| 摘要 |
<p>The invention relates to a method for estimation of the occlusion at a point P (16) of a virtual environment, the point P (16) belonging to a surface (S) grouping at least some of the points of the virtual environment visible from a viewpoint (11). In order to improve the display while minimising the required calculation time, the method comprises steps for:
- estimating intersections (403) between said surface (S) and a plurality of half-lines having as origin said point P (16), said intersections (403) being estimated by discretization of each half-line (40) of said plurality of half-lines,
- associating of occlusion factors with the half-lines of said plurality of half-lines having an intersection with said surface (S), said occlusion factors being a function of occlusion distances ” 0 separating said point P (16) from said intersections (403), and
- estimation of the occlusion in said point P (16) from said estimated intersections (403).</p> |
