Method read3BitNormal

reader.go:361–389

read3BitNormal reads a normalized float vector

()

// read3BitNormal reads a normalized float vector
func (r *reader) read3BitNormal() []float32 {
	ret := []float32{0.0, 0.0, 0.0}

	hasX := r.readBoolean()
	haxY := r.readBoolean()

	if hasX {
		ret[0] = r.readNormal()
	}

	if haxY {
		ret[1] = r.readNormal()
	}

	negZ := r.readBoolean()
	prodsum := ret[0]*ret[0] + ret[1]*ret[1]

	if prodsum < 1.0 {
		ret[2] = float32(math.Sqrt(float64(1.0 - prodsum)))
	} else {
		ret[2] = 0.0
	}

	if negZ {
		ret[2] = -ret[2]
	}

	return ret
}

// readBitsAsBytes reads the given number of bits in groups of bytes
func (r *reader) readBitsAsBytes(n uint32) []byte {