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tracks: Allow a smaller or non-existent border at small tile sizes

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The basic tile size in Tracks is required to be a multiple of 6, which
means that for small tile sizes the steps are rather large.  With the
standard border widths, this means that the default 8-by-8 puzzle can be
246 pixels wide (tilesize == 24) or 184 pixels wide (tilesize == 18).
This is particularly annoying if you happen to have a 240-pixel-wide
screen.

This commit allows the puzzle to reduce or remove the borders at small
tile sizes, on the grounds that a slightly narrower border is acceptable
if it avoids needing to use a smaller tile size.  It encodes the border
width in (tilesize % 6), and is thus enabled when the default border
width is 5 or less.  Above that size (which is a tilesize of 48), I
assume the steps in tile size aren't big enough to be a serious problem.
This commit is contained in:
Ben Harris
2022-12-08 13:24:36 +00:00
parent 0d36b471d8
commit 1d91522bab
1 changed files with 17 additions and 5 deletions
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22
tracks.c
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@ -1999,13 +1999,14 @@ static void game_changed_state(game_ui *ui, const game_state *oldstate,
{
}
#define PREFERRED_TILE_SIZE 30
#define PREFERRED_TILE_SIZE 33
#define HALFSZ (ds->sz6*3)
#define THIRDSZ (ds->sz6*2)
#define TILE_SIZE (ds->sz6*6)
#define BORDER (TILE_SIZE/8)
#define MAX_BORDER (TILE_SIZE/8)
#define LINE_THICK (TILE_SIZE/16)
#define BORDER (ds->border)
#define GRID_LINE_TL (ds->grid_line_tl)
#define GRID_LINE_BR (ds->grid_line_br)
#define GRID_LINE_ALL (ds->grid_line_all)
@ -2028,7 +2029,7 @@ static void game_changed_state(game_ui *ui, const game_state *oldstate,
#define DS_CSHIFT 20 /* R/U/L/D shift, for cursor-on-edge */
struct game_drawstate {
int sz6, grid_line_all, grid_line_tl, grid_line_br;
int sz6, border, grid_line_all, grid_line_tl, grid_line_br;
bool started;
int w, h, sz;
@ -2403,11 +2404,19 @@ static game_state *execute_move(const game_state *state, const char *move)
static void game_compute_size(const game_params *params, int tilesize,
int *x, int *y)
{
/* Ick: fake up `ds->tilesize' for macro expansion purposes */
/* Ick: fake up `ds->sz6' and `ds->border` for macro expansion purposes */
struct {
int sz6;
int sz6, border;
} ads, *ds = &ads;
ads.sz6 = tilesize/6;
ads.border = MAX_BORDER;
/*
* Allow a reduced border at small tile sizes because the steps
* are quite large and it's better to have a thin border than
* to go down to a smaller tile size.
*/
if (ads.border <= 5)
ads.border = min(tilesize % 6, MAX_BORDER);
*x = (params->w+2) * TILE_SIZE + 2 * BORDER;
*y = (params->h+2) * TILE_SIZE + 2 * BORDER;
}
@ -2416,6 +2425,9 @@ static void game_set_size(drawing *dr, game_drawstate *ds,
const game_params *params, int tilesize)
{
ds->sz6 = tilesize/6;
ds->border = MAX_BORDER;
if (ds->border <= 5)
ds->border = min(tilesize % 6, MAX_BORDER);
ds->grid_line_all = max(LINE_THICK, 1);
ds->grid_line_br = ds->grid_line_all / 2;
ds->grid_line_tl = ds->grid_line_all - ds->grid_line_br;