TobyLobster

I've improved the BBC Micro version of Jet Set Willy. The disk image and description of my changes are here https://github.com/TobyLobster/jsw2021
Play in a browser: http://bbc.godbolt.org/?autoboot&disc=https://raw.githubusercontent.com/TobyLobster/jsw2021/main/JSW.ssd
(Previously I improved Manic Miner for the Beeb, see https://github.com/TobyLobster/ManicMiner2021)
 

View File JetSet Willy 2021
A greatly updated and enhanced BBC Micro version of Jet Set Willy, without any loss of the quirks and charms of the original Spectrum version on which it was based.
Some of the updates and changes from the original BBC Micro release include:
* More colours on screen.
* More authentic colour choices.
* More tuneful.
* New font.
* Corrected room and sprite definitions.
* Arrows and ropes together again.
* Uses the RETURN key for jump.
* *Watch Tower* crash bug fixed.
* Arrow rendering bug fixed.
* Player start position fixed.
* Works on the Master series.
 
The .zip in the download contains the ssd (single sided disc image) of the game and a text file "readme.txt" covering changes in more detail.
 
Control Keys:
Z = Left
X = Right
RETURN = Jump

Q = Disable In-Game Music
S = Enable In-Game Music
SHIFT+ESCAPE = Quit current game
SPACE = Start a new game (on title screen)
Submitter TobyLobster Submitted 07/23/2021 Category Jet Set Willy [Remakes]  

Thanks IRF, very interesting. That's an interesting quirk of the implementation. There's some deeply knowledgable people here it seems!

Oooh, that's good to know thank you. I've updated the document to remove my incorrect guess.

Thanks IRF, very interesting. That's an interesting quirk of the implementation. There's some deeply knowledgable people here it seems!

The quirks relating to the jumps referred to above in JSW occur because, in each increment of a jump cycle, Willy is moved vertically before the check is made as to whether there is a standonable cell underneath him.  (Logically, you might expect the check to be made before the move.)  Then horizontal motion is dealt with later in the jump cycle: if Willy is about to pass horizontally into the next pair of cell-columns, there is a check for solid blocks immediately ahead of him, and if not then he is moved sideways.  The net result means that he can fall down into solid blocks during the descent of a sideways jump at a certain angle, especially if there is a solid wall to the right of his head (which 'guides' him into the situation, as per the approach to The Chapel).
The combination of the above also means that he can't jump sideways into a channel between solid blocks, so Matthew fudged that by removing the check for head-height solid blocks to Willy's left only.  That fudge allows him to access the items in the left-hand side of the Wine Cellar, which would otherwise be unreachable (and also to jump back over the barrel in Ballroom East after returning from the top of Front Door.  In a laterally inverted game, Willy lands on the floor where he is supposed to in the approach to The Chapel, but the Wine Cellar is impossible to complete.

I have now ( with thanks to @TobyLobster ) submitted the file here now too.
Download > https://jswmm.co.uk/files/file/148-jetset-willy-2021/
Discussion Topic (auto generated by a new submission) > https://jswmm.co.uk/topic/623-file-jetset-willy-2021/
🙂
 

View File JetSet Willy 2021
A greatly updated and enhanced BBC Micro version of Jet Set Willy, without any loss of the quirks and charms of the original Spectrum version on which it was based.
Some of the updates and changes from the original BBC Micro release include:
* More colours on screen.
* More authentic colour choices.
* More tuneful.
* New font.
* Corrected room and sprite definitions.
* Arrows and ropes together again.
* Uses the RETURN key for jump.
* *Watch Tower* crash bug fixed.
* Arrow rendering bug fixed.
* Player start position fixed.
* Works on the Master series.
 
The .zip in the download contains the ssd (single sided disc image) of the game and a text file "readme.txt" covering changes in more detail.
 
Control Keys:
Z = Left
X = Right
RETURN = Jump

Q = Disable In-Game Music
S = Enable In-Game Music
SHIFT+ESCAPE = Quit current game
SPACE = Start a new game (on title screen)
Submitter TobyLobster Submitted 07/23/2021 Category Jet Set Willy [Remakes]  

reference  TobyLobster/jsw2021    from GitHub
Quote:-
Documenting the Remaining Minor Differences
The jump parabola shape is very slightly different (while still being the same height and length overall) since the code seems to have problems with odd numbers of pixel height changes within the jump. This makes only a few minor changes overall: Nomen Luni: On the BBC you can jump from the top of the slope, under the Moon enemy to land on the platform under the ledge. On the Spectrum you have to jump to the lower platform first. The Bow: to jump up from the platform next to the wheel item needs two platform tiles instead of just one. Top Landing: Jumping into the Chapel area lands on the top level of flooring not the tiles below as on the Spectrum. The Forgotten Abbey: The platform under the item should be a wall, but changing this means the player can't fall down past it, trapping them at the top of the room. All the differences above match what is seen in the Spectrum's JSW II, so I imagine the jump parabola there matches the BBC version. A correction to the above statement- highlighted in red. JSW II uses the correct parabolic data. The reason -The Bow-, has two blocks instead of one in JSW II is the consequence of JSW checking the wrong blocks. This also causes the bug of passing into floors when jumping in -the First landing- going towards -the Chapel-.  The code in JSW does not handle the double crossing of block edges, when entering a new block diagonally. That is when it moves both vertically and horizontally across a block boundary. This also is the reason why JSW II can clear the wall in the Garden and the same move is impossible with the code of JSW. 
 

Oooh, that's good to know thank you. I've updated the document to remove my incorrect guess.

Yes, it always bothered me when you couldn't run straight through from right to left through both Kitchens. It was a toss up whether to 'fix' The Swimming Pool, but as the code was already there to do it I thought that was maybe better to preserve it than to lose it.

I've improved the BBC Micro version of Jet Set Willy. The disk image and description of my changes are here https://github.com/TobyLobster/jsw2021
Play in a browser: http://bbc.godbolt.org/?autoboot&disc=https://raw.githubusercontent.com/TobyLobster/jsw2021/main/JSW.ssd
(Previously I improved Manic Miner for the Beeb, see https://github.com/TobyLobster/ManicMiner2021)
 

In case it is useful, this looks like it's a pretty industrial strength solver for Travelling Salesman and related problems, written in C http://www.math.uwaterloo.ca/tsp/concorde/index.html

In case it is useful, this looks like it's a pretty industrial strength solver for Travelling Salesman and related problems, written in C http://www.math.uwaterloo.ca/tsp/concorde/index.html

Now playable in an online BBC Micro emulator (no download required):
http://bbc.godbolt.org/?autoboot&disc=https://raw.githubusercontent.com/TobyLobster/ManicMiner2021/main/NEWMINER.ssd
Keys are: Z,X for left/right and RETURN to jump. Q turns off the music, S resumes music.

Thanks. There's no YouTube video yet. I'm hoping someone makes one for me so I don't have to 🙂 Both JSW and JSW II are available for the BBC Micro and are pretty good versions already.
Toby

Looks good to me 🙂

View File Manic Miner 2021
A greatly updated and enhanced version of the original BBC Micro Manic Miner.
Changes and improvements include:
Fast
Flicker free player movement
Fixes to cavern layouts, graphics, and colours
Better air bar and colours
Fixed the shape of the jump to match the Spectrum
Better collision detection
Better music
High Score is shown
'GAME OVER' added
Master compatible
 
The .zip in the download contains the ssd (single sided disc image) of the game and two text files:
> A simple 'read_me" explaining a little bit more about the game
> A 'tech_notes' file covering the updates in more detail.
 
Control Keys:
Z = LEFT
X = RIGHT
RETURN = JUMP
Q = MUSIC OFF
S = MUSIC ON
PAUSE = DELETE
RESUME = COPY
Submitter TobyLobster Submitted 04/19/2021 Category Manic Miner [Remakes]  

Looks good to me 🙂

View File Manic Miner 2021
A greatly updated and enhanced version of the original BBC Micro Manic Miner.
Changes and improvements include:
Fast
Flicker free player movement
Fixes to cavern layouts, graphics, and colours
Better air bar and colours
Fixed the shape of the jump to match the Spectrum
Better collision detection
Better music
High Score is shown
'GAME OVER' added
Master compatible
 
The .zip in the download contains the ssd (single sided disc image) of the game and two text files:
> A simple 'read_me" explaining a little bit more about the game
> A 'tech_notes' file covering the updates in more detail.
 
Control Keys:
Z = LEFT
X = RIGHT
RETURN = JUMP
Q = MUSIC OFF
S = MUSIC ON
PAUSE = DELETE
RESUME = COPY
Submitter TobyLobster Submitted 04/19/2021 Category Manic Miner [Remakes]  

That would be fine - go for it!

That would be fine - go for it!

I've improved the BBC Micro version of Manic Miner, and written up the changes I've made. https://github.com/TobyLobster/ManicMiner2021

I've improved the BBC Micro version of Manic Miner, and written up the changes I've made. https://github.com/TobyLobster/ManicMiner2021

I've improved the BBC Micro version of Manic Miner, and written up the changes I've made. https://github.com/TobyLobster/ManicMiner2021