Mesh Workbench/tr: Difference between revisions
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[[Image:Workbench_Mesh.svg|64px]] |
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== Introduction == |
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⚫ | Many 3D applications, like [http://en.wikipedia.org/wiki/Sketchup Sketchup], [http://en.wikipedia.org/wiki/Blender_(software) Blender], [http://en.wikipedia.org/wiki/Maya_(software) Maya] and [http://en.wikipedia.org/wiki/3d_max 3D Studio Max], use meshes as their primary type of 3D object. Since meshes are very simple objects, containing only vertices (points), edges and triangular faces, they are very easy to create, modify, subdivide, stretch, and can easily be passed from one application to another without any loss of details. In addition, since meshes contain very simple data, 3D applications can usually manage very large quantities of them without using a lot of resources. For these reasons, meshes are often the 3D object type of choice for applications dealing with movies, animation, and image creation. |
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An example of a mesh object |
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However, in the field of engineering meshes present one big limitation: they are only made of surfaces, and have no mass information, so they don't behave as solids. This means that all solid-based operations, such as addition or subtraction, are difficult to perform on meshes. The Mesh Workbench is useful to import 3D data in mesh format, to analyse it, detect errors, and finally convert it to a solid, for use with the [[Part Workbench]]. |
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⚫ | Many 3D applications |
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{{TOCright}} |
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In the field of engineering, however, meshes present one big limitation: They are very dumb objects, only composed of points, lines and faces. They are only made of surfaces, and have no mass information, so they don't behave as solids. In a mesh there is no automatic way to know if a point is inside or outside the object. This means that all solid-based operations, such as addition or subtraction, are always a bit difficult to perform on meshes, and return errors often. |
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== Tools == |
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In FreeCAD, since it is an engineering application, we would obviously prefer to work with more intelligent types of 3D objects, that can carry more information, such as mass, solid behaviour, or even custom parameters. The mesh module was first created to serve as a testbed, but to be able to read, manipulate and convert meshes is also highly important for FreeCAD. Very often, in your workflow, you will receive 3D data in mesh format. You will need to handle that data, analyse it to detect errors or other problems that prevent converting them to more intelligent objects, and finally, convert them to more intelligent objects, handled by the [[Part Module]]. |
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The Mesh Workbench has a simple interface; all its functions are grouped in the {{MenuCommand|Mesh}} menu. |
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== Using the mesh module == |
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=== General tools === |
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The mesh module has currently a very simple interface, all its functions are grouped in the '''Mesh''' menu entry. The most important operations you can currently do with meshes are: |
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* [[Image:Mesh_ImportMesh.png|32px]] [[Mesh Import|Import Mesh]]: Import meshes in several file formats |
* [[Image:Mesh_ImportMesh.png|32px]] [[Mesh Import|Import Mesh]]: Import meshes in several file formats |
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* [[Image:Mesh_ExportMesh.png|32px]] [[Mesh Export|Export Mesh]]: Export meshes in several file formats |
* [[Image:Mesh_ExportMesh.png|32px]] [[Mesh Export|Export Mesh]]: Export meshes in several file formats |
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* [[Image:Mesh MeshFromShape.png|32px]] [[Mesh MeshFromShape|Create Mesh from shape]]: Convert [[Part Module|Part]] objects into meshes |
* [[Image:Mesh MeshFromShape.png|32px]] [[Mesh MeshFromShape|Create Mesh from shape]]: Convert [[Part Module|Part]] objects into meshes |
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* [[Image:Mesh HarmonizeNormals.png|32px]] [[Mesh HarmonizeNormals|Harmonize Normals]]: Harmonize normals |
* [[Image:Mesh HarmonizeNormals.png|32px]] [[Mesh HarmonizeNormals|Harmonize Normals]]: Harmonize normals |
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* [[Image:Mesh_FlipNormals.png|32px]] [[Mesh FlipNormals|Flip Normals]]: Flip [http://en.wikipedia.org/wiki/Surface_normal normals] |
* [[Image:Mesh_FlipNormals.png|32px]] [[Mesh FlipNormals|Flip Normals]]: Flip [http://en.wikipedia.org/wiki/Surface_normal normals] |
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* [[Mesh FillHoles|Fill Holes...]]: Fill up holes |
* [[Mesh FillHoles|Fill Holes...]]: Fill up holes |
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* [[Image:Mesh_FillInteractiveHole.png|32px]] [[Mesh FillInteractiveHole|Close hole]]: Close holes in meshes |
* [[Image:Mesh_FillInteractiveHole.png|32px]] [[Mesh FillInteractiveHole|Close hole]]: Close holes in meshes |
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* [[Mesh AddTriangle|Add triangle]]: Add triangle |
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* [[Image:Mesh_RemoveComponents.png|32px]] [[Mesh RemoveComponents|Remove components...]]: Remove components of meshes |
* [[Image:Mesh_RemoveComponents.png|32px]] [[Mesh RemoveComponents|Remove components...]]: Remove components of meshes |
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* [[Mesh RemoveCompByHand|Remove components by hand...]]: Remove components of meshes by hand |
* [[Mesh RemoveCompByHand|Remove components by hand...]]: Remove components of meshes by hand |
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* [[Mesh |
* [[Mesh CreateMeshSegment|Create mesh segments...]]: Creates mesh segments |
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* [[Mesh Smooth|Smooth...]]: Smooth mesh |
* [[Mesh Smooth|Smooth...]]: Smooth mesh |
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* [[Mesh Scale|Scale]] |
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=== Analyze === |
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=== Regular solid === |
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* [[Image:Mesh_Cube.png|32px]] Create a mesh cube |
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* [[Image:Mesh_Torus.png|32px]] Create a mesh torus |
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=== Boolean === |
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=== Cutting === |
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* [[Image:Mesh Cut.png|32px]] [[Mesh Cut|Cut mesh]]: Cut meshes along a line |
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* Create section from mesh and plane |
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* Do '''Boolean''' operations with meshes |
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=== Other === |
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* [[Mesh Merge|Merge]]: Merges meshes |
* [[Mesh Merge|Merge]]: Merges meshes |
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* [[Mesh SelectMesh|Select Mesh]]: Selects meshes |
* [[Mesh SelectMesh|Select Mesh]]: Selects meshes |
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* [[Mesh SplitMesh|Split Mesh]]: Splits meshes |
* [[Mesh SplitMesh|Split Mesh]]: Splits meshes |
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* [[Image:Mesh MakeSegment.png|32px]] [[Mesh MakeSegment|Make segment]]: Makes a segment |
* [[Image:Mesh MakeSegment.png|32px]] [[Mesh MakeSegment|Make segment]]: Makes a segment |
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* [[Mesh CreateMeshSegment|Create mesh segments...]]: Creates mesh segments |
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== Preferences == |
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These are only some of the basic operations currently present in the Mesh module interface. |
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==Links== |
==Links== |
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* [[ |
* [[FreeCAD and Mesh Import]] |
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{{docnav/tr|PartDesign Workbench/tr|Part Module/tr}} |
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[[Category:User_Documentation/tr]] |
Revision as of 14:38, 14 January 2019
Introduction
The Mesh Workbench handles triangle meshes. Meshes are a special type of 3D object, composed of triangular faces connected by their vertices and edges.
Many 3D applications, like Sketchup, Blender, Maya and 3D Studio Max, use meshes as their primary type of 3D object. Since meshes are very simple objects, containing only vertices (points), edges and triangular faces, they are very easy to create, modify, subdivide, stretch, and can easily be passed from one application to another without any loss of details. In addition, since meshes contain very simple data, 3D applications can usually manage very large quantities of them without using a lot of resources. For these reasons, meshes are often the 3D object type of choice for applications dealing with movies, animation, and image creation.
However, in the field of engineering meshes present one big limitation: they are only made of surfaces, and have no mass information, so they don't behave as solids. This means that all solid-based operations, such as addition or subtraction, are difficult to perform on meshes. The Mesh Workbench is useful to import 3D data in mesh format, to analyse it, detect errors, and finally convert it to a solid, for use with the Part Workbench.
Tools
The Mesh Workbench has a simple interface; all its functions are grouped in the Mesh menu.
General tools
- Import Mesh: Import meshes in several file formats
- Export Mesh: Export meshes in several file formats
- Create Mesh from shape: Convert Part objects into meshes
- Curvature Plot: Creates a curvature plot
- Harmonize Normals: Harmonize normals
- Flip Normals: Flip normals
- Fill Holes...: Fill up holes
- Close hole: Close holes in meshes
- Add triangle: Add triangle
- Remove components...: Remove components of meshes
- Remove components by hand...: Remove components of meshes by hand
- Create mesh segments...: Creates mesh segments
- Smooth...: Smooth mesh
- Scale
Analyze
Analysis of curvature, faces, and check if a mesh can be safely converted into a solid
- Evaluate & Repair mesh...: Evaluates and repairs meshes
- Face Info: Gives info on faces
- Curvature Info: Gives info on curvature
- Check solid mesh: Checks the solid if it can be converted to a mesh
- Boundings info...: Evaluates the bounding box of a mesh
Regular solid
Regular solid... Create mesh primitives, like cubes, cylinders, cones, or spheres:
- Create a mesh cube
- Create a mesh cylinder
- Create a mesh cone
- Create a mesh sphere
- Create a mesh ellipsoid
- Create a mesh torus
Boolean
- Union: Does a union (fusion) on meshes
- Intersection: Does an intersection (common) on meshes
- Difference: Does a difference (cut) on meshes
Cutting
- Cut mesh: Cut meshes along a line
- Trim mesh: Trims meshes
- Trim mesh with a plane: Trims meshes with a plane
- Create section from mesh and plane
Other
- Merge: Merges meshes
- Select Mesh: Selects meshes
- Split Mesh: Splits meshes
- File:Mesh MakeSegment.png Make segment: Makes a segment
Preferences
- Preference Import-Export
More mesh tools are available in the OpenSCAD Workbench.
Meshes can also be handled by Mesh Scripting.
Links