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- 11/19/95
-
-
- P O V 2 M D L
-
- Version 1.0
-
- POV-Ray 2.x to MORAY 2.x Converter
-
- by Thomas Baier
-
-
-
-
-
- Version 1.0 and later of POV2MDL are Shareware. Note that this
- program is fully functional.
-
-
-
- What does POV2MDL do?
-
- POV2MDL converts scene files from POV-Ray's POV to MORAY's MDL format.
-
-
- Introduction
-
- POV-Ray certainly belongs to the best raytracers and is freely
- available. The voluminous script language makes the realization of
- complex scenes with high image quality possible. Soon after the
- release of POV-Ray there were modellers available which supported
- graphical design of scenes. Certainly one of the first modeler
- is MORAY. For a lot of people it is one of the best POV-Ray modelers.
- Soon there was a request for a converter from POV-Ray to MORAY which
- would allow importing older, manually designed scenes.
- This is where the idea of POV2MDL was born. The program reads a
- POV-Ray scene file and converts it to the MDL format of MORAY.
-
-
- What do you need?
-
- minimum 386 Compatible PC
- DOS 3.3 or higher
- Windows 3.x or higher (Dos-Box)
- OS/2 2.x or higher (Dos-Box)
-
- POV-Ray V2.0/2.2 (optional)
- MORAY V2.0 or higher
-
- Copy the shipped files to a directory of your choice. Make sure
- that the program DOS4GW.EXE is available via the PATH variable.
- The DOS Extender is needed by POV2MDL and MORAY. Please use
- version 1.97 or higher.
-
-
- Files produced by POV2MDL
-
- POV2MDL generates a MDL file, which can be read by MORAY V2.x.
- Additionally a LOG file will be generated which contains warnings
- that might be issued during conversion.
-
-
- Running POV2MDL
-
- POV2MDL expects a filename as parameter in the commandline. The
- file should be a POV-Ray scene file in ASCII format.
-
- e.g.
-
- POV2MDL colors.pov
-
-
- After successfully reading the POV file, the MDL file will have
- been generated in the same directory (e.g. colors.mdl). Syntax
- errors in the POV file abort the conversion. Additionally a LOG
- file (e.g. colors.log) may exist which contains possibly issued
- warnings.
-
-
- POV-Ray Search paths
-
- The environment variable "POV_INC" contains additional searchpaths
- for include files.
-
- set pov_inc=c:\povray;d:\MORAY\scenes
-
- If an include file is not found during parsing, the conversion will
- still be continued, but any declarations in the include file will
- not be available. If these are referenced in a POV file, this will
- lead to a failure.
-
-
- What is supported
-
- The following POV-Ray objects are supported:
- Box Sphere Cone Cylinder
- Light_source CSG Heightfield Bicubic_Patch
- Torus Plane Disc Object
- Blob Texture Camera
-
- Bounding and clipping is not supported.
-
- The parser supports only POV-Ray 2.x syntax. POV-Ray 1.0 syntax is
- not supported. The exact syntax is described in POVRAY.DOC.
-
- The keyword "version" is totally ignored.
-
- All other objects and features of POV-Ray are ignored.
-
- If there is an object that is not convertable by POV2MDL, a short
- message will be written to the LOG file.
-
-
- Converting
-
- The transformations are a special topic during conversion. The
- syntax of POV-Ray accepts transformations (scale, rotate and
- translate) at several locations and in several orders. MORAY on
- the other hand accepts object and texture transformations only
- in a strict order (scale, rotate and then translate). This leads
- to some strangs effects after conversion.
-
- The surprise appears if a scale <a,b,c> follows a rotation. The
- conversion to the sequence scale, rotate, translate can not be
- made complete. The result in MORAY will not be what you expected.
- An additional shear vector would be helpful but is not yet
- implemented in POV-Ray or MORAY. If POV2MDL recognizes such a
- construction the message "Warning: Inaccurate Matrix Operation
- (Shear Vector) in Object xxx !" will be written to the LOG file.
- The problem does not appear when the scaling vector is of the
- form <a,a,a> (equal to 'scale a').
-
-
- Some hints
-
- If you have problems converting a scene, try to render the scene with
- POV-Ray. If POV-Ray has problems, the chances that POV2MDL will have
- problems, too. Conversely, if POV-Ray can render the file, POV2MDL will
- probably be able to read it, too. If not, I would appreciate hearing
- from you with a sample POV script showing the error. See the end of
- this file for ways to reach me.
-
- If you have problems with memory try this:
-
- put these 10 lines in to a file named NEW4G.VMC ...
-
- !.VMC file DOS4GW.EXE
- !This file shows the parameter values.
- minmem = 1024 At least 1024K bytes of RAM is required.
- maxmem = 8192 Uses no more than 8MB of phys. RAM
- !virtualsize = 32768 Swap file plus allocated memory is 32MB
- virtualsize = 16384 Swap file plus allocated memory is 16MB
- !To delete the swap file automatically when the program exits, add
- deleteswap
- !To store the swap file in a directory called SWAPFILE, add
- !swapname = c:\swapfile\dos4gvm.swp
-
- and on the DOS command-line enter this:
-
- set dos4gvm=@new4g.vmc [RETURN]
-
- This is from the DOS4GW - documentation and will increase the
- virtual memory for DOS4GW.
-
-
-
- For Techies
-
- POV2MDL is written entirely in C++. The parser was developed with
- Lex&Yacc, a class library manages all POV-Ray objects. The parser
- engine is absolutely independent from any MORAY modules and could
- be used for a wide variety of tasks.
- For example the POV-Ray syntax could be easily enlarged by some
- elements for animation. Nevertheless the output can be pure
- POV-Ray code.
-
- Every converter from POV-Ray to XXX is conceivable ..., but makes
- no sense, because I am not aware of other modelers or raytracers
- that follow the rules and have the features POV-Ray has (except
- POLYRAY).
-
- All known modelers for POV-Ray are very strict in using
- transformations. The work for a converter is very hard, and I am
- not sure it is worth it. The converter could not support all
- features of POV-Ray.
-
-
- Thanks to
-
- Bernhard Baier
- Lutz Kretzschmar (MORAY)
- Erkki Sondergaard (POV-Team)
- Lex van der Sluijs (GUM)
- Andreas Lagotzki (RR)
-
- The future
-
- Further I have a POV-Ray to RAW converter in mind. First ideas are
- in my drawer.
-
-
- If you find a strange situation
-
- If you have a scenery or object that is not convertable in the
- right way, or you find a bug or some strange behaviour, please
- send me a letter or e-mail with the scene file and an error
- description.
-
- Thanks.
-
-
- Use of POV2MDL
-
- You are welcome to make copies of this program and pass them on
- to friends or post this program on bulletin boards or distribute
- it via disk catalog services provided the entire distribution is
- included in its original, unmodified form. A distribution fee may
- be charged for the cost of the diskette, shipping and handling.
- However, POV2MDL may not be sold, or incorporated in another
- product that is sold, without the permission of Thomas Baier.
-
- You are welcome to contact the author:
-
- Thomas Baier
- Ammerseestr. 9
- 85551 Kirchheim
- Germany
- Internet: thbaier@ibm.net
- Compuserve: 100527,3011 or GO GRAPHDEV
-
-
- Both the POV2MDL program and documentation are Copyright (c) 1995
- by Thomas Baier. You are not authorized to modify the program.
- "POV2MDL" is a trademark.
-
-
- Registration
-
- If you enjoy this program, use it frequently, and can afford to
- pay a registration fee, then send $15 to my address above.
- Please include your name and mailing address.
- With this contribution you help me improve POV2MDL. With registration
- you can expect a prompt response on questions or bugs. Thanks.
-
- Disclaimer
-
- POV2MDL is provided "as is" without warranty of any kind, either
- expressed or implied. This program may contain "bugs" and
- inaccuracies, and its results should not be assumed to be correct
- unless they are verified by independent means. The author assumes
- no responsibility for the use of POV2MDL and will not be
- responsible for any damage resulting from its use.
-
-
- Trademarks
-
- OS/2 is a trademark of IBM
- Windows is a trademark of Microsoft
- DOS is a trademark of Microsoft
- POV-Ray is a trademark of the POV-Team
- MORAY is a trademark of SoftTronics, Lutz + Kretzschmar
-
-
- History
-
-
- Version 0.5
- - syntax error with declared color_maps fixed
-
- Version 0.4
- - some bugs fixed
- - blobs added
- - camera
-
- Version 0.3
- - some bugs fixed
- - bug in CSG - transformations fixed
- - very old (!) bug in heightfield fixed
-
- Version 0.2
- - first Beta
-
-