https://github.com/bhouston/3dmaskdemo1997

Real-Time 3D Texture Bump Reflection Mapping on a Mask. 16-bit DOS, Demo Scene 1997
https://github.com/bhouston/3dmaskdemo1997

computer-graphics demoscene dos

Last synced: about 1 year ago
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Real-Time 3D Texture Bump Reflection Mapping on a Mask. 16-bit DOS, Demo Scene 1997

• Host: GitHub
• URL: https://github.com/bhouston/3dmaskdemo1997
• Owner: bhouston
• Created: 2014-12-06T22:55:56.000Z (over 11 years ago)
• Default Branch: master
• Last Pushed: 2014-12-15T16:28:29.000Z (over 11 years ago)
• Last Synced: 2025-03-14T20:49:19.506Z (about 1 year ago)
• Topics: computer-graphics, demoscene, dos
• Language: C
• Homepage: https://benhouston3d.com
• Size: 301 KB
• Stars: 14
• Watchers: 2
• Forks: 3
• Open Issues: 0
• Metadata Files:
  • Readme: README.TXT

Awesome Lists containing this project

README

          

     Phong-Texture-Bump Readme

     Ben Houston [ plash / AZuRe ]

     Friday, March 14, 1997

     e-mail: 'bhouston@geocities.com'

     Here is the results of my first attempt at phong texture

bump mapping.  I'm moving from BC4/TASM to Watcom and my next

engine won't be so limited as this thing.  Although this engine

is fairly limited it is fairly fast because of the fixed point

math, fast polygon tracer and dirty rectangle animation.  You

will find alot of weird things in this source because I started

to run out of space in the data segment and I had to reuse

portions of it.  Let me tell you that phong-texture-bump is not

ment to be done under 540 kb using a small memory model in 16 bit

real mode.

     To learn about some of the techniques used in this source it

would be best to read other people's work that is more suited to

learning from.  The texture mappers used are all based on a doc

called FATMAP.TXT written by MRI.  The fixed point rotation is

based on Rex Deathstar's EMPHONG4 archive.  Rex also has an

example of how to enviroment map and it the technique on which my

source is based.  The bump mapping method is my own as well as

the phong map calculations. The phong palette calculations are

not totally correct but fairly close. The technique used to

bumpmap causes bumps to appear larger then perpendicular to the

viewer than when the bump is facing the viewer

head on.  The distortion has to do with the non uniform phong

map. Most of the code was written when I had way too much coffee

so please ingore that the libraries are called "nothing comes

close" (NCC) ;).

     Enjoy the code, if you do use it give credit or your

plagerizing (taking credit for work that's not your own).  I'm

always happy to get mail discussing techniques or whatever.  By

the way I am looking for one talented musician to help with a

major big demo.

     PS. I've added reflective metal shading and plastic phong

shading jsut for the fun of it.  The inner loops of almost all

the triangle drawers are totally shit!  I'm moving to Watcom so

there is no point optimizing realmode code.  Real mode sucks shit

and I'm done with it!!!

     PPS. I Want Greets Too!

What's in the archives I hear you ask?

azr_ptb2.zip             main archive

     readme.txt          this file

     ptb_bin2.zip        archive containing working demo

          ptb_demo.exe   the demo executable (small eh?)

          azure.raw      background (320x200)

          bumpmap.raw    star heightmap (256x256)

          texture.raw    star texture (256x256 32clr)

          texture.pal    texture palette (32 clrs used)

          refmap.raw     metal reflection map (grayscale)

          mask.vtx       vertices for object

          mask.nrm       vertex normals for object

          mask.fct       facet indices for object

          mask.txr       vertex texture coord for object

     ptb_scr2.zip        archive containing all source code :)

          ptb_demo.cpp   main c++ source for demo

          ncctypes.h     types header for ncc library

          nccgraph.*     graphics functions

          ncctri.*       alot of triangle drawers

          ncccolor.*     palette quantization

          nccmisc.*      just simple crap

          azr_ptb.ide    project file for Borland C++ 4.0

Greetz:

     Mundane - in no particular order.  Asch - that girl has

driven me insane.  Olivier - am i bothering you? xyz - try to use

some sentence structure :).  TimJ/Vertigo - a guy who know's his

phong.  Phantasm - how goes the engine?  Cyclone - object

orientation overload  (And the guy that kindly uploaded this).