.d format is a seldom-used ASCII polygon file format which is
simpler than the
.poly format as it only has only two sections: POINTS
and POLYS. The
.d format has only moves and draws, where a move
signifies the beginning of a new polygon.
.d format is suitable for user-written programs that create
polygon information if you do not want to use the Houdini polygon
library. It can describe 2D or 3D lines and supports comments.
The standard syntax for a
.dfile is a set of commands.
.dfiles have one command per line.
The character in the first column (
d) specifies the command (move or draw). Commands are followed by white space, then a list of arguments delimited by whitespace.
Whitespace is any combination of tabs and space characters.
The arguments are floating point numbers.