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Code Issues Activity

better sync client/server block state

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p2r3
2025-08-18 01:25:28 +03:00
parent d27b085ae5
commit 1be62beca8
6 changed files with 106 additions and 59 deletions
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33
src/tools.c
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@@ -14,6 +14,7 @@
#include "registries.h"
#include "varnum.h"
#include "packets.h"
#include "worldgen.h"
#include "tools.h"
static uint64_t htonll (uint64_t value) {
@@ -298,17 +299,47 @@ uint8_t getBlockChange (short x, short y, short z) {
void makeBlockChange (short x, short y, short z, uint8_t block) {
// Transmit block update to all managed clients
for (int i = 0; i < MAX_PLAYERS; i ++) {
sc_blockUpdate(player_data[i].client_fd, x, y, z, block);
}
// Calculate terrain at these coordinates and compare it to the input block.
// Since block changes get overlayed on top of terrain, we don't want to
// store blocks that don't differ from the base terrain.
ChunkAnchor anchor = {
x / CHUNK_SIZE,
z / CHUNK_SIZE
};
if (x % CHUNK_SIZE < 0) anchor.x --;
if (z % CHUNK_SIZE < 0) anchor.z --;
anchor.hash = getChunkHash(anchor.x, anchor.z);
uint8_t is_base_block = block == getTerrainAt(x, y, z, anchor);
// Look for existing block change entries and replace them
// 0xFF indicates a missing/restored entry
for (int i = 0; i < block_changes_count; i ++) {
if (block_changes[i].block == 0xFF && !is_base_block) {
block_changes[i].x = x;
block_changes[i].y = y;
block_changes[i].z = z;
block_changes[i].block = block;
return;
}
if (
block_changes[i].x == x &&
block_changes[i].y == y &&
block_changes[i].z == z
) {
block_changes[i].block = block;
if (is_base_block) block_changes[i].block = 0xFF;
else block_changes[i].block = block;
return;
}
}
// Don't create a new entry if it contains the base terrain block
if (is_base_block) return;
block_changes[block_changes_count].x = x;
block_changes[block_changes_count].y = y;
block_changes[block_changes_count].z = z;