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, 49 insertions, 0 deletions

diff --git a/src/ent.c b/src/ent.c
new file mode 100644
index 0000000..b621e0b
--- /dev/null
+++ b/src/ent.c
@@ -0,0 +1,49 @@
+/*
+ * Copyright © 2022 Michael Smith <mikesmiffy128@gmail.com>
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED “AS IS” AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+ * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+ * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+ * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+ * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <stdbool.h>
+
+#include "con_.h"
+#include "engineapi.h"
+#include "gamedata.h"
+#include "gametype.h"
+#include "intdefs.h"
+#include "vcall.h"
+
+DECL_VFUNC_DYN(void *, PEntityOfEntIndex, int)
+
+void *ent_get(int idx) {
+	// TODO(compat): Based on previous attempts at this, for L4D2, we need
+	// factory_server("PlayerInfoManager002")->GetGlobalVars()->edicts
+	// (offset 22 or so). Then get edicts from that. For now, we only need this
+	// for Portal FOV stuff, so just doing this eiface stuff.
+
+	struct edict *e = VCALL(engserver, PEntityOfEntIndex, idx);
+	if (!e) return 0;
+	return e->ent_unknown;
+}
+
+bool ent_init(void) {
+	if (!has_vtidx_PEntityOfEntIndex) {
+		con_warn("ent: missing gamedata entries for this engine\n");
+		return false;
+	}
+	// for PEntityOfEntIndex we don't really have to do any more init, we can
+	// just call the function later.
+	return true;
+}
+
+// vi: sw=4 ts=4 noet tw=80 cc=80