From c6d54411056da2dd563015c9f90c4c5c0863bc71 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Lo=C3=AFc=20Blot?= Date: Sat, 3 Jun 2017 19:57:02 +0200 Subject: Properly remove SAO when worldedges are overtaken (#5889) * LuaEntitySAO: Remove beyond outermost mapchunk edges Based on a commit by, and with help from, nerzhul. Add 2 functions to class Mapgen: A function to calculate actual mapgen edges, called from the Mapgen constructor. A function called indirectly from content_sao.cpp per entity step to check SAO position is within mapgen edges. * Calculate borders from params not mapgen, which is not available everytime --- src/mapgen.cpp | 52 +++++++++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 51 insertions(+), 1 deletion(-) (limited to 'src/mapgen.cpp') diff --git a/src/mapgen.cpp b/src/mapgen.cpp index dfe413a71..1f7f98621 100644 --- a/src/mapgen.cpp +++ b/src/mapgen.cpp @@ -317,7 +317,6 @@ void Mapgen::updateHeightmap(v3s16 nmin, v3s16 nmax) heightmap[index] = y; } } - //printf("updateHeightmap: %dus\n", t.stop()); } inline bool Mapgen::isLiquidHorizontallyFlowable(u32 vi, v3s16 em) @@ -1049,3 +1048,54 @@ void MapgenParams::writeParams(Settings *settings) const if (bparams) bparams->writeParams(settings); } + +// Calculate edges of outermost generated mapchunks (less than +// 'mapgen_limit'), and corresponding exact limits for SAO entities. +void MapgenParams::calcMapgenEdges() +{ + // Central chunk offset, in blocks + s16 ccoff_b = -chunksize / 2; + + // Chunksize, in nodes + s32 csize_n = chunksize * MAP_BLOCKSIZE; + + // Minp/maxp of central chunk, in nodes + s16 ccmin = ccoff_b * MAP_BLOCKSIZE; + s16 ccmax = ccmin + csize_n - 1; + // Fullminp/fullmaxp of central chunk, in nodes + s16 ccfmin = ccmin - MAP_BLOCKSIZE; + s16 ccfmax = ccmax + MAP_BLOCKSIZE; + // Effective mapgen limit, in blocks + // Uses same calculation as ServerMap::blockpos_over_mapgen_limit(v3s16 p) + s16 mapgen_limit_b = rangelim(mapgen_limit, + 0, MAX_MAP_GENERATION_LIMIT) / MAP_BLOCKSIZE; + // Effective mapgen limits, in nodes + s16 mapgen_limit_min = -mapgen_limit_b * MAP_BLOCKSIZE; + s16 mapgen_limit_max = (mapgen_limit_b + 1) * MAP_BLOCKSIZE - 1; + // Number of complete chunks from central chunk fullminp/fullmaxp + // to effective mapgen limits. + s16 numcmin = MYMAX((ccfmin - mapgen_limit_min) / csize_n, 0); + s16 numcmax = MYMAX((mapgen_limit_max - ccfmax) / csize_n, 0); + // Mapgen edges, in nodes + // These values may be useful later as additional class members + s16 mapgen_edge_min = ccmin - numcmin * csize_n; + s16 mapgen_edge_max = ccmax + numcmax * csize_n; + // SAO position limits, in Irrlicht units + m_sao_limit_min = mapgen_edge_min * BS - 3.0f; + m_sao_limit_max = mapgen_edge_max * BS + 3.0f; +} + + +bool MapgenParams::saoPosOverLimit(const v3f &p) +{ + if (!m_sao_limit_calculated) { + calcMapgenEdges(); + m_sao_limit_calculated = true; + } + return p.X < m_sao_limit_min || + p.X > m_sao_limit_max || + p.Y < m_sao_limit_min || + p.Y > m_sao_limit_max || + p.Z < m_sao_limit_min || + p.Z > m_sao_limit_max; +} -- cgit v1.2.3