* selection to produce a few large rectangles more often
* than oodles of small ones? Unsure, but might be worth a
* try.
- *
- * - During redraw, do corner analysis centrally in game_redraw()
- * itself so that we can take it into account when computing the
- * `visible' array. If we can do this, we can actually _turn on_
- * the `visible' processing and keep redraws to the minimum
- * required.
*/
#include <stdio.h>
#define TILE_SIZE 24
#define BORDER 18
+#define CORNER_TOLERANCE 0.15F
+#define CENTRE_TOLERANCE 0.15F
+
#define FLASH_TIME 0.13F
#define COORD(x) ( (x) * TILE_SIZE + BORDER )
{
if (params->w <= 0 && params->h <= 0)
return "Width and height must both be greater than zero";
- if (params->w * params->h < 4)
- return "Total area must be at least 4";
+ if (params->w < 2 && params->h < 2)
+ return "Grid area must be greater than one";
return NULL;
}
int nrects = 0, rectsize = 0;
/*
- * Maximum rectangle area is 1/6 of total grid size.
+ * Maximum rectangle area is 1/6 of total grid size, unless
+ * this means we can't place any rectangles at all in which
+ * case we set it to 2 at minimum.
*/
maxarea = params->w * params->h / 6;
+ if (maxarea < 2)
+ maxarea = 2;
for (rw = 1; rw <= params->w; rw++)
for (rh = 1; rh <= params->h; rh++) {
continue;
for (x = 0; x <= params->w - rw; x++)
for (y = 0; y <= params->h - rh; y++) {
- /*
- * We have a candidate rectangle placement. See
- * if it's unobstructed.
- */
- int xx, yy;
- int ok;
-
- ok = TRUE;
- for (xx = x; xx < x+rw; xx++)
- for (yy = y; yy < y+rh; yy++)
- if (index(params, grid, xx, yy) >= 0) {
- ok = FALSE;
- goto break1; /* break both loops at once */
- }
- break1:
-
- if (!ok)
- continue;
-
if (nrects >= rectsize) {
rectsize = nrects + 256;
rects = sresize(rects, rectsize, struct rect);
} else if (n == '_') {
/* do nothing */;
} else if (n > '0' && n <= '9') {
- squares += atoi(seed-1);
+ squares++;
while (*seed >= '0' && *seed <= '9')
seed++;
} else
sfree(ui);
}
-int coord_round(float coord)
+void coord_round(float x, float y, int *xr, int *yr)
{
- int i;
- float dist;
+ float xs, ys, xv, yv, dx, dy, dist;
/*
- * Find the nearest integer.
+ * Find the nearest square-centre.
*/
- i = (int)(coord + 0.5F);
+ xs = (float)floor(x) + 0.5F;
+ ys = (float)floor(y) + 0.5F;
/*
- * Find the distance from us to that integer.
+ * And find the nearest grid vertex.
*/
- dist = (float)fabs(coord - (float)i);
+ xv = (float)floor(x + 0.5F);
+ yv = (float)floor(y + 0.5F);
/*
- * If we're within the tolerance limit, return the edge
- * coordinate. Otherwise, return the centre coordinate.
+ * We allocate clicks in parts of the grid square to either
+ * corners, edges or square centres, as follows:
+ *
+ * +--+--------+--+
+ * | | | |
+ * +--+ +--+
+ * | `. ,' |
+ * | +--+ |
+ * | | | |
+ * | +--+ |
+ * | ,' `. |
+ * +--+ +--+
+ * | | | |
+ * +--+--------+--+
+ *
+ * (Not to scale!)
+ *
+ * In other words: we measure the square distance (i.e.
+ * max(dx,dy)) from the click to the nearest corner, and if
+ * it's within CORNER_TOLERANCE then we return a corner click.
+ * We measure the square distance from the click to the nearest
+ * centre, and if that's within CENTRE_TOLERANCE we return a
+ * centre click. Failing that, we find which of the two edge
+ * centres is nearer to the click and return that edge.
*/
- if (dist < 0.3F)
- return i * 2;
- else
- return 1 + 2 * (int)coord;
+
+ /*
+ * Check for corner click.
+ */
+ dx = (float)fabs(x - xv);
+ dy = (float)fabs(y - yv);
+ dist = (dx > dy ? dx : dy);
+ if (dist < CORNER_TOLERANCE) {
+ *xr = 2 * (int)xv;
+ *yr = 2 * (int)yv;
+ } else {
+ /*
+ * Check for centre click.
+ */
+ dx = (float)fabs(x - xs);
+ dy = (float)fabs(y - ys);
+ dist = (dx > dy ? dx : dy);
+ if (dist < CENTRE_TOLERANCE) {
+ *xr = 1 + 2 * (int)xs;
+ *yr = 1 + 2 * (int)ys;
+ } else {
+ /*
+ * Failing both of those, see which edge we're closer to.
+ * Conveniently, this is simply done by testing the relative
+ * magnitude of dx and dy (which are currently distances from
+ * the square centre).
+ */
+ if (dx > dy) {
+ /* Vertical edge: x-coord of corner,
+ * y-coord of square centre. */
+ *xr = 2 * (int)xv;
+ *yr = 1 + 2 * (int)ys;
+ } else {
+ /* Horizontal edge: x-coord of square centre,
+ * y-coord of corner. */
+ *xr = 1 + 2 * (int)xs;
+ *yr = 2 * (int)yv;
+ }
+ }
+ }
}
static void ui_draw_rect(game_state *state, game_ui *ui,
return NULL;
}
- xc = coord_round(FROMCOORD((float)x));
- yc = coord_round(FROMCOORD((float)y));
+ coord_round(FROMCOORD((float)x), FROMCOORD((float)y), &xc, &yc);
if (startdrag) {
ui->drag_start_x = xc;
* We've made a real change to the grid. Check to see
* if the game has been completed.
*/
- if (!ret->completed) {
+ if (ret && !ret->completed) {
int x, y, ok;
unsigned char *correct = get_correct(ret);
* Drawing routines.
*/
-#define CORRECT 256
+#define CORRECT 65536
#define COLOUR(k) ( (k)==1 ? COL_LINE : COL_DRAG )
#define MAX(x,y) ( (x)>(y) ? (x) : (y) )
struct game_drawstate {
int started;
int w, h;
- unsigned short *visible;
+ unsigned int *visible;
};
void game_size(game_params *params, int *x, int *y)
ds->started = FALSE;
ds->w = state->w;
ds->h = state->h;
- ds->visible = snewn(ds->w * ds->h, unsigned short);
+ ds->visible = snewn(ds->w * ds->h, unsigned int);
for (i = 0; i < ds->w * ds->h; i++)
ds->visible[i] = 0xFFFF;
}
void draw_tile(frontend *fe, game_state *state, int x, int y,
- unsigned char *hedge, unsigned char *vedge, int correct)
+ unsigned char *hedge, unsigned char *vedge,
+ unsigned char *corners, int correct)
{
int cx = COORD(x), cy = COORD(y);
char str[80];
/*
* Draw corners.
*/
- if ((HRANGE(state,x-1,y) && index(state,hedge,x-1,y)) ||
- (VRANGE(state,x,y-1) && index(state,vedge,x,y-1)))
+ if (index(state,corners,x,y))
draw_rect(fe, cx, cy, 2, 2,
- COLOUR(MAX4(index(state,hedge,x-1,y),
- index(state,vedge,x,y-1),
- index(state,hedge,x,y),
- index(state,vedge,x,y))));
- if ((HRANGE(state,x+1,y) && index(state,hedge,x+1,y)) ||
- (VRANGE(state,x+1,y-1) && index(state,vedge,x+1,y-1)))
+ COLOUR(index(state,corners,x,y)));
+ if (x+1 < state->w && index(state,corners,x+1,y))
draw_rect(fe, cx+TILE_SIZE-1, cy, 2, 2,
- COLOUR(MAX4(index(state,hedge,x+1,y),
- index(state,vedge,x+1,y-1),
- index(state,hedge,x,y),
- index(state,vedge,x+1,y))));
- if ((HRANGE(state,x-1,y+1) && index(state,hedge,x-1,y+1)) ||
- (VRANGE(state,x,y+1) && index(state,vedge,x,y+1)))
+ COLOUR(index(state,corners,x+1,y)));
+ if (y+1 < state->h && index(state,corners,x,y+1))
draw_rect(fe, cx, cy+TILE_SIZE-1, 2, 2,
- COLOUR(MAX4(index(state,hedge,x-1,y+1),
- index(state,vedge,x,y+1),
- index(state,hedge,x,y+1),
- index(state,vedge,x,y))));
- if ((HRANGE(state,x+1,y+1) && index(state,hedge,x+1,y+1)) ||
- (VRANGE(state,x+1,y+1) && index(state,vedge,x+1,y+1)))
+ COLOUR(index(state,corners,x,y+1)));
+ if (x+1 < state->w && y+1 < state->h && index(state,corners,x+1,y+1))
draw_rect(fe, cx+TILE_SIZE-1, cy+TILE_SIZE-1, 2, 2,
- COLOUR(MAX4(index(state,hedge,x+1,y+1),
- index(state,vedge,x+1,y+1),
- index(state,hedge,x,y+1),
- index(state,vedge,x+1,y))));
+ COLOUR(index(state,corners,x+1,y+1)));
draw_update(fe, cx, cy, TILE_SIZE+1, TILE_SIZE+1);
}
{
int x, y;
unsigned char *correct;
- unsigned char *hedge, *vedge;
+ unsigned char *hedge, *vedge, *corners;
correct = get_correct(state);
vedge = state->vedge;
}
+ corners = snewn(state->w * state->h, unsigned char);
+ memset(corners, 0, state->w * state->h);
+ for (x = 0; x < state->w; x++)
+ for (y = 0; y < state->h; y++) {
+ if (x > 0) {
+ int e = index(state, vedge, x, y);
+ if (index(state,corners,x,y) < e)
+ index(state,corners,x,y) = e;
+ if (y+1 < state->h &&
+ index(state,corners,x,y+1) < e)
+ index(state,corners,x,y+1) = e;
+ }
+ if (y > 0) {
+ int e = index(state, hedge, x, y);
+ if (index(state,corners,x,y) < e)
+ index(state,corners,x,y) = e;
+ if (x+1 < state->w &&
+ index(state,corners,x+1,y) < e)
+ index(state,corners,x+1,y) = e;
+ }
+ }
+
if (!ds->started) {
draw_rect(fe, 0, 0,
state->w * TILE_SIZE + 2*BORDER + 1,
for (x = 0; x < state->w; x++)
for (y = 0; y < state->h; y++) {
- unsigned short c = 0;
+ unsigned int c = 0;
if (HRANGE(state,x,y))
c |= index(state,hedge,x,y);
- if (HRANGE(state,x+1,y))
- c |= index(state,hedge,x+1,y) << 2;
+ if (HRANGE(state,x,y+1))
+ c |= index(state,hedge,x,y+1) << 2;
if (VRANGE(state,x,y))
c |= index(state,vedge,x,y) << 4;
- if (VRANGE(state,x,y+1))
- c |= index(state,vedge,x,y+1) << 6;
+ if (VRANGE(state,x+1,y))
+ c |= index(state,vedge,x+1,y) << 6;
+ c |= index(state,corners,x,y) << 8;
+ if (x+1 < state->w)
+ c |= index(state,corners,x+1,y) << 10;
+ if (y+1 < state->h)
+ c |= index(state,corners,x,y+1) << 12;
+ if (x+1 < state->w && y+1 < state->h)
+ c |= index(state,corners,x+1,y+1) << 14;
if (index(state, correct, x, y) && !flashtime)
c |= CORRECT;
if (index(ds,ds->visible,x,y) != c) {
- draw_tile(fe, state, x, y, hedge, vedge, c & CORRECT);
- /* index(ds,ds->visible,x,y) = c; */
+ draw_tile(fe, state, x, y, hedge, vedge, corners, c & CORRECT);
+ index(ds,ds->visible,x,y) = c;
}
}
~mdw / sgt / puzzles / blobdiff