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puzzles/blackbox.c
Simon Tatham a7dc17c425 Rework the preset menu system to permit submenus. 
To do this, I've completely replaced the API between mid-end and front
end, so any downstream front end maintainers will have to do some
rewriting of their own (sorry). I've done the necessary work in all
five of the front ends I keep in-tree here - Windows, GTK, OS X,
Javascript/Emscripten, and Java/NestedVM - and I've done it in various
different styles (as each front end found most convenient), so that
should provide a variety of sample code to show downstreams how, if
they should need it.

I've left in the old puzzle back-end API function to return a flat
list of presets, so for the moment, all the puzzle backends are
unchanged apart from an extra null pointer appearing in their
top-level game structure. In a future commit I'll actually use the new
feature in a puzzle; perhaps in the further future it might make sense
to migrate all the puzzles to the new API and stop providing back ends
with two alternative ways of doing things, but this seemed like enough
upheaval for one day.
2017-04-26 21:51:23 +01:00

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/*
* blackbox.c: implementation of 'Black Box'.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include <ctype.h>
#include <math.h>
#include "puzzles.h"
#define PREFERRED_TILE_SIZE 32
#define FLASH_FRAME 0.2F
/* Terminology, for ease of reading various macros scattered about the place.
*
* The 'arena' is the inner area where the balls are placed. This is
* indexed from (0,0) to (w-1,h-1) but its offset in the grid is (1,1).
*
* The 'range' (firing range) is the bit around the edge where
* the lasers are fired from. This is indexed from 0 --> (2*(w+h) - 1),
* starting at the top left ((1,0) on the grid) and moving clockwise.
*
* The 'grid' is just the big array containing arena and range;
* locations (0,0), (0,w+1), (h+1,w+1) and (h+1,0) are unused.
*/
enum {
COL_BACKGROUND, COL_COVER, COL_LOCK,
COL_TEXT, COL_FLASHTEXT,
COL_HIGHLIGHT, COL_LOWLIGHT, COL_GRID,
COL_BALL, COL_WRONG, COL_BUTTON,
COL_CURSOR,
NCOLOURS
};
struct game_params {
int w, h;
int minballs, maxballs;
};
static game_params *default_params(void)
{
game_params *ret = snew(game_params);
ret->w = ret->h = 8;
ret->minballs = ret->maxballs = 5;
return ret;
}
static const game_params blackbox_presets[] = {
{ 5, 5, 3, 3 },
{ 8, 8, 5, 5 },
{ 8, 8, 3, 6 },
{ 10, 10, 5, 5 },
{ 10, 10, 4, 10 }
};
static int game_fetch_preset(int i, char **name, game_params **params)
{
char str[80];
game_params *ret;
if (i < 0 || i >= lenof(blackbox_presets))
return FALSE;
ret = snew(game_params);
*ret = blackbox_presets[i];
if (ret->minballs == ret->maxballs)
sprintf(str, "%dx%d, %d balls",
ret->w, ret->h, ret->minballs);
else
sprintf(str, "%dx%d, %d-%d balls",
ret->w, ret->h, ret->minballs, ret->maxballs);
*name = dupstr(str);
*params = ret;
return TRUE;
}
static void free_params(game_params *params)
{
sfree(params);
}
static game_params *dup_params(const game_params *params)
{
game_params *ret = snew(game_params);
*ret = *params; /* structure copy */
return ret;
}
static void decode_params(game_params *params, char const *string)
{
char const *p = string;
game_params *defs = default_params();
*params = *defs; free_params(defs);
while (*p) {
switch (*p++) {
case 'w':
params->w = atoi(p);
while (*p && isdigit((unsigned char)*p)) p++;
break;
case 'h':
params->h = atoi(p);
while (*p && isdigit((unsigned char)*p)) p++;
break;
case 'm':
params->minballs = atoi(p);
while (*p && isdigit((unsigned char)*p)) p++;
break;
case 'M':
params->maxballs = atoi(p);
while (*p && isdigit((unsigned char)*p)) p++;
break;
default:
;
}
}
}
static char *encode_params(const game_params *params, int full)
{
char str[256];
sprintf(str, "w%dh%dm%dM%d",
params->w, params->h, params->minballs, params->maxballs);
return dupstr(str);
}
static config_item *game_configure(const game_params *params)
{
config_item *ret;
char buf[80];
ret = snewn(4, config_item);
ret[0].name = "Width";
ret[0].type = C_STRING;
sprintf(buf, "%d", params->w);
ret[0].sval = dupstr(buf);
ret[0].ival = 0;
ret[1].name = "Height";
ret[1].type = C_STRING;
sprintf(buf, "%d", params->h);
ret[1].sval = dupstr(buf);
ret[1].ival = 0;
ret[2].name = "No. of balls";
ret[2].type = C_STRING;
if (params->minballs == params->maxballs)
sprintf(buf, "%d", params->minballs);
else
sprintf(buf, "%d-%d", params->minballs, params->maxballs);
ret[2].sval = dupstr(buf);
ret[2].ival = 0;
ret[3].name = NULL;
ret[3].type = C_END;
ret[3].sval = NULL;
ret[3].ival = 0;
return ret;
}
static game_params *custom_params(const config_item *cfg)
{
game_params *ret = snew(game_params);
ret->w = atoi(cfg[0].sval);
ret->h = atoi(cfg[1].sval);
/* Allow 'a-b' for a range, otherwise assume a single number. */
if (sscanf(cfg[2].sval, "%d-%d", &ret->minballs, &ret->maxballs) < 2)
ret->minballs = ret->maxballs = atoi(cfg[2].sval);
return ret;
}
static char *validate_params(const game_params *params, int full)
{
if (params->w < 2 || params->h < 2)
return "Width and height must both be at least two";
/* next one is just for ease of coding stuff into 'char'
* types, and could be worked around if required. */
if (params->w > 255 || params->h > 255)
return "Widths and heights greater than 255 are not supported";
if (params->minballs > params->maxballs)
return "Minimum number of balls may not be greater than maximum";
if (params->minballs >= params->w * params->h)
return "Too many balls to fit in grid";
return NULL;
}
/*
* We store: width | height | ball1x | ball1y | [ ball2x | ball2y | [...] ]
* all stored as unsigned chars; validate_params has already
* checked this won't overflow an 8-bit char.
* Then we obfuscate it.
*/
static char *new_game_desc(const game_params *params, random_state *rs,
char **aux, int interactive)
{
int nballs = params->minballs, i;
char *grid, *ret;
unsigned char *bmp;
if (params->maxballs > params->minballs)
nballs += random_upto(rs, params->maxballs - params->minballs + 1);
grid = snewn(params->w*params->h, char);
memset(grid, 0, params->w * params->h * sizeof(char));
bmp = snewn(nballs*2 + 2, unsigned char);
memset(bmp, 0, (nballs*2 + 2) * sizeof(unsigned char));
bmp[0] = params->w;
bmp[1] = params->h;
for (i = 0; i < nballs; i++) {
int x, y;
do {
x = random_upto(rs, params->w);
y = random_upto(rs, params->h);
} while (grid[y*params->w + x]);
grid[y*params->w + x] = 1;
bmp[(i+1)*2 + 0] = x;
bmp[(i+1)*2 + 1] = y;
}
sfree(grid);
obfuscate_bitmap(bmp, (nballs*2 + 2) * 8, FALSE);
ret = bin2hex(bmp, nballs*2 + 2);
sfree(bmp);
return ret;
}
static char *validate_desc(const game_params *params, const char *desc)
{
int nballs, dlen = strlen(desc), i;
unsigned char *bmp;
char *ret;
/* the bitmap is 2+(nballs*2) long; the hex version is double that. */
nballs = ((dlen/2)-2)/2;
if (dlen < 4 || dlen % 4 ||
nballs < params->minballs || nballs > params->maxballs)
return "Game description is wrong length";
bmp = hex2bin(desc, nballs*2 + 2);
obfuscate_bitmap(bmp, (nballs*2 + 2) * 8, TRUE);
ret = "Game description is corrupted";
/* check general grid size */
if (bmp[0] != params->w || bmp[1] != params->h)
goto done;
/* check each ball will fit on that grid */
for (i = 0; i < nballs; i++) {
int x = bmp[(i+1)*2 + 0], y = bmp[(i+1)*2 + 1];
if (x < 0 || y < 0 || x >= params->w || y >= params->h)
goto done;
}
ret = NULL;
done:
sfree(bmp);
return ret;
}
#define BALL_CORRECT 0x01
#define BALL_GUESS 0x02
#define BALL_LOCK 0x04
#define LASER_FLAGMASK 0x1f800
#define LASER_OMITTED 0x0800
#define LASER_REFLECT 0x1000
#define LASER_HIT 0x2000
#define LASER_WRONG 0x4000
#define LASER_FLASHED 0x8000
#define LASER_EMPTY (~0)
#define FLAG_CURSOR 0x10000 /* needs to be disjoint from both sets */
struct game_state {
int w, h, minballs, maxballs, nballs, nlasers;
unsigned int *grid; /* (w+2)x(h+2), to allow for laser firing range */
unsigned int *exits; /* one per laser */
int done; /* user has finished placing his own balls. */
int laserno; /* number of next laser to be fired. */
int nguesses, reveal, justwrong, nright, nwrong, nmissed;
};
#define GRID(s,x,y) ((s)->grid[(y)*((s)->w+2) + (x)])
#define RANGECHECK(s,x) ((x) >= 0 && (x) <= (s)->nlasers)
/* specify numbers because they must match array indexes. */
enum { DIR_UP = 0, DIR_RIGHT = 1, DIR_DOWN = 2, DIR_LEFT = 3 };
struct offset { int x, y; };
static const struct offset offsets[] = {
{ 0, -1 }, /* up */
{ 1, 0 }, /* right */
{ 0, 1 }, /* down */
{ -1, 0 } /* left */
};
#ifdef DEBUGGING
static const char *dirstrs[] = {
"UP", "RIGHT", "DOWN", "LEFT"
};
#endif
static int range2grid(const game_state *state, int rangeno, int *x, int *y,
int *direction)
{
if (rangeno < 0)
return 0;
if (rangeno < state->w) {
/* top row; from (1,0) to (w,0) */
*x = rangeno + 1;
*y = 0;
*direction = DIR_DOWN;
return 1;
}
rangeno -= state->w;
if (rangeno < state->h) {
/* RHS; from (w+1, 1) to (w+1, h) */
*x = state->w+1;
*y = rangeno + 1;
*direction = DIR_LEFT;
return 1;
}
rangeno -= state->h;
if (rangeno < state->w) {
/* bottom row; from (1, h+1) to (w, h+1); counts backwards */
*x = (state->w - rangeno);
*y = state->h+1;
*direction = DIR_UP;
return 1;
}
rangeno -= state->w;
if (rangeno < state->h) {
/* LHS; from (0, 1) to (0, h); counts backwards */
*x = 0;
*y = (state->h - rangeno);
*direction = DIR_RIGHT;
return 1;
}
return 0;
}
static int grid2range(const game_state *state, int x, int y, int *rangeno)
{
int ret, x1 = state->w+1, y1 = state->h+1;
if (x > 0 && x < x1 && y > 0 && y < y1) return 0; /* in arena */
if (x < 0 || x > x1 || y < 0 || y > y1) return 0; /* outside grid */
if ((x == 0 || x == x1) && (y == 0 || y == y1))
return 0; /* one of 4 corners */
if (y == 0) { /* top line */
ret = x - 1;
} else if (x == x1) { /* RHS */
ret = y - 1 + state->w;
} else if (y == y1) { /* Bottom [and counts backwards] */
ret = (state->w - x) + state->w + state->h;
} else { /* LHS [and counts backwards ] */
ret = (state->h-y) + state->w + state->w + state->h;
}
*rangeno = ret;
debug(("grid2range: (%d,%d) rangeno = %d\n", x, y, ret));
return 1;
}
static game_state *new_game(midend *me, const game_params *params,
const char *desc)
{
game_state *state = snew(game_state);
int dlen = strlen(desc), i;
unsigned char *bmp;
state->minballs = params->minballs;
state->maxballs = params->maxballs;
state->nballs = ((dlen/2)-2)/2;
bmp = hex2bin(desc, state->nballs*2 + 2);
obfuscate_bitmap(bmp, (state->nballs*2 + 2) * 8, TRUE);
state->w = bmp[0]; state->h = bmp[1];
state->nlasers = 2 * (state->w + state->h);
state->grid = snewn((state->w+2)*(state->h+2), unsigned int);
memset(state->grid, 0, (state->w+2)*(state->h+2) * sizeof(unsigned int));
state->exits = snewn(state->nlasers, unsigned int);
memset(state->exits, LASER_EMPTY, state->nlasers * sizeof(unsigned int));
for (i = 0; i < state->nballs; i++) {
GRID(state, bmp[(i+1)*2 + 0]+1, bmp[(i+1)*2 + 1]+1) = BALL_CORRECT;
}
sfree(bmp);
state->done = state->nguesses = state->reveal = state->justwrong =
state->nright = state->nwrong = state->nmissed = 0;
state->laserno = 1;
return state;
}
#define XFER(x) ret->x = state->x
static game_state *dup_game(const game_state *state)
{
game_state *ret = snew(game_state);
XFER(w); XFER(h);
XFER(minballs); XFER(maxballs);
XFER(nballs); XFER(nlasers);
ret->grid = snewn((ret->w+2)*(ret->h+2), unsigned int);
memcpy(ret->grid, state->grid, (ret->w+2)*(ret->h+2) * sizeof(unsigned int));
ret->exits = snewn(ret->nlasers, unsigned int);
memcpy(ret->exits, state->exits, ret->nlasers * sizeof(unsigned int));
XFER(done);
XFER(laserno);
XFER(nguesses);
XFER(reveal);
XFER(justwrong);
XFER(nright); XFER(nwrong); XFER(nmissed);
return ret;
}
#undef XFER
static void free_game(game_state *state)
{
sfree(state->exits);
sfree(state->grid);
sfree(state);
}
static char *solve_game(const game_state *state, const game_state *currstate,
const char *aux, char **error)
{
return dupstr("S");
}
static int game_can_format_as_text_now(const game_params *params)
{
return TRUE;
}
static char *game_text_format(const game_state *state)
{
return NULL;
}
struct game_ui {
int flash_laserno;
int errors, newmove;
int cur_x, cur_y, cur_visible;
int flash_laser; /* 0 = never, 1 = always, 2 = if anim. */
};
static game_ui *new_ui(const game_state *state)
{
game_ui *ui = snew(game_ui);
ui->flash_laserno = LASER_EMPTY;
ui->errors = 0;
ui->newmove = FALSE;
ui->cur_x = ui->cur_y = 1;
ui->cur_visible = 0;
ui->flash_laser = 0;
return ui;
}
static void free_ui(game_ui *ui)
{
sfree(ui);
}
static char *encode_ui(const game_ui *ui)
{
char buf[80];
/*
* The error counter needs preserving across a serialisation.
*/
sprintf(buf, "E%d", ui->errors);
return dupstr(buf);
}
static void decode_ui(game_ui *ui, const char *encoding)
{
sscanf(encoding, "E%d", &ui->errors);
}
static void game_changed_state(game_ui *ui, const game_state *oldstate,
const game_state *newstate)
{
/*
* If we've encountered a `justwrong' state as a result of
* actually making a move, increment the ui error counter.
*/
if (newstate->justwrong && ui->newmove)
ui->errors++;
ui->newmove = FALSE;
}
#define OFFSET(gx,gy,o) do { \
int off = (4 + (o) % 4) % 4; \
(gx) += offsets[off].x; \
(gy) += offsets[off].y; \
} while(0)
enum { LOOK_LEFT, LOOK_FORWARD, LOOK_RIGHT };
/* Given a position and a direction, check whether we can see a ball in front
* of us, or to our front-left or front-right. */
static int isball(game_state *state, int gx, int gy, int direction, int lookwhere)
{
debug(("isball, (%d, %d), dir %s, lookwhere %s\n", gx, gy, dirstrs[direction],
lookwhere == LOOK_LEFT ? "LEFT" :
lookwhere == LOOK_FORWARD ? "FORWARD" : "RIGHT"));
OFFSET(gx,gy,direction);
if (lookwhere == LOOK_LEFT)
OFFSET(gx,gy,direction-1);
else if (lookwhere == LOOK_RIGHT)
OFFSET(gx,gy,direction+1);
else if (lookwhere != LOOK_FORWARD)
assert(!"unknown lookwhere");
debug(("isball, new (%d, %d)\n", gx, gy));
/* if we're off the grid (into the firing range) there's never a ball. */
if (gx < 1 || gy < 1 || gx > state->w || gy > state->h)
return 0;
if (GRID(state, gx,gy) & BALL_CORRECT)
return 1;
return 0;
}
static int fire_laser_internal(game_state *state, int x, int y, int direction)
{
int unused, lno, tmp;
tmp = grid2range(state, x, y, &lno);
assert(tmp);
/* deal with strange initial reflection rules (that stop
* you turning down the laser range) */
/* I've just chosen to prioritise instant-hit over instant-reflection;
* I can't find anywhere that gives me a definite algorithm for this. */
if (isball(state, x, y, direction, LOOK_FORWARD)) {
debug(("Instant hit at (%d, %d)\n", x, y));
return LASER_HIT; /* hit */
}
if (isball(state, x, y, direction, LOOK_LEFT) ||
isball(state, x, y, direction, LOOK_RIGHT)) {
debug(("Instant reflection at (%d, %d)\n", x, y));
return LASER_REFLECT; /* reflection */
}
/* move us onto the grid. */
OFFSET(x, y, direction);
while (1) {
debug(("fire_laser: looping at (%d, %d) pointing %s\n",
x, y, dirstrs[direction]));
if (grid2range(state, x, y, &unused)) {
int exitno;
tmp = grid2range(state, x, y, &exitno);
assert(tmp);
return (lno == exitno ? LASER_REFLECT : exitno);
}
/* paranoia. This obviously should never happen */
assert(!(GRID(state, x, y) & BALL_CORRECT));
if (isball(state, x, y, direction, LOOK_FORWARD)) {
/* we're facing a ball; send back a reflection. */
debug(("Ball ahead of (%d, %d)", x, y));
return LASER_HIT; /* hit */
}
if (isball(state, x, y, direction, LOOK_LEFT)) {
/* ball to our left; rotate clockwise and look again. */
debug(("Ball to left; turning clockwise.\n"));
direction += 1; direction %= 4;
continue;
}
if (isball(state, x, y, direction, LOOK_RIGHT)) {
/* ball to our right; rotate anti-clockwise and look again. */
debug(("Ball to rightl turning anti-clockwise.\n"));
direction += 3; direction %= 4;
continue;
}
/* ... otherwise, we have no balls ahead of us so just move one step. */
debug(("No balls; moving forwards.\n"));
OFFSET(x, y, direction);
}
}
static int laser_exit(game_state *state, int entryno)
{
int tmp, x, y, direction;
tmp = range2grid(state, entryno, &x, &y, &direction);
assert(tmp);
return fire_laser_internal(state, x, y, direction);
}
static void fire_laser(game_state *state, int entryno)
{
int tmp, exitno, x, y, direction;
tmp = range2grid(state, entryno, &x, &y, &direction);
assert(tmp);
exitno = fire_laser_internal(state, x, y, direction);
if (exitno == LASER_HIT || exitno == LASER_REFLECT) {
GRID(state, x, y) = state->exits[entryno] = exitno;
} else {
int newno = state->laserno++;
int xend, yend, unused;
tmp = range2grid(state, exitno, &xend, &yend, &unused);
assert(tmp);
GRID(state, x, y) = GRID(state, xend, yend) = newno;
state->exits[entryno] = exitno;
state->exits[exitno] = entryno;
}
}
/* Checks that the guessed balls in the state match up with the real balls
* for all possible lasers (i.e. not just the ones that the player might
* have already guessed). This is required because any layout with >4 balls
* might have multiple valid solutions. Returns non-zero for a 'correct'
* (i.e. consistent) layout. */
static int check_guesses(game_state *state, int cagey)
{
game_state *solution, *guesses;
int i, x, y, n, unused, tmp;
int ret = 0;
if (cagey) {
/*
* First, check that each laser the player has already
* fired is consistent with the layout. If not, show them
* one error they've made and reveal no further
* information.
*
* Failing that, check to see whether the player would have
* been able to fire any laser which distinguished the real
* solution from their guess. If so, show them one such
* laser and reveal no further information.
*/
guesses = dup_game(state);
/* clear out BALL_CORRECT on guess, make BALL_GUESS BALL_CORRECT. */
for (x = 1; x <= state->w; x++) {
for (y = 1; y <= state->h; y++) {
GRID(guesses, x, y) &= ~BALL_CORRECT;
if (GRID(guesses, x, y) & BALL_GUESS)
GRID(guesses, x, y) |= BALL_CORRECT;
}
}
n = 0;
for (i = 0; i < guesses->nlasers; i++) {
if (guesses->exits[i] != LASER_EMPTY &&
guesses->exits[i] != laser_exit(guesses, i))
n++;
}
if (n) {
/*
* At least one of the player's existing lasers
* contradicts their ball placement. Pick a random one,
* highlight it, and return.
*
* A temporary random state is created from the current
* grid, so that repeating the same marking will give
* the same answer instead of a different one.
*/
random_state *rs = random_new((char *)guesses->grid,
(state->w+2)*(state->h+2) *
sizeof(unsigned int));
n = random_upto(rs, n);
random_free(rs);
for (i = 0; i < guesses->nlasers; i++) {
if (guesses->exits[i] != LASER_EMPTY &&
guesses->exits[i] != laser_exit(guesses, i) &&
n-- == 0) {
state->exits[i] |= LASER_WRONG;
tmp = laser_exit(state, i);
if (RANGECHECK(state, tmp))
state->exits[tmp] |= LASER_WRONG;
state->justwrong = TRUE;
free_game(guesses);
return 0;
}
}
}
n = 0;
for (i = 0; i < guesses->nlasers; i++) {
if (guesses->exits[i] == LASER_EMPTY &&
laser_exit(state, i) != laser_exit(guesses, i))
n++;
}
if (n) {
/*
* At least one of the player's unfired lasers would
* demonstrate their ball placement to be wrong. Pick a
* random one, highlight it, and return.
*
* A temporary random state is created from the current
* grid, so that repeating the same marking will give
* the same answer instead of a different one.
*/
random_state *rs = random_new((char *)guesses->grid,
(state->w+2)*(state->h+2) *
sizeof(unsigned int));
n = random_upto(rs, n);
random_free(rs);
for (i = 0; i < guesses->nlasers; i++) {
if (guesses->exits[i] == LASER_EMPTY &&
laser_exit(state, i) != laser_exit(guesses, i) &&
n-- == 0) {
fire_laser(state, i);
state->exits[i] |= LASER_OMITTED;
tmp = laser_exit(state, i);
if (RANGECHECK(state, tmp))
state->exits[tmp] |= LASER_OMITTED;
state->justwrong = TRUE;
free_game(guesses);
return 0;
}
}
}
free_game(guesses);
}
/* duplicate the state (to solution) */
solution = dup_game(state);
/* clear out the lasers of solution */
for (i = 0; i < solution->nlasers; i++) {
tmp = range2grid(solution, i, &x, &y, &unused);
assert(tmp);
GRID(solution, x, y) = 0;
solution->exits[i] = LASER_EMPTY;
}
/* duplicate solution to guess. */
guesses = dup_game(solution);
/* clear out BALL_CORRECT on guess, make BALL_GUESS BALL_CORRECT. */
for (x = 1; x <= state->w; x++) {
for (y = 1; y <= state->h; y++) {
GRID(guesses, x, y) &= ~BALL_CORRECT;
if (GRID(guesses, x, y) & BALL_GUESS)
GRID(guesses, x, y) |= BALL_CORRECT;
}
}
/* for each laser (on both game_states), fire it if it hasn't been fired.
* If one has been fired (or received a hit) and another hasn't, we know
* the ball layouts didn't match and can short-circuit return. */
for (i = 0; i < solution->nlasers; i++) {
if (solution->exits[i] == LASER_EMPTY)
fire_laser(solution, i);
if (guesses->exits[i] == LASER_EMPTY)
fire_laser(guesses, i);
}
/* check each game_state's laser against the other; if any differ, return 0 */
ret = 1;
for (i = 0; i < solution->nlasers; i++) {
tmp = range2grid(solution, i, &x, &y, &unused);
assert(tmp);
if (solution->exits[i] != guesses->exits[i]) {
/* If the original state didn't have this shot fired,
* and it would be wrong between the guess and the solution,
* add it. */
if (state->exits[i] == LASER_EMPTY) {
state->exits[i] = solution->exits[i];
if (state->exits[i] == LASER_REFLECT ||
state->exits[i] == LASER_HIT)
GRID(state, x, y) = state->exits[i];
else {
/* add a new shot, incrementing state's laser count. */
int ex, ey, newno = state->laserno++;
tmp = range2grid(state, state->exits[i], &ex, &ey, &unused);
assert(tmp);
GRID(state, x, y) = newno;
GRID(state, ex, ey) = newno;
}
state->exits[i] |= LASER_OMITTED;
} else {
state->exits[i] |= LASER_WRONG;
}
ret = 0;
}
}
if (ret == 0 ||
state->nguesses < state->minballs ||
state->nguesses > state->maxballs) goto done;
/* fix up original state so the 'correct' balls end up matching the guesses,
* as we've just proved that they were equivalent. */
for (x = 1; x <= state->w; x++) {
for (y = 1; y <= state->h; y++) {
if (GRID(state, x, y) & BALL_GUESS)
GRID(state, x, y) |= BALL_CORRECT;
else
GRID(state, x, y) &= ~BALL_CORRECT;
}
}
done:
/* fill in nright and nwrong. */
state->nright = state->nwrong = state->nmissed = 0;
for (x = 1; x <= state->w; x++) {
for (y = 1; y <= state->h; y++) {
int bs = GRID(state, x, y) & (BALL_GUESS | BALL_CORRECT);
if (bs == (BALL_GUESS | BALL_CORRECT))
state->nright++;
else if (bs == BALL_GUESS)
state->nwrong++;
else if (bs == BALL_CORRECT)
state->nmissed++;
}
}
free_game(solution);
free_game(guesses);
state->reveal = 1;
return ret;
}
#define TILE_SIZE (ds->tilesize)
#define TODRAW(x) ((TILE_SIZE * (x)) + (TILE_SIZE / 2))
#define FROMDRAW(x) (((x) - (TILE_SIZE / 2)) / TILE_SIZE)
#define CAN_REVEAL(state) ((state)->nguesses >= (state)->minballs && \
(state)->nguesses <= (state)->maxballs && \
!(state)->reveal && !(state)->justwrong)
struct game_drawstate {
int tilesize, crad, rrad, w, h; /* w and h to make macros work... */
unsigned int *grid; /* as the game_state grid */
int started, reveal;
int flash_laserno, isflash;
};
static char *interpret_move(const game_state *state, game_ui *ui,
const game_drawstate *ds,
int x, int y, int button)
{
int gx = -1, gy = -1, rangeno = -1, wouldflash = 0;
enum { NONE, TOGGLE_BALL, TOGGLE_LOCK, FIRE, REVEAL,
TOGGLE_COLUMN_LOCK, TOGGLE_ROW_LOCK} action = NONE;
char buf[80], *nullret = NULL;
if (IS_CURSOR_MOVE(button)) {
int cx = ui->cur_x, cy = ui->cur_y;
move_cursor(button, &cx, &cy, state->w+2, state->h+2, 0);
if ((cx == 0 && cy == 0 && !CAN_REVEAL(state)) ||
(cx == 0 && cy == state->h+1) ||
(cx == state->w+1 && cy == 0) ||
(cx == state->w+1 && cy == state->h+1))
return NULL; /* disallow moving cursor to corners. */
ui->cur_x = cx;
ui->cur_y = cy;
ui->cur_visible = 1;
return "";
}
if (button == LEFT_BUTTON || button == RIGHT_BUTTON) {
gx = FROMDRAW(x);
gy = FROMDRAW(y);
ui->cur_visible = 0;
wouldflash = 1;
} else if (button == LEFT_RELEASE) {
ui->flash_laser = 0;
return "";
} else if (IS_CURSOR_SELECT(button)) {
if (ui->cur_visible) {
gx = ui->cur_x;
gy = ui->cur_y;
ui->flash_laser = 0;
wouldflash = 2;
} else {
ui->cur_visible = 1;
return "";
}
/* Fix up 'button' for the below logic. */
if (button == CURSOR_SELECT2) button = RIGHT_BUTTON;
else button = LEFT_BUTTON;
}
if (gx != -1 && gy != -1) {
if (gx == 0 && gy == 0 && button == LEFT_BUTTON)
action = REVEAL;
if (gx >= 1 && gx <= state->w && gy >= 1 && gy <= state->h) {
if (button == LEFT_BUTTON) {
if (!(GRID(state, gx,gy) & BALL_LOCK))
action = TOGGLE_BALL;
} else
action = TOGGLE_LOCK;
}
if (grid2range(state, gx, gy, &rangeno)) {
if (button == LEFT_BUTTON)
action = FIRE;
else if (gy == 0 || gy > state->h)
action = TOGGLE_COLUMN_LOCK; /* and use gx */
else
action = TOGGLE_ROW_LOCK; /* and use gy */
}
}
switch (action) {
case TOGGLE_BALL:
sprintf(buf, "T%d,%d", gx, gy);
break;
case TOGGLE_LOCK:
sprintf(buf, "LB%d,%d", gx, gy);
break;
case TOGGLE_COLUMN_LOCK:
sprintf(buf, "LC%d", gx);
break;
case TOGGLE_ROW_LOCK:
sprintf(buf, "LR%d", gy);
break;
case FIRE:
if (state->reveal && state->exits[rangeno] == LASER_EMPTY)
return nullret;
ui->flash_laserno = rangeno;
ui->flash_laser = wouldflash;
nullret = "";
if (state->exits[rangeno] != LASER_EMPTY)
return "";
sprintf(buf, "F%d", rangeno);
break;
case REVEAL:
if (!CAN_REVEAL(state)) return nullret;
if (ui->cur_visible == 1) ui->cur_x = ui->cur_y = 1;
sprintf(buf, "R");
break;
default:
return nullret;
}
if (state->reveal) return nullret;
ui->newmove = TRUE;
return dupstr(buf);
}
static game_state *execute_move(const game_state *from, const char *move)
{
game_state *ret = dup_game(from);
int gx = -1, gy = -1, rangeno = -1;
if (ret->justwrong) {
int i;
ret->justwrong = FALSE;
for (i = 0; i < ret->nlasers; i++)
if (ret->exits[i] != LASER_EMPTY)
ret->exits[i] &= ~(LASER_OMITTED | LASER_WRONG);
}
if (!strcmp(move, "S")) {
check_guesses(ret, FALSE);
return ret;
}
if (from->reveal) goto badmove;
if (!*move) goto badmove;
switch (move[0]) {
case 'T':
sscanf(move+1, "%d,%d", &gx, &gy);
if (gx < 1 || gy < 1 || gx > ret->w || gy > ret->h)
goto badmove;
if (GRID(ret, gx, gy) & BALL_GUESS) {
ret->nguesses--;
GRID(ret, gx, gy) &= ~BALL_GUESS;
} else {
ret->nguesses++;
GRID(ret, gx, gy) |= BALL_GUESS;
}
break;
case 'F':
sscanf(move+1, "%d", &rangeno);
if (ret->exits[rangeno] != LASER_EMPTY)
goto badmove;
if (!RANGECHECK(ret, rangeno))
goto badmove;
fire_laser(ret, rangeno);
break;
case 'R':
if (ret->nguesses < ret->minballs ||
ret->nguesses > ret->maxballs)
goto badmove;
check_guesses(ret, TRUE);
break;
case 'L':
{
int lcount = 0;
if (strlen(move) < 2) goto badmove;
switch (move[1]) {
case 'B':
sscanf(move+2, "%d,%d", &gx, &gy);
if (gx < 1 || gy < 1 || gx > ret->w || gy > ret->h)
goto badmove;
GRID(ret, gx, gy) ^= BALL_LOCK;
break;
#define COUNTLOCK do { if (GRID(ret, gx, gy) & BALL_LOCK) lcount++; } while (0)
#define SETLOCKIF(c) do { \
if (lcount > (c)) GRID(ret, gx, gy) &= ~BALL_LOCK; \
else GRID(ret, gx, gy) |= BALL_LOCK; \
} while(0)
case 'C':
sscanf(move+2, "%d", &gx);
if (gx < 1 || gx > ret->w) goto badmove;
for (gy = 1; gy <= ret->h; gy++) { COUNTLOCK; }
for (gy = 1; gy <= ret->h; gy++) { SETLOCKIF(ret->h/2); }
break;
case 'R':
sscanf(move+2, "%d", &gy);
if (gy < 1 || gy > ret->h) goto badmove;
for (gx = 1; gx <= ret->w; gx++) { COUNTLOCK; }
for (gx = 1; gx <= ret->w; gx++) { SETLOCKIF(ret->w/2); }
break;
#undef COUNTLOCK
#undef SETLOCKIF
default:
goto badmove;
}
}
break;
default:
goto badmove;
}
return ret;
badmove:
free_game(ret);
return NULL;
}
/* ----------------------------------------------------------------------
* Drawing routines.
*/
static void game_compute_size(const game_params *params, int tilesize,
int *x, int *y)
{
/* Border is ts/2, to make things easier.
* Thus we have (width) + 2 (firing range*2) + 1 (border*2) tiles
* across, and similarly height + 2 + 1 tiles down. */
*x = (params->w + 3) * tilesize;
*y = (params->h + 3) * tilesize;
}
static void game_set_size(drawing *dr, game_drawstate *ds,
const game_params *params, int tilesize)
{
ds->tilesize = tilesize;
ds->crad = (tilesize-1)/2;
ds->rrad = (3*tilesize)/8;
}
static float *game_colours(frontend *fe, int *ncolours)
{
float *ret = snewn(3 * NCOLOURS, float);
int i;
game_mkhighlight(fe, ret, COL_BACKGROUND, COL_HIGHLIGHT, COL_LOWLIGHT);
ret[COL_BALL * 3 + 0] = 0.0F;
ret[COL_BALL * 3 + 1] = 0.0F;
ret[COL_BALL * 3 + 2] = 0.0F;
ret[COL_WRONG * 3 + 0] = 1.0F;
ret[COL_WRONG * 3 + 1] = 0.0F;
ret[COL_WRONG * 3 + 2] = 0.0F;
ret[COL_BUTTON * 3 + 0] = 0.0F;
ret[COL_BUTTON * 3 + 1] = 1.0F;
ret[COL_BUTTON * 3 + 2] = 0.0F;
ret[COL_CURSOR * 3 + 0] = 1.0F;
ret[COL_CURSOR * 3 + 1] = 0.0F;
ret[COL_CURSOR * 3 + 2] = 0.0F;
for (i = 0; i < 3; i++) {
ret[COL_GRID * 3 + i] = ret[COL_BACKGROUND * 3 + i] * 0.9F;
ret[COL_LOCK * 3 + i] = ret[COL_BACKGROUND * 3 + i] * 0.7F;
ret[COL_COVER * 3 + i] = ret[COL_BACKGROUND * 3 + i] * 0.5F;
ret[COL_TEXT * 3 + i] = 0.0F;
}
ret[COL_FLASHTEXT * 3 + 0] = 0.0F;
ret[COL_FLASHTEXT * 3 + 1] = 1.0F;
ret[COL_FLASHTEXT * 3 + 2] = 0.0F;
*ncolours = NCOLOURS;
return ret;
}
static game_drawstate *game_new_drawstate(drawing *dr, const game_state *state)
{
struct game_drawstate *ds = snew(struct game_drawstate);
ds->tilesize = 0;
ds->w = state->w; ds->h = state->h;
ds->grid = snewn((state->w+2)*(state->h+2), unsigned int);
memset(ds->grid, 0, (state->w+2)*(state->h+2)*sizeof(unsigned int));
ds->started = ds->reveal = 0;
ds->flash_laserno = LASER_EMPTY;
ds->isflash = 0;
return ds;
}
static void game_free_drawstate(drawing *dr, game_drawstate *ds)
{
sfree(ds->grid);
sfree(ds);
}
static void draw_square_cursor(drawing *dr, game_drawstate *ds, int dx, int dy)
{
int coff = TILE_SIZE/8;
draw_rect_outline(dr, dx + coff, dy + coff,
TILE_SIZE - coff*2,
TILE_SIZE - coff*2,
COL_CURSOR);
}
static void draw_arena_tile(drawing *dr, const game_state *gs,
game_drawstate *ds, const game_ui *ui,
int ax, int ay, int force, int isflash)
{
int gx = ax+1, gy = ay+1;
int gs_tile = GRID(gs, gx, gy), ds_tile = GRID(ds, gx, gy);
int dx = TODRAW(gx), dy = TODRAW(gy);
if (ui->cur_visible && ui->cur_x == gx && ui->cur_y == gy)
gs_tile |= FLAG_CURSOR;
if (gs_tile != ds_tile || gs->reveal != ds->reveal || force) {
int bcol, ocol, bg;
bg = (gs->reveal ? COL_BACKGROUND :
(gs_tile & BALL_LOCK) ? COL_LOCK : COL_COVER);
draw_rect(dr, dx, dy, TILE_SIZE, TILE_SIZE, bg);
draw_rect_outline(dr, dx, dy, TILE_SIZE, TILE_SIZE, COL_GRID);
if (gs->reveal) {
/* Guessed balls are always black; if they're incorrect they'll
* have a red cross added later.
* Missing balls are red. */
if (gs_tile & BALL_GUESS) {
bcol = isflash ? bg : COL_BALL;
} else if (gs_tile & BALL_CORRECT) {
bcol = isflash ? bg : COL_WRONG;
} else {
bcol = bg;
}
} else {
/* guesses are black/black, all else background. */
if (gs_tile & BALL_GUESS) {
bcol = COL_BALL;
} else {
bcol = bg;
}
}
ocol = (gs_tile & FLAG_CURSOR && bcol != bg) ? COL_CURSOR : bcol;
draw_circle(dr, dx + TILE_SIZE/2, dy + TILE_SIZE/2, ds->crad-1,
ocol, ocol);
draw_circle(dr, dx + TILE_SIZE/2, dy + TILE_SIZE/2, ds->crad-3,
bcol, bcol);
if (gs_tile & FLAG_CURSOR && bcol == bg)
draw_square_cursor(dr, ds, dx, dy);
if (gs->reveal &&
(gs_tile & BALL_GUESS) &&
!(gs_tile & BALL_CORRECT)) {
int x1 = dx + 3, y1 = dy + 3;
int x2 = dx + TILE_SIZE - 3, y2 = dy + TILE_SIZE-3;
int coords[8];
/* Incorrect guess; draw a red cross over the ball. */
coords[0] = x1-1;
coords[1] = y1+1;
coords[2] = x1+1;
coords[3] = y1-1;
coords[4] = x2+1;
coords[5] = y2-1;
coords[6] = x2-1;
coords[7] = y2+1;
draw_polygon(dr, coords, 4, COL_WRONG, COL_WRONG);
coords[0] = x2+1;
coords[1] = y1+1;
coords[2] = x2-1;
coords[3] = y1-1;
coords[4] = x1-1;
coords[5] = y2-1;
coords[6] = x1+1;
coords[7] = y2+1;
draw_polygon(dr, coords, 4, COL_WRONG, COL_WRONG);
}
draw_update(dr, dx, dy, TILE_SIZE, TILE_SIZE);
}
GRID(ds,gx,gy) = gs_tile;
}
static void draw_laser_tile(drawing *dr, const game_state *gs,
game_drawstate *ds, const game_ui *ui,
int lno, int force)
{
int gx, gy, dx, dy, unused;
int wrong, omitted, reflect, hit, laserval, flash = 0, tmp;
unsigned int gs_tile, ds_tile, exitno;
tmp = range2grid(gs, lno, &gx, &gy, &unused);
assert(tmp);
gs_tile = GRID(gs, gx, gy);
ds_tile = GRID(ds, gx, gy);
dx = TODRAW(gx);
dy = TODRAW(gy);
wrong = gs->exits[lno] & LASER_WRONG;
omitted = gs->exits[lno] & LASER_OMITTED;
exitno = gs->exits[lno] & ~LASER_FLAGMASK;
reflect = gs_tile & LASER_REFLECT;
hit = gs_tile & LASER_HIT;
laserval = gs_tile & ~LASER_FLAGMASK;
if (lno == ds->flash_laserno)
gs_tile |= LASER_FLASHED;
else if (!(gs->exits[lno] & (LASER_HIT | LASER_REFLECT))) {
if (exitno == ds->flash_laserno)
gs_tile |= LASER_FLASHED;
}
if (gs_tile & LASER_FLASHED) flash = 1;
gs_tile |= wrong | omitted;
if (ui->cur_visible && ui->cur_x == gx && ui->cur_y == gy)
gs_tile |= FLAG_CURSOR;
if (gs_tile != ds_tile || force) {
draw_rect(dr, dx, dy, TILE_SIZE, TILE_SIZE, COL_BACKGROUND);
draw_rect_outline(dr, dx, dy, TILE_SIZE, TILE_SIZE, COL_GRID);
if (gs_tile &~ (LASER_WRONG | LASER_OMITTED | FLAG_CURSOR)) {
char str[32];
int tcol = flash ? COL_FLASHTEXT : omitted ? COL_WRONG : COL_TEXT;
if (reflect || hit)
sprintf(str, "%s", reflect ? "R" : "H");
else
sprintf(str, "%d", laserval);
if (wrong) {
draw_circle(dr, dx + TILE_SIZE/2, dy + TILE_SIZE/2,
ds->rrad,
COL_WRONG, COL_WRONG);
draw_circle(dr, dx + TILE_SIZE/2, dy + TILE_SIZE/2,
ds->rrad - TILE_SIZE/16,
COL_BACKGROUND, COL_WRONG);
}
draw_text(dr, dx + TILE_SIZE/2, dy + TILE_SIZE/2,
FONT_VARIABLE, TILE_SIZE/2, ALIGN_VCENTRE | ALIGN_HCENTRE,
tcol, str);
}
if (gs_tile & FLAG_CURSOR)
draw_square_cursor(dr, ds, dx, dy);
draw_update(dr, dx, dy, TILE_SIZE, TILE_SIZE);
}
GRID(ds, gx, gy) = gs_tile;
}
#define CUR_ANIM 0.2F
static void game_redraw(drawing *dr, game_drawstate *ds,
const game_state *oldstate, const game_state *state,
int dir, const game_ui *ui,
float animtime, float flashtime)
{
int i, x, y, ts = TILE_SIZE, isflash = 0, force = 0;
if (flashtime > 0) {
int frame = (int)(flashtime / FLASH_FRAME);
isflash = (frame % 2) == 0;
debug(("game_redraw: flashtime = %f", flashtime));
}
if (!ds->started) {
int x0 = TODRAW(0)-1, y0 = TODRAW(0)-1;
int x1 = TODRAW(state->w+2), y1 = TODRAW(state->h+2);
draw_rect(dr, 0, 0,
TILE_SIZE * (state->w+3), TILE_SIZE * (state->h+3),
COL_BACKGROUND);
/* clockwise around the outline starting at pt behind (1,1). */
draw_line(dr, x0+ts, y0+ts, x0+ts, y0, COL_HIGHLIGHT);
draw_line(dr, x0+ts, y0, x1-ts, y0, COL_HIGHLIGHT);
draw_line(dr, x1-ts, y0, x1-ts, y0+ts, COL_LOWLIGHT);
draw_line(dr, x1-ts, y0+ts, x1, y0+ts, COL_HIGHLIGHT);
draw_line(dr, x1, y0+ts, x1, y1-ts, COL_LOWLIGHT);
draw_line(dr, x1, y1-ts, x1-ts, y1-ts, COL_LOWLIGHT);
draw_line(dr, x1-ts, y1-ts, x1-ts, y1, COL_LOWLIGHT);
draw_line(dr, x1-ts, y1, x0+ts, y1, COL_LOWLIGHT);
draw_line(dr, x0+ts, y1, x0+ts, y1-ts, COL_HIGHLIGHT);
draw_line(dr, x0+ts, y1-ts, x0, y1-ts, COL_LOWLIGHT);
draw_line(dr, x0, y1-ts, x0, y0+ts, COL_HIGHLIGHT);
draw_line(dr, x0, y0+ts, x0+ts, y0+ts, COL_HIGHLIGHT);
/* phew... */
draw_update(dr, 0, 0,
TILE_SIZE * (state->w+3), TILE_SIZE * (state->h+3));
force = 1;
ds->started = 1;
}
if (isflash != ds->isflash) force = 1;
/* draw the arena */
for (x = 0; x < state->w; x++) {
for (y = 0; y < state->h; y++) {
draw_arena_tile(dr, state, ds, ui, x, y, force, isflash);
}
}
/* draw the lasers */
ds->flash_laserno = LASER_EMPTY;
if (ui->flash_laser == 1)
ds->flash_laserno = ui->flash_laserno;
else if (ui->flash_laser == 2 && animtime > 0)
ds->flash_laserno = ui->flash_laserno;
for (i = 0; i < 2*(state->w+state->h); i++) {
draw_laser_tile(dr, state, ds, ui, i, force);
}
/* draw the 'finish' button */
if (CAN_REVEAL(state)) {
int outline = (ui->cur_visible && ui->cur_x == 0 && ui->cur_y == 0)
? COL_CURSOR : COL_BALL;
clip(dr, TODRAW(0)-1, TODRAW(0)-1, TILE_SIZE+1, TILE_SIZE+1);
draw_circle(dr, TODRAW(0) + ds->crad, TODRAW(0) + ds->crad, ds->crad,
outline, outline);
draw_circle(dr, TODRAW(0) + ds->crad, TODRAW(0) + ds->crad, ds->crad-2,
COL_BUTTON, COL_BUTTON);
unclip(dr);
} else {
draw_rect(dr, TODRAW(0)-1, TODRAW(0)-1,
TILE_SIZE+1, TILE_SIZE+1, COL_BACKGROUND);
}
draw_update(dr, TODRAW(0), TODRAW(0), TILE_SIZE, TILE_SIZE);
ds->reveal = state->reveal;
ds->isflash = isflash;
{
char buf[256];
if (ds->reveal) {
if (state->nwrong == 0 &&
state->nmissed == 0 &&
state->nright >= state->minballs)
sprintf(buf, "CORRECT!");
else
sprintf(buf, "%d wrong and %d missed balls.",
state->nwrong, state->nmissed);
} else if (state->justwrong) {
sprintf(buf, "Wrong! Guess again.");
} else {
if (state->nguesses > state->maxballs)
sprintf(buf, "%d too many balls marked.",
state->nguesses - state->maxballs);
else if (state->nguesses <= state->maxballs &&
state->nguesses >= state->minballs)
sprintf(buf, "Click button to verify guesses.");
else if (state->maxballs == state->minballs)
sprintf(buf, "Balls marked: %d / %d",
state->nguesses, state->minballs);
else
sprintf(buf, "Balls marked: %d / %d-%d.",
state->nguesses, state->minballs, state->maxballs);
}
if (ui->errors) {
sprintf(buf + strlen(buf), " (%d error%s)",
ui->errors, ui->errors > 1 ? "s" : "");
}
status_bar(dr, buf);
}
}
static float game_anim_length(const game_state *oldstate,
const game_state *newstate, int dir, game_ui *ui)
{
return (ui->flash_laser == 2) ? CUR_ANIM : 0.0F;
}
static float game_flash_length(const game_state *oldstate,
const game_state *newstate, int dir, game_ui *ui)
{
if (!oldstate->reveal && newstate->reveal)
return 4.0F * FLASH_FRAME;
else
return 0.0F;
}
static int game_status(const game_state *state)
{
if (state->reveal) {
/*
* We return nonzero whenever the solution has been revealed,
* even (on spoiler grounds) if it wasn't guessed correctly.
*/
if (state->nwrong == 0 &&
state->nmissed == 0 &&
state->nright >= state->minballs)
return +1;
else
return -1;
}
return 0;
}
static int game_timing_state(const game_state *state, game_ui *ui)
{
return TRUE;
}
static void game_print_size(const game_params *params, float *x, float *y)
{
}
static void game_print(drawing *dr, const game_state *state, int tilesize)
{
}
#ifdef COMBINED
#define thegame blackbox
#endif
const struct game thegame = {
"Black Box", "games.blackbox", "blackbox",
default_params,
game_fetch_preset, NULL,
decode_params,
encode_params,
free_params,
dup_params,
TRUE, game_configure, custom_params,
validate_params,
new_game_desc,
validate_desc,
new_game,
dup_game,
free_game,
TRUE, solve_game,
FALSE, game_can_format_as_text_now, game_text_format,
new_ui,
free_ui,
encode_ui,
decode_ui,
game_changed_state,
interpret_move,
execute_move,
PREFERRED_TILE_SIZE, game_compute_size, game_set_size,
game_colours,
game_new_drawstate,
game_free_drawstate,
game_redraw,
game_anim_length,
game_flash_length,
game_status,
FALSE, FALSE, game_print_size, game_print,
TRUE, /* wants_statusbar */
FALSE, game_timing_state,
REQUIRE_RBUTTON, /* flags */
};
/* vim: set shiftwidth=4 tabstop=8: */
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