add transform:get_size(), :set_size(...)

src/logic/scripting/lua/libentity.cpp

@@ -195,6 +195,8 @@ const luaL_Reg modeltreelib [] = {
 const luaL_Reg transformlib [] = {
     {"get_pos", lua::wrap<l_get_pos>},
     {"set_pos", lua::wrap<l_set_pos>},
+    {"get_size", lua::wrap<l_get_size>},
+    {"set_size", lua::wrap<l_set_size>},
     {"get_rot", lua::wrap<l_get_rot>},
     {"set_rot", lua::wrap<l_set_rot>},
     {NULL, NULL}

src/objects/Entities.hpp

@@ -44,6 +44,13 @@ struct Transform {
         dirty = true;
     }
 
+    inline void setSize(glm::vec3 v) {
+        if (glm::distance2(size, v) >= 0.0000001f) {
+            dirty = true;
+        }
+        size = v;
+    }
+
     inline void setPos(glm::vec3 v) {
         if (glm::distance2(pos, v) >= 0.00001f) {
             dirty = true;