CREATING THE DISPLACEMENT MAPPED LOW-LEVEL MESH AND ITS APPLICATION FOR CG SOFTWARE

Abstract

In this paper, we propose a new method for creating the displacement map to restore the detailed geometry from the low-level base mesh. The displacement mapping actually changes the surface geometry with the displacement information. Recent CG software can treat the displacement mapping for increasing the accuracy of the surface. We convert the displacement map to the color image that is mapped to the low-level mesh in order to utilize the displacement map by existing CG software. Because displacement information is in image format, we can compress the displacement information by any image compression technique. The load for creating the three-dimensional scene is reduced by using such a low-level mesh which has the displacement information. We obtain the displacement information by finding the point on the input mesh corresponding to the point on the base mesh. The corresponding point is calculated by using the barycentric coordinate of the parameterized mesh. Because the mesh parameterization creates one-to-one mapping between the input mesh and the base mesh, we can avoid the problems that are caused by the traditional ray-triangle intersection method. For demonstration, we restore the detailed surface from our result by using the Blender 2.44.