Patent ID: 7538780
Filing Date: 2009-05-26
Classification: G06T

Abstract:
1. A drawing processing apparatus, comprising: a physical communication interface configured to receive a scrolling instruction; and a drawing processor that includes a drawing unit configured to produce a three-dimensional image of a drawing object range on a map, the unit configured to calculate a reference position and a distance in a perpendicular direction to a viewing direction from the reference position, the drawing unit configured to move the reference position with regard to the viewing direction, the drawing unit configured to produce the image using a ratio for an upper, middle, and lower portion of a display unit, the ratio being a number of display cells at a corresponding portion to a reference number of display cells, and a drawing object range moving unit configured to move the drawing object range in the scrolling instruction direction in response to the instruction from the physical communication interface to scroll in a perpendicular direction and to calculate individual movement amounts of an upper, middle, and lower portions of the drawing object range upon the movement of the drawing object range based on values of the ratio for each of the upper and lower portions, with reference to the distance in the perpendicular direction at the reference position.