Patent ID: 6646642
Filing Date: 2003-11-11
Classification: G06T

Abstract:
A method of creating image frames forming a dynamic image obtained by projecting a virtual three-dimensional object which is moving with predetermined motion characteristics in a virtual three-dimensional world coordinate space, said method comprising:a three-dimensional world coordinate calculating step which calculates a three-dimensional position of the three-dimensional object in the three-dimensional world coordinate space according to the motion characteristics; a two-dimensional coordinate calculating step which calculates a two-dimensional position on a virtual camera screen corresponding to the calculated three-dimensional position; a history accumulating step which accumulates a history of the two-dimensional position calculated by said two-dimensional coordinate calculating step; an object drawing step which draws an image representing the three-dimensional object at the two-dimensional position calculated by said two-dimensional coordinate calculating step; and a locus drawing step which draws a line segment or a shape so as to connect a plurality of positions including the two-dimensional position calculated by said two-dimensional coordinate calculating step and at least one position accumulated by said history accumulating step when at least one image frame was generated, in order of those positions starting from the position calculated earlier.