Mesh Workbench/ja: Difference between revisions

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[[Image:Workbench_Mesh.svg|64px]]
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==Introduction==


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== メッシュモジュールの使用方法 ==
== メッシュモジュールの使用方法 ==
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* 複数のファイルフォーマットでのメッシュのインポート
* 複数のファイルフォーマットでのメッシュのインポート
* 複数のファイルフォーマットでのメッシュのエクスポート
* 複数のファイルフォーマットでのメッシュのエクスポート
* [[Part Module|パート]]オブジェクトのメッシュへの変換
* [[Part_Workbench|パート]]オブジェクトのメッシュへの変換
* 曲率、面の解析とメッシュを問題なくソリッドに変換できるかどうかのチェック
* 曲率、面の解析とメッシュを問題なくソリッドに変換できるかどうかのチェック
* メッシュ[http://en.wikipedia.org/wiki/Surface_normal 法線]の反転
* メッシュ[http://en.wikipedia.org/wiki/Surface_normal 法線]の反転
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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.
=== 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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今のところメッシュモジュールのインターフェイスにはいくつかの基本的な操作しかありません。しかし [[Mesh Scripting/jp|スクリプト]]を使用すればさらに多くの処理をFreeCADのメッシュに対して行うこともできます。
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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.
==リンク==


* [[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.

* [[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.

* [[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.

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

* [[Image:Mesh_SplitComponents.svg|32px]] [[Mesh_SplitComponents|Split by components]]: Splits a mesh object into its components.

* [[Image:MeshPart_CreateFlatMesh.svg|32px]] [[MeshPart_CreateFlatMesh|Unwrap mesh]]: Creates a flat representation of a mesh object.

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

==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|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.

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==リンク==
* [[FreeCAD_and_Mesh_Import|FreeCAD and Mesh Import]]
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* [[FreeCAD_and_Mesh_Import|FreeCAD and Mesh Import]]
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Latest revision as of 13:17, 26 November 2023

Mesh workbench icon

Introduction

メッシュワークベンチでは三角形メッシュを取り扱えます。メッシュは3Dオブジェクトの特別なタイプの一つで、エッジと角(頂点とも呼ばれます)によってつながった三角形によって構成されます。

SketchupBlenderMaya3d studio maxといった多くの3Dアプリケーションでは基本となる3Dオブジェクトのタイプとしてメッシュを使用しています。これはメッシュが頂点(点)、エッジ、(三角形)面のみからなる非常にシンプルなオブジェクトで作成や変更、分割、伸縮をとても簡単に行うことができ、劣化なしで容易にアプリケーション間でのやり取りができるためです。また非常にシンプルなデータからできているので3Dアプリケーションは非常に大量のデータであっても普通は問題を起こすことなく扱うことができます。これらの理由からしばしばメッシュは映画やアニメーション、画像作成といったアプリケーションで取り扱う3Dオブジェクトの選択肢となります。

しかしエンジニアリング分野ではメッシュには大きな欠点があります。点とラインと面だけでできているせいで非常に融通がききづらいのです。メッシュは面だけで形づくられ、体積情報がないのでソリッドとして振る舞うことができません。メッシュではある点がオブジェクトの内側にあるのか外側にあるのか自動で判定する方法がありません。つまり加算や減算に代表される全てのソリッドベースの操作はメッシュに対して行うことがかなり難しく、エラーが起きやすいのです。

メッシュモジュールの使用方法

メッシュモジュールの現在のインターフェイスは非常にシンプルで全ての機能はMeshメニューにまとめられています。メッシュに対して行うことのできる操作の中でももっとも重要なものは以下の通りです:

  • 複数のファイルフォーマットでのメッシュのインポート
  • 複数のファイルフォーマットでのメッシュのエクスポート
  • パートオブジェクトのメッシュへの変換
  • 曲率、面の解析とメッシュを問題なくソリッドに変換できるかどうかのチェック
  • メッシュ法線の反転
  • メッシュに開いた穴の穴埋め
  • メッシュ面の除去
  • メッシュの結合、減算、交差
  • 直方体、球、円錐、円筒といったメッシュプリミティブの作成
  • ラインに沿ったメッシュの切断
  • 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.
  • Unwrap mesh: Creates a flat representation of a mesh object.
  • Unwrap face: Creates a flat representation of a face of a shape object.

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:

リンク