Image processing device and method, and program therefor

Abstract

Provided are image processing devices and methods by which, a polygon analogous to its actual image can be produced through a shading process without placing a heavy load on devices even when there is a light source inside of the polygon, and programs therefor. A color data input section reads coordinate values of each vertex of the polygon from a memory, for example, and rounds those if needed. The values are then regarded as color data of each vertex of the polygon. A gradation section carries out the shading process based on the coordinate values thus set as the color data so that the coordinate values of each pixel in the polygon are derived. A distance calculation section receives coordinate values of a specific point which will be the basis for the shading process, and rounds those if needed. In accordance with the resultant coordinate values, calculated is a distance-between-two-point D between the specific point and each pixel of the polygon. With reference to the color data of the specific point, a color data determination section determines the color data for each pixel of the polygon inclusive of the vertexes in accordance with the distance-between-two-point.