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Action:
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Computes the OR of two or more entity-filters.
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Filename:
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kern/kern_scm/filt_scm.cxx
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Syntax:
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(filter:or filt1 ... filtn)
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Arg Types:
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filt1
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entity-filter
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filtn
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entity-filter
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Returns:
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entity-filter
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Description:
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Multiple filters can be combined using the Boolean
or filter to form a single filter that can be applied to a single entity or a list of entities. An entity will be selected if at least one part of the combined filter returns
#t.
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filt1 is an entity-filter. The ellipsis ( ... ) indicates one or more
entity-filters.
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Example:
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; filter:or
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; Create solid block 1.
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(define block1
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(solid:block (position 10 0 10)
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(position 20 30 40)))
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;; block1
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; Create linear edge 2.
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(define edge1 (edge:linear (position 0 0 0)
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(position 10 10 10)))
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;; edge1
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; Create circular edge 3.
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(define edge2 (edge:circular (position 0 0 0) 20))
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;; edge2
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; Change the color of the entities so far to red.
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(entity:set-color (part:entities) 1)
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;; ()
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; Create solid sphere 4.
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(define sphere1 (solid:sphere
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(position 20 30 40) 30))
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;; sphere1
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; Create solid sphere 5.
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(define cyl1 (solid:cylinder
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(position 40 0 0) (position 5 5 5) 8))
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;; cyl1
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; Create linear edge 6.
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(define edge3 (edge:linear (position 0 50 0)
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(position 50 50 0)))
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;; edge3
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; Create spline edge 7.
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(define edge4 (edge:spline (list
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(position 20 20 20) (position 10 20 30)
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(position 50 40 10))))
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;; edge4
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; Define the green-or-solid filter.
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(define green-or-solid (filter:or (filter:color 2)
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(filter:type "solid?")))
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;; green-or-solid
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; Apply a green-or-solid filter and
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; obtain the entities.
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(part:entities green-or-solid)
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;; (#[entity 2 1] #[entity 5 1] #[entity 6 1]
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;; #[entity 7 1] #[entity 8 1])
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