Place schematic (on vmanip): Enable use of 'place center' flags

For 'place schematic' and 'place schematic on vmanip' APIs.
Fix 'place center' code to properly centre schematics.
Fix some comments.

2 files changed, 22 insertions, 8 deletions

diff --git a/src/script/lua_api/l_mapgen.cpp b/src/script/lua_api/l_mapgen.cpp
index 775f4a76d..ccbe9a4b0 100644
--- a/src/script/lua_api/l_mapgen.cpp
+++ b/src/script/lua_api/l_mapgen.cpp
@@ -1529,7 +1529,8 @@ int ModApiMapgen::l_create_schematic(lua_State *L)
 }
 
 
-// place_schematic(p, schematic, rotation, replacement)
+// place_schematic(p, schematic, rotation,
+//     replacements, force_placement, flagstring)
 int ModApiMapgen::l_place_schematic(lua_State *L)
 {
 	MAP_LOCK_REQUIRED;
@@ -1565,12 +1566,19 @@ int ModApiMapgen::l_place_schematic(lua_State *L)
 		return 0;
 	}
 
-	schem->placeOnMap(map, p, 0, (Rotation)rot, force_placement);
+	//// Read flags
+	u32 flags = 0;
+	read_flags(L, 6, flagdesc_deco, &flags, NULL);
+
+	schem->placeOnMap(map, p, flags, (Rotation)rot, force_placement);
 
 	lua_pushboolean(L, true);
 	return 1;
 }
 
+
+// place_schematic_on_vmanip(vm, p, schematic, rotation,
+//     replacements, force_placement, flagstring)
 int ModApiMapgen::l_place_schematic_on_vmanip(lua_State *L)
 {
 	NO_MAP_LOCK_REQUIRED;
@@ -1606,13 +1614,18 @@ int ModApiMapgen::l_place_schematic_on_vmanip(lua_State *L)
 		return 0;
 	}
 
+	//// Read flags
+	u32 flags = 0;
+	read_flags(L, 7, flagdesc_deco, &flags, NULL);
+
 	bool schematic_did_fit = schem->placeOnVManip(
-		vm, p, 0, (Rotation)rot, force_placement);
+		vm, p, flags, (Rotation)rot, force_placement);
 
 	lua_pushboolean(L, schematic_did_fit);
 	return 1;
 }
 
+
 // serialize_schematic(schematic, format, options={...})
 int ModApiMapgen::l_serialize_schematic(lua_State *L)
 {
diff --git a/src/script/lua_api/l_mapgen.h b/src/script/lua_api/l_mapgen.h
index f6a821b4e..44073620b 100644
--- a/src/script/lua_api/l_mapgen.h
+++ b/src/script/lua_api/l_mapgen.h
@@ -70,10 +70,10 @@ private:
 	// get_noiseparam_defaults(name)
 	static int l_get_noiseparams(lua_State *L);
 
-	// set_gen_notify(flagstring)
+	// set_gen_notify(flags, {deco_id_table})
 	static int l_set_gen_notify(lua_State *L);
 
-	// set_gen_notify(flagstring)
+	// get_gen_notify()
 	static int l_get_gen_notify(lua_State *L);
 
 	// register_biome({lots of stuff})
@@ -109,11 +109,12 @@ private:
 	// create_schematic(p1, p2, probability_list, filename)
 	static int l_create_schematic(lua_State *L);
 
-	// place_schematic(p, schematic, rotation, replacements, force_placement)
+	// place_schematic(p, schematic, rotation,
+	//     replacements, force_placement, flagstring)
 	static int l_place_schematic(lua_State *L);
 
-	// place_schematic_on_vmanip(vm, p, schematic,
-	//     rotation, replacements, force_placement)
+	// place_schematic_on_vmanip(vm, p, schematic, rotation,
+	//     replacements, force_placement, flagstring)
 	static int l_place_schematic_on_vmanip(lua_State *L);
 
 	// serialize_schematic(schematic, format, options={...})