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- Short: Trees,Plants...from grammars(rayshade)
-
- README.AMIGA (2nd Version 12.93)
- =============
-
- - To compile Graphtal on the Amiga you need GCC-233, the os-includes
- and a lot of memory. (compilation without optimizer: about 6MB)
- Don't forget to set a large stack size (256000 is fine) !
- Because AmigaDOS isn't case sensitive you must edit string.h
- (for more information on this read the header of string.h)
- (NEW) Do also read the file IMPORTANT.README.AMIGA
-
- - Graphtal has a device for Rayshade output.
-
- - I have include some tools to convert PPM output to IFF24 in bin
- (to convert PPM output to IFF get the the PBM plus package)
-
- - Note: some examples for Graphtal need a lot of memory (over 10MB) !
-
- - Note: Graphtal needs the cpp to process the inputfile.
- (NEW) cpp and sh are now included in the directory Unix
-
- - GCC-233 and Rayshade are available by anonymous FTP in ftp.luth.se
- or any other Aminet site
-
- - (NEW) Note: setting the environment variable COLORFILE now works
- (see changes in file color.C)
-
- - (NEW) examples how to use graphtal can be found in the file EXAMPLE.SCRIPT
-
-
- Lucas Ammon (lammon@iamexwi.unibe.ch)
-
-
- DESCRIPTION
- graphtal is a tool for manipulating spT0L-systems (context
- free, table oriented L-systems with stochastic productions).
- graphtal reads a file containing an L-system description and
- starts the interpretation. In addition, graphtal is able to
- interpret the result graphically, producing different kinds
- of output.
-
- The main reference for the program is the book The Virtual
- Laboratory: The Algorithmic Beauty of Plants by P. Prusink-
- iewicz and A. Lindenmayer. The language used in graphtal is
- different from the one in the book and will be described
- completely in this document.
-
-
- DEVICE DRIVERS
- EXAMPLE DEVICE
- The example driver produces a ASCII dump of the primitives
- generated. It shows the easiest way to implement a driver.
-
- BBOX DEVICE
- The bbox driver computes the bounding box and gives a hint
- for the viewing parameters of the objects defined by the L-
- system description. This is useful for the flat device,
- which does no automatic view computations.
-
- LINE DEVICE (X11,AMIGA)
- This driver generates a simple line drawing of the object
- defined by the L-system. Line width, color, textures,
- spheres, macros and library object are not supported by this
- driver. Viewing parameters are automatically set, when none
- are provided by the user.
-
- WIRE DEVICE (X11,AMIGA)
- The wire device driver draws a more realistic image of the
- object than line device. Not supported are colors, textures
- and library objects. Viewing parameters are also set
- automatically, when none are provided.
-
- FLAT DEVICE
- The flat device works with a z-buffer algorithm, which is
- able to shade convex and concave polygons. Shading calcula-
- tions are done with regard to the light source located at
- the eyepoint. The driver does not depend on the number of
- polygons, therefore even very large scenes can be visual-
- ized. As a drawback of this feature, the viewing parameters
- have to be provided by the user (use BBOX DEVICE to calcu-
- late them). Textures and library objects are not supported
- by this driver. The output of the rendering process is an
- image in ppm format (portable pixmap).
-
-
- RAYSHADE DEVICE
- The rayshade device is the most complete of all the drivers.
- It generates output for the raytracer rayshade. The driver
- produces at least two output files:
-
- graphtal -d rayshade anExample.lsys
- generates the files default.ray and default.ray.def
-
- graphtal -d rayshade -O anExample.ray
- generates the files anExample.ray and anExample.ray.def.
-
- The file name.ray contains the options for the rendering
- process and in the name.ray.def file the geometric primi-
- tives are stored. For each macro definition, the rayshade
- driver produces it's own file with the name
- macrName.ray.def. If library objects are used, a file with
- the name libraryName.ray.lib must be provided by the user
- for each object.
-
-
- AUTHOR
- Christoph Streit (streit@iam.unibe.ch)
-
- AMIGA PORT
- Lucas Ammon (lammon@iamexwi.unibe.ch)
-
-
- COPYRIGHT NOTICE
- Copyright (C) 1992 Christoph Streit
-
- All rights reserved.
-
- This software may be freely copied, modified, and redistri-
- buted provided that this copyright notice is preserved on
- all copies.
-
- You may not distribute this software, in whole or in part,
- as part of any commercial product without the express con-
- sent of the authors.
-
- There is no warranty or other guarantee of fitness of this
- software for any purpose. It is provided solely "as is".
-