<<<<<<<<<<<<<<<<<mcubes_writer(display) Display mcubes_writer(display)
NAME
mcubes_writer - write display data objects (or compatible
filters) to Marching Cubes file
DESCRIPTION
Mcubes_writer writes a Marching Cubes file from display
data. Marching cubes is an algorithm for generating iso-
surfaces from 3D volume (or hexahedral cell data). The
output of Marching Cubes is a set of triangles - hence the
mcubes_writer only can write triangle data. (General
polygons and triangle strips can be converted using triangle_filter.)
The marching cubes file format is as follows. Each triangle is independently defined as three points plus three
point normals. The binary file format for each triangle
is:
x-y-z coordinate values (first point) (3 4-byte floats)
nx-ny-nz normal values (first point) (3 floats)
x-y-z coordinate values (second point)(3 floats)
nx-ny-nz normal values (second point) (3 floats)
x-y-z coordinate values (third point) (3 floats)
nx-ny-nz normal values (third point) (3 floats)
(Each triangle totals 18 floats (72 bytes)). The data
repeats for each triangle. (Hence shared vertices must be
duplicated.)
SUPERCLASS
data_writer
INSTANCE VARIABLES
(inherited from superclasses)
MESSAGES
(see superclasses)
write! method that performs the writing of data to Marching Cubes form.
SEE ALSO
data_writer, sla_writer, byu_writer, data_iso_surface,
mcube, triangle_filter
Please send comments and suggestions toconsult@rpi.edu