Patent ID: 7023434

Claim:
An image processing apparatus, comprising: a land object rendering means for rendering a land object in a 3-dimension virtual space; and a grid rendering means for rendering a grid on a surface of said land object, said grid rendering means displaying said grid by combining a plurality of grid lines with each other in vertical and horizontal directions, said grid including a plurality of sections sectioned by intersecting points of said grid lines in the vertical direction and in the horizontal direction, and each of said plurality of grid lines being constructed by a series of grid line elements which are elements for forming said grid line in a plural number, wherein said grid rendering means includes the number of elements determining means for making the number of the grid line elements included in each of said sections different depending upon a gradient of the surface of said land object at a position corresponding to each of said sections so that the grid lines of the vertical direction and the grid lines of the horizontal direction can be displayed, and a flow rendering means for performing rendering as if said grid lines each formed by said grid line elements having the number determined by said number of elements determining means flow toward an inclined direction at a constant speed on the surface of said land object.