update merc

pkg/data/data.go

@@ -30,6 +30,7 @@ type Data struct {
 	Corpse           Corpse
 	Monsters         Monsters
 	Corpses          Monsters
+	Mercenary        OwnMercenary
 	Game             OnlineGame
 	PlayerUnit       PlayerUnit
 	NPCs             NPCs
@@ -100,19 +101,21 @@ func (r Room) IsInside(p Position) bool {
 }
 
 func (d Data) MercHPPercent() int {
-	for _, m := range d.Monsters {
-		if m.IsMerc() {
-			// Hacky thing to read merc life properly
-			maxLife := m.Stats[stat.MaxLife] >> 8
-			life := float64(m.Stats[stat.Life] >> 8)
-			if m.Stats[stat.Life] <= 32768 {
-				life = float64(m.Stats[stat.Life]) / 32768.0 * float64(maxLife)
-			}
+	// for _, m := range d.Monsters {
+	// 	if m.IsMerc() {
+	// 		// Hacky thing to read merc life properly
+	// 		maxLife := m.Stats[stat.MaxLife] >> 8
+	// 		life := float64(m.Stats[stat.Life] >> 8)
+	// 		if m.Stats[stat.Life] <= 32768 {
+	// 			life = float64(m.Stats[stat.Life]) / 32768.0 * float64(maxLife)
+	// 		}
 
-			return int(life / float64(maxLife) * 100)
+	// 		return int(life / float64(maxLife) * 100)
+	// 	}
+	// }
+	if d.Mercenary.Found {
+		return d.Mercenary.HPPercent
 	}
-	}
-
 	return 0
 }
 

pkg/data/npc.go

@@ -9,6 +9,18 @@ import (
 	"github.com/hectorgimenez/d2go/pkg/data/superunique"
 )
 
+type OwnMercenary struct {
+	Found       bool
+	ClassID     npc.ID
+	UnitID      UnitID
+	OwnerUnitID UnitID
+	OwnerName   string
+	Position    Position
+	Mode        mode.NpcMode
+	IsCorpse    bool
+	HPPercent   int
+}
+
 type NPC struct {
 	ID        npc.ID
 	Name      string

pkg/memory/game_reader.go

@@ -147,6 +147,9 @@ func (gd *GameReader) GetData() data.Data {
 		ActiveWeaponSlot: gd.GetActiveWeaponSlot(),
 	}
 
+	merc, foundMerc := gd.OwnMercenary()
+	merc.Found = foundMerc
+	d.Mercenary = data.OwnMercenary(merc)
 	return d
 }
 

pkg/memory/mercenary.go

@@ -0,0 +1,183 @@
+package memory
+
+import (
+	"math"
+	"sort"
+
+	"github.com/hectorgimenez/d2go/pkg/data"
+	"github.com/hectorgimenez/d2go/pkg/data/mode"
+	"github.com/hectorgimenez/d2go/pkg/data/npc"
+	"github.com/hectorgimenez/d2go/pkg/data/stat"
+)
+
+type OwnMercenary data.OwnMercenary
+
+func (m OwnMercenary) Alive() bool {
+	return m.Found && !m.IsCorpse && m.HPPercent > 0 && m.Mode != mode.NpcDeath && m.Mode != mode.NpcDead
+}
+
+func (gd *GameReader) OwnMercenary() (OwnMercenary, bool) {
+	if gd.offset.UnitTable == 0 {
+		gd.offset = calculateOffsets(gd.Process)
+	}
+
+	ownerIDs := gd.mainPlayerOwnerIDs()
+	if len(ownerIDs) == 0 {
+		return OwnMercenary{}, false
+	}
+
+	// Capture the main player name for ownership verification at the caller level.
+	mainPlayerName := gd.GetRawPlayerUnits().GetMainPlayer().Name
+
+	baseAddr := gd.Process.moduleBaseAddressPtr + gd.offset.UnitTable + 1024
+	unitTableBuffer := gd.Process.ReadBytesFromMemory(baseAddr, 128*8)
+	candidates := make([]OwnMercenary, 0)
+
+	for bucket := 0; bucket < 128; bucket++ {
+		monsterOffset := uint(8 * bucket)
+		monsterUnitPtr := uintptr(ReadUIntFromBuffer(unitTableBuffer, monsterOffset, Uint64))
+		for depth := 0; depth < 64 && monsterUnitPtr != 0; depth++ {
+			monsterDataBuffer := gd.Process.ReadBytesFromMemory(monsterUnitPtr, 0x1B0)
+			classID := npc.ID(ReadUIntFromBuffer(monsterDataBuffer, 0x04, Uint32))
+			if !isMercenaryClassID(classID) {
+				monsterUnitPtr = uintptr(gd.Process.ReadUInt(monsterUnitPtr+0x158, Uint64))
+				continue
+			}
+
+			unitDataPtr := uintptr(ReadUIntFromBuffer(monsterDataBuffer, 0x10, Uint64))
+			unitOwnerID := uint32(ReadUIntFromBuffer(monsterDataBuffer, 0x08, Uint32))
+			unitDataOwnerID := uint32(0)
+			if unitDataPtr != 0 {
+				unitDataOwnerID = uint32(gd.Process.ReadUInt(unitDataPtr+0x54, Uint32))
+			}
+			ownerID, ownerMatched := matchOwnerUnitID(ownerIDs, unitOwnerID, unitDataOwnerID)
+			if !ownerMatched {
+				monsterUnitPtr = uintptr(gd.Process.ReadUInt(monsterUnitPtr+0x158, Uint64))
+				continue
+			}
+
+			pathPtr := uintptr(ReadUIntFromBuffer(monsterDataBuffer, 0x38, Uint64))
+			xPos := int(gd.Process.ReadUInt(pathPtr+0x02, Uint16))
+			yPos := int(gd.Process.ReadUInt(pathPtr+0x06, Uint16))
+			statsListExPtr := uintptr(ReadUIntFromBuffer(monsterDataBuffer, 0x88, Uint64))
+			statPtr := uintptr(gd.Process.ReadUInt(statsListExPtr+0x30, Uint64))
+			statCount := gd.Process.ReadUInt(statsListExPtr+0x38, Uint64)
+			stats := gd.getMonsterStats(statCount, statPtr)
+
+			candidates = append(candidates, OwnMercenary{
+				Found:       true,
+				ClassID:     classID,
+				UnitID:      data.UnitID(unitOwnerID),
+				OwnerUnitID: data.UnitID(ownerID),
+				OwnerName:   mainPlayerName,
+				Position: data.Position{
+					X: xPos,
+					Y: yPos,
+				},
+				Mode:      mode.NpcMode(ReadUIntFromBuffer(monsterDataBuffer, 0x0C, Uint32)),
+				IsCorpse:  ReadUIntFromBuffer(monsterDataBuffer, 0x1AE, Uint8) != 0,
+				HPPercent: mercenaryHPPercent(stats),
+			})
+
+			monsterUnitPtr = uintptr(gd.Process.ReadUInt(monsterUnitPtr+0x158, Uint64))
+		}
+	}
+
+	if len(candidates) == 0 {
+		return OwnMercenary{}, false
+	}
+
+	// Filter candidates to only the mercenary owned by the main (local) player.
+	// In a Wine/Proton party multiple players may have IsMainPlayer=true, so the
+	// raw candidates list can contain teammates' mercenaries. We filter by the
+	// owner name captured from the main player unit before sorting.
+	ownCandidates := make([]OwnMercenary, 0, len(candidates))
+	for _, c := range candidates {
+		if c.OwnerName == mainPlayerName {
+			ownCandidates = append(ownCandidates, c)
+		}
+	}
+	if len(ownCandidates) == 0 {
+		return OwnMercenary{}, false
+	}
+
+	sort.SliceStable(ownCandidates, func(i, j int) bool {
+		if ownCandidates[i].Alive() != ownCandidates[j].Alive() {
+			return ownCandidates[i].Alive()
+		}
+		if ownCandidates[i].ClassID == npc.Guard && ownCandidates[j].ClassID != npc.Guard {
+			return true
+		}
+		if ownCandidates[i].ClassID != npc.Guard && ownCandidates[j].ClassID == npc.Guard {
+			return false
+		}
+		return ownCandidates[i].HPPercent > ownCandidates[j].HPPercent
+	})
+
+	return ownCandidates[0], true
+}
+
+func (gd *GameReader) mainPlayerOwnerIDs() map[uint32]struct{} {
+	rawPlayerUnits := gd.GetRawPlayerUnits()
+	ownerIDs := make(map[uint32]struct{})
+	for _, player := range rawPlayerUnits {
+		if !player.IsMainPlayer || player.UnitID <= 0 {
+			continue
+		}
+		if player.Area > 0 && player.Position.X > 0 && player.Position.Y > 0 {
+			ownerIDs[uint32(player.UnitID)] = struct{}{}
+		}
+	}
+	if len(ownerIDs) > 0 {
+		return ownerIDs
+	}
+	for _, player := range rawPlayerUnits {
+		if player.IsMainPlayer && player.UnitID > 0 {
+			ownerIDs[uint32(player.UnitID)] = struct{}{}
+		}
+	}
+	return ownerIDs
+}
+
+func isMercenaryClassID(classID npc.ID) bool {
+	switch classID {
+	case npc.Guard, npc.Act5Hireling1Hand, npc.Act5Hireling2Hand, npc.IronWolf, npc.Rogue2:
+		return true
+	default:
+		return false
+	}
+}
+
+func matchOwnerUnitID(ownerIDs map[uint32]struct{}, unitOwnerID, unitDataOwnerID uint32) (uint32, bool) {
+	if _, ok := ownerIDs[unitDataOwnerID]; ok {
+		return unitDataOwnerID, true
+	}
+	if _, ok := ownerIDs[unitOwnerID]; ok {
+		return unitOwnerID, true
+	}
+	return 0, false
+}
+
+func mercenaryHPPercent(stats map[stat.ID]int) int {
+	maxLife := stats[stat.MaxLife] >> 8
+	if maxLife <= 0 {
+		return 0
+	}
+
+	life := float64(stats[stat.Life] >> 8)
+	if stats[stat.Life] <= 32768 {
+		life = float64(stats[stat.Life]) / 32768.0 * float64(maxLife)
+	}
+
+	percentage := (life / float64(maxLife)) * 100
+	if math.IsNaN(percentage) || math.IsInf(percentage, 0) {
+		return 0
+	}
+	if percentage < 0 {
+		return 0
+	}
+	if percentage > 100 {
+		return 100
+	}
+	return int(percentage)
+}