Method and device for graphic representation of an object defined by a plurality of triangles on a display surface

Abstract

A device for the graphic representation on a display surface of an object defined by a plurality of triangles which are respectively specified by three points in homogeneous object coordinates comprises a device for transforming the homogeneous object coordinates of the plurality of triangles into homogeneous clip coordinates of a clip coordinate system with an observer standpoint located on an observation axis which is perpendicular to the display surface, a device for determining the position of the observer standpoint in relation to each of the plurality of triangles by determining the orientation of each triangle of the plurality of triangles in the clip coordinate system with repect to the observer standpoint using the homogeneous clip coordinates of the plurality of triangles, a device for marking the position of the observer standpoint in relation to each triangle of the plurality of triangles in association with the homogeneous object coordinates of the plurality of triangles, and a device for processing the triangles specified in the object coordinates using the marked position of the observer standpoint in relation to each triangle so as to graphically represent the object on the display surface.