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Add Ore generation flags, implement ore absolute height
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@ -394,6 +394,13 @@ All default ores are of the uniformly-distributed scatter type.
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Places ore if there are no more than clust_scarcity number of specified nodes within a Von Neumann
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neighborhood of clust_size radius.
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Ore attributes
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-------------------
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Currently supported flags: absheight
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- absheight
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Also produce this same ore between the height range of -height_max and -height_min.
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Useful for having ore in sky realms without having to duplicate ore entries.
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Representations of simple things
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--------------------------------
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Position/vector:
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@ -1723,6 +1730,8 @@ Ore definition (register_ore)
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^ In this example, there is a 3x3x3 cluster where 8 out of the 27 nodes are coal ore
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height_min = -31000,
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height_max = 64,
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flags = "",
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^ Attributes for this ore generation
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noise_threshhold = 0.5,
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^ If noise is above this threshhold, ore is placed. Not needed for a uniform distribution
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noise_params = {offset=0, scale=1, spread={x=100, y=100, z=100}, seed=23, octaves=3, persist=0.70}
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@ -42,7 +42,14 @@ FlagDesc flagdesc_mapgen[] = {
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{"v6_jungles", MGV6_JUNGLES},
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{"v6_biome_blend", MGV6_BIOME_BLEND},
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{"flat", MG_FLAT},
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{NULL, 0}
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{NULL, 0}
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};
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FlagDesc flagdesc_ore[] = {
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{"absheight", OREFLAG_ABSHEIGHT},
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{"scatter_noisedensity", OREFLAG_DENSITY},
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{"claylike_nodeisnt", OREFLAG_NODEISNT},
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{NULL, 0}
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};
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@ -87,17 +94,28 @@ void Ore::resolveNodeNames(INodeDefManager *ndef) {
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void OreScatter::generate(Mapgen *mg, u32 blockseed, v3s16 nmin, v3s16 nmax) {
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if (nmin.Y > height_max || nmax.Y < height_min)
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int in_range = 0;
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in_range |= (nmin.Y <= height_max && nmax.Y >= height_min);
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if (flags & OREFLAG_ABSHEIGHT)
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in_range |= (nmin.Y >= -height_max && nmax.Y <= -height_min) << 1;
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if (!in_range)
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return;
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resolveNodeNames(mg->ndef);
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MapNode n_ore(ore);
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ManualMapVoxelManipulator *vm = mg->vm;
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PseudoRandom pr(blockseed);
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int ymin, ymax;
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int ymin = MYMAX(nmin.Y, height_min);
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int ymax = MYMIN(nmax.Y, height_max);
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if (in_range & ORE_RANGE_MIRROR) {
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ymin = MYMAX(nmin.Y, -height_max);
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ymax = MYMIN(nmax.Y, -height_min);
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} else {
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ymin = MYMAX(nmin.Y, height_min);
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ymax = MYMIN(nmax.Y, height_max);
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}
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if (clust_size >= ymax - ymin + 1)
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return;
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@ -131,17 +149,29 @@ void OreScatter::generate(Mapgen *mg, u32 blockseed, v3s16 nmin, v3s16 nmax) {
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void OreSheet::generate(Mapgen *mg, u32 blockseed, v3s16 nmin, v3s16 nmax) {
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if (nmin.Y > height_max || nmax.Y < height_min)
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return;
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int in_range = 0;
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in_range |= (nmin.Y <= height_max && nmax.Y >= height_min);
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if (flags & OREFLAG_ABSHEIGHT)
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in_range |= (nmin.Y >= -height_max && nmax.Y <= -height_min) << 1;
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if (!in_range)
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return;
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resolveNodeNames(mg->ndef);
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MapNode n_ore(ore);
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ManualMapVoxelManipulator *vm = mg->vm;
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PseudoRandom pr(blockseed + 4234);
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int ymin, ymax;
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int ymin = MYMAX(nmin.Y, height_min);
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int ymax = MYMIN(nmax.Y, height_max);
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if (in_range & ORE_RANGE_MIRROR) {
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ymin = MYMAX(nmin.Y, -height_max);
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ymax = MYMIN(nmax.Y, -height_min);
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} else {
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ymin = MYMAX(nmin.Y, height_min);
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ymax = MYMIN(nmax.Y, height_max);
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}
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if (clust_size >= ymax - ymin + 1)
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return;
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14
src/mapgen.h
14
src/mapgen.h
@ -36,7 +36,17 @@ with this program; if not, write to the Free Software Foundation, Inc.,
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#define MGV6_BIOME_BLEND 0x10
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#define MG_FLAT 0x20
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/////////////////// Ore generation flags
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// Use absolute value of height to determine ore placement
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#define OREFLAG_ABSHEIGHT 0x01
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// Use 3d noise to get density of ore placement, instead of just the position
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#define OREFLAG_DENSITY 0x02 // not yet implemented
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// For claylike ore types, place ore if the number of surrounding
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// nodes isn't the specified node
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#define OREFLAG_NODEISNT 0x04 // not yet implemented
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extern FlagDesc flagdesc_mapgen[];
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extern FlagDesc flagdesc_ore[];
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class BiomeDefManager;
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class Biome;
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@ -103,6 +113,9 @@ enum OreType {
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ORE_CLAYLIKE
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};
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#define ORE_RANGE_ACTUAL 1
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#define ORE_RANGE_MIRROR 2
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class Ore {
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public:
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std::string ore_name;
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@ -115,6 +128,7 @@ public:
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s16 clust_size; // how large (in nodes) a chunk of ore is
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s16 height_min;
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s16 height_max;
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u32 flags; // attributes for this ore
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float nthresh; // threshhold for noise at which an ore is placed
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NoiseParams *np; // noise for distribution of clusters (NULL for uniform scattering)
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Noise *noise;
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@ -717,6 +717,7 @@ static int l_register_ore(lua_State *L)
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ore->clust_size = getintfield_default(L, index, "clust_size", 0);
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ore->height_min = getintfield_default(L, index, "height_min", 0);
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ore->height_max = getintfield_default(L, index, "height_max", 0);
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ore->flags = getflagsfield(L, index, "flags", flagdesc_ore);
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ore->nthresh = getfloatfield_default(L, index, "noise_threshhold", 0.);
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lua_getfield(L, index, "noise_params");
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@ -336,6 +336,13 @@ void setboolfield(lua_State *L, int table,
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lua_setfield(L, table, fieldname);
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}
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u32 getflagsfield(lua_State *L, int table,
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const char *fieldname, FlagDesc *flagdesc) {
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std::string flagstring;
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flagstring = getstringfield_default(L, table, fieldname, "");
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return readFlagString(flagstring, flagdesc);
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}
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/* minetest specific types */
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MapNode readnode(lua_State *L, int index, INodeDefManager *ndef)
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@ -51,6 +51,8 @@ bool getboolfield(lua_State *L, int table,
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const char *fieldname, bool &result);
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bool getfloatfield(lua_State *L, int table,
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const char *fieldname, float &result);
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u32 getflagsfield(lua_State *L, int table,
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const char *fieldname, FlagDesc *flagdesc);
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std::string checkstringfield(lua_State *L, int table,
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const char *fieldname);
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