Add Rulesets (#494)

src/engine/Rulesets.cpp

@@ -0,0 +1,48 @@
+#include "Rulesets.h"
+#include "objects/Thwomp.h"
+#include "objects/Trophy.h"
+
+extern "C" {
+#include "code_800029B0.h"
+#include "memory.h"
+}
+
+// Before the game is loaded, and before vertices and displaylists are unpacked.
+// Only runs a single time at the beginning of a track.
+void Rulesets::PreLoad() {
+}
+
+// Just before BeginPlay() (used to spawn actors) is ran.
+// Only runs a single time at the beginning of a track.
+void Rulesets::PreInit() {
+    if (CVarGetInteger("gDisableItemboxes", false) == true) {
+        gPlaceItemBoxes = false;
+    } else {
+        gPlaceItemBoxes = true;
+    }
+}
+
+// Just after BeginPlay() is ran.
+// Only runs a single time at the beginning of a track.
+void Rulesets::PostInit() {
+    if (CVarGetInteger("gAllThwompsAreMarty", false) == true) {
+        for (auto object : gWorldInstance.Objects) {
+            if (OThwomp* thwomp = dynamic_cast<OThwomp*>(object)) {
+                gObjectList[thwomp->_objectIndex].unk_0D5 = OThwomp::States::JAILED; // Sets all the thwomp behaviour flags to marty
+                thwomp->State =  OThwomp::States::JAILED;
+            }
+        }
+    }
+
+    if (CVarGetInteger("gAllBombKartsChase", false) == true) {
+        for (auto object : gWorldInstance.Objects) {
+            if (OBombKart* kart = dynamic_cast<OBombKart*>(object)) {
+                kart->State = OBombKart::States::CHASE;
+            }
+        }
+    }
+
+    if (CVarGetInteger("gGoFish", false) == true) {
+        gWorldInstance.AddObject(new OTrophy(FVector(0,0,0), OTrophy::TrophyType::GOLD, OTrophy::Behaviour::GO_FISH));
+    }
+}

src/engine/Rulesets.h

@@ -0,0 +1,11 @@
+#pragma once
+
+#include <libultraship.h>
+#include "World.h"
+
+class Rulesets {
+public:
+    virtual void PreLoad();
+    virtual void PreInit();
+    virtual void PostInit();
+};

src/engine/courses/KalimariDesert.cpp

@@ -192,6 +192,10 @@ void KalimariDesert::BeginPlay() {
 
         s32 centerWaypoint = 160;
 
+        _numTrains = CVarGetInteger("gNumTrains", 2);
+        _numCarriages = CVarGetInteger("gNumCarriages", 5);
+        _tender = (ATrain::TenderStatus)CVarGetInteger("gHasTender", 1);
+
         // Spawn two trains
         for (size_t i = 0; i < _numTrains; ++i) {
             uint32_t waypoint = CalculateWaypointDistribution(i, _numTrains, gVehicle2DPathLength, centerWaypoint);

src/engine/courses/ToadsTurnpike.cpp

@@ -176,6 +176,11 @@ void ToadsTurnpike::BeginPlay() {
         a /= 2; // Normally vehicle logic is only ran every 2 frames. This slows the vehicles down to match.
         b /= 2;
 
+        _numTrucks = CVarGetInteger("gNumTrucks", 7);
+        _numBuses = CVarGetInteger("gNumBuses", 7);
+        _numTankerTrucks = CVarGetInteger("gNumTankerTrucks", 7);
+        _numCars = CVarGetInteger("gNumCars", 7);
+
         // Other game modes spawn seven of each vehicle
         if (gModeSelection == TIME_TRIALS) {
             _numTrucks = 8;

src/engine/objects/BombKart.cpp

@@ -253,6 +253,11 @@ void OBombKart::Tick() {
                 }
                 break;
             case States::CHASE:
+                // Prevents chasing during race staging
+                if (gRaceState != RACE_IN_PROGRESS)  {
+                    return;
+                }
+
                 if (!_target) {
                     _target = OBombKart::FindTarget();
                 } else {