add on_update event

res/content/base/scripts/drop.lua

@@ -1,9 +1,11 @@
-function on_despawn()
-    print("despawn")
-end
-
+inair = true
 function on_grounded()
     entity.transform:set_rot(mat4.rotate({0, 1, 0}, math.random()*360))
-    print(stdcomp)
-    entity:despawn()
+    inair = false
+end
+
+function on_update()
+    if inair then
+        entity.transform:set_rot(mat4.rotate(entity.transform:get_rot(), {0, 1, 0}, math.random()*32))
+    end
 end

res/modules/internal/stdcomp.lua

@@ -40,6 +40,21 @@ return {
         return entity
     end,
     remove_Entity = function(eid)
-        entities[eid] = nil;
+        local entity = entities[eid]
+        if entity then
+            entity.env = nil
+            entities[eid] = nil;
+        end
+    end,
+    update = function()
+        for id,entity in pairs(entities) do
+            local callback = entity.env.on_update
+            if callback then
+                local result, err = pcall(callback)
+                if err then
+                    print(err)
+                end
+            end
+        end
     end
 }