Graviton by Julian Scott Version 1.3


Revision history:

Saturday Jan 31 1998 
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 Started it off, got map going , got poly sprite system functional
 plan to do pixel perfect collision on backgrounds: with read-pixel poly plot
 or point-inside poly function
 for sprite-sprite collsion, I will use box-box or circle-circle test
 for small sprite(ie bullet) to sprite collision I will use point in box or circle test

Sunday Feb 01 1998
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 Incorporated generic object plotter functions and data structure, for both 
  polys and bitmap sprites
 implemented poly-poly collision for ship vs background,
 implemented sprite-sprite radius collision for bullets, pickups, etc

Monday Feb 02 1998
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 implemented point in poly collision for bullets, small things, etc. vs background 
 put first level map in place
 implemented options screen (sort of)
 implemented game control. now fully playable

Tuesday Feb 03 1998
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Put in bullet-enemy collision, and bullet firing, gravity options
Added radial attractor and detractor fields

Wednesday Feb 04 1998
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Created 3D package object file converter for creating maps

Thursday Feb 05 1998 (my birthday)
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 Allow moving scenery, controled by a sprite
 Homing missiles
 Gridded off backgrounds for faster collision

Monday Feb 09 1998
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 Major (x2) speedup on poly plot. (was previously using generic -ie slow- plotter)
 Added rudimentary sound controler
 Added starfield for impression of movement in open spaces

Tuesday Feb 10 1998
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Fixed exiting-back-to-app-screen bug (on all my programs)

Wednesday Feb 11 1998
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Refining some stuff

Thursday Feb 12 1998
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Fixed minor collision bug
Implemented scoring, and bonuses

Friday Feb 13 1998
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Implemented Huffman compression for titles and level data, etc.
Came accross nightmarish problem. I assumed I had plenty of memory
to work with, ie I thought I could allocate scratchpad memory from anywhere
on the system. But it seems I only have 32k to work with, and I can only get 
13k of this ? Anyway, I just about squeezed a dump buffer in there. I am disappointed!
Added falling rocks
Added more secret bonuses

Monday Feb 16 1998
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Tidied title screens, added help screen
Added path following creatures

Tuesday Feb 17 1998
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Fixed level advance bug (whoops)

Wednesday Feb 18 1998
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Received a lot of comments from people who's Pilots I
am crashing. It seems to be when HackMaster stuff is installed!
Fixed crash with AppHack.- it was my fault-in PlotStars, add.l d2,a1, without clearing d2 top word!
Just luck that it didn't crash without AppHack installed.
Testing with lots of HackMaster extensions now- seems OK
Added Gravity field bombarders- like wind machines
Added arrow pointer to nearest crystal
Added lives - 3 lives per game
Added beter sound player

Thursday Feb 19 1998
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Added crystals that run away from you - you have to be sneaky
Added fade / wipe engine
Made level data slightly smaller - more to do
also optimised poly sprite data
added transporters- kill you if they are closed, shoot them to open

Monday Feb 23 1998
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Added somthing that you shoot to move it around- you have to move it
 into it's receptical to generate a crystal
Further optimised level data - saved 200-300 bytes per level
Added volcanoes
Added pause mode
Added some crystals that defend themselves!!

Monday Feb 23 1998
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Added level passwords

Tuesday Feb 24 1998
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Compressed all levels (now under 64k)
Did level complete screen
quit to menu from pause with buttons 0 and 3 together
Doesn't reset level when you lose a life
Slightly relaxed ship-map collision. (it was pixel perfect, but as the walls are stippled,
 it LOOKED like you weren't colliding when in fact you were.)
Tidied up for beta relese

Wednesday Feb 25 1998
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Added Save hiscore and preferences feature

Saturday Feb 28 1998
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Added key remap and variable start lives


Friday March 6th 1998
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That's it. Final 1.0 released. Only poly clipping to fix now

Friday March 13th 1998
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Made stars disappear behind polys- masked poly edges.
Slight optimization

Monday March 16th 1998
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Made textured walls


Wednesday April 8th 1998
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Changed to new sound player code
fixed occasional 'random collision' bug

Monday  March 4th 1999
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Added Palm IIIx and Palm V compatability