The ASCII input should contain blocks of information, where each block consists of a number indicating how many vertices will be contained in the polyline and then a series of XYZ points, with one for each vertex. The format of the input ASCII file is illustrated below :
number of vertices in first connected polyline X value Y value Z value X value Y value Z value X value Y value Z value . . . . . . . . . X value Y value Z value number of vertices in second connected polyline X value Y value Z value . . . . . . . . .
A single connected polyline primitive will be created for each successive block of information. The resulting geometry will not contain any color data. To create colored polyline segments, please see "glinecolor."