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Reduce server CPU consumed by occlusion culling. (#13260)

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Cache blocks already occluded at a specific distance. The RemoteClient typically visits the same distance multiple time - especially at larger distances, so this saves significant CPU from recalculating the occlusion state of blocks.
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lhofhansl 2023-03-05 21:33:41 -08:00 • committed by GitHub
parent 9ef3c8ce38
commit 1f0d042377
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2 changed files with 23 additions and 4 deletions
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12
src/clientiface.cpp
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@ -328,8 +328,15 @@ void RemoteClient::GetNextBlocks (
continue;
}
/*
Check occlusion cache first.
*/
if (m_blocks_occ.find(p) != m_blocks_occ.end())
continue;
if (m_occ_cull && !block_not_found &&
env->getMap().isBlockOccluded(block, cam_pos_nodes)) {
m_blocks_occ.insert(p);
continue;
}
}
@ -395,8 +402,11 @@ queue_full_break:
}
}
if (new_nearest_unsent_d != -1)
if (new_nearest_unsent_d != -1 && m_nearest_unsent_d != new_nearest_unsent_d) {
m_nearest_unsent_d = new_nearest_unsent_d;
// if the distance has changed, clear the occlusion cache
m_blocks_occ.clear();
}
}
void RemoteClient::GotBlock(v3s16 p)