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(readme from original devel4 release)
Changes since the first version 4 release:
- coordinate system is now standard; this requires modifying existing .wld
files and .fig files! See coords.doc for details.
- fixes for Sega timing problems
- support for customizing the Sega interface (see world.doc for details)
- support for loadable device drivers for video displays and pointing devices
- support for a "configuration file" (see demo4.doc for details)
- support for a REND386 environment variable (see demo4.doc for details)
- bugs in '*' and 'v' fixed
Changes since the third release:
- support for splits and areas to help with visibility problems
- simple pseudo-multitasking
- support for multiple representations of an object based on size/distance
- support for single-vertex polys, displayed as single points on-screen
- support for a simple "world description" file format
- new function: walk_objlist()
- objects now keep track of what objlist they're on; therefore:
- remove_from_objlist() no longer takes an objlist as its first parameter,
but now returns the objlist the object was on before it got removed
- next_in_objlist(), prev_in_objlist(), is_first_in_objlist() and
is_last_in_objlist() no longer take an objlist as their first parameter
- copy_obj function removed (should be at a higher level)
- object_bounds() renamed to get_object_bounds()
- seg_get_rep() and seg_set_rep() have been renamed to seg_get_appearance()
and seg_set_appearance(), to avoid confusion with multiple object reps
- high-resolution timer routines
- fast horizon-drawing (note that there's a bug in the horizon-drawing that
causes the ground to extend past the window boundary if the window is less
than full-screen; this will be fixed in the next release)
- faster palette loading, so faster startup
- smarter joystick handling
This package consists of:
read.me -- the file you are now reading
demo4.exe -- the demo program itself
demo4.doc -- documentation on using the demo
plg.doc -- documentation on the .plg file format
figure.doc -- documentation on figure files
colors.doc -- documentation on assigning of colors
world.doc -- documentation on the world file format
splits.doc -- documentation on the use of splits for visibility
logo.pcx -- a logo that can be used by demo2.exe
sega.txt -- a circuit description for interfacing to the Sega glasses
plus various data files (.plg, .fig, .wld)
For more details, see demo4.doc.
For a snazzy demo, demo4 room4.wld. You can use a joystick or the cursor pad
to move around.
That's it.