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Mgv7: Clean up divide-by-zero fix

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paramat 2017-06-25 04:45:40 +01:00 committed by SmallJoker
parent 6e0557e20c
commit a08a93bc9c
2 changed files with 6 additions and 5 deletions
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9
src/mapgen_v7.cpp
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@ -57,13 +57,16 @@ MapgenV7::MapgenV7(int mapgenid, MapgenV7Params *params, EmergeManager *emerge)
this->spflags = params->spflags; this->spflags = params->spflags;
this->cave_width = params->cave_width; this->cave_width = params->cave_width;
this->float_mount_density = params->float_mount_density; this->float_mount_density = params->float_mount_density;
float_mount_height_lim = MYMAX(params->float_mount_height, 1.0f);
this->floatland_level = params->floatland_level; this->floatland_level = params->floatland_level;
this->shadow_limit = params->shadow_limit; this->shadow_limit = params->shadow_limit;
this->cavern_limit = params->cavern_limit; this->cavern_limit = params->cavern_limit;
this->cavern_taper = params->cavern_taper; this->cavern_taper = params->cavern_taper;
this->cavern_threshold = params->cavern_threshold; this->cavern_threshold = params->cavern_threshold;
// This is to avoid a divide-by-zero.
// Parameter will be saved to map_meta.txt in limited form.
params->float_mount_height = MYMAX(params->float_mount_height, 1.0f);
// 2D noise // 2D noise
noise_terrain_base = new Noise(&params->np_terrain_base, seed, csize.X, csize.Z); noise_terrain_base = new Noise(&params->np_terrain_base, seed, csize.X, csize.Z);
noise_terrain_alt = new Noise(&params->np_terrain_alt, seed, csize.X, csize.Z); noise_terrain_alt = new Noise(&params->np_terrain_alt, seed, csize.X, csize.Z);
@ -399,8 +402,8 @@ bool MapgenV7::getFloatlandMountainFromMap(int idx_xyz, int idx_xz, s16 y)
{ {
// Make rim 2 nodes thick to match floatland base terrain // Make rim 2 nodes thick to match floatland base terrain
float density_gradient = (y >= floatland_level) ? float density_gradient = (y >= floatland_level) ?
-pow((float)(y - floatland_level) / float_mount_height_lim, 0.75f) : -pow((float)(y - floatland_level) / float_mount_height, 0.75f) :
-pow((float)(floatland_level - 1 - y) / float_mount_height_lim, 0.75f); -pow((float)(floatland_level - 1 - y) / float_mount_height, 0.75f);
float floatn = noise_mountain->result[idx_xyz] + float_mount_density; float floatn = noise_mountain->result[idx_xyz] + float_mount_density;

2
src/mapgen_v7.h
View File

@ -103,8 +103,6 @@ private:
Noise *noise_float_base_height; Noise *noise_float_base_height;
Noise *noise_mountain; Noise *noise_mountain;
Noise *noise_ridge; Noise *noise_ridge;
float float_mount_height_lim;
}; };
#endif #endif