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--- dev:epic [2022/10/27 17:04] – lmcrae
+++ dev:epic [2023/05/29 21:04] (current) – removed lmcrae
@@ Line 1: / Line 1: @@
-===== tolua Notes =====
-[[dev:tolua|Here are my notes]] I use when I have to work on this system.
-===== C++ calling lua =====
-Here is how a C++ class can call into it's lua instance. I think this is where I was confused by what was being asking. Sorry, I don't know why it wasn't apparent to me.
-  * I have a LuaObject that has access to it's Rtti/metadata.
-    * I also have my own header parser that generates this code.
-    * So I have access to the actual class name such as "Forge::Light".
-    * {{:dev:epic_rtti.png|}}
-  * Every class has a class metatable that represent that class in lua
-    * This metatables are created and populated during initialization.
-    * There is master table stored in the lua registry, that has a mapping from class names to metatables.
-  * There is also a mapping of c++ lightuserdata (pointer/instance) to metatables.
-  * Also there is a list for garbage collection that is used when lua has full ownership of a c++ instance.
-    * When a userdata is collected, this list is checked too see if the instance needs collecting.
-    * If it does, it uses the class destructor.
-This is an example of the forge::Light class using the rtti/metadata in my editor
-{{:dev:epic_editor.png|}}
-===== lua calling C++ =====
-Here is a stripped down class that shows the basics of how the system calls a C++ function from lua.
-**1)** Header files are marked up using comments to expose/export classes and functions.
-{{:dev:epic_tolua_header.png}}
-**2)** Here is the generated cpp that gets added to the project.
-{{:dev:epic_tolua_codegen.png|}}