Mesh Workbench/cs: Difference between revisions

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Inspection Workbench

OpenSCAD Module

Index

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

Import mesh...: Imports a mesh object from a file.

Export mesh...: Exports a mesh object to a file.

Create mesh from shape...: Creates mesh objects from shape objects.

Refinement...: Remeshes a mesh object. introduced in version 0.19

Analyze
- Evaluate and repair mesh...: Evaluates and repairs a mesh object.
- Face info: Shows information about faces of mesh objects.
- Curvature info: Shows the absolute curvature of curvature objects at selected points.
- Check solid mesh: Checks if a mesh object is solid.
- Boundings info...: Shows the bounding box coordinates of a mesh object.

Curvature plot: Creates Mesh Curvature objects for mesh objects.

Harmonize normals: Harmonizes the normals of mesh objects.

Flip normals: Flips the normals of mesh objects.

Fill holes...: Fills holes in mesh objects.

Close hole: Fills selected holes in mesh objects.

Add triangle: Adds faces along a boundary of an open mesh object.

Remove components...: Removes faces from mesh objects.

Remove components by hand...: Removes components from mesh objects.

Create mesh segments...: Creates separate mesh segments for specified surface types of a mesh object.

Create mesh segments from best-fit surfaces...: Creates separate mesh segments for specified surface types of a mesh object, and can identify their parameters.

Smooth...: Smooths mesh objects.

Decimation...: Reduces the number of faces in mesh objects. introduced in version 0.19

Scale...: Scales mesh objects.

Regular solid... Creates a regular parametric solid 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.

Cutting
- Cut mesh: Cuts whole faces from mesh objects.
- Trim mesh: Trims faces and parts of faces from mesh objects.
- Trim mesh with a plane: Trims faces and parts of faces on one side of a plane from a mesh object.
- Create section from mesh and plane: Creates a cross section across a mesh object.
- Cross-sections...: Creates multiple cross sections across mesh objects. introduced in version 0.19

Merge: Creates a mesh object by combining the meshes of two or more mesh objects.

Unwrap Mesh: Creates a flat representation of a mesh object. introduced in version 0.19

Unwrap Face: Creates a flat representation of a face of a shape object. introduced in version 0.19

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:

Display: On the Mesh view tab several preferences can be set.
OpenSCAD: The Mesh Union, Mesh Intersection and Mesh Difference commands require OpenSCAD and use the OpenSCAD executable preference to find its executable.

Notes

More mesh tools are available in the OpenSCAD Workbench.
See Mesh Scripting to manipulate and create meshes using Python.
See also FreeCAD and Mesh Import
See Asymptote to export meshes to the Asymptote format, which can be used in a LaTeX document.

Pracovní plocha Návrh Dílu

Modul Díl

Index

Mesh

Miscellaneous: Import mesh, Export mesh, Create mesh from shape, Regular solid, Unwrap Mesh, Unwrap Face
Modifying: Harmonize normals, Flip normals, Fill holes, Close hole, Add triangle, Remove components, Remove components by hand, Smooth, Refinement, Decimation, Scale

Boolean: Union, Intersection, Difference
Cutting: Cut mesh, Trim mesh, Trim mesh with a plane, Create section from mesh and plane, Cross-sections
Components and segments: Merge, Split by components, Create mesh segments, Create mesh segments from best-fit surfaces

Analyze: Evaluate and repair mesh, Face info, Curvature plot, Curvature info, Check solid mesh, Boundings info
Additional: Import Export Preferences, OpenSCAD Workbench, Mesh 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 46: / Line 46: @@
 </div>
-* [[Image:Mesh_Import.svg|32px]] [[Mesh_Import|Import mesh...]]: Imports a mesh object from file.
+* [[Image:Mesh_Import.svg|32px]] [[Mesh_Import|Import mesh...]]: Imports a mesh object from a file.
-* [[Image:Mesh_Export.svg|32px]] [[Mesh_Export|Export mesh...]]: Exports a mesh object to file.
+* [[Image:Mesh_Export.svg|32px]] [[Mesh_Export|Export mesh...]]: Exports a mesh object to a file.
 * [[Image:Mesh_FromPartShape.svg|32px]] [[Mesh_FromPartShape|Create mesh from shape...]]: Creates mesh objects from shape objects.
-* [[Mesh_RemeshGmsh|Refinement...]]: Remeshes a mesh object. {{Version|0.19}}
+* [[Image:Mesh_RemeshGmsh.svg|32px]] [[Mesh_RemeshGmsh|Refinement...]]: Remeshes a mesh object. {{Version|0.19}}
 * Analyze
-** [[Mesh_Evaluation|Evaluate and repair mesh...]]: Evaluates and repairs a mesh object.
+** [[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_CurvatureInfo|Curvature info]]: Shows the absolute curvature of [[Mesh_VertexCurvature|curvature objects]] at selected points.
+** [[Image:Mesh_CurvatureInfo.svg|32px]] [[Mesh_CurvatureInfo|Curvature info]]: Shows the absolute curvature of [[Mesh_VertexCurvature|curvature objects]] at selected points.
-** [[Mesh_EvaluateSolid|Check solid mesh]]: Checks if a mesh object is solid.
+** [[Image:Mesh_EvaluateSolid.svg|32px]] [[Mesh_EvaluateSolid|Check solid mesh]]: Checks if a mesh object is solid.
-** [[Mesh_BoundingBox|Boundings info...]]: Shows the bounding box coordinates of a mesh object.
+** [[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.
@@ Line 67: / Line 67: @@
 * [[Image:Mesh_FlipNormals.svg|32px]] [[Mesh_FlipNormals|Flip normals]]: Flips the normals of mesh objects.
-* [[Mesh_FillupHoles|Fill holes...]]: Fills holes in mesh objects.
+* [[Image:Mesh_FillupHoles.svg|32px]] [[Mesh_FillupHoles|Fill holes...]]: Fills holes in mesh objects.
 * [[Image:Mesh_FillInteractiveHole.svg|32px]] [[Mesh_FillInteractiveHole|Close hole]]: Fills selected holes in mesh objects.
-* [[Mesh_AddFacet|Add triangle]]: Adds faces along a boundary of an open mesh object.
+* [[Image:Mesh_AddFacet.svg|32px]] [[Mesh_AddFacet|Add triangle]]: Adds faces along a boundary of an open mesh object.
 * [[Image:Mesh_RemoveComponents.svg|32px]] [[Mesh_RemoveComponents|Remove components...]]: Removes faces from mesh objects.
-* [[Mesh_RemoveCompByHand|Remove components by hand...]]: Removes components from mesh objects.
+* [[Image:Mesh_RemoveCompByHand.svg|32px]] [[Mesh_RemoveCompByHand|Remove components by hand...]]: Removes components from mesh objects.
-* [[Mesh_Segmentation|Create mesh segments...]]: Creates separate mesh segments for specified surface types of a mesh object.
+* [[Image:Mesh_Segmentation.svg|32px]] [[Mesh_Segmentation|Create mesh segments...]]: Creates separate mesh segments for specified surface types of a mesh object.
-* [[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_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.
-* [[Mesh_Smoothing|Smooth...]]: Smooths mesh objects.
+* [[Image:Mesh_Smoothing.svg|32px]] [[Mesh_Smoothing|Smooth...]]: Smooths mesh objects.
-* [[Mesh_Decimating|Decimation...]]: Reduces the number of faces in mesh objects. {{Version|0.19}}
+* [[Image:Mesh_Decimating.svg|32px]] [[Mesh_Decimating|Decimation...]]: Reduces the number of faces in mesh objects. {{Version|0.19}}
-* [[Mesh_Scale|Scale...]]: Scales mesh objects.
+* [[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
-** [[Mesh_Union|Union]]: Creates a mesh object that is the union of two mesh objects.
+** [[Image:Mesh_Union.svg|32px]] [[Mesh_Union|Union]]: Creates a mesh object that is the union of two mesh objects.
-** [[Mesh_Intersection|Intersection]]: Creates a mesh object that is the intersection of two mesh objects.
+** [[Image:Mesh_Intersection.svg|32px]] [[Mesh_Intersection|Intersection]]: Creates a mesh object that is the intersection of two mesh objects.
-** [[Mesh_Difference|Difference]]: Creates a mesh object that is the difference 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.
-** [[Mesh_PolyTrim|Trim mesh]]: Trims faces and parts of faces from mesh objects.
+** [[Image:Mesh_PolyTrim.svg|32px]] [[Mesh_PolyTrim|Trim mesh]]: Trims faces and parts of faces from mesh objects.
-** [[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_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.
-** [[Mesh_SectionByPlane|Create section from mesh and plane]]: Creates a cross section across a mesh object.
+** [[Image:Mesh_SectionByPlane.svg|32px]] [[Mesh_SectionByPlane|Create section from mesh and plane]]: Creates a cross section across a mesh object.
-** [[Mesh_CrossSections|Cross-sections...]]: Creates multiple cross sections across mesh objects. {{Version|0.19}}
+** [[Image:Mesh_CrossSections.svg|32px]] [[Mesh_CrossSections|Cross-sections...]]: Creates multiple cross sections across mesh objects. {{Version|0.19}}
-* [[Mesh_Merge|Merge]]: Creates a mesh object by combining the meshes of two or more mesh objects.
+* [[Image:Mesh_Merge.svg|32px]] [[Mesh_Merge|Merge]]: Creates a mesh object by combining the meshes of two or more mesh objects.
-* [[MeshPart_CreateFlatMesh|Unwrap Mesh]]: Creates a flat representation of a mesh object. {{Version|0.19}}
+* [[Image:MeshPart_CreateFlatMesh.svg|32px]] [[MeshPart_CreateFlatMesh|Unwrap Mesh]]: Creates a flat representation of a mesh object. {{Version|0.19}}
-* [[MeshPart_CreateFlatFace|Unwrap Face]]: Creates a flat representation of a face of a shape 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==
@@ Line 118: / Line 118: @@
 * 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]].
-* Meshes can also be manipulated with [[Mesh_Scripting|Python scripts]].
-* See also: [[FreeCAD_and_Mesh_Import|FreeCAD and Mesh Import]]
+* 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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