Describe SHAPEFILES here.
SHAPE.TXT is the main shape model that all of SPC uses. The first line is the Q size (between 8 and 512 in factor of 2 increments: 8, 16, 32, 64, 128, 256, 512). The shape is in the ICQ format, which is basically a 6 sided cube.
Each subsequent line gives the vector of the surface. Bob has made a new routine (equalize) that helps distribute the vectors evenly. The vectors are in Cartesian space (x, y, z)
{{{
512
-278.04003 278.04003 268.57872
-276.88948 278.59369 269.11354
-275.73912 279.14388 269.64501
-274.58894 279.69061 270.17314
-273.43898 280.23391 270.69794
-272.28923 280.77377 271.21943
-271.13971 281.31022 271.73763
-269.99043 281.84328 272.25255
-268.84141 282.37296 272.76420
-267.69265 282.89927 273.27260
...
}}}