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round-robin edges

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Justin Lin
2021-07-29 15:24:19 +08:00
parent a11eae4aaa
commit 3f499ca32d
1 changed files with 20 additions and 13 deletions
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33
src/experimental/tile_w2e.scad
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@@ -2,42 +2,49 @@
function tile_w2e(rows, columns, mask, seed) =
let(
y_range = [0:rows - 1],
x_range = [0:columns - 1],
/*
1 |
|___
(x,y) 0
*/
edges = is_undef(seed) ? [
for(y = [0:rows])
for(y = y_range)
[
for(x = [0:columns])
for(x = x_range)
let(rs = rands(0, 1, 2))
[round(rs[0]), round(rs[1])]
]
] : [
for(y = [0:rows])
for(y = y_range)
[
for(x = [0:columns])
for(x = x_range)
let(rs = rands(0, 1, 2, seed + y * columns + x))
[round(rs[0]), round(rs[1])]
]
],
m = is_undef(mask) ? [
for(y = [0:rows - 1])
[for(x = [0:columns - 1]) 1]
for(y = y_range)
[for(x = x_range) 1]
] : [
for(y = rows - 1; y > -1; y = y - 1)
[for(x = [0:columns - 1]) mask[y][x]]
[for(x = x_range) mask[y][x]]
],
/*
1
. － .
. － .
8 | | 2
. － .
. － .
4
*/
tiles = [
for(y = [0:rows - 1])
for(x = [0:columns - 1])
for(y = y_range)
for(x = x_range)
if(m[y][x] == 1)
[x, y,
(edges[y + 1][x][0] == 1 ? 1 : 0) +
(edges[y][x + 1][1] == 1 ? 2 : 0) +
(edges[(y + 1) % rows][x][0] == 1 ? 1 : 0) +
(edges[y][(x + 1) % columns][1] == 1 ? 2 : 0) +
(edges[y][x][0] == 1 ? 4 : 0) +
(edges[y][x][1] == 1 ? 8 : 0)
]