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find_nodes_in_area: Extend maximal count to U32_MAX (#5277)
Extend documentation, limit area volume Remove u16 count limitation * Prevent integer overflow, replace minp/maxp with pos1/pos2
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@ -2465,12 +2465,13 @@ and `minetest.auth_reload` call the authetification handler.
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* `nodenames`: e.g. `{"ignore", "group:tree"}` or `"default:dirt"`
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* `search_center` is an optional boolean (default: `false`)
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If true `pos` is also checked for the nodes
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* `minetest.find_nodes_in_area(minp, maxp, nodenames)`: returns a list of positions
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* returns as second value a table with the count of the individual nodes found
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* `minetest.find_nodes_in_area(pos1, pos2, nodenames)`: returns a list of positions
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* `nodenames`: e.g. `{"ignore", "group:tree"}` or `"default:dirt"`
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* `minetest.find_nodes_in_area_under_air(minp, maxp, nodenames)`: returns a list of positions
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* returned positions are nodes with a node air above
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* First return value: Table with all node positions
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* Second return value: Table with the count of each node with the node name as index
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* `minetest.find_nodes_in_area_under_air(pos1, pos2, nodenames)`: returns a list of positions
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* `nodenames`: e.g. `{"ignore", "group:tree"}` or `"default:dirt"`
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* Return value: Table with all node positions with a node air above
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* `minetest.get_perlin(noiseparams)`
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* `minetest.get_perlin(seeddiff, octaves, persistence, scale)`
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* Return world-specific perlin noise (`int(worldseed)+seeddiff`)
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@ -651,38 +651,51 @@ int ModApiEnvMod::l_find_nodes_in_area(lua_State *L)
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INodeDefManager *ndef = getServer(L)->ndef();
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v3s16 minp = read_v3s16(L, 1);
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v3s16 maxp = read_v3s16(L, 2);
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sortBoxVerticies(minp, maxp);
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v3s16 cube = maxp - minp + 1;
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/* Limit for too large areas, assume default values
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* and give tolerances of 1 node on each side
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* (chunksize * MAP_BLOCKSIZE + 2)^3 = 551368
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*/
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if ((u64)cube.X * (u64)cube.Y * (u64)cube.Z > 551368) {
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luaL_error(L, "find_nodes_in_area(): area volume"
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" exceeds allowed value of 551368");
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return 0;
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}
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std::set<content_t> filter;
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if(lua_istable(L, 3)) {
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int table = 3;
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if (lua_istable(L, 3)) {
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lua_pushnil(L);
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while(lua_next(L, table) != 0) {
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while (lua_next(L, 3) != 0) {
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// key at index -2 and value at index -1
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luaL_checktype(L, -1, LUA_TSTRING);
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ndef->getIds(lua_tostring(L, -1), filter);
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// removes value, keeps key for next iteration
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lua_pop(L, 1);
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}
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} else if(lua_isstring(L, 3)) {
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} else if (lua_isstring(L, 3)) {
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ndef->getIds(lua_tostring(L, 3), filter);
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}
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std::map<content_t, u16> individual_count;
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std::unordered_map<content_t, u32> individual_count;
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lua_newtable(L);
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u64 i = 0;
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for (s16 x = minp.X; x <= maxp.X; x++)
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for (s16 y = minp.Y; y <= maxp.Y; y++)
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for (s16 z = minp.Z; z <= maxp.Z; z++) {
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v3s16 p(x, y, z);
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content_t c = env->getMap().getNodeNoEx(p).getContent();
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if (filter.count(c) != 0) {
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push_v3s16(L, p);
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lua_rawseti(L, -2, ++i);
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individual_count[c]++;
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}
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for (s16 y = minp.Y; y <= maxp.Y; y++)
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for (s16 z = minp.Z; z <= maxp.Z; z++) {
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v3s16 p(x, y, z);
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content_t c = env->getMap().getNodeNoEx(p).getContent();
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if (filter.count(c) != 0) {
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push_v3s16(L, p);
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lua_rawseti(L, -2, ++i);
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individual_count[c]++;
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}
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}
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lua_newtable(L);
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for (std::set<content_t>::iterator it = filter.begin();
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for (std::set<content_t>::const_iterator it = filter.begin();
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it != filter.end(); ++it) {
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lua_pushnumber(L, individual_count[*it]);
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lua_setfield(L, -2, ndef->get(*it).name.c_str());
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@ -706,12 +719,25 @@ int ModApiEnvMod::l_find_nodes_in_area_under_air(lua_State *L)
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INodeDefManager *ndef = getServer(L)->ndef();
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v3s16 minp = read_v3s16(L, 1);
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v3s16 maxp = read_v3s16(L, 2);
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sortBoxVerticies(minp, maxp);
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v3s16 cube = maxp - minp + 1;
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/* Limit for too large areas, assume default values
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* and give tolerances of 1 node on each side
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* (chunksize * MAP_BLOCKSIZE + 2)^3 = 551368
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*/
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if ((u64)cube.X * (u64)cube.Y * (u64)cube.Z > 551368) {
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luaL_error(L, "find_nodes_in_area_under_air(): area volume"
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" exceeds allowed value of 551368");
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return 0;
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}
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std::set<content_t> filter;
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if (lua_istable(L, 3)) {
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int table = 3;
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lua_pushnil(L);
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while(lua_next(L, table) != 0) {
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while (lua_next(L, 3) != 0) {
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// key at index -2 and value at index -1
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luaL_checktype(L, -1, LUA_TSTRING);
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ndef->getIds(lua_tostring(L, -1), filter);
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@ -732,7 +758,7 @@ int ModApiEnvMod::l_find_nodes_in_area_under_air(lua_State *L)
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for (; y <= maxp.Y; y++) {
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v3s16 psurf(x, y + 1, z);
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content_t csurf = env->getMap().getNodeNoEx(psurf).getContent();
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if(c != CONTENT_AIR && csurf == CONTENT_AIR &&
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if (c != CONTENT_AIR && csurf == CONTENT_AIR &&
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filter.count(c) != 0) {
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push_v3s16(L, v3s16(x, y, z));
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lua_rawseti(L, -2, ++i);
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