Patent ID: 7030880

Claim:
An information processing apparatus for, in conducting Rasterize processing of imaging of a three-dimensional image, calculating a quantity of a change of x coordinates Δ ⁢ ⁢ x = x 2 - x 1 y 2 - y 1 to y coordinates of a straight line passing through a point P 1 (x 1 ,y 1 ) and a point P 2 (x 2 ,y 2 ) on a two-dimensional plain, characterized in that the apparatus comprises: a memory in which a constant μ representative of μ = λ y 2 - y 1 is stored in association with the quantity of the change of the y coordinates; and calculation means for, in calculating Δx, reading μ corresponding to the quantity of the change of said y coordinates from said memory, and calculating Δx′=μ* ( x 2 −x 1 ); by means of multiplication, and calculating this result as Δx.