TMoverParameters::BrakeForceR() halves the force of a vehicle set to R
below 40 km/h. That is one approximation for every distributor, but a
NESt3/ESt4 distributor with a rapid relay engages the step above 70 km/h
and keeps it down to 50 km/h (TNESt3::GetPF, RapidStatus), and below
that its cylinder pressure is divided by the relay's own multiplier
(TRapid, RapidMult). For a vehicle braking from speed the full force
therefore lasts down to 50 km/h, not 40. The AI builds its consist brake
table (fBrake_a0/a1) from BrakeForceR(), so between 40 and 50 km/h it
expected twice the force the wagons actually deliver.
Add TBrake::GetRapidRatio(), which keeps the old approximation as the
default, and override it in TNESt3 with the relay's threshold and
multiplier. The brake itself is unchanged; only the prediction is.
TNESt3::GetPF() is a *major* hotspot in simulation state update. The leading cause is the use of typeid (RTTI) which is implemented in the C++ runtime essentially as a string compare. This change eliminates the use of typeid and instead caches statically typed pointers for the few TPrzekladnik subclass objects that need their parameters adjusted in TNESt3::GetPF(). As a bonus some virtual methods on TPrzekladnik can now be removed. Overall this change reduces the TNESt3::GetPF() contribution from about 25% to 16%.
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