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Calculation of coordinates indicated by a handheld pointing device

  • US 9,079,102 B2
  • Filed: 05/27/2009
  • Issued: 07/14/2015
  • Est. Priority Date: 06/30/2008
  • Status: Active Grant
First Claim
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1. A coordinate calculation apparatus arranged to calculate a two-dimensional coordinate point, the coordinate calculation apparatus comprising:

  • a wireless controller module arranged to receive operation data wirelessly from an input device, the operation data including an angular rate data corresponding to an angular rate of the input device detected by a gyroscope of the input device;

    a processor; and

    a memory coupled to said processor, said memory storing instructions that, when executed by said processor, control said processor to;

    calculate a first orientation of the input device in accordance with the angular rate data; and

    calculate the two-dimensional coordinate point based on the first orientation of the input device,wherein the two-dimensional coordinate point represents coordinates of an intersection between a line segment continuing from a predetermined position of the input device within a predetermined virtual space in a direction of a vector representing the first orientation within the predetermined virtual space and a predetermined virtual plane within the predetermined virtual space, andwherein the two-dimensional coordinate point is calculated independently of the position of the input device relative to a display in a real world space, to enable the two-dimensional coordinate point to be calculated regardless of a direction in which the input device is pointing in the real-world space, the display being used to reflect the calculated two-dimensional coordinate point.

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