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117 lines
5.5 KiB
Plaintext
117 lines
5.5 KiB
Plaintext
/*!
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\page partition_page Partition
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For a detailed description of the Partition operation please refer to <a href="SALOME_BOA_PA.pdf">this document</a>.
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It provides a general review of the Partition and Boolean operations algorithms, describes the usage methodology and highlights
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major limitations of these operations.
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Perhaps you also ask yourself : \ref partition_explanation "What's the difference between partition, compounds and fuse operation?"
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To produce a \b Partition in the <b>Main Menu</b> select <b>Operations -> Partition</b>
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This operation builds a compound by partitioning a set of input objects by a set of tool objects.
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The \b Result of the operation is a \b GEOM_Object.
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\image html partition1.png
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<b>Arguments:</b> Name + 2 lists of shapes (the shapes from the
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first list will be intersected with the shapes from the second list) +
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Resulting Type of shape.
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As far as the partition of two objects can produce any type of
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geometrical objects, <b>Resulting type</b> box allows choosing the
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preferable result, i.e. a solid, a shell, a list of faces, etc.
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The <b>Resulting type</b> has to be equal or lower than the type of the
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\em Objects. In other words, if the \em Objects don't contain any
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shape of this type, Partition fails.
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<b>Keep shapes of lower type</b> checkbox manages standalone shapes of
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type other than the \em Limit. If it is checked, lower dimension
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objects will be preserved, else they will be lost.
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For example, you partition a box (Solid) and a face (Face)
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without any tool (the box is split in two parts by the shape). If you
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choose the Resulting Type "Solid", you will
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obtain a compound of two solids, but if you also check <b>Keep shapes of lower
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type</b> checkbox, you will obtain a compound of two solids and one
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face (there will be a hole in the resulting face, where the original
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face intersects with the box, see the corresponding \ref partition_picture_3 "picture" below).
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<b>No sub-shapes intersection (Compounds only)</b> check box affects
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only input shapes of the Compound type.
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- If this option is switched off (default behavior) each input compound will be automatically
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exploded into sub-shapes and the partition between these shapes will be also computed.
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- If this option is switched on, the partition between sub-shapes will not be performed.
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In this case the Partition algorithm will work faster, but the result might differ from the
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default behavior.
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<b>Detect Self-intersections</b> check box is used to check self-intersection of arguments.
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It is enabled only if <b>No sub-shapes intersection (Compounds only)</b> is checked.
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- If this option is switched off (by default), the partition algorithm is
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performed without self-intersection checks.
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- If this option is switched on, each input shape is checked for self-intersection.
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If self-intersection is detected, the operation is aborted.
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\note This algorithm does not find all types of self-intersections. It is tuned
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to detect vertex/vertex, vertex/edge, edge/edge, vertex/face and edge/face
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interferences. Face/face interference detection is switched off as it
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is a time-consuming operation that gives an impact on performance. To find
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all self-intersections please use \ref check_self_intersections_page
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"Detect Self-intersection tool".
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<b>Use Fuzzy Parameter</b> check box is used to enable the usage of the fuzzy tolerance
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inside the partition algorithm. The fuzzy tolerance itself can be given in the Fuzzy
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Parameter input box.
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- Activate \ref restore_presentation_parameters_page "Advanced options" if required.
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\note Partition is a complex operation, so its result of it depends
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on the quality of the initial shapes. Sometimes, if partition fails,
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such healing operations as <b>Shape Processing</b>
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and <b>Limit Tolerance</b> can help to attune source shapes to obtain correct result of the Partition.
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See also \ref tui_limit_tolerance "TUI example" of shape healing.
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<b>TUI Command (with sub-shapes intersection):</b>
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<em>geompy.MakePartition(ListOfShapes, ListOfTools, ListOfKeepInside,
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ListOfRemoveInside, Limit, RemoveWebs, ListOfMaterials,
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KeepNonlimitShapes, fuzzyParam)</em>
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<b>TUI Command (without sub-shapes intersection):</b>
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<em>geompy.MakePartitionNonSelfIntersectedShape(ListOfShapes,
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ListOfTools, ListOfKeepInside, ListOfRemoveInside, Limit, RemoveWebs,
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ListOfMaterials, KeepNonlimitShapes, checkSelfInte, fuzzyParam)</em>
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Here,
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- \em ListOfShapes is a list of shapes to be intersected
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- \em ListOfTools is a list of shapes to intersect the shapes from
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\em ListOfShapes
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- \em Limit is a Type of resulting shapes
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- \em KeepNonlimitShapes is a flag that allows to preserve standalone
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shapes of low dimension (than \em Limit) in the result.
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- \em checkSelfInte is a flag that indicates if the arguments should
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be checked for self-intersection prior to the operation.
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- \em fuzzyParam is the used fuzzy tolerance inside the partition algorithm.
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This tolerance is ignored, if this parameter is omitted or not positive.
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- Other parameters are obsolete and kept only for compatibility with
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previous versions of SALOME.
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<b>Examples:</b>
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\anchor partition_picture_1
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\image html partitionsn1.png "Input data: box intersected by plane"
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\anchor partition_picture_2
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\image html partitionsn2.png "Result: box partitioned by plane"
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\anchor partition_picture_3
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\image html partitionsn3.png "Result: partitioned box and plane (both as \em Objects); resulting type is \em Solid; option 'Keep shapes of lower type' is on"
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Our <b>TUI Scripts</b> provide you with useful examples of \ref tui_partition "Basic Operations".
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*/
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