Fix loading qagame so on GNU/Linux - #2
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This saves ~0.34% (~1KiB), of traffic and demo size for a ~3-minute match with 4 players, by sending less data when a player or a dead body is seen by another player for the first time in a while. This will increase the size of the initial connection message (`svc_gamestate`, which now needs to send the entities for which we set the baseline state), but it pays off in the long run. How to test this change: 1. `./quake +set cg_autoRecordDemo 1 +set jorunal 1` to record a jorunal file and a demo. 2. Play a game. 3. Build the mod with this patch and install the mod. 4. `./quake +set cg_autoRecordDemo 1 +set jorunal 2` to play back the journal file and record another demo given the very same inputs. Then compare the demo sizes. One can also utilize `cl_shownet 3`. Below is an example of how the "delta from baseline" entries look on vanilla Quake. First two player entries, then two body queue entries: ``` 50: baseline: 2 51: ec-#2 pos.trBase[0]:1024 pos.trBase[1]:1000 pos.trBase[2]:24 apos.trBase[1]:27 eType:1 torsoAnim:11 legsAnim:22 groundEntityNum:1022 pos.trType:1 eFlags:4 weapon:2 clientNum:2 angles[1]:90 apos.trType:1 solid:4200463 (418 bits) 70: baseline: 5 71: ec-#5 pos.trBase[0]:216 pos.trBase[1]:1328 pos.trBase[2]:24 eType:1 torsoAnim:11 legsAnim:22 groundEntityNum:1022 pos.trType:1 eFlags:4 weapon:2 clientNum:5 angles[1]:360 apos.trType:1 solid:4200463 (398 bits) 23: baseline: 65 24: ec-#65 pos.trBase[0]:678 pos.trBase[1]:1446 pos.trBase[2]:24 apos.trBase[1]:135 eType:1 torsoAnim:3 legsAnim:3 groundEntityNum:1022 eFlags:1 clientNum:3 (278 bits) 46: baseline: 66 47: ec-#66 pos.trBase[0]:894 pos.trBase[1]:832 pos.trBase[2]:-15 apos.trBase[1]:225 eType:1 torsoAnim:5 legsAnim:5 groundEntityNum:1022 eFlags:1 clientNum:1 (279 bits) ``` As you can see, basically every field is transmitted, including e.g. `eType`, which is almost always `ET_PLAYER` for players and dead bodies. Now let's see how this patch makes it look: ``` 33: baseline: 3 35: ec-#3 pos.trBase[0]:1024 pos.trBase[1]:1000 pos.trBase[2]:24 apos.trBase[1]:90 eventParm:10 legsAnim:22 angles[1]:90 (255 bits) 84: baseline: 5 86: ec-#5 pos.trBase[0]:1028 pos.trBase[1]:1094 pos.trBase[2]:24 apos.trBase[1]:107 angles2[1]:7 legsAnim:22 eFlags:4 angles[1]:90 (284 bits) 23: baseline: 64 24: ec-#64 pos.trBase[0]:698 pos.trBase[1]:1460 pos.trBase[2]:24 apos.trBase[1]:135 (149 bits) 22: baseline: 65 24: ec-#65 pos.trBase[0]:471 pos.trBase[1]:807 pos.trBase[2]:-15 apos.trBase[1]:315 torsoAnim:3 legsAnim:3 (208 bits) ``` This is much shorter. Sometimes we even don't transmit anything but coordinates and angles. I have tested this on Quake3e and ioq3 engine. The latter still has a bug in `SV_CreateBaseline` which never sends entity numbered 0. But this doesn't cause anything game-breaking, only that this optimization will not be applied to entity 0.
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qagamex86_64.so doesn't load on GNU/Linux due to vmMain not being exported.