Part Slice: Difference between revisions
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{{GuiCommand|Name=Part Slice|MenuLocation=Part → Split → Slice|Workbenches=[[Part Module|Part]]|SeeAlso=[[Part_BooleanFragments|Part Boolean Fragments]], [[Part_XOR|Part XOR]], [[Part_CompJoinFeatures|Join features]], [[Part Booleans|Part Booleans]]}} |
{{GuiCommand|Name=Part Slice|MenuLocation=Part → Split → Slice|Workbenches=[[Part Module|Part]]|SeeAlso=[[Part_BooleanFragments|Part Boolean Fragments]], [[Part_XOR|Part XOR]], [[Part_CompJoinFeatures|Join features]], [[Part Booleans|Part Booleans]]}} |
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==Description== |
==Description== |
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The [[Image:Part_Slice.svg|24px]] [[Part Slice]] AKA '''Slice to compound''' tool is used to split shapes by intersection with other shapes. For example, for a box and a plane, a compound of two solids is created. |
The [[Image:Part_Slice.svg|24px]] [[Part Slice]] AKA '''Slice to compound''' tool is used to split shapes by intersection with other shapes. For example, for a box and a plane, a compound of two solids is created. |
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The overall action of the tool is very similar to [[Image:Part_BooleanFragments.svg|24px]] [[Part BooleanFragments|Boolean Fragments]], except only the pieces from the first shape are in the result. |
The overall action of the tool is very similar to [[Image:Part_BooleanFragments.svg|24px]] [[Part BooleanFragments|Boolean Fragments]], except only the pieces from the first shape are in the result. |
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==Usage== |
==Usage== |
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# Select the object to be sliced, first, and then some objects to slice with. <br /> The order of selection is important. Compounds with self-intersections are not allowed (self-intersections sometimes can be accounted for by passing the compound through [[Image:Part_BooleanFragments.svg|24px]] [[Part_BooleanFragments|BooleanFragments]]) |
# Select the object to be sliced, first, and then some objects to slice with. <br /> The order of selection is important. Compounds with self-intersections are not allowed (self-intersections sometimes can be accounted for by passing the compound through [[Image:Part_BooleanFragments.svg|24px]] [[Part_BooleanFragments|BooleanFragments]]) |
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# Invoke the Part Slice command several ways: |
# Invoke the Part Slice command several ways: |
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[[Image:Part_SliceTree.png]] |
[[Image:Part_SliceTree.png]] |
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==Properties== |
==Properties== |
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{{TitleProperty|Slice}} |
{{TitleProperty|Slice}} |
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* {{PropertyData|Base}}: Object to be sliced. |
* {{PropertyData|Base}}: Object to be sliced. |
Revision as of 17:43, 15 February 2020
Part Slice |
Menu location |
---|
Part → Split → Slice |
Workbenches |
Part |
Default shortcut |
None |
Introduced in version |
- |
See also |
Part Boolean Fragments, Part XOR, Join features, Part Booleans |
Description
The Part Slice AKA Slice to compound tool is used to split shapes by intersection with other shapes. For example, for a box and a plane, a compound of two solids is created.
Above: the pieces were moved apart manually afterwards, to reveal the slicing
There are two commands to slice a shape: Slice apart and Slice to compound. They both create a 'Slice' parametric feature, that puts the sliced pieces into a compound. However, Slice Apart explodes the resulting compound into separate objects. "Slice to compound" is fully-parametric, and causes no trouble as the number of pieces changes. "Slice apart" will not update the number of objects as the number of pieces changes.
The output shape occupies the same space as the original. But it is split where it intersects with other shapes. The split pieces are put into a compound (or compsolid), so the object appears to remain in one piece. You need to explode the compound to get the individual pieces. If you want to access the individual pieces in a parametric way you can use Part CompoundFilter for this purpose. For quick non-parametric access use Draft Downgrade.
The tool has three modes: "Standard", "Split", and "CompSolid". There is no selection form, they are predefined but can be accessed after the operation on the resulting slices level.
"Standard" and "Split" differ by the action of the tool on wires, shells and compsolids: if "Split", those are separated; if "Standard", they are kept together (get extra segments).
Compounding structure in "Standard" and "Split" modes follows the compounding structure of shape being sliced.
In "CompSolid" mode, the output is a compsolid (or a compound of compsolids, if the resulting solids form more than one island of connectedness). Compsolid is a set of solids connected by faces; they are related to solids like wires are related to edges, and shells are related to faces; the name is probably a shortened phrase "composite solid".
The overall action of the tool is very similar to Boolean Fragments, except only the pieces from the first shape are in the result.
Usage
- Select the object to be sliced, first, and then some objects to slice with.
The order of selection is important. Compounds with self-intersections are not allowed (self-intersections sometimes can be accounted for by passing the compound through BooleanFragments) - Invoke the Part Slice command several ways:
- Press the Part Slice button in the Part toolbar
- Use the Part → Split → Slice entry in the Part menu
- Noteː The Objects to slice with must completely separate the object to be sliced. Thus a cube cannot be sliced by a wire , but by a plane derived from an extruded wire for instance.
A Slice parametric object is created. Original objects are hidden, and the result of intersection is shown in 3D view.
Tree structure of Slice
The Slice command creates a sliced object. In the following example a cube is sliced by a face.
The slice is created and each piece of it is united in a Compound.
Properties
Slice
- DataBase: Object to be sliced.
- DataTools: List of objects to slice with. (as of FreeCAD v0.17.8053, this property is not displayed in property editor, and can only be accessed via Python).
- DataMode: "Standard", "Split", or "CompSolid". "Split" is default. Standard and Split differ by the action of the tool on aggregation type shapes: if Split, those are separated; otherwise they are kept together (get extra segments).
- DataTolerance: "fuzziness" value. This is an extra tolerance to apply when searching for intersections, in addition to tolerances stored in the input shapes.
̈# Noteː Properties are accessible on the slices inner object, not on the result level.
Example
Creating a Puzzle
- Switch to Sketcher Workbench
- Switch to Part workbench.
- Switch back to Sketcher Workbench
- Switch back to Part Workbench.
- Select the splitter sketch, and apply Part Boolean Fragments. This will insert vertices where lines of splitter sketch intersect. Having them is essential for the next step to work.
- Select the splitter sketch, and apply Part Boolean Fragments. This will insert vertices where lines of splitter sketch intersect. Having them is essential for the next step to work.
- Select the rectangular face, and the BooleanFragments of splitter sketch, and apply Part Slice.
- Use Part ExplodeCompound on the sliced face, to break apart the compound made by Part Slice into individual pieces.
Note: Steps 5 and 6 can be done in single click using Part SliceApart
Scripting
The tool can by used in macros and from the python console by using the following function:
BOPTools.SplitFeatures.makeSlice(name)
- Creates an empty Slice feature. The 'Base' and 'Tools' properties must be assigned explicitly, afterwards.
- Returns the newly created object.
Slice can also be applied to plain shapes, without the need to have a document object, via:
BOPTools.SplitAPI.slice(base_shape, tool_shapes, mode, tolerance = 0.0)
This can be useful for making custom Python scripted features.
Example:
import BOPTools.SplitFeatures
j = BOPTools.SplitFeatures.makeSlice(name= 'Slice')
j.Base = FreeCADGui.Selection.getSelection()[0]
j.Tools = FreeCADGui.Selection.getSelection()[1:]
The tool itself is implemented in Python, see /Mod/Part/BOPTools/SplitFeatures.py under where FreeCAD is installed.
Version
The tool was introduced in FreeCAD v0.17.8053. FreeCAD needs to be compiled with OCC 6.9.0 or later; otherwise, the tool is unavailable.
- Primitives: Box, Cylinder, Sphere, Cone, Torus, Tube, Create primitives, Shape builder
- Creation and modification: Extrude, Revolve, Mirror, Fillet, Chamfer, Make face from wires, Ruled Surface, Loft, Sweep, Section, Cross sections, 3D Offset, 2D Offset, Thickness, Projection on surface, Attachment
- Boolean: Make compound, Explode Compound, Compound Filter, Boolean, Cut, Fuse, Common, Connect, Embed, Cutout, Boolean fragments, Slice apart, Slice, XOR
- Measure: Measure Linear, Measure Angular, Measure Refresh, Clear All, Toggle All, Toggle 3D, Toggle Delta
- 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, Surface, TechDraw, Test Framework
- Hubs: User hub, Power users hub, Developer hub