Add basic script element

engine/script.lua

@@ -0,0 +1,27 @@
+local self = ...
+local engine = require("engine")
+
+function self.create(element)
+	element.memhiOriginal = element.memhi
+	element.memhi = {}
+	local mt = {
+		__index = function(t,k)
+			return element.memhiOriginal[k]
+		end,
+		__newindex = function(t,k,v)
+			element.memhiOriginal[k] = v
+			if k == "file" then
+				if element.memlo.script ~= nil then self.destroy(element) end
+				element.memlo.script = loadfile(engine.path(self._type.. "/" ..v))(element)
+			end
+		end
+	}
+	setmetatable(element.memhi,mt)
+end
+
+function self.destroy(element)
+	element.memlo.script.destroy(element)
+end
+
+function self.unload()
+end

lib/engine/init.lua

@@ -3,6 +3,7 @@ local engine = {}
 function engine.null() end
 
 engine.elements = {}
+engine.elementsByType = {}
 engine.elementTypes = {}
 engine.element = {}
 
@@ -26,6 +27,7 @@ function engine.element.create(elementType)
 			_references = 0
 		}
 		
+		engine.elementsByType[elementType] = {}
 		assert(loadfile(engine.path(elementType.. ".lua")))(engine.elementTypes[elementType])
 	end
 	
@@ -39,7 +41,8 @@ function engine.element.create(elementType)
 	
 	local element = {
 		memlo = {
-			_children = {}
+			_children = {},
+			_type = engine.elementTypes[elementType]
 		},
 		memhi = {
 			_id = id,
@@ -51,6 +54,7 @@ function engine.element.create(elementType)
 	
 	engine.elementTypes[elementType].create(element)
 	engine.elements[id] = element
+	engine.elementsByType[elementType][id] = element
 	return element
 end
 
@@ -87,11 +91,13 @@ function engine.element.destroy(element,destroyChildren)
 	
 	engine.elementTypes[element.memhi._type].destroy(element)
 	engine.elements[element.memhi._id] = nil
+	engine.elementsByType[element.memhi._type][element.memhi._id] = nil
 	
 	engine.elementTypes[element.memhi._type]._references = engine.elementTypes[element.memhi._type]._references - 1
 	if engine.elementTypes[element.memhi._type]._references == 0 then
 		engine.elementTypes[element.memhi._type].unload()
 		engine.elementTypes[element.memhi._type] = nil
+		engine.elementsByType[element.memhi._type] = nil
 	end
 end