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Action:
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Finds the pattern index associated with a given entity.
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Filename:
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kern/kern_scm/pattern_scm.cxx
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Syntax:
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(find:pattern-index entity)
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Arg Types:
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entity
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entity
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Returns:
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integer
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Errors:
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An invalid entity was specified.
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Description:
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Finds the zero-based pattern index associated with the entity specified by
entity.
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entity specifies the entity to be searched.
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Example:
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; find:pattern-index
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; make a prism
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(define height 1)
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;; height
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(define maj_rad 1)
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;; maj_rad
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(define min_rad 0.5)
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;; min_rad
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(define num-sides 3)
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;; num-sides
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(define prism (solid:prism height maj_rad min_rad
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num-sides))
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;; prism
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; position the prism
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(define origin (position 1 2 3))
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;; origin
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(define transform (entity:transform prism
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(transform:axes origin
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(gvector 1 0 0) (gvector 0 1 0))))
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;; transform
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; make a pattern
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(define center origin)
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;; center
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(define normal (gvector 0 0 1))
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;; normal
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(define num-radial 4)
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;; num-radial
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(define num-angular 5)
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;; num-angular
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(define spacing 3)
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;; spacing
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(define pat (pattern:radial center normal
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num-radial num-angular spacing))
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;; pat
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; apply the pattern to the prism
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(define body (entity:pattern prism pat))
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;; body
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; find the pattern index of a specific lump
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(define lump (list-ref (entity:lumps body) 8))
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;; lump
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(define index (find:pattern-index lump))
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;; index
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; check the index
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(law:equal-test index 8)
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;; #t
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