Rules 12, 13 and 15 were suggested by my warped mind, so here are some explanations:
Gray wrote:
re 12: I think 'lighter load' should only refer to difficulty settings, after all, the number of cars is set by the level author and changing it changes the way the level has to be solved
A real bridge works at any load up to the rated maximum. A bridge that fails for a train that's lighter than specified (less cars, lower difficulty) is not clean.
I would (barely) allow specifying a maximum train length, such that a train that's lighter but longer would be forbidden to cross the bridge, too.
re 13: So compressed, 'buckled' cables only result from the exaggerated visuals of the game, those cables are not compressed IMO.
I am not talking about buckling cable, that is a relistic phenomenon, although not commonly found on real bridge types.
On my drawbridge, the cable that hangs down from the counterweight bumps down on the ground in a most unrealistic way. I think that bump compresses it (though it's so slight I haven't been able to make it out). Since cables are modelled as sticks joined together, they can be compressed if the force acts axially or on just one of the sticks. This is unrealistic and should be considered dirty.
re 14+15: Define 'steep'....
A real railway line in Europe does not incline by more than 1% or so (haven't checked this, anybody who knows exact numbers is very welcome!). There may be some tracks in the Andes that have steeper slopes, I'm not sure.
Dropping 1 HD unit on 8 is a 12.5% slope. If that was a road, you'd see a warning sign posted!
The only way to explain this is to say that Pontifex compresses the X dimension (much like model railways do) by some factor, and differently for the train and the tracks (that's why the train has so few cars, a car probably stands for 5 real cars). Unless this explanation is adopted by the "clean bridge commitee", all sloping deck in Pontifex is unrealistic.
after all, why is the player allowed to build decks at any angle in complex mode?
After all, why is the player allowed to do all the things you're deeming dirty? That argument is hollow.
Very few 'clean' (loosely defined at the moment...) record briges have a level deck now.
You are arguing by precedent, set by the self-appointed record keepers (good job, guys!); it amounts to "this is the way we've always done it" and avoids further justification.
Such a restriction would severely limit the scope of possible designs the player has at his proposal for every given level.
As does any "clean" rule you adopt.
IMO, No. 2, 4, (and 14+15) should be allowed for certain levels
As mentioned on One-way Bridges, maybe the levels that require breaking these rules should be considered "dirty". In my opinion, if a clean solution can't be found, a clean record does not exist. Leave that spot in the record table empty. If you're not expicitly stating which rules can be broken for that level, confusion might result.
VRBones wrote:
In my mind, slanted deck is a bug. Not because it is unrealistic, but it appears incorrectly in the designer section, therefore unintended by CL.
Could be a bug in the "edit" mode? If you go by CLs intentions, the whole discussion is moot, because you'd then simply adopt the contest policy for the clean records.
Chillum wrote:
(along with 12, 13, 14, and 15 - scrub those).
He killed my babies!
My suggestion is that in the description of the bridge, the designer states the rules that govern a clean score, possibly with respect to some published framework, which means we should adopt some "Clean Rules V1.0" (Chillum's list is a good start), and the designer could then say "Clean V1.0 except 12-15", or "Clean V1.0, only 3a".
Btw, I would have some special rules to add to such a framework concerning budget and width editing, even land editing.