Expression functions

Pattern matching

String patterns

You can use string patterns anywhere an expression function needs a name (such as a parameter or node name) to match multiple things at once.

`*`	Matches any string.
`?`	Matches any single character.
`[chars]`	Matches any of the characters between the square brackets. This does not support character ranges using a hyphen (you cannot do a-z).
`^pattern`	Removes strings matching `pattern` from the previous match.
`@pattern`	Matches object group, channel group, and/or bundle (depending on context).

Examples:

`geo*`	Matches everything beginning with “geo”.
`[gG]eo*`	Matches everything beginning with “geo” or “Geo”.
`?eo*`	Matches everything that has any character followed by “eo” and then any number of characters.
`* ^geo1`	Matches everything except the string “geo1”.

Numeric patterns in the Group node

`*`	Matches all points/primitives.
`number`	Matches a single number.
`start-end`	Matches all numbers in a range (inclusive).
`start-end:step`	Matches all numbers in a range, matching only every `step`the number.
`!pattern`	Matches everything except `pattern`.
`^pattern`	Removes numbers matching `pattern` from the previous match.

Examples:

`10-20`	Match numbers 10 through 20 (including 10 and 20).
`0-30:2`	Match every other number between 0 and 30 (0, 2, 4, 6, … 30).
`0-30:2,3`	Match every 2 of 3 numbers between 0 and 30 (0, 1, 3, 4, 6, 7, … 30).
`!3-5`	Match everything except 3-5.
`0-100:2 ^10-20`	Match every other number between 0 and 100 except for numbers between 10 and 20.

Notes

Separate multiple patterns with spaces. Commas are not allowed as separator characters.