1. A graphic computing apparatus comprising: a shape divider which divide a unit shape of a surface of an object present in a three-dimensional space into a plurality of subpolygons arranged two-dimensionally and having an arbitrary size, to generate a subpolygon mesh; a vertex processor which computes parameters required for drawing in units of pixels with respect to subpolygons for each vertex of the subpolygon mesh generated by said shape divider; a rendering processor which computes drawing data in units of pixels on the basis of the parameters computed by said vertex processor and picture data for texture mapping; and a frame memory which stores the drawing data as picture data together with at least data for texture mapping required for said rendering processor to compute the drawing data.