Most models converted with PolyTrans are "render ready",
meaning that little or no tweaking of the data is necessary in the target
rendering program before a quality image can be rendered. Lights,
cameras, geometry, hierarchy and materials are converted. In addition,
PolyTrans goes even one step further by matching the
texture projection methods and all texture mapping parameters of the
input and output file formats, wherever possible.
For example, when
importing Lightwave/Softimage and exporting 3ds Max, the import converter will
convert Lightwave's/Softimage's planar, cylindrical, spherical and cubic texture
projection methods into equivalent (u,v) texture coordinates understood
by 3ds Max as well as mapping the diffuse, specular and other texture
modulation methods into equivalent texture modulation methods of
3ds Max (including all parameters such as texture wrap toggles,
intensity values and on/off toggles). The translations have all been
verified with Okino's NuGraf
software which has served as the intermediate database into which files are imported and from
which files are exported - thus ensuring a proper match between import
and export file formats.
A good example
of this "render ready" capability is PolyTrans' DEM converter (USGS format); this converter
reads in satellite-scanned digital elevation data distributed by the U.S.
Geological Society. During the conversion process the DEM converter
massages the DEM input data into multiple sub-objects of 900 polygons
each (for faster interactive camera movement), sub-samples the large DEM
dataset into a more manageable size (120000 polygons down to 16000 polygons
is typical), computes smoothing information for the polygons (vertex
normals), adds default 2d u/v texture coordinates (so that texture maps
can be overlaid on the data), optionally centers the data at the origin,
then adds and orients a default camera to the scene which will create a pleasing
image of the DEM data when rendered. This is quite typical of most of the
import converters in PolyTrans --> just convert and render!
As an example of how one file can be converted into many file formats with
the same geometry, vertex normals, material assignments, material properties
(color, specular highlight), camera viewing orientation and lighting, the
following images show how PolyTrans can be used to convert a Lightwave file
(our mascot "apeBot" model, copyright Matt McDonald, VSI, Inc. and Newtek, Inc.)
into a number of other file formats for immediate "load and render" (click on
images to see larger version):