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99 lines
4.5 KiB
Plaintext
99 lines
4.5 KiB
Plaintext
/*!
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\page create_explode_page Explode
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To \b Explode an object into sub-shapes, in the <b>Main Menu</b>
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select <b>New Entity > Explode</b>. This operation opens the
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<b>Sub Shapes Selection</b> dialog box.
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\image html neo-obj1.png
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To create a list of sub-shapes (vertices, edges, wires etc.) of the
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given shape using the \b Explode operation, you need to define the <b>Main
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Object</b>, which will be exploded and the <b>Type of Sub-shapes</b> you wish to
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obtain from it.
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The \b Result of the operation will be a List of \b GEOM_Objects
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(vertexes, edges, wires, faces, shells or solids).
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The choices available in the <b>Sub Shapes Type</b> combo box depend on the type
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of selected <b>Main Object</b>:
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- \b Compound: to extract compounds;
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- \b Compsolid: to extract compsolids;
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- \b Solid: to extract solids;
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- \b Shell: to extract shells;
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- \b Face: to extract faces;
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- \b Wire: to extract wires;
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- \b Edge: to extract edges;
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- \b Vertex: to extract vertices;
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- \b Shape: to extract top-level contents of the compound shape;
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- \b Flat: to extract "flat" contents of the compound shape.
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Note: "flat" contents means that top-level simple-type sub-shapes are extracted from
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the compound object recursively (i.e. there are no compounds in the result).
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Let us take, for example, compound C1 that contains solid S1 and another compound C2 that
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contains solids S2 and S3 (see the picture below):
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- Explode operation with \b Shape type given as parameter will return S1 and C2;
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- Explode operation with \b Flat type given as parameter will return S1, S2 and S3.
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\image html flat_contents.png
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Switching on <b>Select Sub-shapes</b> check box allows manual selection of sub-shapes
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to be extracted from the main object. In this mode it is possible to select sub-shapes
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directly in 3D viewer.
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When <b>Select Sub-shapes</b> check box is switched on, additional \b Filter controls
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allow to automatically pick up entities, which satisfy the specified threshold value(s).
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The numerical functor for each sub-shape that is compared with the threshold value(s)
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is computed according to the topological properties of the shape:
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- length for edges and wires;
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- area for faces and shells;
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- volume for solids, compounds and compsolids.
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Filtering capabilities are not available for vertices.
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To filter out some entities it is necessary to do the following:
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- Activate one or two filtering controls by switching on the corresponding check boxes;
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- Select the required threshold comparator type; the following choices are available:
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- <b>Less Than</b> or <b>Equal or Less Than</b> for the first comparator;
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- <b>Greater Than</b> or <b>Equal or Greater Than</b> for the second comparator;
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- Enter the required threshold value (values);
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- Press \b Apply button in the \b Filter group.
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The entities, which correspond to the entered filtering parameters, will be automatically highlighted
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in the 3D viewer.
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Using <b>TUI Commands</b> you can perform this operation in a
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variety of ways:
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- <em>geompy.ExtractShapes(Shape, Type, isSorted)</em> explodes a
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Shape into sub-shapes of a given Type and returns a List of sub-shapes.
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This method does not return the Shape itself if it matches the Type.
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- <em>geompy.SubShapeAll(Shape, Type)</em> explodes a Shape into
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sub-shapes of a given Type and returns a List of sub-shapes.
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- <em>geompy.SubShapeAllIDs(Shape, Type)</em> explodes a Shape into sub-shapes of a given Type and returns a List of IDs of sub-shapes.
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- <em>geompy.SubShapeAllSortedCentres(Shape, Type)</em> explodes a
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shape into sub-shapes of a given type and sorts them taking into account
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their gravity centers, to provide a stable order of sub-shapes.
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It returns a list of sub-shapes.
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- <em>geompy.SubShapeAllSortedCentresIDs(Shape, Type)</em> explodes
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a shape into sub-shapes of a given type and sorts them taking into
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account their gravity centers, to provide a stable order of sub-shapes.
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It returns a List of IDs of sub-shapes.
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- <em>geompy.SubShape(Shape, Type, ListOfInd)</em> allows to obtain
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a compound of sub-shapes of the Shape, selected by their indexes in a
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list of all sub-shapes of the given Type. Each index is in the range
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[1, Nb_Sub-Shapes_Of_Given_Type].
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- <em>geompy.SubShapeSortedCentres(Shape, Type, ListOfInd)</em>
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allows to obtain a compound of sub-shapes of the Shape, selected by
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their indexes in a sorted list of all sub-shapes of the given Type. Each
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index is in the range [1, Nb_Sub-Shapes_Of_Given_Type]
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<b>Arguments: </b>1 SHAPE + 1 type of SubShape.
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<b>Example:</b>
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\image html explode.png "A box exploded into faces"
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*/
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