Method Encode

physicscompress2/physics/encoding.go:36–97

()

var totalbits = 0

func (s *State) Encode() []byte {
	enc := arith.NewEncoder()

	historic := s.Historic().Cubes
	_ = historic
	baseline := s.Baseline().Cubes
	current := s.Current().Cubes

	mzeros := mZeros()
	items := []int{}
	for i := range current {
		cube, base := &current[i], &baseline[i]
		if *cube == *base {
			mzeros.Encode(enc, 0)
		} else {
			mzeros.Encode(enc, 1)
			items = append(items, i)
		}
	}

	for _, i := range items {
		cube := &current[i]
		v := uint(1)
		if cube.Interacting {
			v = 0
		}
		mzeros.Encode(enc, v)
	}

	props := IndexProps(items, len(baseline))
	SortByZ(props, Props(baseline))
	getProp := Props(current)

	max := uint64(0)
	for _, i := range props {
		ext := uint64(bit.ZEncode(int64(getProp(i))))
		if max < ext {
			max = ext
		}
	}

	if max == 0 {
		mzeros.Encode(enc, 1)
		enc.Close()
		return enc.Bytes()
	}

	nbits := bit.ScanRight(max) + 1
	for i := 0; i < int(nbits); i += 1 {
		mzeros.Encode(enc, 0)
	}
	mzeros.Encode(enc, 1)

	mvalues := mValues(nbits)
	for _, i := range props {
		val := uint(bit.ZEncode(int64(getProp(i))))
		mvalues.Encode(enc, val)
	}