METHOD FOR PREPARING AND DISPLAYING CG IMAGE FOR BUILDING AND EXTERIOR

摘要

PROBLEM TO BE SOLVED: To enable a walk through equal to the case observed while being actually walked around the inside or outside of a building by displaying the building and its exterior as a still image or a moving image by the means of a CG image. SOLUTION: Three-dimensional shape data with respect to a building Z1 and three-dimensional data with respect to exteriors 54 and 55 belonging to the building Z1 are respectively prepared by a CAD system in advance. After the respective three-dimensional data with respect to the building Z1 and exteriors 54 and 55 are composed, data for CG image corresponding to the CG image expressing the state of watching the building Z1 and/or the exteriors 54 and 55 are generated by stopping or moving the viewpoint position being the reference of CG image preparation in the desired direction at/from a three- dimensional image model composed based on the input operation of an operator, and displayed as the still image or moving image.