From: kwolekr Date: Wed, 16 Sep 2015 01:28:16 +0000 (-0400) Subject: Ore: Add puff ore type X-Git-Tag: 0.4.14~688 X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=dcbb95338a9b0e2c5c95fcfc6eeceb9d6d93f320;p=oweals%2Fminetest.git Ore: Add puff ore type --- diff --git a/doc/lua_api.txt b/doc/lua_api.txt index ae414406d..af48c64f6 100644 --- a/doc/lua_api.txt +++ b/doc/lua_api.txt @@ -714,8 +714,8 @@ a non-equal distribution of ore. ### `sheet` Creates a sheet of ore in a blob shape according to the 2D perlin noise -described by `noise_params`. This is essentially an improved version of -the so-called "stratus" ore seen in some unofficial mods. +described by `noise_params` and `noise_threshold`. This is essentially an +improved version of the so-called "stratus" ore seen in some unofficial mods. This sheet consists of vertical columns of uniform randomly distributed height, varying between the inclusive range `column_height_min` and `column_height_max`. @@ -731,12 +731,23 @@ the default is 0.5. The ore parameters `clust_scarcity` and `clust_num_ores` are ignored for this ore type. +### `puff` +Creates a sheet of ore in a cloud-like puff shape. + +As with the `sheet` ore type, the size and shape of puffs are described by +`noise_params` and `noise_threshold` and are placed at random vertical positions +within the currently generated chunk. + +The vertical top and bottom displacement of each puff are determined by the noise +parameters `np_puff_top` and `np_puff_bottom`, respectively. + + ### `blob` Creates a deformed sphere of ore according to 3d perlin noise described by `noise_params`. The maximum size of the blob is `clust_size`, and `clust_scarcity` has the same meaning as with the `scatter` type. -### `vein +### `vein` Creates veins of ore varying in density by according to the intersection of two instances of 3d perlin noise with diffferent seeds, both described by `noise_params`. `random_factor` varies the influence random chance has on @@ -771,6 +782,17 @@ Also produce this same ore between the height range of `-y_max` and `-y_min`. Useful for having ore in sky realms without having to duplicate ore entries. +### `puff_cliffs` +If set, puff ore generation will not taper down large differences in displacement +when approaching the edge of a puff. This flag has no effect for ore types other +than `puff`. + +### `puff_additive_composition` +By default, when noise described by `np_puff_top` or `np_puff_bottom` results in a +negative displacement, the sub-column at that point is not generated. With this +attribute set, puff ore generation will instead generate the absolute difference in +noise displacement values. This flag has no effect for ore types other than `puff`. + Decoration types ---------------- The varying types of decorations that can be placed. diff --git a/src/mg_ore.cpp b/src/mg_ore.cpp index f5d312ba2..28be816f5 100644 --- a/src/mg_ore.cpp +++ b/src/mg_ore.cpp @@ -25,8 +25,10 @@ with this program; if not, write to the Free Software Foundation, Inc., #include "log.h" FlagDesc flagdesc_ore[] = { - {"absheight", OREFLAG_ABSHEIGHT}, - {NULL, 0} + {"absheight", OREFLAG_ABSHEIGHT}, + {"puff_cliffs", OREFLAG_PUFF_CLIFFS}, + {"puff_additive_composition", OREFLAG_PUFF_ADDITIVE}, + {NULL, 0} }; @@ -220,6 +222,94 @@ void OreSheet::generate(MMVManip *vm, int mapseed, u32 blockseed, /////////////////////////////////////////////////////////////////////////////// +OrePuff::OrePuff() : + Ore() +{ + noise_puff_top = NULL; + noise_puff_bottom = NULL; +} + + +OrePuff::~OrePuff() +{ + delete noise_puff_top; + delete noise_puff_bottom; +} + + +void OrePuff::generate(MMVManip *vm, int mapseed, u32 blockseed, + v3s16 nmin, v3s16 nmax, u8 *biomemap) +{ + PseudoRandom pr(blockseed + 4234); + MapNode n_ore(c_ore, 0, ore_param2); + + int y_start = pr.range(nmin.Y, nmax.Y); + + if (!noise) { + int sx = nmax.X - nmin.X + 1; + int sz = nmax.Z - nmin.Z + 1; + noise = new Noise(&np, 0, sx, sz); + noise_puff_top = new Noise(&np_puff_top, 0, sx, sz); + noise_puff_bottom = new Noise(&np_puff_bottom, 0, sx, sz); + } + + noise->seed = mapseed + y_start; + noise->perlinMap2D(nmin.X, nmin.Z); + bool noise_generated = false; + + size_t index = 0; + for (int z = nmin.Z; z <= nmax.Z; z++) + for (int x = nmin.X; x <= nmax.X; x++, index++) { + float noiseval = noise->result[index]; + if (noiseval < nthresh) + continue; + + if (biomemap && !biomes.empty()) { + std::set::iterator it = biomes.find(biomemap[index]); + if (it == biomes.end()) + continue; + } + + if (!noise_generated) { + noise_generated = true; + noise_puff_top->perlinMap2D(nmin.X, nmin.Z); + noise_puff_bottom->perlinMap2D(nmin.X, nmin.Z); + } + + float ntop = noise_puff_top->result[index]; + float nbottom = noise_puff_bottom->result[index]; + + if (!(flags & OREFLAG_PUFF_CLIFFS)) { + float ndiff = noiseval - nthresh; + if (ndiff < 1.0f) { + ntop *= ndiff; + nbottom *= ndiff; + } + } + + int ymid = y_start; + int y0 = ymid - nbottom; + int y1 = ymid + ntop; + + if ((flags & OREFLAG_PUFF_ADDITIVE) && (y0 > y1)) + SWAP(int, y0, y1); + + for (int y = y0; y <= y1; y++) { + u32 i = vm->m_area.index(x, y, z); + if (!vm->m_area.contains(i)) + continue; + if (!CONTAINS(c_wherein, vm->m_data[i].getContent())) + continue; + + vm->m_data[i] = n_ore; + } + } +} + + +/////////////////////////////////////////////////////////////////////////////// + + void OreBlob::generate(MMVManip *vm, int mapseed, u32 blockseed, v3s16 nmin, v3s16 nmax, u8 *biomemap) { @@ -285,7 +375,8 @@ void OreBlob::generate(MMVManip *vm, int mapseed, u32 blockseed, /////////////////////////////////////////////////////////////////////////////// -OreVein::OreVein() +OreVein::OreVein() : + Ore() { noise2 = NULL; } diff --git a/src/mg_ore.h b/src/mg_ore.h index db204437e..8ffb8fca0 100644 --- a/src/mg_ore.h +++ b/src/mg_ore.h @@ -30,17 +30,18 @@ class MMVManip; /////////////////// Ore generation flags -// Use absolute value of height to determine ore placement -#define OREFLAG_ABSHEIGHT 0x01 -#define OREFLAG_USE_NOISE 0x08 +#define OREFLAG_ABSHEIGHT 0x01 +#define OREFLAG_PUFF_CLIFFS 0x02 +#define OREFLAG_PUFF_ADDITIVE 0x04 +#define OREFLAG_USE_NOISE 0x08 #define ORE_RANGE_ACTUAL 1 #define ORE_RANGE_MIRROR 2 - enum OreType { ORE_SCATTER, ORE_SHEET, + ORE_PUFF, ORE_BLOB, ORE_VEIN, }; @@ -95,6 +96,22 @@ public: v3s16 nmin, v3s16 nmax, u8 *biomemap); }; +class OrePuff : public Ore { +public: + static const bool NEEDS_NOISE = true; + + NoiseParams np_puff_top; + NoiseParams np_puff_bottom; + Noise *noise_puff_top; + Noise *noise_puff_bottom; + + OrePuff(); + virtual ~OrePuff(); + + virtual void generate(MMVManip *vm, int mapseed, u32 blockseed, + v3s16 nmin, v3s16 nmax, u8 *biomemap); +}; + class OreBlob : public Ore { public: static const bool NEEDS_NOISE = true; @@ -134,6 +151,8 @@ public: return new OreScatter; case ORE_SHEET: return new OreSheet; + case ORE_PUFF: + return new OrePuff; case ORE_BLOB: return new OreBlob; case ORE_VEIN: diff --git a/src/script/lua_api/l_mapgen.cpp b/src/script/lua_api/l_mapgen.cpp index 9050816bb..dcb611f47 100644 --- a/src/script/lua_api/l_mapgen.cpp +++ b/src/script/lua_api/l_mapgen.cpp @@ -70,6 +70,7 @@ struct EnumString ModApiMapgen::es_OreType[] = { {ORE_SCATTER, "scatter"}, {ORE_SHEET, "sheet"}, + {ORE_PUFF, "puff"}, {ORE_BLOB, "blob"}, {ORE_VEIN, "vein"}, {0, NULL}, @@ -880,7 +881,7 @@ int ModApiMapgen::l_register_ore(lua_State *L) "ore_type", es_OreType, ORE_SCATTER); Ore *ore = oremgr->create(oretype); if (!ore) { - errorstream << "register_ore: ore_type " << oretype << " not implemented"; + errorstream << "register_ore: ore_type " << oretype << " not implemented\n"; return 0; } @@ -938,20 +939,42 @@ int ModApiMapgen::l_register_ore(lua_State *L) lua_pop(L, 1); //// Get type-specific parameters - if (oretype == ORE_SHEET) { - OreSheet *oresheet = (OreSheet *)ore; - - oresheet->column_height_min = getintfield_default(L, index, - "column_height_min", 1); - oresheet->column_height_max = getintfield_default(L, index, - "column_height_max", ore->clust_size); - oresheet->column_midpoint_factor = getfloatfield_default(L, index, - "column_midpoint_factor", 0.5f); - } else if (oretype == ORE_VEIN) { - OreVein *orevein = (OreVein *)ore; - - orevein->random_factor = getfloatfield_default(L, index, - "random_factor", 1.f); + switch (oretype) { + case ORE_SHEET: { + OreSheet *oresheet = (OreSheet *)ore; + + oresheet->column_height_min = getintfield_default(L, index, + "column_height_min", 1); + oresheet->column_height_max = getintfield_default(L, index, + "column_height_max", ore->clust_size); + oresheet->column_midpoint_factor = getfloatfield_default(L, index, + "column_midpoint_factor", 0.5f); + + break; + } + case ORE_PUFF: { + OrePuff *orepuff = (OrePuff *)ore; + + lua_getfield(L, index, "np_puff_top"); + read_noiseparams(L, -1, &orepuff->np_puff_top); + lua_pop(L, 1); + + lua_getfield(L, index, "np_puff_bottom"); + read_noiseparams(L, -1, &orepuff->np_puff_bottom); + lua_pop(L, 1); + + break; + } + case ORE_VEIN: { + OreVein *orevein = (OreVein *)ore; + + orevein->random_factor = getfloatfield_default(L, index, + "random_factor", 1.f); + + break; + } + default: + break; } ObjDefHandle handle = oremgr->add(ore);