Part BooleanFragments/ro: Difference between revisions
No edit summary |
No edit summary |
||
Line 13: | Line 13: | ||
Instrumentul are trei moduri: "Standard", "Split" și "CompSolid". |
Instrumentul are trei moduri: "Standard", "Split" și "CompSolid". |
||
"Standard" |
"Standard" și "Split" diferă de acțiunea instrumentului pe fire/polilinii, shells și compsolids: dacă este "Split", acestea sunt separate; dacă este "Standard", acestea sunt păstrate împreună (obțineți segmente suplimentare). |
||
Compounding structure in "Standard" and "Split" modes follows the compounding structure of inputs. That is, if you feed in two compounds, each containing a sphere like on example above, the result will also contain two compounds, each containing the pieces of the originally contained sphere. That means, the common piece will be repeated twice in the result. Only if the input shperes are both not in compounds, the result will contain the common piece once. |
Compounding structure in "Standard" and "Split" modes follows the compounding structure of inputs. That is, if you feed in two compounds, each containing a sphere like on example above, the result will also contain two compounds, each containing the pieces of the originally contained sphere. That means, the common piece will be repeated twice in the result. Only if the input shperes are both not in compounds, the result will contain the common piece once. |
Revision as of 18:50, 25 October 2018
Part BooleanFragments |
Menu location |
---|
Part → Split → Boolean Fragments |
Workbenches |
Part |
Default shortcut |
None |
Introduced in version |
- |
See also |
Part Slice, Part XOR, Join features, Part Booleans |
Descriere
Tool to compute all fragments that can result from applying Boolean operations between input shapes. For example, for two intersecting spheres, three non-overlapping but touching solids are generated.
(pe imaginea de mai sus, piesele au fost mutate separat manual după aceea, pentru a dezvălui felierea)
Forma de ieșire este întotdeauna un compus. Conținutul compusului depinde de tipurile de intrare și de modul de operare. Asta înseamnă că nu primești imediat accesul la piesele individuale ale rezultatului - piesele rămân grupate împreună. Piesele individuale pot fi extrase prin explodarea compusului (Draft Downgrade).
Instrumentul are trei moduri: "Standard", "Split" și "CompSolid".
"Standard" și "Split" diferă de acțiunea instrumentului pe fire/polilinii, shells și compsolids: dacă este "Split", acestea sunt separate; dacă este "Standard", acestea sunt păstrate împreună (obțineți segmente suplimentare).
Compounding structure in "Standard" and "Split" modes follows the compounding structure of inputs. That is, if you feed in two compounds, each containing a sphere like on example above, the result will also contain two compounds, each containing the pieces of the originally contained sphere. That means, the common piece will be repeated twice in the result. Only if the input shperes are both not in compounds, the result will contain the common piece once.
In "CompSolid" mode, the solids are joined into a compsolid (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 output is a non-nested compound of compsolids
How to use
- Select objects to be intersected.
The order of selection is not important, since the action of the tool is symmetric. It is enough to select one sub-shape of each object (e.g., faces). You can also select a compound containing all the shapes to be connected, e.g. Draft Array. - Invoke the Part BooleanFragments command.
A Boolean Fragments parametric object is created. Original objects are hidden, and the result of intersection is shown in 3D view.
Proprietăți
Boolean Fragments
- DateObjects: List of objects to be intersected. Generally, at least two objects are needed, but a single compound containing the shapes to intersect will do as well. (as of FreeCAD v0.17.8053, this property is not displayed in property editor, and can only be accessed via Python).
- DateMode: "Standard", "Split", or "CompSolid". "Standard" 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).
- DateTolerance: "fuzziness" value. This is an extra tolerance to apply when searching for intersections, in addition to tolerances stored in the input shapes.
Implementarea detaliilor
Boolean Fragments tool in "Standard mode" is OpenCascade's General Fuse Operator (GFA). It accepts a combination of probably all shape types, and the logic of output is quite convoluted. See OpenCascade user guide: Boolean operations.
For "Split" and "CompSolid" modes, extra post-processing is done by FreeCAD.
Script
The tool can by used in macros and from the python console by using the following function:
BOPTools.SplitFeatures.makeBooleanFragments(name)
- Creates an empty BooleanFragments feature. The 'Objects' property must be assigned explicitly, afterwards.
- Returns the newly created object.
BooleanFragments can also be applied to plain shapes, without the need to have a document object, via:
import BOPTools.SplitAPI
BOPTools.SplitAPI.booleanFragments(list_of_shapes, mode, tolerance = 0.0)
# OR, for Standard mode:
list_of_shapes = [App.ActiveDocument.Sphere.Shape, App.ActiveDocument.Sphere001.Shape]
pieces, map = list_of_shapes[0].generalFuse(list_of_shapes[1:], tolerance)
# pieces receives a compound of shapes; map receives a list of lists of shapes, defining list_of_shapes <--> pieces correspondence
This can be useful for making custom Python scripted features.
Exempluː
import BOPTools.SplitFeatures
j = BOPTools.SplitFeatures.makeBooleanFragments(name= 'BooleanFragments')
j.Objects = FreeCADGui.Selection.getSelection()
The tool itself is implemented in Python, see /Mod/Part/BOPTools/SplitFeatures.py under where FreeCAD is installed.
Versiune
Acest instrument a fost introdus în FreeCAD v0.17.8053. FreeCAD și necesită compilarea cu OCC 6.9.0 sau mai recent; altfel instrumentul este inutilizabil.