Cycle diff mode (unified / full-context / raw)
Instead of perturbing each pixel in the input image at random, we can choose to dither by a predetermined amount depending on the pixel’s position in the image. This can be achieved using a threshold map; a small, fixed-size matrix where each entry tells us the amount by which to perturb the input value , producing the dithered value . This matrix is tiled across the input image and sampled for every pixel during the dithering process. The following describes a dithering function for a 4×4 matrix given the pixel raster coordinates :
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Now, for each shortcut in this sequence, OsmAnd runs its highly optimized A* algorithm on the detailed map, but strictly limited to the small area of the cluster that shortcut belongs to.
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union object_info *h = free_list[classno];，详情可参考搜狗输入法2026