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-
-
- RayLab 1.1 for Amiga
-
-
- (c)1995-1996 by Marcus Geelnard
-
-
- Introduction:
- -------------
-
- RayLab was mostly developed on an Amiga 3000 with gcc 2.7.0 (some testing
- and coding was done on a mighty DEC Alpha, with gcc/cc). Gcc has proven to
- produce smaller and faster (in most cases) executables than SAS/C (which
- was used to compile RayLab 1.0). Thus the executables that come with the
- Amiga distribution of RayLab 1.1 were compiled with gcc 2.7.0.
-
-
- Requirements:
- -------------
-
- RayLab needs AmigaOS 2.0 or better to work, partly because of the new
- display-routines that require kickstart v36 or higher to work, but also
- because gcc does not support AmigaOS 1.x (why should it?). I think that
- this will be no limitation to the majority of potential RayLab users (?).
- If you would need a compilation for older versions of the AmigaOS though,
- either compile RayLab on your own, keeping in mind that the display
- routines will not work, or contact me, and I'll do my best.
-
- Other requirements? I have run RayLab on an Amiga 500 with kickstart 37.175
- and 512KB Chip + 512KB Slow memory, one disk-drive only (no hd). It worked!
- It was even over four times faster than a 386SX-20MHz running Windows!
-
- Please note that the stack needs to be set quite high for RayLab to work
- properly. I use a stack-size of 50000, which seems to work well. RayLab
- refuses to run if the stack is less than 40000.
-
-
- Contents:
- ---------
-
- The Amiga distribution of RayLab contains the following:
-
- · Two executables: raylab000 - for all Amigas (68000 or better)
- raylab881 - for Amigas with 68020+ and an FPU
-
- · The documentation for RayLab:
- raylab.doc - a plain ascii version of the documentation
- raylab.guide - a comprehensive amigaguide-formatted version, with
- some graphical figures (requires MultiView)
- amiga.doc - (this file)
-
- · Sample RayLab scenes and some texture-images to go along with them.
-
- · The sourcode for RayLab, including the Amiga specific code, a makefile
- for gcc and one for SAS/C 6.x, and the generic code/makefile for any
- platform.
-
-
- Installation:
- -------------
-
- You may already have installed RayLab, if you are reading this. Otherwise,
- this is what you need to do: Extract all files from the RayLab lha-archive
- to a proper place on your harddisk (e.g. Work:Graphics/RayTracing/). If
- you have extracted the files to a temporary directory (e.g. RAM:), simply
- drag-and-drop the RayLab drawer icon to where you want it on your harddisk.
-
- After installing the files to a proper place, you should rename the
- executable that you intend to use (raylab000 or raylab881) to 'raylab'.
- Some special features of the guide documentation requires this, and it is
- much easier to type 'raylab ...' than 'raylab881 ...', for instance.
-
- Also, it would be wise to create some new directories for your own use,
- especially one for your own scenes and one for pictures. For example:
-
- ..../RayLab/MyScenes/
- ..../RayLab/MyPics/
-
- This way it will be easier to keep track of your RayLab files.
-
- Before you use RayLab, please finish reading this doc. Then proceed to
- reading the full documentation. You can either choose to read the plain
- ascii version (raylab.doc) or the guide (raylab.guide), but I strongly
- recommend the latter one. The guide is sequential, so you can use the
- browse buttons to browse forward and backward in the documentation, which
- can be good the first time you read the doc, as you should really read the
- whole documentation to get to know how RayLab works. If you want to have
- the users documentation printed on paper, you can get the postscript
- version of the documentation, which is available at RayLabs home-page on
- the www and on Aminet under gfx/3d (or hopefully from where you got this
- archive).
-
-
- Amiga specific:
- ---------------
-
- Currently you will have to use RayLab from shell. RayLab was intended to
- be as portable as possible, and I frequently run it on a unix system (which
- is about 10000% faster than my A3000-28MHz) so I have not yet made any
- working GUI. I have tried to make one, but it will not be ready until the
- next release, at the best.
-
- The Amiga version of RayLab can display a picture as it is being rendered.
- To make it do so, use the -d flag on the command line when you are calling
- RayLab, or add the following to a globals section in your scene description
- (read 'raylab.doc' for more information):
-
- display x
-
- ...where x is the display-mode. These are the currently supported
- display-modes for the Amiga:
-
- 0 - No display (default)
- 1 - Chose display-mode from a requester
- 2 - Greyscale, hires, interlaced (dithered)
- 3 - HAM6, lowres, non-interlaced (dithered)
- 4 - HAM6, lowres, interlaced (dithered)
- 5 - HAM8, lowres, non-interlaced (non-dithered)
- 6 - HAM8, lowres, interlaced (non-dithered)
- 7 - HAM8, hires, non-interlaced (non-dithered)
- 8 - HAM8, hires, interlaced (non-dithered)
-
- (RayLab 1.0 users: Note the changes in display numbers!)
-
- If you forget the display-numbers (most likely) use the -l flag to list all
- available display-modes (the -l flag should work on all platforms, not just
- the Amiga).
-
- You can either choose one of the 'fixed' display-modes (2-8) which will use
- the standard monitor, or you can use the display requester (mode 1), from
- which you can choose just about any display-mode (e.g
- NTSC:Superhires-HAM8). If the mode you choose is not HAM, the display will
- be grey-scale (2-256 colors are supported for grey-scale). In the future
- RayLab will hopefully support CyberGraphics true color screens as well
- (which is one reason for the display-requester to be there).
-
- Please note that the HAM6 display is far from perfect (I can not tell
- anything about the HAM8 display, haven't got it :-( ), but the general idea
- is that it should only serve as a rought preview anyway.
-
- With the display turned on, the rendering will be slightly slower, but
- probably not enough for you to notice (a 320x240 HAM6 screen takes 20
- seconds on an Amiga 3000, as compared to some potential 10-60 minutes of
- computing).
-
- When the rendering is done, you are able to select 'Close' from a menu on
- the screen (by pressing the right mouse-button). This will close the
- display and exit RayLab. The menu will not appear until the picture is
- completed. If you did not open a display (or if RayLab was unable to open
- one), RayLab will just exit when it is done rendering.
-
- If you want to terminate RayLab during rendering, activate the shell-window
- from which you started RayLab (it is active by defult), and press CTRL-C.
- RayLab will then cleanup and exit gracefully. The output picture will be
- correct and viewable after a break if the output format is either iff or
- tga (this is a new feature introduced with RayLab 1.1), but you may not
- continue rendering the picture where you stopped rendering (that will be
- implemented in the future), so you will have to start it all over again.
-
-
- Compiling on your own:
- ----------------------
-
- If you would like to compile RayLab for the Amiga on your own, simply copy
- the Amiga specific code and the makefile(s) that you want to use from the
- source/platform/amiga directory to the source directory. Makefiles are
- available for both gcc and for SAS/C 6.x. Please refer to the makefile(s)
- for more information about compiling RayLab for different machines. Now
- you are on your own!
-
- Please note that you may not spread a new compilation of RayLab without my
- permission! This is to avoid misunderstandings about who is responsible
- for supporting the users of your compilation. Read 'raylab.doc' for
- further info about legal issues...
-
-