add pathfinding library

src/logic/scripting/lua/libs/libpathfinding.cpp

@@ -0,0 +1,55 @@
+#include "api_lua.hpp"
+
+#include "voxels/Pathfinding.hpp"
+#include "world/Level.hpp"
+
+using namespace scripting;
+
+static voxels::Agent* get_agent(lua::State* L) {
+    return level->pathfinding->getAgent(lua::tointeger(L, 1));
+}
+
+static int l_create_agent(lua::State* L) {
+    return lua::pushinteger(L, level->pathfinding->createAgent());
+}
+
+static int l_set_enabled(lua::State* L) {
+    if (auto agent = get_agent(L)) {
+        agent->enabled = lua::toboolean(L, 2);
+    }
+    return 0;
+}
+
+static int l_is_enabled(lua::State* L) {
+    if (auto agent = get_agent(L)) {
+        return lua::pushboolean(L, agent->enabled);
+    }
+    return lua::pushboolean(L, false);
+}
+
+static int l_make_route(lua::State* L) {
+    if (auto agent = get_agent(L)) {
+        auto start = lua::tovec3(L, 2);
+        auto target = lua::tovec3(L, 3);
+        auto route = level->pathfinding->perform(*agent, start, target);
+        agent->route = route;
+        if (!route.found) {
+            return 0;
+        }
+        lua::createtable(L, route.nodes.size(), 0);
+        for (int i = 0; i < route.nodes.size(); i++) {
+            lua::pushvec3(L, route.nodes[i].pos);
+            lua::rawseti(L, i + 1);
+        }
+        return 1;
+    }
+    return 0;
+}
+
+const luaL_Reg pathfindinglib[] = {
+    {"create_agent", lua::wrap<l_create_agent>},
+    {"set_enabled", lua::wrap<l_set_enabled>},
+    {"is_enabled", lua::wrap<l_is_enabled>},
+    {"make_route", lua::wrap<l_make_route>},
+    {NULL, NULL}
+};