Created
March 12, 2019 14:27
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Pathfinder... with diagonals?
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| -- returns any neighbor map | |
| -- position at which flag zero | |
| -- is unset | |
| function map_neighbors(node, graph) | |
| local neighbors = {} | |
| if (not fget(mget(node.x - 1, node.y - 1), 0)) add(neighbors, {x=node.x - 1, y=node.y - 1}) | |
| if (not fget(mget(node.x, node.y - 1), 0)) add(neighbors, {x=node.x, y=node.y - 1}) | |
| if (not fget(mget(node.x + 1, node.y - 1), 0)) add(neighbors, {x=node.x + 1, y=node.y - 1}) | |
| if (not fget(mget(node.x - 1, node.y), 0)) add(neighbors, {x=node.x - 1, y=node.y}) | |
| if (not fget(mget(node.x + 1, node.y), 0)) add(neighbors, {x=node.x + 1, y=node.y}) | |
| if (not fget(mget(node.x - 1, node.y + 1), 0)) add(neighbors, {x=node.x - 1, y=node.y + 1}) | |
| if (not fget(mget(node.x, node.y + 1), 0)) add(neighbors, {x=node.x, y=node.y + 1}) | |
| if (not fget(mget(node.x + 1, node.y + 1), 0)) add(neighbors, {x=node.x + 1, y=node.y + 1}) | |
| return neighbors | |
| end |
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