Three-dimensional image creating apparatus

Abstract

A three-dimensional image having a complicated shape is created from a two-dimensional image obtainable by simple drawing. When a drawing operation is carried out using a digitizer, density data to be stored in one of a density layer 0-data memory to a density layer n-data memory is created using a brush shape generated in a brush generating section. A distance up to a reference coordinate point with respect to a primitive shape is initially set in a distance data memory. A distance operating section computes a modification rate for modifying each point on the primitive shape, on the basis of two-dimensional density data selected by a selecting section. The selecting section sequentially reads out multilayered density data, to cause a normal computing section to compute a normal direction on each point on the primitive shape or on the modified primitive shape from data in the vicinity of the point. A rendering section carries out modification with respect to each point on the primitive shape or on the modified primitive shape in the normal direction thereof, and then, a display device displays the modified shape as an image.