A HEURISTIC METHOD FOR ADAPTIVE SUBDIVISION OF COONS PATCHESFOR RENDERING

摘要

The invention discloses a method for preparing Coons patches for rendering . The Coons patch is examined for folds and any regions containing folds are isolated from regions that do not contain folds. The rendering method appropriate for fold containing and non-fold containing regions can then be selected. The renderi ng method appropriate for fold containing regions requires extensive computatio n compared to that for non-fold containing regions. By isolating the regions containing folds, the invention allows the avoidance of the extensive computation for t he non-fold containing regions. Thus, the invention enables reduction of the amount of computation that is required during rendering.