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Ball in the hole. Focus Secret

Spectacular tricks and their clues

Directory / Spectacular tricks and their clues

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Focus Description:

You are holding a decorated wooden egg on a stand. The top half of the egg is removable and hollow. After removing it, show the audience inside the egg a wooden ball (half). Then put the top half of the egg in its original place, tap on it with a "magic wand" and remove it again. The ball has disappeared, and an empty hole is visible in its place.

Focus Ball in hole

Focus secret:

The first time the upper half of the egg is removed; the second time it is the same, but with a ball (the ball consists of only half).

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Random news from the Archive

Apple creates 3D interface for iPhone and iPad 14.01.2012

In the future, the desktop of the mobile operating system Apple iOS may turn into a virtual room, and the touch screen into a window. The Sensor Based Display Environment patent application reveals the details of a 3D interface that could be used in Apple mobile products in the future. The application was filed in July 2011 and recently published by the US Patent and Trademark Office.

We are talking about ordinary 3D graphics on a flat screen without the use of a stereo effect. The iOS desktop looks like a room with a floor and ceiling, with the screen as one of the walls. There are objects on the floor and other walls that can be GUI elements. The essence of the method proposed by Apple for controlling the device is to turn its screen into a window into this room.

“Due to the limited size of a typical mobile device display, using a 3D GUI with standard tools such as a finger and pen can be inconvenient,” the application states. : one to hold the device, the other to perform manipulations. The company decided that it is possible to "twirl" 3D graphics without the help of a touch screen - but due to various sensors, for example, a position sensor in space (accelerometer) and a compass. When moving the device in space and turning it, the interface will adaptively change: for example, if the user places the mobile phone vertically and moves it to the left, the room will rotate to the right, creating the illusion of turning the head in virtual reality.

Thus, the user will be able to "look around" in the 3D iOS interface, and when the necessary interface elements (located on the floor and walls of the virtual room) fall into the field of view, select and move them with the familiar touch of the finger on the screen. In this case, the element can be grabbed with a finger and continued inspection, for example, by moving it from the floor to the ceiling.

A similar technology already exists on the market and is called augmented reality, for example in the Google Goggles app or the Street View feature in Google Maps. We also add that this is not the first time Apple has filed a patent for a 3D interface for its products. In 2009, the company proposed tracking the movement of the head in space to form a 3D image (this technology can be seen in a number of applications), and a year earlier applied for a conventional XNUMXD touch screen interface.

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