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fix wrong relative coordinates when fetching terrain

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p2r3
2025-08-31 01:39:00 +03:00
parent ad1baee937
commit d6138616a4
1 changed files with 10 additions and 3 deletions
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13
src/worldgen.c
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@@ -415,7 +415,7 @@ uint8_t buildChunkSection (int cx, int cy, int cz) {
for (int j = 0; j < 16; j ++) {
anchor_index = (j / CHUNK_SIZE) + (i / CHUNK_SIZE) * (16 / CHUNK_SIZE + 1);
ChunkAnchor *anchor_ptr = chunk_anchors + anchor_index;
chunk_section_height[j][i] = getHeightAtFromAnchors(j % 8, i % 8, anchor_ptr);
chunk_section_height[j][i] = getHeightAtFromAnchors(j % CHUNK_SIZE, i % CHUNK_SIZE, anchor_ptr);
}
}
@@ -425,6 +425,7 @@ uint8_t buildChunkSection (int cx, int cy, int cz) {
// since all of the operations are on multiples of 8
int y = j / 256 + cy;
int rz = j / 16 % 16;
int rz_mod = rz % CHUNK_SIZE;
feature_index = (j % 16) / CHUNK_SIZE + (j / 16 % 16) / CHUNK_SIZE * (16 / CHUNK_SIZE);
anchor_index = (j % 16) / CHUNK_SIZE + (j / 16 % 16) / CHUNK_SIZE * (16 / CHUNK_SIZE + 1);
// The client expects "big-endian longs", which in our
@@ -433,8 +434,14 @@ uint8_t buildChunkSection (int cx, int cy, int cz) {
for (int offset = 7; offset >= 0; offset--) {
int k = j + offset;
int rx = k % 16;
uint8_t height = chunk_section_height[rx][rz];
chunk_section[j + 7 - offset] = getTerrainAtFromCache(rx + cx, y, rz + cz, rx, rz, chunk_anchors[anchor_index], chunk_features[feature_index], height);
// Combine all of the cached data to retrieve the block
chunk_section[j + 7 - offset] = getTerrainAtFromCache(
rx + cx, y, rz + cz,
rx % CHUNK_SIZE, rz_mod,
chunk_anchors[anchor_index],
chunk_features[feature_index],
chunk_section_height[rx][rz]
);
}
}