Function: intplines

Syntax

intplines (<pointsA>,<pointsB> {,<num>} )

Type

point

Returns

The intersection points of two polylines, defined by point vertices.

Parameters

• <pointsA>
  Points defining the vertices of the first polyline.

• <pointsB>
  Points defining the vertices of the second polyline. If this is an empty array then intersections between <pointsA> and itself are found.

• <num>
  A nearness tolerance used during point comparison, if omitted the default is 0.0000001.

Resulting intersection points are ordered as they occur along the first polyline.

Examples

Define 2 polylines interactively, then compute their intersection points.

entity pl1 = lines {pseries -rub}
entity pl2 = lines {pseries -rub}
point xs[] = intplines(pl1.vertex,pl2.vertex)

Define a polyline interactively, then compute any crossover points.

entity mypoly = lines {pseries -rub}
point xs[] = intplines(mypoly.vertex,<>)

See Also