Noise: Prevent unittest crash caused by division by zero

[oweals/minetest.git] / src / mapgen_flat.cpp

diff --git a/src/mapgen_flat.cpp b/src/mapgen_flat.cpp
index e7f5f4dfebd4006246802c7f2df43075e7957857..9ae9d208c70468884ec229d85572b24af5000c79 100644 (file)
--- a/src/mapgen_flat.cpp
+++ b/src/mapgen_flat.cpp
@@ -51,15 +51,15 @@ FlagDesc flagdesc_mapgen_flat[] = {
 MapgenFlat::MapgenFlat(int mapgenid, MapgenFlatParams *params, EmergeManager *emerge)
        : MapgenBasic(mapgenid, params, emerge)
 {
-       this->spflags          = params->spflags;
-       this->ground_level     = params->ground_level;
-       this->large_cave_depth = params->large_cave_depth;
-       this->lava_depth       = params->lava_depth;
-       this->cave_width       = params->cave_width;
-       this->lake_threshold   = params->lake_threshold;
-       this->lake_steepness   = params->lake_steepness;
-       this->hill_threshold   = params->hill_threshold;
-       this->hill_steepness   = params->hill_steepness;
+       spflags          = params->spflags;
+       ground_level     = params->ground_level;
+       large_cave_depth = params->large_cave_depth;
+       lava_depth       = params->lava_depth;
+       cave_width       = params->cave_width;
+       lake_threshold   = params->lake_threshold;
+       lake_steepness   = params->lake_steepness;
+       hill_threshold   = params->hill_threshold;
+       hill_steepness   = params->hill_steepness;
 
        // 2D noise
        noise_filler_depth = new Noise(&params->np_filler_depth, seed, csize.X, csize.Z);
@@ -189,7 +189,7 @@ void MapgenFlat::makeChunk(BlockMakeData *data)
 
        // Init biome generator, place biome-specific nodes, and build biomemap
        biomegen->calcBiomeNoise(node_min);
-       MgStoneType stone_type = generateBiomes();
+       MgStoneType stone_type = generateBiomes(water_level - 1);
 
        if (flags & MG_CAVES)
                generateCaves(stone_surface_max_y, large_cave_depth);
@@ -199,10 +199,12 @@ void MapgenFlat::makeChunk(BlockMakeData *data)
 
        // Generate the registered decorations
        if (flags & MG_DECORATIONS)
-               m_emerge->decomgr->placeAllDecos(this, blockseed, node_min, node_max);
+               m_emerge->decomgr->placeAllDecos(this, blockseed,
+                       node_min, node_max, water_level - 1);
 
        // Generate the registered ores
-       m_emerge->oremgr->placeAllOres(this, blockseed, node_min, node_max);
+       m_emerge->oremgr->placeAllOres(this, blockseed,
+               node_min, node_max, water_level - 1);
 
        // Sprinkle some dust on top after everything else was generated
        dustTopNodes();
@@ -228,7 +230,7 @@ s16 MapgenFlat::generateTerrain()
        MapNode n_stone(c_stone);
        MapNode n_water(c_water_source);
 
-       v3s16 em = vm->m_area.getExtent();
+       const v3s16 &em = vm->m_area.getExtent();
        s16 stone_surface_max_y = -MAX_MAP_GENERATION_LIMIT;
        u32 ni2d = 0;