Nyall Dawson 709c14391b Change expression help from free form html files to structured json
A new script then parses these json help files into the html help
contents, in a standardised manner. Previously, the function help
was a bunch of different formats and structures.

Now, a custom stylesheet can be applied (and later tweaked!) to
format these help. Eg, this commit colors variables and function
names in the syntax section for greater readability.
2015-09-02 14:22:50 +10:00

10 lines
603 B
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{
"function": "convex_hull",
"description": "Returns the convex hull of a geometry. It represents the minimum convex geometry that encloses all geometries within the set.",
"arguments": [ {"arg":"geometry","description":"a geometry"}],
"examples": [ { "expression":"geom_to_wkt( combine( geom_from_wkt( 'LINESTRING(3 3, 4 4, 5 5)' ), geom_from_wkt( 'LINESTRING(3 3, 4 4, 2 1)' ) ) )", "returns":"MULTILINESTRING((4 4, 2 1), (3 3, 4 4), (4 4, 5 5))"},
{ "expression":"geom_to_wkt( convex_hull( geom_from_wkt( 'LINESTRING(3 3, 4 4, 4 10)' ) ) )", "returns":"POLYGON((3 3,4 10,4 4,3 3))"}
]
}