[saco] Implement/match FUNC_100B44E0, FUNC_100B6470, VectorScale, FUNC_100B51E0 and FUNC_100B5180; the quaternion norm needs its tail sum parenthesised or MSVC folds the first square to the top of the x87 stack

saco/game/util.cpp

@@ -1655,3 +1655,62 @@ void __stdcall FUNC_100B4730(int iModel, WORD wValue)
 		_asm mov [edx+8], bx
 	}
 }
+
+//-----------------------------------------------------------
+
+BOOL __stdcall FUNC_100B44E0(DWORD *pModelInfo)
+{
+	if(pModelInfo && (*pModelInfo == 0x85BBF0 || *pModelInfo == 0x85BC30 ||
+		*pModelInfo == 0x85BC70 || *pModelInfo == 0x85BCB0 || *pModelInfo == 0x85BCF0))
+	{
+		return TRUE;
+	}
+	return FALSE;
+}
+
+//-----------------------------------------------------------
+
+WORD FUNC_100B6470(int a1, int a2, int a3, int a4, int a5)
+{
+	if(!a1) return 0;
+
+	WORD wRet = 0;
+
+	_asm lea edx, a1
+	_asm xor eax, eax
+	_asm mov ax, [edx+0x12]
+	_asm mov wRet, ax
+
+	return wRet;
+}
+
+//-----------------------------------------------------------
+
+void VectorScale(VECTOR *vecOut, VECTOR *vecIn, float fScale)
+{
+	vecOut->X = fScale * vecIn->X;
+	vecOut->Y = fScale * vecIn->Y;
+	vecOut->Z = fScale * vecIn->Z;
+}
+
+//-----------------------------------------------------------
+
+void FUNC_100B51E0(int a1, int a2)
+{
+	DWORD dwFunc = (iGtaVersion != GTASA_VERSION_USA10) ? 0x7EB600 : 0x7EB5C0;
+
+	_asm push a2
+	_asm push a1
+	_asm mov eax, dwFunc
+	_asm call eax
+	_asm pop edx
+	_asm pop edx
+}
+
+//-----------------------------------------------------------
+
+float FUNC_100B5180(float *pQuat)
+{
+	return pQuat[0] * pQuat[0] + (pQuat[1] * pQuat[1] + pQuat[2] * pQuat[2] +
+		pQuat[3] * pQuat[3]);
+}

saco/game/util.h

@@ -140,6 +140,11 @@ void __stdcall FUNC_100B4630(int iModel, int a2); // .text:100B4630
 DWORD __stdcall FUNC_100B46D0(int iModel); // .text:100B46D0
 WORD __stdcall FUNC_100B4700(int iModel); // .text:100B4700
 void __stdcall FUNC_100B4730(int iModel, WORD wValue); // .text:100B4730
+BOOL __stdcall FUNC_100B44E0(DWORD *pModelInfo); // .text:100B44E0
+WORD FUNC_100B6470(int a1, int a2, int a3, int a4, int a5); // .text:100B6470
+void VectorScale(VECTOR *vecOut, VECTOR *vecIn, float fScale); // .text:100B51B0
+void FUNC_100B51E0(int a1, int a2); // .text:100B51E0
+float FUNC_100B5180(float *pQuat); // .text:100B5180
 void FUNC_100B5210(int a1, void *a2); // .text:100B5210, __cdecl: the caller's
 // stack cleanup is folded into the next call's argument setup