Add HyperEnemies mode

mm/2s2h/BenGui/SearchableMenuItems.h

@@ -1095,6 +1095,8 @@ void AddEnhancements() {
                 WIDGET_CVAR_CHECKBOX },
               { "Time Moves when you Move", "gModes.TimeMovesWhenYouMove",
                 "Time only moves when Link is not standing still.", WIDGET_CVAR_CHECKBOX },
+              { "Hyper Enemies", "gModes.HyperEnemies",
+                "Double the rate at which enemies are updated, making them more difficult", WIDGET_CVAR_CHECKBOX },
               { "Mirrored World",
                 "gModes.MirroredWorld.Mode",
                 "Mirrors the world horizontally.",

mm/2s2h/Enhancements/Modes/HyperEnemies.cpp

@@ -0,0 +1,34 @@
+#include <libultraship/bridge.h>
+#include "2s2h/GameInteractor/GameInteractor.h"
+#include "2s2h/ShipInit.hpp"
+
+extern "C" {
+#include "variables.h"
+#include "functions.h"
+}
+
+#define CVAR_NAME "gModes.HyperEnemies"
+#define CVAR CVarGetInteger(CVAR_NAME, 0)
+
+void RegisterHyperEnemies() {
+    COND_HOOK(OnActorUpdate, CVAR, [](Actor* actor) {
+        if (actor->category != ACTORCAT_ENEMY) {
+            return;
+        }
+
+        if (Player_InBlockingCsMode(gPlayState, GET_PLAYER(gPlayState))) {
+            return;
+        }
+
+        if (actor->update != NULL) {
+            // Everywhere we need to disable the collision checks already checks if frameAdvance is enabled, so we abuse
+            // that temporarily. This doesn't have any _known_ side effects :)
+            bool prevFrameAdv = gPlayState->frameAdvCtx.enabled;
+            gPlayState->frameAdvCtx.enabled = true;
+            actor->update(actor, gPlayState);
+            gPlayState->frameAdvCtx.enabled = prevFrameAdv;
+        }
+    });
+}
+
+static RegisterShipInitFunc initFunc(RegisterHyperEnemies, { CVAR_NAME });