package model

import (
	"math"
	"roserver/serverproto"
)

const (
	Eepsilon = 0.0004
)

type Direction3D struct {
	//x=roll,y=pitch,z=yaw
	dir serverproto.Vector3
}

func (this *Direction3D) roll() float32 {
	return this.dir.X
}
func (this *Direction3D) pitch() float32 {
	return this.dir.Y
}
func (this *Direction3D) yaw() float32 {
	return this.dir.Z
}
func (this *Direction3D) setRoll(val float32) {
	this.dir.X = val
}
func (this *Direction3D) setPitch(val float32) {
	this.dir.Y = val
}
func (this *Direction3D) setYaw(val float32) {
	this.dir.Z = val
}

func almostEqual(f1, f2 float32) bool {
	return math.Abs(float64(f1-f2)) < Eepsilon
}

//v1 - v2
func Vector3Sub(v1, v2 *serverproto.Vector3) *serverproto.Vector3 {
	retVec3 := &serverproto.Vector3{}
	retVec3.X = v1.X - v2.X
	retVec3.Y = v1.Y - v2.Y
	retVec3.Z = v1.Z - v2.Z
	return retVec3
}

//v1 + v2
func Vector3Add(v1, v2 *serverproto.Vector3) *serverproto.Vector3 {
	retVec3 := &serverproto.Vector3{}
	retVec3.X = v1.X + v2.X
	retVec3.Y = v1.Y + v2.Y
	retVec3.Z = v1.Z + v2.Z
	return retVec3
}

//vector3 len
func Vector3Len(v *serverproto.Vector3) float32 {
	return float32(math.Sqrt(float64(v.X*v.X + v.Y*v.Y + v.Z*v.Z)))
}