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Code Issues 157 Wiki Activity

perf(physics): air flowing along a pipe wakes the physics of a coupled vehicle only when it changes its pressure by more than physics.pipewake (0.001 bar), not with any trickle of it

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Hirek
2026-10-23 19:30:21 +02:00
parent 9a7ff372f7
commit 2f96dfe767
5 changed files with 39 additions and 8 deletions
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30
McZapkie/Mover.cpp
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@@ -4720,6 +4720,20 @@ void TMoverParameters::UpdatePipePressure(double dt)
// Q: 20160713
// Aktualizacja ciśnienia w przewodzie zasilającym
// *************************************************************************************************
namespace
{
// whether the air flowing to a coupled vehicle along a pipe wakes its physics: any flow did, but a vehicle standing next to one
// whose physics is on gets a trickle of it all the time, as their pressures settle, and each wake kept it on for 5 s. with
// Global.physics_pipewake only a flow which brings its pressure, with what has flown in while it slept, that much away from the
// pressure of the vehicle the air comes from
bool pipe_wakes(double const Flow, double const Pressure, TReservoir const &Pipe)
{
if (Flow * Flow <= 0.00000000000001)
return false;
return (Global.physics_pipewake <= 0.f) || (std::abs(Pressure - Pipe.P_pending()) > Global.physics_pipewake);
}
} // namespace
void TMoverParameters::UpdateScndPipePressure(double dt)
{
if (ScndPipePress > 1.0)
@@ -4744,18 +4758,18 @@ void TMoverParameters::UpdateScndPipePressure(double dt)
{
c = Couplers[0].Connected; // skrot
dv1 = 0.5 * dt * PF(ScndPipePress, c->ScndPipePress, Spz * 0.75);
if (dv1 * dv1 > 0.00000000000001)
c->switch_physics(true, wake_cause::scndpipe);
c->Pipe2->Flow(-dv1);
if (pipe_wakes(dv1, ScndPipePress, *c->Pipe2))
c->switch_physics(true, wake_cause::scndpipe);
}
// sprzeg 2
if (Couplers[1].Connected != nullptr && TestFlag(Couplers[1].CouplingFlag, ctrain_scndpneumatic))
{
c = Couplers[1].Connected; // skrot
dv2 = 0.5 * dt * PF(ScndPipePress, c->ScndPipePress, Spz * 0.75);
if (dv2 * dv2 > 0.00000000000001)
c->switch_physics(true, wake_cause::scndpipe);
c->Pipe2->Flow(-dv2);
if (pipe_wakes(dv2, ScndPipePress, *c->Pipe2))
c->switch_physics(true, wake_cause::scndpipe);
}
if (Couplers[1].Connected != nullptr && Couplers[0].Connected != nullptr && TestFlag(Couplers[0].CouplingFlag, ctrain_scndpneumatic) && TestFlag(Couplers[1].CouplingFlag, ctrain_scndpneumatic))
{
@@ -4832,18 +4846,18 @@ double TMoverParameters::GetDVc(double dt)
{ //*0.85
c = Couplers[0].Connected; // skrot //0.08 //e/D * L/D = e/D^2 * L
dv1 = 0.5 * dt * PF(PipePress, c->PipePress, Spg / (1.0 + 0.015 / Spg * Dim.L));
if (dv1 * dv1 > 0.00000000000001)
c->switch_physics(true, wake_cause::mainpipe);
c->Pipe->Flow(-dv1);
if (pipe_wakes(dv1, PipePress, *c->Pipe))
c->switch_physics(true, wake_cause::mainpipe);
}
// sprzeg 2
if (Couplers[1].Connected != nullptr && TestFlag(Couplers[1].CouplingFlag, ctrain_pneumatic))
{
c = Couplers[1].Connected; // skrot
dv2 = 0.5 * dt * PF(PipePress, c->PipePress, Spg / (1.0 + 0.015 / Spg * Dim.L));
if (dv2 * dv2 > 0.00000000000001)
c->switch_physics(true, wake_cause::mainpipe);
c->Pipe->Flow(-dv2);
if (pipe_wakes(dv2, PipePress, *c->Pipe))
c->switch_physics(true, wake_cause::mainpipe);
}
// if ((Couplers[1].Connected != NULL) && (Couplers[0].Connected != NULL))
// if ((TestFlag(Couplers[0].CouplingFlag, ctrain_pneumatic)) &&