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authorupsilon <upsilon@langg.net>2018-04-18 18:27:08 +0200
committersfan5 <sfan5@live.de>2019-08-14 13:15:41 +0200
commitb2065756cf9c90d493846a559587e4acec4a7851 (patch)
tree4a105572c46a6af0b0ed91bba0fb52d7f7537802
parentbf22184d6e16f21b9001322aad1bf8f6dbaa372b (diff)
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Add function `minetest.read_schematic`
-rw-r--r--doc/lua_api.txt12
-rw-r--r--src/script/lua_api/l_mapgen.cpp78
-rw-r--r--src/script/lua_api/l_mapgen.h3
3 files changed, 93 insertions, 0 deletions
diff --git a/doc/lua_api.txt b/doc/lua_api.txt
index 6506dc2b2..3d7d3ed3d 100644
--- a/doc/lua_api.txt
+++ b/doc/lua_api.txt
@@ -4844,6 +4844,18 @@ Schematics
the Lua code generated will use that number of spaces as indentation
instead of a tab character.
+* `minetest.read_schematic(schematic, options)`
+ * Returns a Lua table representing the schematic (see: [Schematic specifier])
+ * `schematic` is the schematic to read (see: [Schematic specifier])
+ * `options` is a table containing the following optional parameters:
+ * `write_yslice_prob`: string value:
+ * `none`: no `write_yslice_prob` table is inserted,
+ * `low`: only probabilities that are not 254 or 255 are written in
+ the `write_ylisce_prob` table,
+ * `all`: write all probabilities to the `write_yslice_prob` table.
+ * The default for this option is `all`.
+ * Any invalid value will be interpreted as `all`.
+
HTTP Requests
-------------
diff --git a/src/script/lua_api/l_mapgen.cpp b/src/script/lua_api/l_mapgen.cpp
index e7e002c16..2e0cba8dd 100644
--- a/src/script/lua_api/l_mapgen.cpp
+++ b/src/script/lua_api/l_mapgen.cpp
@@ -1754,6 +1754,83 @@ int ModApiMapgen::l_serialize_schematic(lua_State *L)
return 1;
}
+// read_schematic(schematic, options={...})
+int ModApiMapgen::l_read_schematic(lua_State *L)
+{
+ NO_MAP_LOCK_REQUIRED;
+
+ SchematicManager *schemmgr = getServer(L)->getEmergeManager()->schemmgr;
+
+ //// Read options
+ std::string write_yslice = getstringfield_default(L, 2, "write_yslice_prob", "all");
+
+ //// Get schematic
+ bool was_loaded = false;
+ Schematic *schem = (Schematic *)get_objdef(L, 1, schemmgr);
+ if (!schem) {
+ schem = load_schematic(L, 1, NULL, NULL);
+ was_loaded = true;
+ }
+ if (!schem) {
+ errorstream << "read_schematic: failed to get schematic" << std::endl;
+ return 0;
+ }
+ lua_pop(L, 2);
+
+ //// Create the Lua table
+ u32 numnodes = schem->size.X * schem->size.Y * schem->size.Z;
+ const std::vector<std::string> &names = schem->m_nodenames;
+
+ lua_createtable(L, 0, (write_yslice == "none") ? 2 : 3);
+
+ // Create the size field
+ push_v3s16(L, schem->size);
+ lua_setfield(L, 1, "size");
+
+ // Create the yslice_prob field
+ if (write_yslice != "none") {
+ lua_createtable(L, schem->size.Y, 0);
+ for (u16 y = 0; y != schem->size.Y; ++y) {
+ u8 probability = schem->slice_probs[y] & MTSCHEM_PROB_MASK;
+ if (probability < MTSCHEM_PROB_ALWAYS || write_yslice != "low") {
+ lua_createtable(L, 0, 2);
+ lua_pushinteger(L, y);
+ lua_setfield(L, 3, "ypos");
+ lua_pushinteger(L, probability * 2);
+ lua_setfield(L, 3, "prob");
+ lua_rawseti(L, 2, y + 1);
+ }
+ }
+ lua_setfield(L, 1, "yslice_prob");
+ }
+
+ // Create the data field
+ lua_createtable(L, numnodes, 0); // data table
+ for (u32 i = 0; i < numnodes; ++i) {
+ MapNode node = schem->schemdata[i];
+ u8 probability = node.param1 & MTSCHEM_PROB_MASK;
+ bool force_place = node.param1 & MTSCHEM_FORCE_PLACE;
+ lua_createtable(L, 0, force_place ? 4 : 3);
+ lua_pushstring(L, names[schem->schemdata[i].getContent()].c_str());
+ lua_setfield(L, 3, "name");
+ lua_pushinteger(L, probability * 2);
+ lua_setfield(L, 3, "prob");
+ lua_pushinteger(L, node.param2);
+ lua_setfield(L, 3, "param2");
+ if (force_place) {
+ lua_pushboolean(L, 1);
+ lua_setfield(L, 3, "force_place");
+ }
+ lua_rawseti(L, 2, i + 1);
+ }
+ lua_setfield(L, 1, "data");
+
+ if (was_loaded)
+ delete schem;
+
+ return 1;
+}
+
void ModApiMapgen::Initialize(lua_State *L, int top)
{
@@ -1793,4 +1870,5 @@ void ModApiMapgen::Initialize(lua_State *L, int top)
API_FCT(place_schematic);
API_FCT(place_schematic_on_vmanip);
API_FCT(serialize_schematic);
+ API_FCT(read_schematic);
}
diff --git a/src/script/lua_api/l_mapgen.h b/src/script/lua_api/l_mapgen.h
index 1339791f3..4a6a9ccf4 100644
--- a/src/script/lua_api/l_mapgen.h
+++ b/src/script/lua_api/l_mapgen.h
@@ -131,6 +131,9 @@ private:
// serialize_schematic(schematic, format, options={...})
static int l_serialize_schematic(lua_State *L);
+ // read_schematic(schematic, options={...})
+ static int l_read_schematic(lua_State *L);
+
public:
static void Initialize(lua_State *L, int top);