forked from Mirrorlandia_minetest/minetest
Mapgen caves: Re-order generation to fix cavern bug
Previously, caverns confused tunnel generation causing biome top and filler nodes to appear in caverns. Split 'generateCaves()' into 2 functions to separate tunnel and large randomwalk cave generation. In each mapgen re-order cave generation to generate tunnels before caverns.
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@ -824,21 +824,26 @@ void MapgenBasic::dustTopNodes()
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}
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void MapgenBasic::generateCaves(s16 max_stone_y, s16 large_cave_depth)
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void MapgenBasic::generateCavesNoiseIntersection(s16 max_stone_y)
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{
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if (max_stone_y < node_min.Y)
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if (node_min.Y > max_stone_y)
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return;
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CavesNoiseIntersection caves_noise(ndef, m_bmgr, csize,
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&np_cave1, &np_cave2, seed, cave_width);
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caves_noise.generateCaves(vm, node_min, node_max, biomemap);
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}
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if (node_max.Y > large_cave_depth)
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void MapgenBasic::generateCavesRandomWalk(s16 max_stone_y, s16 large_cave_depth)
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{
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if (node_min.Y > max_stone_y || node_max.Y > large_cave_depth)
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return;
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PseudoRandom ps(blockseed + 21343);
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u32 bruises_count = ps.range(0, 2);
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for (u32 i = 0; i < bruises_count; i++) {
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CavesRandomWalk cave(ndef, &gennotify, seed, water_level,
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c_water_source, c_lava_source, lava_depth, biomegen);
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@ -849,7 +854,7 @@ void MapgenBasic::generateCaves(s16 max_stone_y, s16 large_cave_depth)
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}
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bool MapgenBasic::generateCaverns(s16 max_stone_y)
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bool MapgenBasic::generateCavernsNoise(s16 max_stone_y)
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{
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if (node_min.Y > max_stone_y || node_min.Y > cavern_limit)
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return false;
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@ -238,11 +238,12 @@ public:
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MapgenBasic(int mapgenid, MapgenParams *params, EmergeManager *emerge);
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virtual ~MapgenBasic();
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virtual void generateCaves(s16 max_stone_y, s16 large_cave_depth);
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virtual bool generateCaverns(s16 max_stone_y);
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virtual void generateDungeons(s16 max_stone_y);
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virtual void generateBiomes();
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virtual void dustTopNodes();
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virtual void generateCavesNoiseIntersection(s16 max_stone_y);
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virtual void generateCavesRandomWalk(s16 max_stone_y, s16 large_cave_depth);
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virtual bool generateCavernsNoise(s16 max_stone_y);
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virtual void generateDungeons(s16 max_stone_y);
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protected:
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EmergeManager *m_emerge;
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@ -250,20 +250,25 @@ void MapgenCarpathian::makeChunk(BlockMakeData *data)
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biomegen->calcBiomeNoise(node_min);
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generateBiomes();
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// Generate caverns, tunnels and classic caves
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// Generate tunnels, caverns and large randomwalk caves
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if (flags & MG_CAVES) {
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bool has_cavern = false;
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// Generate tunnels first as caverns confuse them
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generateCavesNoiseIntersection(stone_surface_max_y);
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// Generate caverns
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bool near_cavern = false;
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if (spflags & MGCARPATHIAN_CAVERNS)
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has_cavern = generateCaverns(stone_surface_max_y);
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// Generate tunnels and classic caves
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if (has_cavern)
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// Disable classic caves in this mapchunk by setting
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near_cavern = generateCavernsNoise(stone_surface_max_y);
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// Generate large randomwalk caves
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if (near_cavern)
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// Disable large randomwalk caves in this mapchunk by setting
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// 'large cave depth' to world base. Avoids excessive liquid in
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// large caverns and floating blobs of overgenerated liquid.
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generateCaves(stone_surface_max_y, -MAX_MAP_GENERATION_LIMIT);
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generateCavesRandomWalk(stone_surface_max_y,
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-MAX_MAP_GENERATION_LIMIT);
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else
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generateCaves(stone_surface_max_y, large_cave_depth);
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generateCavesRandomWalk(stone_surface_max_y, large_cave_depth);
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}
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// Generate dungeons
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@ -198,8 +198,12 @@ void MapgenFlat::makeChunk(BlockMakeData *data)
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biomegen->calcBiomeNoise(node_min);
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generateBiomes();
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if (flags & MG_CAVES)
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generateCaves(stone_surface_max_y, large_cave_depth);
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if (flags & MG_CAVES) {
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// Generate tunnels
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generateCavesNoiseIntersection(stone_surface_max_y);
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// Generate large randomwalk caves
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generateCavesRandomWalk(stone_surface_max_y, large_cave_depth);
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}
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if ((flags & MG_DUNGEONS) && full_node_min.Y >= dungeon_ymin &&
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full_node_max.Y <= dungeon_ymax)
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@ -209,8 +209,12 @@ void MapgenFractal::makeChunk(BlockMakeData *data)
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biomegen->calcBiomeNoise(node_min);
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generateBiomes();
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if (flags & MG_CAVES)
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generateCaves(stone_surface_max_y, large_cave_depth);
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if (flags & MG_CAVES) {
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// Generate tunnels
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generateCavesNoiseIntersection(stone_surface_max_y);
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// Generate large randomwalk caves
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generateCavesRandomWalk(stone_surface_max_y, large_cave_depth);
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}
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if ((flags & MG_DUNGEONS) && full_node_min.Y >= dungeon_ymin &&
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full_node_max.Y <= dungeon_ymax)
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@ -209,20 +209,25 @@ void MapgenV5::makeChunk(BlockMakeData *data)
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biomegen->calcBiomeNoise(node_min);
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generateBiomes();
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// Generate caverns, tunnels and classic caves
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// Generate tunnels, caverns and large randomwalk caves
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if (flags & MG_CAVES) {
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bool near_cavern = false;
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// Generate tunnels first as caverns confuse them
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generateCavesNoiseIntersection(stone_surface_max_y);
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// Generate caverns
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bool near_cavern = false;
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if (spflags & MGV5_CAVERNS)
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near_cavern = generateCaverns(stone_surface_max_y);
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// Generate tunnels and classic caves
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near_cavern = generateCavernsNoise(stone_surface_max_y);
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// Generate large randomwalk caves
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if (near_cavern)
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// Disable classic caves in this mapchunk by setting
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// Disable large randomwalk caves in this mapchunk by setting
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// 'large cave depth' to world base. Avoids excessive liquid in
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// large caverns and floating blobs of overgenerated liquid.
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generateCaves(stone_surface_max_y, -MAX_MAP_GENERATION_LIMIT);
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generateCavesRandomWalk(stone_surface_max_y,
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-MAX_MAP_GENERATION_LIMIT);
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else
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generateCaves(stone_surface_max_y, large_cave_depth);
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generateCavesRandomWalk(stone_surface_max_y, large_cave_depth);
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}
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// Generate dungeons and desert temples
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@ -313,20 +313,25 @@ void MapgenV7::makeChunk(BlockMakeData *data)
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biomegen->calcBiomeNoise(node_min);
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generateBiomes();
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// Generate caverns, tunnels and classic caves
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// Generate tunnels, caverns and large randomwalk caves
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if (flags & MG_CAVES) {
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bool near_cavern = false;
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// Generate tunnels first as caverns confuse them
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generateCavesNoiseIntersection(stone_surface_max_y);
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// Generate caverns
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bool near_cavern = false;
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if (spflags & MGV7_CAVERNS)
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near_cavern = generateCaverns(stone_surface_max_y);
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// Generate tunnels and classic caves
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near_cavern = generateCavernsNoise(stone_surface_max_y);
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// Generate large randomwalk caves
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if (near_cavern)
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// Disable classic caves in this mapchunk by setting
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// Disable large randomwalk caves in this mapchunk by setting
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// 'large cave depth' to world base. Avoids excessive liquid in
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// large caverns and floating blobs of overgenerated liquid.
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generateCaves(stone_surface_max_y, -MAX_MAP_GENERATION_LIMIT);
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generateCavesRandomWalk(stone_surface_max_y,
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-MAX_MAP_GENERATION_LIMIT);
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else
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generateCaves(stone_surface_max_y, large_cave_depth);
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generateCavesRandomWalk(stone_surface_max_y, large_cave_depth);
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}
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// Generate dungeons
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@ -233,18 +233,23 @@ void MapgenValleys::makeChunk(BlockMakeData *data)
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// Place biome-specific nodes and build biomemap
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generateBiomes();
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// Generate caverns, tunnels and classic caves
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// Generate tunnels, caverns and large randomwalk caves
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if (flags & MG_CAVES) {
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// Generate tunnels first as caverns confuse them
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generateCavesNoiseIntersection(stone_surface_max_y);
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// Generate caverns
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bool near_cavern = generateCaverns(stone_surface_max_y);
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// Generate tunnels and classic caves
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bool near_cavern = generateCavernsNoise(stone_surface_max_y);
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// Generate large randomwalk caves
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if (near_cavern)
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// Disable classic caves in this mapchunk by setting
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// Disable large randomwalk caves in this mapchunk by setting
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// 'large cave depth' to world base. Avoids excessive liquid in
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// large caverns and floating blobs of overgenerated liquid.
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generateCaves(stone_surface_max_y, -MAX_MAP_GENERATION_LIMIT);
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generateCavesRandomWalk(stone_surface_max_y,
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-MAX_MAP_GENERATION_LIMIT);
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else
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generateCaves(stone_surface_max_y, large_cave_depth);
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generateCavesRandomWalk(stone_surface_max_y, large_cave_depth);
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}
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// Dungeon creation
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