contextCount function (context query)

Syntax

• float contextCount(target, label)

Parameters

1. target—selector
   • intra—Checks against labeled shapes in the same shape tree (i.e. from the same inital shape).
   • inter—Checks against labled shapes in other shape trees (i.e. generated by other initial shapes in the neighborhood).
   • all—Checks both intra and inter.
2. label—string
   The context query is performed only on shapes that match the requested label. Must not be empty. If the label is empty, 0 is returned.

Returns

The number of shapes with the given label. If no shape is found matching the specified label, 0 is returned.

Description

The contextCount function is a context query that returns the number of shapes with the specified label in the environment.

Note:

• Learn more about important characteristics for context queries in conditions and inter context.
• Each label operation does not "label" the current shape but rather creates a new labeled shape that is counted separately.

Related

• Context and occlusion queries
• contextCompare function
• minimumDistance function
• label operation

Examples

In this example the Lot rule is applied to a single initial shape (intra context). Depending on the size of the shape a different number of tiles is generated by the split operations. The contextCount query is used to color the tiles according to the total number of shapes with label "Tile". Lot --> split(x) { ~1 : Split }* Split --> split(z) { ~1 : Tile }* Tile --> label("Tile") Color Color --> case contextCount(intra, "Tile") <= 9 : color(0,1,0) else : color(1,0,0)