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- OCTOBER 1993
-
- This is version 1.0 of RRTRACER for the IBM, an easy to use ray tracing
- program.
- Requires a 386,486 with a VGA card
- Pictures generated can be saved as 640 x 480 16 colour PCX files.
- The following file needs to be in the same subdirectory as RRTRACER.EXE
- for the program to run: (They are in included in the ZIP files)
- GFABAS03.OVL 386
- GFABAS73.OVL 386 with 387 or a 486
-
- RRTRACER is written in GFA BASIC for DOS. I originally wrote this program
- for the ATARI ST which had a very nice graphic user interface which
- GFA BASIC for ATARI used very well. I converted this for the IBM with
- minor changes, mostly to deal with the different resolutions.
-
- Pictures can be reviewed with any 16 colour PCX viewer. I have included
- a simple viewer PCXVIEW in the zip files.
-
- GENERAL OPERATION
-
- The opening screen presents you with a side view and top view of an empty
- room. You then proceed to add objects and lights in this space.
- You can give the objects the properties of colour, reflectivity and/or
- transparency.When you are happy with the scene you proceed to generate
- the 3-D ray tracing.
- This may take a long time - up to a few hours. The more objects,reflections
- and transparency the longer it takes. But the result is worthwhile. You
- can ask for a small preview picture to be produced beforehand in a shorter
- time to check the overall look of the tracing.
-
- NOTES ON REFLECTIONS
-
- Reflectivity is adjusted by a slider, values 0 (matte) to 8.
- If you want a total mirrored look, eg. a steel ball, you set the colour
- to black, and the reflectivity to 8
-
- NOTES ON COMPOSITE OBJECTS
- You can make a composite object out of overlapping objects. The only
- exceptions are you cannot overlap transparent objects and you cannot have
- a light source inside an object or fatal error occurs.
-
-
- NOTES ON COLOURS
-
- The VGA is restricted to 16 different colours on the screen at one time.
- To ensure realistic image colouring involving reflections and transparency
- I have restricted the palette to shades of one colour (red or green or blue)
- and shades of grey and mixtures thereof.
-
-
- NOTES ON THE MENU
-
-
- FILE - NEW starts a new room and erase anything done so far
- ADD - add a sphere,light,floor,ceiling,wall,solid cylinder,hollow cylinder
- cone, or cuboid.
- Maximum 20 objects, 3 lights
- REMOVE - Remove anything added so far
- OPTION - DEEP PERSPECTIVE - makes vanishing points closer
- VIEW FROM ABOVE - view scene from an angle above
- LEFT/RIGHT - view scene from an angle left/right
- LOW AMBIENT LIGHT - no complete shadows
- HIGH AMBIENT LIGHT - hardly any shadows at all
-
- EDIT - Edit any parameters of objects added so far
- - PALETTE - change colours of standard palette
-
- GO - START - Start the ray tracing process.
- - XYZ - If this option is checked before START a screen is
- displayed allowing you to modify the x,y,z coordinates
- of the objects and lights in the picture. This is useful
- for lining objects up vertically or for making composite
- objects. The floor is at y=-34.4, ceiling y=+34.4
- back wall z=-398.1, left wall x=-47.4, right wall
- x=+47.4
-
-
- RRTRACER IS SHAREWARE. IF YOU LIKE THIS PROGRAM PLEASE SEND $15 TO
-
- CLIVE PROBERT
- 250 SPRINGDALE BLVD
- TORONTO, ON
- M4C1Z9
- CANADA
- 416 425 6011
-
- I CAN ALSO BE CONTACTED ON GENIE AS C.PROBERT
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