Feature d2datadict difficultylevels (#363)

* adding rules for swap files to .gitignore

* main, d2common: load Magic/Rare/Unique Affix

* d2common: item affixes only

removed Rare/Unique Prefix/Suffix as those are related to monsters, not items.

* removed debug print from item_affix.go

* changed item affix type names for clarity, removed debug print from data_dictionary

* d2common: item affix datadict and records

Item Affixes are defined in `/data/global/excel/Magic{Prefix,Suffix}.txt`
Rare and Unique Pre/Suffixes seem to be for monsters, not items.

d2common: item affixes only

removed Rare/Unique Prefix/Suffix as those are related to monsters, not items.

removed debug print from item_affix.go

changed item affix type names for clarity, removed debug print from data_dictionary

* reverting to pre-allocating memory for parsing txt lines

* removing the rest of the rare/unique definitions

* removing the rest of the rare/unique definitions

* adding ItemStatCost data dict loader

* adding data dict loader for difficulty levels

d2common/d2data/d2datadict/difficultylevels.go

@@ -0,0 +1,123 @@
+package d2datadict
+
+import (
+	"log"
+
+	"github.com/OpenDiablo2/OpenDiablo2/d2common"
+)
+
+var DifficultyLevels map[string]*DifficultyLevelRecord
+
+type DifficultyLevelRecord struct {
+	// Difficulty name. it is hardcoded and you cannot add new ones unless you do
+	// some Code Edits
+	Name string // Name
+
+	// Resistance penalty in the current difficulty.
+	ResistancePenalty int // ResistPenalty
+
+	// The percentage of experience you lose when you die on this difficulty.
+	DeathExperiencePenalty int // DeathExpPenalty
+
+	// Not Used. Pre 1.07 it was the percentage of low quality, normal, superior and
+	// exceptional items dropped on this difficulty.
+	DropChanceLow         int // UberCodeOddsNormal
+	DropChanceNormal      int // UberCodeOddsNormal
+	DropChanceSuperior    int // UberCodeOddsNormal
+	DropChanceExceptional int // UberCodeOddsNormal
+	// Gravestench - I'm splitting this field because I feel it's incoherent
+	// to keep all of those drop chances together, even if it is that way in the
+	// txt file...
+
+	// Not used. Pre 1.07 it was the percentage of magic, rare, set and unique
+	// exceptional items dropped on this difficuly.
+	DropChanceMagic  int // UberCodeOddsGood
+	DropChanceRare   int // UberCodeOddsGood
+	DropChanceSet    int // UberCodeOddsGood
+	DropChanceUnique int // UberCodeOddsGood
+	// Gravestench - same as my above comment
+
+	// Not used and didn't exist pre 1.07.
+	// UltraCodeOddsNormal
+
+	// Additional skill points added to monster skills specified in MonStats.txt
+	// for this difficulty. It has nothing to do with the missile damage bonus.
+	MonsterSkillBonus int // MonsterSkillBonus
+
+	// This value is a divisor, and so never set it to 0. It applies to the monster
+	// freezing length and cold length duration.
+	MonsterColdDivisor   int // MonsterColdDivisor
+	MonsterFreezeDivisor int // MonsterFreezeDivisor
+
+	// These values are divisor and they're used respectively for AI altering states
+	AiCurseDivisor   int // AiCurseDivisor
+	LifeStealDivisor int // LifeStealDivisor
+	ManaStealDivisor int // ManaStealDivisor
+
+	// -----------------------------------------------------------------------
+	// Gravestench: The rest of these are listed on PK page, but not present in
+	// my copy of the txt file (patch_d2/data/global/excel/difficultylevels.txt)
+	// so I am going to leave these comments
+
+	// Effective percentage of damage and attack rating added to Extra Strong
+	// Unique/Minion and Champion monsters. This field is actually a coefficient,
+	// as the total bonus output is BonusFromMonUMod/100*ThisField
+	// UniqueDamageBonus
+	// ChampionDamageBonus
+
+	//  This is a percentage of how much damage your mercenaries do to an Act boss.
+	// HireableBossDamagePercent
+
+	// Monster Corpse Explosion damage percent limit. Since the monsters HP grows
+	// proportionally to the number of players in the game, you can set a cap via
+	// this field.
+	// MonsterCEDamagePercent
+
+	// Maximum cap of the monster hit points percentage that can be damaged through
+	// Static Field. Setting these columns to 0 will make Static Field work the same
+	// way it did in Classic Diablo II.
+	// StaticFieldMin
+
+	// Parameters for gambling. They states the odds to find Rares, Sets, Uniques,
+	// Exceptionals and Elite items when gambling. See Appendix A
+	// GambleRare
+	// GambleSet
+	// GambleUnique
+	// GambleUber
+	// GambleUltra
+	// -----------------------------------------------------------------------
+
+}
+
+func LoadDifficultyLevels(file []byte) {
+	dict := d2common.LoadDataDictionary(string(file))
+	numRows := len(dict.Data)
+
+	DifficultyLevels = make(map[string]*DifficultyLevelRecord, numRows)
+
+	for idx, _ := range dict.Data {
+		record := &DifficultyLevelRecord{
+			Name:                   dict.GetString("Name", idx),
+			ResistancePenalty:      dict.GetNumber("ResistPenalty", idx),
+			DeathExperiencePenalty: dict.GetNumber("DeathExpPenalty", idx),
+			DropChanceLow:          dict.GetNumber("UberCodeOddsNormal", idx),
+			DropChanceNormal:       dict.GetNumber("UberCodeOddsNormal", idx),
+			DropChanceSuperior:     dict.GetNumber("UberCodeOddsNormal", idx),
+			DropChanceExceptional:  dict.GetNumber("UberCodeOddsNormal", idx),
+			DropChanceMagic:        dict.GetNumber("UberCodeOddsGood", idx),
+			DropChanceRare:         dict.GetNumber("UberCodeOddsGood", idx),
+			DropChanceSet:          dict.GetNumber("UberCodeOddsGood", idx),
+			DropChanceUnique:       dict.GetNumber("UberCodeOddsGood", idx),
+			MonsterSkillBonus:      dict.GetNumber("MonsterSkillBonus", idx),
+			MonsterColdDivisor:     dict.GetNumber("MonsterColdDivisor", idx),
+			MonsterFreezeDivisor:   dict.GetNumber("MonsterFreezeDivisor", idx),
+			AiCurseDivisor:         dict.GetNumber("AiCurseDivisor", idx),
+			LifeStealDivisor:       dict.GetNumber("LifeStealDivisor", idx),
+			ManaStealDivisor:       dict.GetNumber("ManaStealDivisor", idx),
+		}
+		DifficultyLevels[record.Name] = record
+	}
+
+	log.Printf("Loaded %d DifficultyLevel records", len(DifficultyLevels))
+
+}

d2common/d2resource/resource_paths.go

@@ -177,6 +177,7 @@ const (
 	SoundSettings        = "/data/global/excel/Sounds.txt"
 	ItemStatCost         = "/data/global/excel/ItemStatCost.txt"
 	Hireling             = "/data/global/excel/hireling.txt"
+	DifficultyLevels     = "/data/global/excel/difficultylevels.txt"
 
 	// --- Animations ---
 

main.go

@@ -401,6 +401,7 @@ func loadDataDict() error {
 		{d2resource.Hireling, d2datadict.LoadHireling},
 		{d2resource.Experience, d2datadict.LoadExperienceBreakpoints},
 		{d2resource.Gems, d2datadict.LoadGems},
+		{d2resource.DifficultyLevels, d2datadict.LoadDifficultyLevels},
 	}
 
 	for _, entry := range entries {