package attribute

import (
	"fmt"
	"math"
)

//基准倍数
const CARDINAL_NUMBER int = 10000

func NewFixedPoint(value float32) FixedPoint {
	return FixedPoint(math.Round(float64(value * float32(CARDINAL_NUMBER))))
}

type FixedPoint int

func (this FixedPoint) SetInt(v int) {
	this = FixedPoint(v)
}

func (this FixedPoint) Scalar() float32 {
	return float32(this) * 0.0001
}

func (this FixedPoint) ToInt() int {
	return int(this) / CARDINAL_NUMBER
}
func (this FixedPoint) ToFloat() float32 {
	return this.Scalar()
}
func (this FixedPoint) ToString() string {
	return fmt.Sprintf("%f", this.Scalar())
}

/// -
func (this FixedPoint) Add(v float32) {
	y := NewFixedPoint(v)
	this = FixedPoint(int(this) + int(y))
}

/// -
func (this FixedPoint) Reduce(v float32) {
	y := NewFixedPoint(v)
	this = FixedPoint(int(this) - int(y))
}

/// +
func FixedPoint_Add(x, y FixedPoint) FixedPoint {
	return FixedPoint(x + y)
}

/// -
func FixedPoint_Reduce(x, y FixedPoint) FixedPoint {
	return FixedPoint(x - y)
}

/// *
func FixedPoint_Multiply(x, y FixedPoint) FixedPoint {
	return FixedPoint((int(x) * int(y)) / CARDINAL_NUMBER)
}

/// /
func FixedPoint_Divide(x, y FixedPoint) FixedPoint {
	return FixedPoint((int(x) * CARDINAL_NUMBER) / int(y))
}