Centralise engine access, add Portal FOV changer

- A bunch of stuff is now defined in one header, engineapi.h
- engineapi.c is responsible for setting up any interfaces/stuff that's
  used in more than one place
- mkgamedata is pretty much rewritten and now supports nested
  conditionals
- gamedata variables no longer have the gamedata_ prefix because it was
  just annoyingly long all the time
- vcall macros are somewhat revamped and support dynamic (gamedata)
  indices
- Portal 1 FOV can be set anywhere from 75-120 using fov_desired -
  tested in both the main versions currently used by runners
- A few typos were also fixed ("intput," "writeable," "indexes")

1 files changed, 7 insertions, 1 deletions

diff --git a/src/con_.h b/src/con_.h
index ed93bad..93306ad 100644
--- a/src/con_.h
+++ b/src/con_.h
@@ -144,7 +144,13 @@ struct con_var { // ConVar in engine
 	float minval;
 	bool hasmax; // just sticking to sdk position for now
 	float maxval;
-	//void *cb; // we don't currently bother with callback support. add if needed!
+	/*
+	 * Our quickly-chucked in optional callback - doesn't match the engine!!
+	 * Also has to be manually set in code, although that's probably fine anyway
+	 * as it's common to only want a cvar to do something if the feature
+	 * succesfully init-ed.
+	 */
+	void (*cb)(struct con_var *this);
 };
 
 /* The change callback used in most branches of Source. Takes an IConVar :) */