Technology virtual world to the user,such as sight,hearing,and touch..The

Technology is very close to our lives.Technology isable to help us in any circumsatnces ,such as for recreativepurpose,educational purpose,or even helps our day-to-day needs.and for therecreative one,Virtual reality is becoming a warm conversation between peoplerigth now. Virtual Reality or you can called it VR is a technology that canmake the user get to interact with the virtual world that simulated by thecomputer,so the user will feel “living” on that world.             Theadvantages that Virtual Reality have and no other gadgets have is incombination with physical environments or props, it can generate realisticimages, sounds and other sensations that simulate a user’s physical presence ina virtual or imaginary environment.It will stimulates our sense of sight andhearing too.

            Toget the maximum experience of using the virtual reality, you have to make sureyou got the other support device such as headset,to get the atmoshphere in it,Controller,to be able to touch something in the game just like our hands,thats the primarydevice you need to have,the secondary device you dont need to have but you canhave it if you want,you may buy the walker, and the suit,to get the feeling ofbeing hit or something like that.            Thereare four element in virtual reality(quoted from “Wirtual Reality danPerkembangannya”,,15 January 2018).The first element ofvirtual reality is.virtual world, its a world that was made by the programmerwhere we will play on.

The second elemet of virtual reality is immersion, its asensation that could make us feel the world inside even though it just a worldmade by the programmer or we      can call it a  fictitious world..Immersion is divided by  two,first is mental impression that cause ourmental to   feel the world inside,andphysical immersion where  we could feelphysically living in that world. Thethe third element of virtual reality is,Sensory Feedback its use to send theinfromation from the virtual world to the user,such as sight,hearing,and touch..Thefoutrth element is interactivity its  theresponse of the user that send into the virtual world so  it can interact with the user.            Howthe VR works,its usually called with HMD or head mounted display.

if you have noaudio or hand tracking,using a google cardboard is enough to get you halfimmersed.            Thepurpose of VR is to make the real 3D virtual environment in front of your eyes.butthis is unlike augmented reality because it doesn’t overlay its picture intoour real world.            Thevideo is sent from the computer using a HDMI cables in the case of headsetssuch as HTC’s Vive and Rift,or there are the one that already smartphoneslotted such as Samsung Galaxy VR and many more            VRheadsets use either to feeds sent to one display or two LCD display,and thereis also lenses that are placed between our eyes.It can be adjusted to match thedistance between your eyes,because everyone’s eyes are different.

            Thenthosse lenses focus and reshape the picture for each eye and create astereoscopic 3D image by angling the two 2D images to mimic how each of our twoeyes views the world ever-so-slightly differently.You might want to try closingyour eyes and switch to the other while seeing and individual objectsmoving,you will know what am i talking about right now.             VR headset can do 100 or 110 degree field ofview beacuse VR has to make us feel the immersion to increase ourexperience,and they didn’t use 360 degree display,even though it will look verygood,still it’s expensive and maybe unacessary.110 or 110 degree is enough            Anda little more to get the promising picture,60 fps is needed to avoid the usersfeeling sick cause it will make our eyes confused.Some Headsets even go beyondthis like Oculus can do 90 fps, Playstation’s VR can reach 120fps.

            Nowlet’s talk about Head Tracking. Head tracking means that when you wear a VRheadset, the picture in front of you will move where ever your head go such aslook up,down,and other way.There is a system called 6DoF ( Six Degree of Freedom)that plots your head in terms of your X,Y,Z axis to measure your head movemntsand usually it’s called pitch,yaw,and roll.

                        Head-tracking tech needs low latencyto be effect Why? Because head tracking is one big advantage the premiumheadsets have over the likes of Cardboard other mobile VR headsets. The big VRdevelopers are still working out motion tracking. When you look at VR stuff.You wanted to see other world that you never came before            Andfinally, headphones can be used to increase the sense of immersion. From theaudio. Because the developer make the sound like goes surround them like Dolby7.

1 speakers,so if there is a sound from your right,only your right ears canhear it and vice will make us sure where is the sound come from.            Fora while, we’ve seen the Leap Motion accessory – which uses an infrared sensorto track hand movements . So not just head that can see other world. We cantouch and also feel like we are on the other side of the world            OculusTouch is a set of wireless controllers designed to make you feel like you’reusing your own hands in VR. You grab each controller and use buttons,thumbsticks and triggers during VR games. But there is a problem from this. Unot really use your hand.

Feel touching something not that far, but we can hopescientist will make one of them So, for instance, to shoot a gun you squeeze onthe hand trigger. There is also a matrix of sensors on each controller todetect gestures such as pointing and waving. .

            Otherinput methods can include anything from hooking an Xbox controller or joystickup to your PC, voice controls, smart gloves and treadmills such as the VirtuixOmni, which allow you to “walk” in that world            Sincelast year,many company doing a virtual reality technology development,for thosewho didn’t know there are many uses of this technology:like VR uses for video games.The first is, Playing gamesusing VR will be very exciting because we can feel the excitement in the game.The second,  VR uses for watching  a movie with VR, of course the feeling mustbe different.we can feel the real atmoshphere of the film.

The third, Militarytraining, now, soldier can train with VR too,they can go to war in VR world anddoesnt need to go to the real war.The fourth, Watching a concert throughyoutube.Now you dont need to go further to watch a concert with the band youlike on the youtube canal, and with VR we can feel other people excitement inthere.

The fifth, Rugby Players using VR to practice.A team call Dallas Rugbyhas implemented VR training on their list,the uses of it to simulate a realmatch and studying the tactics.the sixth,VR for the treatment post trauma likesoldiers who had just returned home after the war.

            Atthe very least, what is obvious is VR will changing how to enjoy entertainmentsuch as playing games and watching videos.In the future,could it be with thevirtual reality we will be able to enter into a virtual world like the matrixand others, we are hoping that VR will developted better and better so that thenext generation will feel the enjoyment of VR.