Add some memory reading stuff, based on many other open source projects

pkg/memory/object.go

@@ -0,0 +1,59 @@
+package memory
+
+import (
+	"github.com/hectorgimenez/d2go/pkg/data"
+	"github.com/hectorgimenez/d2go/pkg/data/object"
+	"github.com/hectorgimenez/d2go/pkg/utils"
+	"sort"
+)
+
+func (gd *GameReader) Objects(playerPosition data.Position) []data.Object {
+	hoveredUnitID, hoveredType, isHovered := gd.hoveredData()
+
+	baseAddr := gd.Process.moduleBaseAddressPtr + gd.offset.UnitTable + (2 * 1024)
+	unitTableBuffer := gd.Process.ReadBytesFromMemory(baseAddr, 128*8)
+
+	var objects []data.Object
+	for i := 0; i < 128; i++ {
+		objectOffset := 8 * i
+		objectUnitPtr := uintptr(ReadUIntFromBuffer(unitTableBuffer, uint(objectOffset), Uint64))
+		for objectUnitPtr > 0 {
+			objectType := gd.Process.ReadUInt(objectUnitPtr+0x00, Uint32)
+			if objectType == 2 {
+				txtFileNo := gd.Process.ReadUInt(objectUnitPtr+0x04, Uint32)
+				mode := gd.Process.ReadUInt(objectUnitPtr+0x0c, Uint32)
+				unitID := gd.Process.ReadUInt(objectUnitPtr+0x08, Uint32)
+
+				// Coordinates (X, Y)
+				pathPtr := uintptr(gd.Process.ReadUInt(objectUnitPtr+0x38, Uint64))
+				posX := gd.Process.ReadUInt(pathPtr+0x10, Uint16)
+				posY := gd.Process.ReadUInt(pathPtr+0x14, Uint16)
+
+				unitDataPtr := uintptr(gd.Process.ReadUInt(objectUnitPtr+0x10, Uint64))
+				interactType := gd.Process.ReadUInt(unitDataPtr+0x08, Uint8)
+
+				obj := data.Object{
+					Name:         object.Name(int(txtFileNo)),
+					IsHovered:    unitID == hoveredUnitID && hoveredType == 2 && isHovered,
+					InteractType: object.InteractType(interactType),
+					Selectable:   mode == 0,
+					Position: data.Position{
+						X: int(posX),
+						Y: int(posY),
+					},
+				}
+				objects = append(objects, obj)
+			}
+			objectUnitPtr = uintptr(gd.Process.ReadUInt(objectUnitPtr+0x150, Uint64))
+		}
+	}
+
+	sort.SliceStable(objects, func(i, j int) bool {
+		distanceI := utils.DistanceFromPoint(playerPosition, objects[i].Position)
+		distanceJ := utils.DistanceFromPoint(playerPosition, objects[j].Position)
+
+		return distanceI < distanceJ
+	})
+
+	return objects
+}