Fix skill checks for backgrounds during IMP creation

fixed checks for major and minor traits determining available IMP backgrounds

edited disability trait case HEAT INTOLERANT

added case DEAF at disability traits

Laptop/IMP Background.cpp

@@ -17,6 +17,7 @@
 	#include "IMP Compile Character.h"
 	#include "IMP Disability Trait.h"
     #include "IMP Character Trait.h"
+    #include "IMP Minor Trait.h"
 	#include "GameSettings.h"
 	#include "Interface.h"
 
@@ -602,6 +603,11 @@ void ResetDisplaySkills()
 
 extern INT32 SkillsList[ ATTITUDE_LIST_SIZE ];
 
+extern BOOLEAN	gfSkillTraitQuestions[20];
+extern BOOLEAN	gfSkillTraitQuestions2[20];
+
+extern BOOLEAN	gfMinorTraitQuestions[IMP_SKILL_TRAITS_NEW_NUMBER_MINOR_SKILLS];
+
 BOOLEAN IsBackGroundAllowed( UINT16 ubNumber )
 {
 	if ( !ubNumber  )
@@ -613,6 +619,122 @@ BOOLEAN IsBackGroundAllowed( UINT16 ubNumber )
 	else if ( !fCharacterIsMale && zBackground[ ubNumber ].uiFlags & BACKGROUND_NO_FEMALE )
 		return FALSE;
 
+	/* kitty: fixed following skillcheck
+	* the previous used "SkillList" and the after-remap naming convention (i.e. DOCTOR_NT) didn't work in this place/point of character creation
+	* left the out-commented previous code for reference and potential rollback
+	* used distinctive single and dual trait for major traits to allow for possible future finetuning by trait level
+	* 2023/08/30
+	*/
+
+	// major traits  (single-trait and dual-trait)
+	if (gfSkillTraitQuestions[IMP_SKILL_TRAITS_NEW_HEAVY_WEAPONS] || gfSkillTraitQuestions2[IMP_SKILL_TRAITS_NEW_HEAVY_WEAPONS])
+	{
+
+		if (gfSkillTraitQuestions[IMP_SKILL_TRAITS_NEW_HEAVY_WEAPONS] && gfSkillTraitQuestions2[IMP_SKILL_TRAITS_NEW_HEAVY_WEAPONS])
+		{
+			if (zBackground[ubNumber].value[BG_ARTILLERY] > 0) //dual trait (expert)
+				return FALSE;
+		}
+		else
+		{
+			if (zBackground[ubNumber].value[BG_ARTILLERY] > 0) //single trait
+				return FALSE;
+		}
+	}
+
+	if (gfSkillTraitQuestions[IMP_SKILL_TRAITS_NEW_PROF_SNIPER] || gfSkillTraitQuestions2[IMP_SKILL_TRAITS_NEW_PROF_SNIPER])
+	{
+
+		if (gfSkillTraitQuestions[IMP_SKILL_TRAITS_NEW_PROF_SNIPER] && gfSkillTraitQuestions2[IMP_SKILL_TRAITS_NEW_PROF_SNIPER])
+		{
+			if (zBackground[ubNumber].value[BG_PERC_CTH_MAX] < 0)  //dual trait (expert)
+				return FALSE;
+		}
+		else
+		{
+			if (zBackground[ubNumber].value[BG_PERC_CTH_MAX] < 0)  //single trait
+				return FALSE;
+		}
+	}
+
+	if (gfSkillTraitQuestions[IMP_SKILL_TRAITS_NEW_MARTIAL_ARTS] || gfSkillTraitQuestions2[IMP_SKILL_TRAITS_NEW_MARTIAL_ARTS])
+	{
+
+		if (gfSkillTraitQuestions[IMP_SKILL_TRAITS_NEW_MARTIAL_ARTS] && gfSkillTraitQuestions2[IMP_SKILL_TRAITS_NEW_MARTIAL_ARTS])
+		{
+			if (zBackground[ubNumber].value[BG_PERC_DAMAGE_MELEE] < 0)  //dual trait (expert)
+				return FALSE;
+		}
+		else
+		{
+			if (zBackground[ubNumber].value[BG_PERC_DAMAGE_MELEE] < 0)  //single trait
+				return FALSE;
+		}
+	}
+
+	if (gfSkillTraitQuestions[IMP_SKILL_TRAITS_NEW_TECHNICIAN] || gfSkillTraitQuestions2[IMP_SKILL_TRAITS_NEW_TECHNICIAN])
+	{
+
+		if (gfSkillTraitQuestions[IMP_SKILL_TRAITS_NEW_TECHNICIAN] && gfSkillTraitQuestions2[IMP_SKILL_TRAITS_NEW_TECHNICIAN])
+		{
+			if (zBackground[ubNumber].value[BG_MECHANICAL] < 0)  //dual trait (expert)
+				return FALSE;
+		}
+		else
+		{
+			if (zBackground[ubNumber].value[BG_MECHANICAL] < 0)  //single trait
+				return FALSE;
+		}
+	}
+
+	if (gfSkillTraitQuestions[IMP_SKILL_TRAITS_NEW_DOCTOR] || gfSkillTraitQuestions2[IMP_SKILL_TRAITS_NEW_DOCTOR])
+	{
+
+		if (gfSkillTraitQuestions[IMP_SKILL_TRAITS_NEW_DOCTOR] && gfSkillTraitQuestions2[IMP_SKILL_TRAITS_NEW_DOCTOR])
+		{
+			if (zBackground[ubNumber].value[BG_MEDICAL] < 0)  //dual trait (expert)
+				return FALSE;
+		}
+		else
+		{
+			if (zBackground[ubNumber].value[BG_MEDICAL] < 0)  //single trait
+				return FALSE;
+		}
+	}
+
+	// minor traits (single trait only)
+	if (gfMinorTraitQuestions[IMP_SKILL_TRAITS_NEW_MELEE])
+	{
+		if (zBackground[ubNumber].value[BG_PERC_CTH_BLADE] < 0) //single trait
+			return FALSE;
+	}
+
+	if (gfMinorTraitQuestions[IMP_SKILL_TRAITS_NEW_STEALTHY])
+	{
+		if (zBackground[ubNumber].value[BG_PERC_STEALTH] < 0)
+			return FALSE;
+	}
+
+	if (gfMinorTraitQuestions[IMP_SKILL_TRAITS_NEW_ATHLETICS])
+	{
+		if (zBackground[ubNumber].value[BG_PERC_SPEED_RUNNING] < 0)
+			return FALSE;
+	}
+
+	if (gfMinorTraitQuestions[IMP_SKILL_TRAITS_NEW_DEMOLITIONS])
+	{
+		if (zBackground[ubNumber].value[BG_EXPLOSIVE_ASSIGN] < 0)
+			return FALSE;
+	}
+
+	if (gfMinorTraitQuestions[IMP_SKILL_TRAITS_NEW_SURVIVAL])
+	{
+		if (zBackground[ubNumber].value[BG_PERC_CAMO] < 0)
+			return FALSE;
+	}
+
+	/* previous code for reference
+	*
 	if ( SkillsList[0] == HEAVY_WEAPONS_NT || SkillsList[1] == HEAVY_WEAPONS_NT || SkillsList[2] == HEAVY_WEAPONS_NT )
 	{
 		if ( zBackground[ ubNumber ].value[BG_ARTILLERY] > 0 )
@@ -672,11 +794,18 @@ BOOLEAN IsBackGroundAllowed( UINT16 ubNumber )
 		if ( zBackground[ ubNumber ].value[BG_EXPLOSIVE_ASSIGN] < 0 )
 			return FALSE;
 	}
+	*/
+
+	/*kitty:
+	* added BG_TROPICAL to case HEAT_INTOLERANT - since tropical sector also is part of "MercIsHot"+HEAT_INTOLERANT (SoldierProfile.cpp), like desert
+	* added case DEAF - if merc is deaf, granting any bonus to hearing seems implausible
+	* 2023/08/30
+	*/
 
 	switch ( iChosenDisabilityTrait() )
 	{
 	case HEAT_INTOLERANT:
-		if ( zBackground[ ubNumber ].value[BG_DESERT] > 0 )
+		if ( zBackground[ ubNumber ].value[BG_DESERT] > 0 || zBackground[ ubNumber ].value[BG_TROPICAL] > 0 )
 			return FALSE;
 		break;
 	case NERVOUS:
@@ -701,8 +830,12 @@ BOOLEAN IsBackGroundAllowed( UINT16 ubNumber )
 		if ( zBackground[ ubNumber ].value[BG_LEADERSHIP] > 0 )
 			return FALSE;
 		break;
+	case DEAF:
+		if (zBackground[ ubNumber ].value[BG_PERC_HEARING_NIGHT] > 0 || zBackground[ ubNumber ].value[BG_PERC_HEARING_DAY] > 0)
+			return FALSE;
+		break;
 	case AFRAID_OF_HEIGHTS:
-		if ( zBackground[ubNumber].value[BG_HEIGHT] > 0 )
+		if ( zBackground[ ubNumber ].value[BG_HEIGHT] > 0 )
 			return FALSE;
 		break;
 	default: