home *** CD-ROM | disk | FTP | other *** search
- .so psroff.inc # Include the macros needed for output to Postscript
- .TH Export-trueSpace
- .SH NAME
- exp_true \- trueSpace geometry export filter
- .SH SYNOPSIS
- .PP
- This man page describes the options specific to the trueSpace geometry
- export converter.
- .PP
- .SH EXAMPLE CONVERSION SYNTAX
- .PP
- To convert a 3D Studio file to trueSpace using the default parameters listed
- in the setup.ini file:
- .IP
- pt -i 3ds -o true filename.3ds
- .PP
- To convert a Lightwave file to trueSpace and override some of the default
- options in setup.ini:
- .IP
- pt -i lw -o true -out-true-autofacet-angle = 20 filename.lw
- .PP
- .SH OVERVIEW
- .PP
- The trueSpace geometry export converter writes out a trueSpace 2.0 compatible
- object file, complete with all geometry and material attributes. A file
- exported to trueSpace should render almost exactly as whence the file
- originated (ie: a 3D Studio file exported to trueSpace should render almost
- exactly the same as it would in 3D Studio).
- .PP
- The following geometry information is output to the file:
- .IP
- N-sided polygon geometry with recursive holes.
- .IP
- Texture (u,v) coordinate data.
- .IP
- All hierarchy information.
- .IP
- All pivot point information for each object.
- .PP
- In addition, complete trueSpace materials are output to the file including:
- .IP
- Surface color, ambient shading coefficient, specular shading coefficient,
- opacity value, highlight size and index of refraction.
- .IP
- Spherical environment maps, texture maps and bump maps (including the
- (u,v) offset and scaling parameters).
- .PP
- .SH COMMAND LINE OPTIONS
- .PP
- The following options are specific to this export converter:
- .TP
- -o true
- This is the mandatory command line option which specifies that the data
- is to be exported using the trueSpace format converter.
- .TP
- -out-true-autofacet-angle = <angle>
- This angle determines the cut-off angle between abutting polygons which are to
- appear smooth and those that are to appear faceted. The default is 40 degrees.
- Higher values will make the geometry appear more smooth regardless of how
- angular the data may be whereas smaller values will make the data appear more
- faceted. To change this value within trueSpace enable the 'Inspect Face'
- mouse option, click on an object, then in the 'shader/maps' modeless dialog
- box right click on the 'autoFacet' icon (middle button on the left side).
- .PP
- .SH Limitations
- .PP
- The trueSpace file format is rather limiting compared to most 3d binary file
- formats and as such this limits how much information can be output to the trueSpace
- file:
- .IP
- trueSpace does not really have a 'diffuse Intensity' shading parameter.
- Instead, trueSpace makes the diffuse intensity the inverse (more or less) of
- the specular shininess parameter. This is very limiting when exporting complex
- materials (such as from 3D Studio) to trueSpace. Thus, this export filter
- overcomes this problem by multiplying the inverse of the current database's
- diffuse shading coefficient into the specular shading coefficient before being
- output to trueSpace. This allows the diffuse or specular components to dominate,
- but not both.
- .IP
- trueSpace can only read in bitmap files which use the BMP, Targa or JPEG file formats.
- If any of the exported texture filenames use a different file format than these then
- the export converter will automatically change the file's extension to .tga (Targa format).