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Add physics version

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This commit is contained in:
Miloslav Ciz 2025-03-04 16:06:58 +01:00
parent ad8baef113
commit 5c8e4c4c2b
3 changed files with 44 additions and 8 deletions
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40
racing.h
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@ -17,9 +17,17 @@
because the offset is too big (input didn't change for more than 2^12
frames), there must simply be inserted an extra word that just copies the
current input state.
- Replay text format: first there is the name of the map terminated by ';',
then hexadecimal hash of the map follows (exactly 8 characters), then
blank character follows, then achieved time as a series of decimal digits
- Physics engine version: LCR_RACING_VERSION1 and LCR_RACING_VERSION2 define
a two-character version string of this module that determines compatibility
of replays. Whenever a change is made to this module that changes the
behavior of physics, the version string must be changed because replays
will stop being compatible. It's still possible to make other changes to
this module (such as optimizations or comments) without having to change
physics version.
- Replay text format: first there are two characters saying the physics
engine version, then immediately the name of the map terminated by ';', then
hexadecimal hash of the map follows (exactly 8 characters), then blank
character follows, then achieved time as a series of decimal digits
expressing the physics frame at which the run finished, then the replay
data, i.e. the series of 16 bit words in hexadecimal, each preceded by ':'.
The events (but nothing else) may otherwise be preceeded or followed by
@ -30,6 +38,9 @@
typedef int32_t LCR_GameUnit; ///< abstract game unit
#define LCR_RACING_VERSION1 '0' ///< first part of physics eng. version
#define LCR_RACING_VERSION2 '0' ///< second part of physics eng. version
#define LCR_GAME_UNIT 2048 ///< length of map square in LCR_GameUnits
#define LCR_RACING_INPUT_FORW 0x01
@ -174,6 +185,9 @@ void LCR_replayOutputStr(void (*printChar)(char))
const char *s = LCR_currentMap.name;
printChar(LCR_RACING_VERSION1);
printChar(LCR_RACING_VERSION2);
while (*s)
{
printChar(*s);
@ -225,11 +239,23 @@ void LCR_replayOutputStr(void (*printChar)(char))
int LCR_replayLoadFromStr(char (*nextChar)(void),
uint32_t *mapHash, uint16_t *nameHash)
{
char c = ' ';
char c;
LCR_racing.replay.eventCount = 0;
LCR_racing.replay.achievedTime = 0;
// has to be like this to force correct evaluation order:
c = nextChar() == LCR_RACING_VERSION1;
c |= (nextChar() == LCR_RACING_VERSION2) << 1;
if (c != 3)
{
LCR_LOG1("wrong physics version");
return 0;
}
c = ' ';
if (nameHash)
*nameHash = _LCR_simpleStrHash(nextChar,';');
else
@ -243,7 +269,10 @@ int LCR_replayLoadFromStr(char (*nextChar)(void),
c = nextChar();
if (_LCR_hexDigitVal(c) < 0)
{
LCR_LOG1("wrong hash");
return 0;
}
if (mapHash)
*mapHash = ((*mapHash) << 4) | _LCR_hexDigitVal(c);
@ -275,7 +304,10 @@ int LCR_replayLoadFromStr(char (*nextChar)(void),
break;
if (LCR_racing.replay.eventCount >= LCR_SETTING_REPLAY_MAX_SIZE)
{
LCR_LOG1("replay too big");
return 0;
}
LCR_racing.replay.events[LCR_racing.replay.eventCount] = e;
LCR_racing.replay.eventCount++;