Name Operation Stealth's global variables 251 and 252 and init them in main loop.

These are used as a sort of a backup for the
mouse position (x, y) variables 249 and 250.

Future Wars's VAR_MOUSE_Y_MODE and Operation Stealth's
VAR_MOUSE_X_POS_2ND (251) clash and that's possibly
why executePlayerInput currently works incorrectly
with Operation Stealth. More reverse engineering
is needed...

svn-id: r41915

3 files changed, 12 insertions, 10 deletions

diff --git a/engines/cine/cine.h b/engines/cine/cine.h
index bf56e9189b..1031d6d449 100644
--- a/engines/cine/cine.h
+++ b/engines/cine/cine.h
@@ -127,11 +127,15 @@ extern CineEngine *g_cine;
 #define COPY_PROT_FAIL_PRC_NAME "L201.ANI"
 
 enum {
-	VAR_MOUSE_X_MODE = 253,
+	// Both FW and OS
 	VAR_MOUSE_X_POS = 249,
-	VAR_MOUSE_Y_MODE = 251,
 	VAR_MOUSE_Y_POS = 250,
+	// FW only
+	VAR_MOUSE_X_MODE = 253,
+	VAR_MOUSE_Y_MODE = 251,
 	// OS only
+	VAR_MOUSE_X_POS_2ND = 251, // Many times used in conjunction with VAR_MOUSE_X_POS
+	VAR_MOUSE_Y_POS_2ND = 252, // Many times used in conjunction with VAR_MOUSE_Y_POS
 	VAR_BYPASS_PROTECTION = 255,
 	VAR_LOW_MEMORY = 0
 };
diff --git a/engines/cine/main_loop.cpp b/engines/cine/main_loop.cpp
index c6bca84e46..44e4e43a6c 100644
--- a/engines/cine/main_loop.cpp
+++ b/engines/cine/main_loop.cpp
@@ -288,6 +288,8 @@ void CineEngine::mainLoop(int bootScriptIdx) {
 		globalVars[VAR_MOUSE_X_POS] = 0;
 		globalVars[VAR_MOUSE_Y_POS] = 0;
 		if (g_cine->getGameType() == Cine::GType_OS) {
+			globalVars[VAR_MOUSE_X_POS_2ND] = 0;
+			globalVars[VAR_MOUSE_Y_POS_2ND] = 0;
 			globalVars[VAR_BYPASS_PROTECTION] = 0; // set to 1 to bypass the copy protection
 			globalVars[VAR_LOW_MEMORY] = 0; // set to 1 to disable some animations, sounds etc.
 		}
diff --git a/engines/cine/various.cpp b/engines/cine/various.cpp
index 1ec558c217..7192afcd92 100644
--- a/engines/cine/various.cpp
+++ b/engines/cine/various.cpp
@@ -1095,8 +1095,8 @@ uint16 executePlayerInput(void) {
 	// This fixes swimming at the bottom of the ocean after
 	// having been thrown into it with the girl.
 	if (g_cine->getGameType() == Cine::GType_OS) {
-		globalVars[251] = globalVars[VAR_MOUSE_X_POS];
-		globalVars[252] = globalVars[VAR_MOUSE_Y_POS];
+		globalVars[VAR_MOUSE_X_POS_2ND] = globalVars[VAR_MOUSE_X_POS];
+		globalVars[VAR_MOUSE_Y_POS_2ND] = globalVars[VAR_MOUSE_Y_POS];
 	}
 
 	return var_5E;
@@ -1501,10 +1501,7 @@ void processSeqListElement(SeqListElement &element) {
 				if (xMoveKeyb != kKeybMoveRight) {
 					adder = -adder;
 				}
-				// FIXME: In Operation Stealth's disassembly global variable 251 is used here
-				//        but it's named as VAR_MOUSE_Y_MODE in ScummVM. Is it correct or a
-				//        left over from Future Wars's reverse engineering?
-				globalVars[VAR_MOUSE_X_POS] = globalVars[251] = ptr1[4] + x + adder;
+				globalVars[VAR_MOUSE_X_POS] = globalVars[VAR_MOUSE_X_POS_2ND] = ptr1[4] + x + adder;
 			}
 
 			if (yMoveKeyb && allowPlayerInput) {
@@ -1512,8 +1509,7 @@ void processSeqListElement(SeqListElement &element) {
 				if (yMoveKeyb != kKeybMoveDown) {
 					adder = -adder;
 				}
-				// TODO: Name currently unnamed global variable 252
-				globalVars[VAR_MOUSE_Y_POS] = globalVars[252] = ptr1[5] + y + adder;
+				globalVars[VAR_MOUSE_Y_POS] = globalVars[VAR_MOUSE_Y_POS_2ND] = ptr1[5] + y + adder;
 			}
 
 			if (globalVars[VAR_MOUSE_X_POS] || globalVars[VAR_MOUSE_Y_POS]) {