OpenDiablo2/d2common/d2fileformats/d2ds1/wall_record.go

package d2ds1

import (
	"github.com/OpenDiablo2/OpenDiablo2/d2common/d2datautils"
	"github.com/OpenDiablo2/OpenDiablo2/d2common/d2enum"
)

// WallRecord represents a wall record.
type WallRecord struct {
	Type        d2enum.TileType
	Zero        byte
	Prop1       byte
	Sequence    byte
	Unknown1    byte
	Style       byte
	Unknown2    byte
	hidden      byte
	RandomIndex byte
	YAdjust     int
}

// Hidden returns if wall is hidden
func (w *WallRecord) Hidden() bool {
	return w.hidden > 0
}

// Encode adds wall's record's bytes into stream writer given
func (w *WallRecord) Encode(sw *d2datautils.StreamWriter) {
	sw.PushBits32(uint32(w.Prop1), 8)
	sw.PushBits32(uint32(w.Sequence), 6)
	sw.PushBits32(uint32(w.Unknown1), 6)
	sw.PushBits32(uint32(w.Style), 6)
	sw.PushBits32(uint32(w.Unknown2), 5)
	sw.PushBits32(uint32(w.hidden), 1)
}

// Decode decodes wall record
func (w *WallRecord) Decode(dw uint32) {
	w.Prop1 = byte(dw & 0x000000FF)            //nolint:gomnd // Bitmask
	w.Sequence = byte((dw & 0x00003F00) >> 8)  //nolint:gomnd // Bitmask
	w.Unknown1 = byte((dw & 0x000FC000) >> 14) //nolint:gomnd // Bitmask
	w.Style = byte((dw & 0x03F00000) >> 20)    //nolint:gomnd // Bitmask
	w.Unknown2 = byte((dw & 0x7C000000) >> 26) //nolint:gomnd // Bitmask
	w.hidden = byte((dw & 0x80000000) >> 31)   //nolint:gomnd // Bitmask
}