function that generates a mask entry from a tile
grid to generate mask from
center position around which to generate mask
rectangular array to populate with generated mask values. must match the size of the grid
1 auto myGrid = rectGrid([ 2 [ 00, 01, 02, 03, 04 ], 3 [ 10, 11, 12, 13, 14 ], 4 [ 20, 21, 22, 23, 24 ], 5 ]); 6 7 uint[3][3] mask; 8 9 myGrid.createMaskAround!(tile => tile > 10)(RowCol(1,1), mask); 10 11 assert(mask == [ 12 [0, 0, 0], 13 [0, 1, 1], 14 [1, 1, 1], 15 ]); 16 17 myGrid.createMaskAround!(tile => tile < 24)(RowCol(2,4), mask); 18 19 assert(mask == [ 20 [1, 1, 0], 21 [1, 0, 0], 22 [0, 0, 0], 23 ]);
Same as createMask, but specify the offset of the mask's center rather than the top-left corner.