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Hello CHI, I'm Youngbo Shim from HCI Lab in KAIST,
and today I would like to show the walkthrough of interactivity demo, QuadStretch.
This is Taejun, and Taejun will play a role as a participant in demo today.
This is QuadStretch device, a wearable skin stretch display for VR experience.
As you can see, 4 stretch modules surround the forearm.
For each module, the two tactors symmetrically move toward or away from each other, which generates a counter force.
This makes the device doesn’t need a bulky frame or cage that holds the device tight on the skin,
and also makes it light and flexible, which is good for wearable use.
Okay so now, I will help him wearing the QuadStretch device.
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Your hands please,
VR controller
That's all!
You could raise your hand like you're doing a real boxing in the gym.
and... if you click on the grip buttons, you can make fist inside the VR.
Great! And sustaining the fist grip, you could punch on the sand bag.
and if you punch with the right hand, you'll feel the impact on the right QuadStretch device.
and when you punch with the left hand, you'll feel the impact on the left side.
Now, you're in the archery scene.
If you look on the left hand, you'll see a bow
and... if you get close with your right hand to the bow, the arrow will appear.
and if it gleams in green lights, it means you can grab the arrow with the trigger button.
Great! Now you can pull on the arrow like you're doing in the real archery,
and as you pull on, the tension on the right QuadStretch device will go up.
And if you release the trigger button, the arrow will fly forward.
And, also the QuadStretch device will be released.
and, now you can feel free to shoot on the targets.
You can raise your right hand to see your virtual hand.
If you get on to the slingshot, it gleams in green lights. It means you can pick it up with the trigger button.
And now, you're engaged with the slingshot.
You can pull on either sides, left, right, up, down, anyways fine, and you can feel on the slingshot's tension from the QuadStretch device.
Not only the magnitude of the tension is felt, but also where are you pulling on is rendered by the QuadStretch device.
Cause it has four stretch modules.
If you release the trigger button, yes, you can shoot the small ball from the slingshot.
This is the wings scene.
If you look on the left and right arms, you can see the wings are attached on your hands
and now you can flap like, um, you are like a bird, up and down, yes.
Now you're kind of flying into the sky.
and... actually the air drags on each side of your wing is rendered by the QuadStretch device as a force.
If you look upwards, there is a boulder in front of you and there are some handles you can climb up.
If you reach the right handle with the right hand, and click on the grip button, yes, you're now engaged with the grip.
If you pull on the right hand, you're pulling up your body.
And also, if you move onto the left handle with your left hand
and pick it up.
Now you could just do and repeat this process, to go upwards
and what's going on right now is the QuadStretch device is rendering the tensions while you're gripping on or hanging on to the handles.
and also, the strength of moving upwards.
Great, now you have reach the top.
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