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- ┌─────────┬────────────────────────────────┬───────────────────────────────┐
- │ Name: │ LPARSER │ (C) RenderStar Technology BV. │
- ├─────────┼────────────────────────────────┼──────────┬───────┬────────────┤
- │ Author: │ Laurens J. Lapre │ Version: │ 3.0 │ 1994-01-31 │
- ├─────────┴────────────────────────────────┴──────────┴───────┴────────────┤
- │ RenderStar Technology BV, Keizersgracht 448 │
- │ 1016 GD Amsterdam, the Netherlands │
- │ Fax (+31) 20 622 4939 │
- ├─────────┬─────────────────────┬───────────────────┬──────────────────────┤
- │ Email: │ 2:283/203.8 fidonet │ 'Lj Lapre' PCGnet │ ljlapre@hacktic.nl │
- └─────────┴─────────────────────┴───────────────────┴──────────────────────┘
-
-
- First a quick look ...
- ────────────────────────────────────────────────────────────────────────────
- Do 'go lsys00' and use the cursorkeys to move the form around. You can use
- the go batch file with any of the .ls files. Press ESC to get back to dos.
-
-
- About L-systems ...
- ────────────────────────────────────────────────────────────────────────────
- An l-system is a rule like description of a 3d form. It contains
- descriptions of parts and how they should be assembeld together. The program
- reads a l-system description in and processes it into a 3d form which can
- then be outputed in several formats, including DXF and POV.
-
- The description is applied to itself a number of times (= recursion levels)
- so fractal and recursive forms are very easy to describe in an l-system.
- That's why they are used a lot for plants and natural looking organic forms.
- By increasing the recursion level the form slowly 'grows' and becomes more
- complex.
-
- This implementation of a l-system parser also allows 'mutations' to take
- place during the growing of the form. These mutations can change the form
- slightly or quite dramaticly. This allows you to create a form once and then
- create a whole series of forms all clearly 'descendant' from the original
- l-system.
-
- Too help people get started a lot of example l-systems have been included.
-
-
- Where is what ...
- ────────────────────────────────────────────────────────────────────────────
- The file LPARSER.TXT documents the options of the lparser which generates and
- mutates the form.
-
- The file LVIEWER.TXT explains the keys you can use in the lviewer, which
- allows you to see the form, and the other file formats it can readin.
-
- The file LV2POVID.TXT contains explainations how to get a form with a
- selected viewport into a scene file for a raytracer (POV, VIVID, BOB)
-
-
- For those who lparsed before, changes and additions in v3.0 ...
- ────────────────────────────────────────────────────────────────────────────
- Speedup of the lparser. Forms which used to take up to an half hour to
- generate are now parsed in couple of seconds ! This makes much larger and
- complexer l-systems posible and workable. Much higher recursions levels are
- now also attainable. A number of extra, much larger and lifelike, tree
- sample files based on ABOP have been worked out and included.
-
- Values can have some randomness automaticly added to them. Using ~(xx)
- will now add a random direction component to the current orientation with
- maximum of xx in all three directions. This way you can mark at which
- locations in your l-system 'jitter' needs to be introduced. Using this option
- no two 'instances' of the same l-system will look the same.
-
- With the the new -i option you can use a connected 8 sided cylinder as a base
- shape. It will connect the bottom part of the cylinder to a previous top and
- can connect branches to the stem, creating a continous tube like element.
- This is meant to be used with polygonal plant and tree forms.
-
- The new -s option allows you to set the maximum size of the production string
- in Kbytes. This string has to be stored twice and is the main data
- structure. For a 4meg system the maximum will be about 1500 K. The default
- value is 1024 Kbytes (= 1 meg). This is to allow much larger strings to be
- processed on larger memory systems.
-
- The nested polygons concept from ABOP chapter 5 (page 127) has been added.
- This allows you to create complex 'shell' like forms consisting of faces. See
- bop10.ls and shell*.ls for examples.
-
- The new -f option in the lviewer allows you to startup with the main view
- directly. The side views will be skipped.
-
- The new [Q] key in the lviewer allows you to cycle the main view through all
- possible viewer setups.
-
-
- Automatic POV/VIVID/BOB output with LV2POVID in six easy steps.
- ────────────────────────────────────────────────────────────────────────────
- From the lv2povid.doc.
-
- 1) First start the Lparser program with a .ls file of your choice, be sure
- to use a small one. (fi TROPISM.LS) To do this, execute:
-
- lparser tropism
-
- 2) The program creates a 'output.vol' file for you, we will use it later.
- Now we need to get a POVRAY compatible output of the Lparser for the same .ls
- file, so try one of the following lines :
-
- lparser -v tropism
- lparser -bc tropism
- lparser -Bc tropism
-
- 3) 'Feed' the output.vol to the Lviewer program by typing:
-
- lviewer output
-
- 4) After the Lviewer has completed its startup screen, press [F1]. Now
- rotate, translate, zoom etc. the picture as desired, and if you have found a
- nice view, press [F1] again, and leaf the Lviewer (ESC). (remember to press
- at the start of the lviewer AND after you've found your viewport)
-
- 5) The output.pov or output?.inc or output.inc file(s) and the info.txt
- file should be in the same directory as the Lv2povid.exe program. Type
-
- lv2povid 2
-
- and press [Enter]. Lv2povid will create a POVRAY v2.0 compatible scene file
- for you, called 'Lpar2pov.pov'. Rename it as desired.
-
- 6) Now 'feed' it to POVRAY v2.0, than try an other one and more and more
- and..
-
-
- Lparser images on Internet FTP site
- ────────────────────────────────────────────────────────────────────────────
-
- Host wuarchive.wustl.edu
- Location: /graphics/graphics/ray/pov-dkb-archive/incoming/ljlapre
- FILE -rw-r--r-- 733 Dec 19 08:45 lp1.txt
- FILE -rw-r--r-- 1145684 Dec 19 08:45 lp1.zip
- FILE -rw-r--r-- 1579 Dec 19 08:46 readme.txt
- FILE -rw-r--r-- 358852 Dec 19 06:50 lsys__38.gif
- FILE -rw-r--r-- 65402 Dec 19 06:51 lsys__43.gif
- FILE -rw-r--r-- 121766 Dec 19 06:52 lsys__55.gif
- FILE -rw-r--r-- 242348 Dec 19 06:55 lsys__58.gif
- FILE -rw-r--r-- 190143 Dec 19 06:57 lsys__60.gif
- FILE -rw-r--r-- 83608 Dec 19 06:58 lsys__64.gif
- FILE -rw-r--r-- 126423 Dec 19 07:00 lsys__67.gif
- FILE -rw-r--r-- 249785 Dec 19 07:02 lsys__69.gif
- FILE -rw-r--r-- 176486 Dec 19 07:06 lsys__70.gif
- FILE -rw-r--r-- 363202 Dec 19 07:10 lsys__72.gif
- FILE -rw-r--r-- 53064 Dec 19 07:12 lsys__73.gif
- FILE -rw-r--r-- 171792 Dec 19 07:46 lsys__74.gif
- FILE -rw-r--r-- 470543 Dec 19 07:51 lsys__75.gif
- FILE -rw-r--r-- 156342 Dec 19 08:48 tree__01.gif
- FILE -rw-r--r-- 228886 Dec 19 08:52 tree__07.gif
-
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