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Hats tiling: more uniform parent selection.

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This tweak improves the uniformity of the generated patches of hat
tiling, by selecting from (the closest 32-bit approximation I can get
to) the limiting probability distribution of finite patches in the
whole plane.

This shouldn't invalidate any grid description that contains enough
coordinates to uniquely specify a piece of tiling - in particular, any
generated by the game itself. But if anyone's been brave enough to
hand-type a grid description in the last two days and left off some of
the coordinates, then those might be invalidated.
This commit is contained in:
Simon Tatham
2023-03-28 20:27:27 +01:00
parent 2b1167d82a
commit 6f75879e9f
3 changed files with 176 additions and 96 deletions
Download Patch File Download Diff File Expand all files Collapse all files

63
hat-tables.h
View File

@ -31,69 +31,6 @@ static const size_t nchildren[] = {
11,
};
static const MetatilePossibleParent permitted_parents_H[] = {
{ TT_H, 0 },
{ TT_H, 1 },
{ TT_H, 2 },
{ TT_T, 0 },
{ TT_P, 0 },
{ TT_P, 1 },
{ TT_F, 0 },
{ TT_F, 1 },
};
static const MetatilePossibleParent permitted_parents_T[] = {
{ TT_H, 3 },
};
static const MetatilePossibleParent permitted_parents_P[] = {
{ TT_H, 4 },
{ TT_H, 5 },
{ TT_H, 6 },
{ TT_T, 1 },
{ TT_T, 2 },
{ TT_T, 3 },
{ TT_P, 2 },
{ TT_P, 3 },
{ TT_P, 4 },
{ TT_F, 2 },
{ TT_F, 3 },
};
static const MetatilePossibleParent permitted_parents_F[] = {
{ TT_H, 7 },
{ TT_H, 8 },
{ TT_H, 9 },
{ TT_H, 10 },
{ TT_H, 11 },
{ TT_H, 12 },
{ TT_T, 4 },
{ TT_T, 5 },
{ TT_T, 6 },
{ TT_P, 5 },
{ TT_P, 6 },
{ TT_P, 7 },
{ TT_P, 8 },
{ TT_P, 9 },
{ TT_P, 10 },
{ TT_F, 4 },
{ TT_F, 5 },
{ TT_F, 6 },
{ TT_F, 7 },
{ TT_F, 8 },
{ TT_F, 9 },
{ TT_F, 10 },
};
static const MetatilePossibleParent *const permitted_parents[] = {
permitted_parents_H,
permitted_parents_T,
permitted_parents_P,
permitted_parents_F,
};
static const size_t n_permitted_parents[] = {
8,
1,
11,
22,
};
static const KitemapEntry kitemap_H[] = {
/* hat #0 in metatile #0 (type H) */
{1,0,0}, {7,3,0}, {3,0,4}, {4,0,4},