add entity library

src/logic/scripting/lua/libentity.cpp

@@ -8,19 +8,43 @@
 #include "../../../window/Camera.hpp"
 #include "../../../frontend/hud.hpp"
 
+#include <optional>
+
 namespace scripting {
     extern Hud* hud;
 }
 using namespace scripting;
 
+static std::optional<Entity> get_entity(lua::State* L, int idx) {
+    auto id = lua::tointeger(L, idx);
+    auto level = controller->getLevel();
+    return level->entities->get(id);
+}
+
 static int l_test(lua::State* L) {
     auto level = controller->getLevel();
     auto player = hud->getPlayer();
-    level->entities->drop(player->camera->position, player->camera->front*8.0f+glm::vec3(0, 2, 0)+player->hitbox->velocity);
-    return 0;        
+    auto id = level->entities->drop(player->camera->position);
+    return lua::pushinteger(L, id);
+}
+
+static int l_get_vel(lua::State* L) {
+    if (auto entity = get_entity(L, 1)) {
+        return lua::pushvec3_arr(L, entity->getHitbox().velocity);
+    }
+    return 0;
+}
+
+static int l_set_vel(lua::State* L) {
+    if (auto entity = get_entity(L, 1)) {
+        entity->getHitbox().velocity = lua::tovec3(L, 2);
+    }
+    return 0;
 }
 
 const luaL_Reg entitylib [] = {
     {"test", lua::wrap<l_test>},
+    {"get_vel", lua::wrap<l_get_vel>},
+    {"set_vel", lua::wrap<l_set_vel>},
     {NULL, NULL}
 };

src/logic/scripting/lua/lua_util.hpp

@@ -379,6 +379,16 @@ namespace lua {
         pop(L);
         return glm::vec4(x, y, z, w);
     }
+    inline glm::vec3 tovec3_stack(lua::State* L, int idx) { 
+        return glm::vec3(
+            tonumber(L, idx), tonumber(L, idx+1), tonumber(L, idx+2)
+        );
+    }
+    inline glm::vec4 tovec4_stack(lua::State* L, int idx) { 
+        return glm::vec4(
+            tonumber(L, idx), tonumber(L, idx+1), tonumber(L, idx+2), tonumber(L, idx+3)
+        );
+    }
     inline glm::mat4 tomat4(lua::State* L, int idx) {
         pushvalue(L, idx);
         if (!istable(L, idx) || objlen(L, idx) < 16) {