh_Cylinder|Mesh Cylinder]] Create a mesh cylinder
* [[Image:Mesh_Cone.png|32px]] [[Mesh_Cone|Mesh Cone]] Create a mesh cone
* [[Image:Mesh_Sphere.png|32px]] [[Mesh_Sphere|Mesh Sphere]] Create a mesh sphere
* [[Image:Mesh_Ellipsoid.png|32px]] [[Mesh_Ellipsoid|Mesh Ellipsoid]] Create a mesh ellipsoid
* [[Image:Mesh_Torus.png|32px]] [[Mesh_Torus|Mesh Torus]] Create a mesh torus


* [[Image:Mesh_RemeshGmsh.svg|32px]] [[Mesh_RemeshGmsh|Refinement...]]: Remeshes a mesh object. {{Version|0.19}}
=== Boolean ===
* [[Mesh Union|Union]]: Does a union (fusion) on meshes
* [[Mesh Intersection|Intersection]]: Does an intersection (common) on meshes
* [[Mesh Difference|Difference]]: Does a difference (cut) on meshes


* Analyze
=== Cutting ===
* [[Image:Mesh_PolyCut.png|32px]] [[Mesh_PolyCut|Mesh PolyCut]]: Cut meshes along a line
** [[Image:Mesh_Evaluation.svg|32px]] [[Mesh_Evaluation|Evaluate and repair mesh...]]: Evaluates and repairs a mesh object.
** [[Image:Mesh_EvaluateFacet.svg|32px]] [[Mesh_EvaluateFacet|Face info]]: Shows information about faces of mesh objects.
* [[Mesh TrimMesh|Trim mesh]]: Trims meshes
** [[Image:Mesh_CurvatureInfo.svg|32px]] [[Mesh_CurvatureInfo|Curvature info]]: Shows the absolute curvature of [[Mesh_VertexCurvature|curvature objects]] at selected points.
* [[Mesh TrimMeshWithPlane|Trim mesh with a plane]]: Trims meshes with a plane
** [[Image:Mesh_EvaluateSolid.svg|32px]] [[Mesh_EvaluateSolid|Check solid mesh]]: Checks if a mesh object is solid.
* Create section from mesh and plane
** [[Image:Mesh_BoundingBox.svg|32px]] [[Mesh_BoundingBox|Boundings info...]]: Shows the bounding box coordinates of a mesh object.


* [[Image:Mesh_VertexCurvature.svg|32px]] [[Mesh_VertexCurvature|Curvature plot]]: Creates Mesh Curvature objects for mesh objects.
=== Other ===
* [[Mesh Merge|Merge]]: Merges meshes
* [[Mesh SelectMesh|Select Mesh]]: Selects meshes
* [[Mesh SplitMesh|Split Mesh]]: Splits meshes
* [[Image:Mesh MakeSegment.png|32px]] [[Mesh MakeSegment|Make segment]]: Makes a segment


* [[Image:Mesh_HarmonizeNormals.svg|32px]] [[Mesh_HarmonizeNormals|Harmonize normals]]: Harmonizes the normals of mesh objects.
== Preferences ==
* [[Image:Preferences-import-export.svg|32px]] [[Import_Export_Preference|Preference]] Import-Export


* [[Image:Mesh_FlipNormals.svg|32px]] [[Mesh_FlipNormals|Flip normals]]: Flips the normals of mesh objects.
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To jsou jenom některé ze základních aktuálně dostupných operací v rozhraní modulu Síť. Ale sítě FreecADu také mohou být zpracovávány mnoha dalšími způsoby pomocí [[Mesh Scripting/cs| skriptování]].
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* [[Image:Mesh_FillupHoles.svg|32px]] [[Mesh_FillupHoles|Fill holes...]]: Fills holes in mesh objects.
Meshes can also be handled by [[Mesh Scripting]].


* [[Image:Mesh_FillInteractiveHole.svg|32px]] [[Mesh_FillInteractiveHole|Close hole]]: Fills selected holes in mesh objects.
==Links==


* [[Image:Mesh_AddFacet.svg|32px]] [[Mesh_AddFacet|Add triangle]]: Adds faces along a boundary of an open mesh object.
* [[FreeCAD and Mesh Import]]


* [[Image:Mesh_RemoveComponents.svg|32px]] [[Mesh_RemoveComponents|Remove components...]]: Removes faces from mesh objects.


* [[Image:Mesh_RemoveCompByHand.svg|32px]] [[Mesh_RemoveCompByHand|Remove components by hand...]]: Removes components from mesh objects.

* [[Image:Mesh_Segmentation.svg|32px]] [[Mesh_Segmentation|Create mesh segments...]]: Creates separate mesh segments for specified surface types of a mesh object.

* [[Image:Mesh_SegmentationBestFit.svg|32px]] [[Mesh_SegmentationBestFit|Create mesh segments from best-fit surfaces...]]: Creates separate mesh segments for specified surface types of a mesh object, and can identify their parameters.

* [[Image:Mesh_Smoothing.svg|32px]] [[Mesh_Smoothing|Smooth...]]: Smooths mesh objects.

* [[Image:Mesh_Decimating.svg|32px]] [[Mesh_Decimating|Decimation...]]: Reduces the number of faces in mesh objects. {{Version|0.19}}

* [[Image:Mesh_Scale.svg|32px]] [[Mesh_Scale|Scale...]]: Scales mesh objects.

* [[Image:Mesh_BuildRegularSolid.svg|32px]] [[Mesh_BuildRegularSolid|Regular solid...]] Creates a regular parametric solid mesh object.

* Boolean
** [[Image:Mesh_Union.svg|32px]] [[Mesh_Union|Union]]: Creates a mesh object that is the union of two mesh objects.
** [[Image:Mesh_Intersection.svg|32px]] [[Mesh_Intersection|Intersection]]: Creates a mesh object that is the intersection of two mesh objects.
** [[Image:Mesh_Difference.svg|32px]] [[Mesh_Difference|Difference]]: Creates a mesh object that is the difference of two mesh objects.

* Cutting
** [[Image:Mesh_PolyCut.svg|32px]] [[Mesh_PolyCut|Cut mesh]]: Cuts whole faces from mesh objects.
** [[Image:Mesh_PolyTrim.svg|32px]] [[Mesh_PolyTrim|Trim mesh]]: Trims faces and parts of faces from mesh objects.
** [[Image:Mesh_TrimByPlane.svg|32px]] [[Mesh_TrimByPlane|Trim mesh with a plane]]: Trims faces and parts of faces on one side of a plane from a mesh object.
** [[Image:Mesh_SectionByPlane.svg|32px]] [[Mesh_SectionByPlane|Create section from mesh and plane]]: Creates a cross section across a mesh object.
** [[Image:Mesh_CrossSections.svg|32px]] [[Mesh_CrossSections|Cross-sections...]]: Creates multiple cross sections across mesh objects. {{Version|0.19}}

* [[Image:Mesh_Merge.svg|32px]] [[Mesh_Merge|Merge]]: Creates a mesh object by combining the meshes of two or more mesh objects.

* [[Image:MeshPart_CreateFlatMesh.svg|32px]] [[MeshPart_CreateFlatMesh|Unwrap Mesh]]: Creates a flat representation of a mesh object. {{Version|0.19}}

* [[Image:MeshPart_CreateFlatFace.svg|32px]] [[MeshPart_CreateFlatFace|Unwrap Face]]: Creates a flat representation of a face of a shape object. {{Version|0.19}}

==Preferences==

There are some [[Import_Export_Preferences#Mesh_Formats|export preferences related to Mesh Formats]] but these are not used by commands belonging to this workbench. They are used by the [[Std_Export|Std Export]] command.

Mesh Workbench preferences can be found in the following categories of the [[Preferences_Editor|Preferences Editor]]:
* [[Image:Preferences-display.svg|32px]] [[Preferences_Editor#Display_settings|Display]]: On the [[Preferences_Editor#Mesh_view|Mesh view]] tab several preferences can be set.
* [[Image:Preferences-openscad.svg|32px]] [[OpenSCAD_Preferences|OpenSCAD]]: The [[Mesh_Union|Mesh Union]], [[Mesh_Intersection|Mesh Intersection]] and [[Mesh_Difference|Mesh Difference]] commands require [http://www.openscad.org/ OpenSCAD] and use the '''OpenSCAD executable''' preference to find its executable.

==Notes==

* More mesh tools are available in the [[Image:Workbench_OpenSCAD.svg|24px]] [[OpenSCAD_Workbench|OpenSCAD Workbench]].
* See [[Mesh_Scripting|Mesh Scripting]] to manipulate and create meshes using [[Python|Python]].
* See also [[FreeCAD_and_Mesh_Import|FreeCAD and Mesh Import]]
* See [[Asymptote|Asymptote]] to export meshes to the Asymptote format, which can be used in a LaTeX document.


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Revision as of 20:43, 18 September 2020

Mesh workbench icon

Introduction

Pracovní plocha Síť pracuje s trojúhelníkovými sítěmi. Sítě jsou speciální typ 3D objektů, složených z trojúhelníků spojených jejich hranami a rohy (zvané také vrcholy).

Mnoho 3D aplikací používá s=tě jako svůj primární typ objektů, jako (software) SketchUp, Blender, Maya nebo 3d studio max. Protože sítě jsou velmi jednoduché objekty, které obsahují pouze vrcholy (body), hrany a (trojúhelníkové) plochy, jsou snadno vytvořitelné, modifikovatelné, dají se dělit, natahovat a mohou být snadno předávané z jedné aplikace do druhé bez jakékoliv ztráty. Kromě toho, protože obsahují velmi jednoduchá data, mohou jich 3D aplikace obsahovat velmi velké množství bez jakýchkoliv problémů. Z těchto důvodů jsou sítě velmi často 3D objekty využívané v aplikacích pracujících s filmy, animacemi a při tvorbě obrázků.

Na poli inženýringu však sítě představují jeden velký problém: Jsou to velmi hloupé objekty složené pouze z bodů, přímek a ploch. Jsou vytvořeny pouze z povrchů a nemají žádnou informaci o hmotě, takže se nechovají jako tělesa. V sítích není žádný automatický způsob jak zjistit jestli je bod uvnitř nebo zvenku objektu. To znamená, že všechny operace nad tělesy, jako je přidávání nebo odebírání, jsou u sítí vždy trochu složitější a často vracejí chyby.

Použití modulu Síť

V současné době má modul Síť velmi jednoduché rozhraní, všechny jeho funkce jsou seskupeny v menu Síť. Nejdůležitějšími funkcemi, které v současné době můžete provádět se sítěmi jsou:

  • Importovat sítě v několika souborových formátech
  • Exportovat sítě v několika souborových formátech
  • Konvertovat objekty Díl do sítí
  • Analyzovat zaoblení, plochy, a kontrolovat jestli mohou být bezpečně konvertovány do těles
  • Flip mesh normals
  • Uzavírat mezery v sítích
  • Odebírat plochy ze sítí
  • Spojovat, odebírat a protínat sítě
  • Vytvářet síťová primitiva (základní geometrické objekty), jako jsou kostky, koule, kužely nebo válce
  • Dělit sítě podle přímky
  • Close hole: Fills selected holes in mesh objects.
  • Add triangle: Adds faces along a boundary of an open mesh object.
  • Boolean
    • Union: Creates a mesh object that is the union of two mesh objects.
    • Intersection: Creates a mesh object that is the intersection of two mesh objects.
    • Difference: Creates a mesh object that is the difference of two mesh objects.
  • Merge: Creates a mesh object by combining the meshes of two or more mesh objects.

Preferences

There are some export preferences related to Mesh Formats but these are not used by commands belonging to this workbench. They are used by the Std Export command.

Mesh Workbench preferences can be found in the following categories of the Preferences Editor:

Notes