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Hirek193
d0306f3d4a
The horn never reached anybody else. It is not a command a bystander can carry out: OnCommand_hornlowactivate sets MoverParameters->WarningSignal from inside a cab, and a peer that is not sitting in that cab has no TTrain for the vehicle, so the command was dropped on arrival. Only the result of it can travel, and it was not being sent. The vehicle state now carries what a vehicle is heard and seen doing rather than only what it is being told to do: the horn flags, the emergency brake horn and its alarm chain, the wheel revolutions and the engine revolutions. The last two are what turn the driven wheels and set the engine note, so somebody else's locomotive no longer sounds and looks like it is standing still while it rolls past. The state also goes out a little sooner, every sixth frame instead of every tenth: a horn can be pressed and let go inside a couple of frames, and an update that arrives after it is over is no use.
76 lines
2.5 KiB
C++
76 lines
2.5 KiB
C++
/*
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This Source Code Form is subject to the
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terms of the Mozilla Public License, v.
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2.0. If a copy of the MPL was not
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distributed with this file, You can
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obtain one at
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http://mozilla.org/MPL/2.0/.
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*/
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#pragma once
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#include <cstdint>
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#include <string>
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#include "network/entities.h"
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namespace network
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{
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// layout of the snapshot container. a reader refuses a blob it does not understand
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constexpr uint32_t SNAPSHOT_VERSION = 3;
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// the sections a snapshot is built from. a reader skips over any id it does not know,
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// which is what makes the format extensible: a peer built before a section existed can
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// still read a newer snapshot and simply ignores what it has no use for
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enum snapshot_chunk : uint16_t
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{
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// tick, clock, weather and (in a full snapshot) the state of the random engine
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SNAPSHOT_SESSION = 1,
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// where every vehicle is, what its controls and appliances are set to, and what its
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// brakes are doing
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SNAPSHOT_VEHICLES = 2,
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// who is working which vehicle
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SNAPSHOT_CREWS = 3,
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// contents of the memory cells - this is what signalling reads
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SNAPSHOT_MEMCELLS = 4,
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// which way the switches are thrown
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SNAPSHOT_SWITCHES = 5
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};
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// what a peer is meant to do with the blob it received
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enum class snapshot_mode
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{
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// the peer is coming in cold and takes the world as it is given
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join,
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// routine correction on top of a simulation that is already running
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correction
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};
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struct snapshot_result
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{
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bool ok{false};
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// how far the worst vehicle was from where the authority says it is
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double worst_position_error{0.0};
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uint32_t vehicles{0};
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uint32_t repositioned{0};
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};
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// packs the state of the world. only ever called on the authority.
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// a full snapshot carries everything and is what a joining peer gets; otherwise only what
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// has changed since the last one goes out, which is what keeps the routine correction
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// stream small
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// OwnedOnly limits it to the trains this peer runs itself and leaves out everything that
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// is not a vehicle; that is what a client sends upstream about its own train
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std::string take_snapshot(bool Full, bool OwnedOnly = false);
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// restores state handed to us. vehicles this peer runs itself are never touched - their
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// physics is the authority, not the other way round. Owner, when given, limits the update
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// to the trains that peer is entitled to move, so a client cannot shove anybody else's
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snapshot_result apply_snapshot(std::string const &Blob, snapshot_mode Mode, PeerId Owner = PEER_NONE);
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// forgets what was last sent, so that the next delta comes out complete
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void reset_snapshot_history();
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} // namespace network
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