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Action:
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Creates a new pattern by concatenating two existing ones.
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Filename:
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kern/kern_scm/pattern_scm.cxx
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Syntax:
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(pattern:concatenate pat1 pat2 [transform])
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Arg Types:
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pat1
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pattern
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pat2
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pattern
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transform
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transform
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Returns:
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pattern
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Description:
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Creates a new pattern by concatenating two existing ones, optionally applying a transform to the second.
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pat1 specifies the first pattern.
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pat2 specifies the second pattern.
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transform is an optional argument specifying the transformation to be applied to the second pattern.
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Example:
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; pattern:concatenate
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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
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maj_rad min_rad 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
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origin (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 x-vec (gvector 2 0 0))
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;; x-vec
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(define num_x 8)
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;; num_x
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(define pat1 (pattern:linear x-vec num_x))
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;; pat1
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; make another pattern
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(define center (position -4 2 3))
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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 8)
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;; num
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(define pat2 (pattern:elliptical center normal num))
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;; pat2
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; concatenate the patterns
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(define pat (pattern:concatenate pat1 pat2))
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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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