package physics_sys

import (
	"github.com/yohamta/donburi/filter"
	"joylink.club/ecs"
	"joylink.club/rtsssimulation/component"
	"joylink.club/rtsssimulation/consts"
)

type TwoPositionMovementSys struct {
	query *ecs.Query
}

func NewTwoPositionMovementSys() *TwoPositionMovementSys {
	return &TwoPositionMovementSys{
		query: ecs.NewQuery(filter.Contains(component.TwoPositionTransformType)),
	}
}

// 更新位置
func (tp *TwoPositionMovementSys) Update(w ecs.World) {
	tp.query.Each(w, func(entry *ecs.Entry) {
		position := component.TwoPositionTransformType.Get(entry)
		if position.Speed != 0 {
			position.Pos += position.Speed
			if position.Pos < consts.PosMin {
				position.Pos = consts.PosMin
			} else if position.Pos > consts.PosMax {
				position.Pos = consts.PosMax
			}
		}
	})
}