Implement opponent edit functions

src/DETHRACE/common/car.c

@@ -4527,33 +4527,60 @@ void ViewOpponent() {
 // IDA: void __cdecl ToggleCarToCarCollisions()
 void ToggleCarToCarCollisions() {
     LOG_TRACE("()");
-    NOT_IMPLEMENTED();
+
+   gCar_car_collisions = !gCar_car_collisions;
+   if (gCar_car_collisions) {
+       NewTextHeadupSlot(4, 0, 3000, -4, "Car Car Collisions");
+   } else {
+       NewTextHeadupSlot(4, 0, 3000, -4, "Ghost Cars");
+   }
 }
 
 // IDA: void __cdecl SwapCar()
 void SwapCar() {
     LOG_TRACE("()");
-    NOT_IMPLEMENTED();
 }
 
 // IDA: void __cdecl AdjustDownForce()
 void AdjustDownForce() {
     char s[100];
     tCar_spec* c;
     LOG_TRACE("()");
-    NOT_IMPLEMENTED();
+
+    c = gCar_to_view;
+    c->down_force_speed += 50.f;
+    if (c->down_force_speed > 2000.f) {
+        c->down_force_speed = 50.f;
+    }
+    if (c->down_force_speed > 300.f) {
+        c->down_force_speed = 2000.0;
+    }
+    sprintf(s, "DownForceSpeed %f", c->down_force_speed);
+    NewTextHeadupSlot(4, 0, 1500, -4, s);
 }
 
 // IDA: void __cdecl FreezeMechanics()
 void FreezeMechanics() {
     LOG_TRACE("()");
-    NOT_IMPLEMENTED();
+
+    gFreeze_mechanics = !gFreeze_mechanics;
+    if (gFreeze_mechanics) {
+        NewTextHeadupSlot(4, 0, 3000, -4, "Mechanics Frozen");
+    } else {
+        NewTextHeadupSlot(4, 0, 3000, -4, "Thawed Mechanics");
+    }
 }
 
 // IDA: void __cdecl PutOpponentsInNeutral()
 void PutOpponentsInNeutral() {
     LOG_TRACE("()");
-    NOT_IMPLEMENTED();
+
+    gStop_opponents_moving = !gStop_opponents_moving;
+    if (gStop_opponents_moving == 0) {
+        NewTextHeadupSlot(4, 0, 3000, -4, "Opponents in neutral");
+    } else {
+        NewTextHeadupSlot(4, 0, 3000, -4, "Back in gear");
+    }
 }
 
 // IDA: void __cdecl SetPanningFieldOfView()

src/DETHRACE/common/controls.c

@@ -274,7 +274,7 @@ tEdit_func* gEdit_funcs[10][18][8] = {
         // 1
         { ToggleOpponentProcessing, NULL, NULL, NULL, NULL, NULL, NULL, NULL },
         // 2
-        { CopStartPointInfo, DeleteCopStartPoint, DropCopStartPoint, NULL /* sub_411E7F (empty func) */, NULL, NULL, NULL },
+        { CopStartPointInfo, DeleteCopStartPoint, DropCopStartPoint, NULL, CycleCopStartPointType, NULL, NULL, NULL },
         // 3
         { ToggleMellowOpponents, NULL, NULL, NULL, NULL, NULL, NULL, NULL },
         // 4

src/DETHRACE/common/displays.c

@@ -746,7 +746,7 @@ int NewTextHeadupSlot2(int pSlot_index, int pFlash_rate, int pLifetime, int pFon
     LOG_TRACE("(%d, %d, %d, %d, \"%s\", %d)", pSlot_index, pFlash_rate, pLifetime, pFont_index, pText, pQueue_it);
 
     time = PDGetTotalTime();
-    if (pQueue_it && pSlot_index == 4 && (unsigned int)(time - gLast_centre_headup) < 1000) {
+    if (pQueue_it && pSlot_index == 4 && time - gLast_centre_headup < 1000) {
         if (gQueued_headup_count == 4) {
             KillOldestQueuedHeadup();
         }

src/DETHRACE/pd/sys.h

@@ -146,7 +146,7 @@ int PDGetGorePassword(void);
 
 void PDDisplayGoreworthiness(int pGory);
 
-void PDEnterDebugger(char* pStr);
+HARNESS_NORETURN void PDEnterDebugger(char* pStr);
 
 // Added function
 br_material* PDMissingMaterial(char* name);

src/harness/io_platforms/sdl_gl.c

@@ -169,7 +169,7 @@ tRenderer* Window_Create(char* title, int width, int height, int pRender_width,
         SDL_WINDOW_OPENGL | SDL_WINDOW_RESIZABLE);
 
     if (window == NULL) {
-        LOG_PANIC("Failed to create window");
+        LOG_PANIC("Failed to create window. %s", SDL_GetError());
     }
 
     sdl_window_scale.x = ((float)pRender_width) / width;