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Configuration dialog box, on the GTK front end only as yet.

Browse Source 
[originally from svn r4182]
This commit is contained in:
Simon Tatham
2004-05-01 11:32:12 +00:00
parent b1bfb378f4
commit 44ff00665b
8 changed files with 623 additions and 10 deletions
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106
cube.c
View File

@ -11,6 +11,7 @@
#include "puzzles.h"
const char *const game_name = "Cube";
const int game_can_configure = TRUE;
#define MAXVERTICES 20
#define MAXFACES 20
@ -238,8 +239,8 @@ int game_fetch_preset(int i, char **name, game_params **params)
case 1:
str = "Tetrahedron";
ret->solid = TETRAHEDRON;
ret->d1 = 2;
ret->d2 = 1;
ret->d1 = 1;
ret->d2 = 2;
break;
case 2:
str = "Octahedron";
@ -324,12 +325,12 @@ static void enum_grid_squares(game_params *params,
float theight = (float)(sqrt(3) / 2.0);
for (row = 0; row < params->d1 + params->d2; row++) {
if (row < params->d1) {
if (row < params->d2) {
other = +1;
rowlen = row + params->d2;
rowlen = row + params->d1;
} else {
other = -1;
rowlen = 2*params->d1 + params->d2 - row;
rowlen = 2*params->d2 + params->d1 - row;
}
/*
@ -415,7 +416,7 @@ static void enum_grid_squares(game_params *params,
sq.flip = FALSE;
if (firstix < 0)
firstix = ix;
firstix = (ix - 1) & 3;
ix -= firstix;
sq.tetra_class = ((row+(ix&1)) & 2) ^ (ix & 3);
@ -443,6 +444,99 @@ static int grid_area(int d1, int d2, int order)
return d1*d1 + d2*d2 + 4*d1*d2;
}
config_item *game_configure(game_params *params)
{
config_item *ret = snewn(4, config_item);
char buf[80];
ret[0].name = "Type of solid";
ret[0].type = CHOICES;
ret[0].sval = ":Tetrahedron:Cube:Octahedron:Icosahedron";
ret[0].ival = params->solid;
ret[1].name = "Width / top";
ret[1].type = STRING;
sprintf(buf, "%d", params->d1);
ret[1].sval = dupstr(buf);
ret[1].ival = 0;
ret[2].name = "Height / bottom";
ret[2].type = STRING;
sprintf(buf, "%d", params->d2);
ret[2].sval = dupstr(buf);
ret[2].ival = 0;
ret[3].name = NULL;
ret[3].type = ENDCFG;
ret[3].sval = NULL;
ret[3].ival = 0;
return ret;
}
game_params *custom_params(config_item *cfg)
{
game_params *ret = snew(game_params);
ret->solid = cfg[0].ival;
ret->d1 = atoi(cfg[1].sval);
ret->d2 = atoi(cfg[2].sval);
return ret;
}
static void count_grid_square_callback(void *ctx, struct grid_square *sq)
{
int *classes = (int *)ctx;
int thisclass;
if (classes[4] == 4)
thisclass = sq->tetra_class;
else if (classes[4] == 2)
thisclass = sq->flip;
else
thisclass = 0;
classes[thisclass]++;
}
char *validate_params(game_params *params)
{
int classes[5];
int i;
if (params->solid < 0 || params->solid >= lenof(solids))
return "Unrecognised solid type";
if (solids[params->solid]->order == 4) {
if (params->d1 <= 0 || params->d2 <= 0)
return "Both grid dimensions must be greater than zero";
} else {
if (params->d1 <= 0 && params->d2 <= 0)
return "At least one grid dimension must be greater than zero";
}
for (i = 0; i < 4; i++)
classes[i] = 0;
if (params->solid == TETRAHEDRON)
classes[4] = 4;
else if (params->solid == OCTAHEDRON)
classes[4] = 2;
else
classes[4] = 1;
enum_grid_squares(params, count_grid_square_callback, classes);
for (i = 0; i < classes[4]; i++)
if (classes[i] < solids[params->solid]->nfaces / classes[4])
return "Not enough grid space to place all blue faces";
if (grid_area(params->d1, params->d2, solids[params->solid]->order) <
solids[params->solid]->nfaces + 1)
return "Not enough space to place the solid on an empty square";
return NULL;
}
struct grid_data {
int *gridptrs[4];
int nsquares[4];

46
fifteen.c
View File

@ -11,6 +11,7 @@
#include "puzzles.h"
const char *const game_name = "Fifteen";
const int game_can_configure = TRUE;
#define TILE_SIZE 48
#define BORDER (TILE_SIZE / 2)
@ -71,6 +72,51 @@ game_params *dup_params(game_params *params)
return ret;
}
config_item *game_configure(game_params *params)
{
config_item *ret;
char buf[80];
ret = snewn(3, config_item);
ret[0].name = "Width";
ret[0].type = STRING;
sprintf(buf, "%d", params->w);
ret[0].sval = dupstr(buf);
ret[0].ival = 0;
ret[1].name = "Height";
ret[1].type = STRING;
sprintf(buf, "%d", params->h);
ret[1].sval = dupstr(buf);
ret[1].ival = 0;
ret[2].name = NULL;
ret[2].type = ENDCFG;
ret[2].sval = NULL;
ret[2].ival = 0;
return ret;
}
game_params *custom_params(config_item *cfg)
{
game_params *ret = snew(game_params);
ret->w = atoi(cfg[0].sval);
ret->h = atoi(cfg[1].sval);
return ret;
}
char *validate_params(game_params *params)
{
if (params->w < 2 && params->h < 2)
return "Width and height must both be at least two";
return NULL;
}
int perm_parity(int *perm, int n)
{
int i, j, ret;

277
gtk.c
View File

@ -7,6 +7,7 @@
#include <stdlib.h>
#include <time.h>
#include <stdarg.h>
#include <string.h>
#include <gtk/gtk.h>
#include <gdk/gdkkeysyms.h>
@ -64,6 +65,9 @@ struct frontend {
int timer_active, timer_id;
struct font *fonts;
int nfonts, fontsize;
config_item *cfg;
int cfgret;
GtkWidget *cfgbox;
};
void frontend_default_colour(frontend *fe, float *output)
@ -370,6 +374,252 @@ void activate_timer(frontend *fe)
fe->timer_active = TRUE;
}
static void window_destroy(GtkWidget *widget, gpointer data)
{
gtk_main_quit();
}
static void errmsg_button_clicked(GtkButton *button, gpointer data)
{
gtk_widget_destroy(GTK_WIDGET(data));
}
void error_box(GtkWidget *parent, char *msg)
{
GtkWidget *window, *hbox, *text, *ok;
window = gtk_dialog_new();
text = gtk_label_new(msg);
gtk_misc_set_alignment(GTK_MISC(text), 0.0, 0.0);
hbox = gtk_hbox_new(FALSE, 0);
gtk_box_pack_start(GTK_BOX(hbox), text, FALSE, FALSE, 20);
gtk_box_pack_start(GTK_BOX(GTK_DIALOG(window)->vbox),
hbox, FALSE, FALSE, 20);
gtk_widget_show(text);
gtk_widget_show(hbox);
gtk_window_set_title(GTK_WINDOW(window), "Error");
gtk_label_set_line_wrap(GTK_LABEL(text), TRUE);
ok = gtk_button_new_with_label("OK");
gtk_box_pack_end(GTK_BOX(GTK_DIALOG(window)->action_area),
ok, FALSE, FALSE, 0);
gtk_widget_show(ok);
GTK_WIDGET_SET_FLAGS(ok, GTK_CAN_DEFAULT);
gtk_window_set_default(GTK_WINDOW(window), ok);
gtk_signal_connect(GTK_OBJECT(ok), "clicked",
GTK_SIGNAL_FUNC(errmsg_button_clicked), window);
gtk_signal_connect(GTK_OBJECT(window), "destroy",
GTK_SIGNAL_FUNC(window_destroy), NULL);
gtk_window_set_modal(GTK_WINDOW(window), TRUE);
gtk_window_set_transient_for(GTK_WINDOW(window), GTK_WINDOW(parent));
//set_transient_window_pos(parent, window);
gtk_widget_show(window);
gtk_main();
}
static void config_ok_button_clicked(GtkButton *button, gpointer data)
{
frontend *fe = (frontend *)data;
char *err;
err = midend_set_config(fe->me, fe->cfg);
if (err)
error_box(fe->cfgbox, err);
else {
fe->cfgret = TRUE;
gtk_widget_destroy(fe->cfgbox);
}
}
static void config_cancel_button_clicked(GtkButton *button, gpointer data)
{
frontend *fe = (frontend *)data;
gtk_widget_destroy(fe->cfgbox);
}
static void editbox_changed(GtkEditable *ed, gpointer data)
{
config_item *i = (config_item *)data;
sfree(i->sval);
i->sval = dupstr(gtk_entry_get_text(GTK_ENTRY(ed)));
}
static void button_toggled(GtkToggleButton *tb, gpointer data)
{
config_item *i = (config_item *)data;
i->ival = gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(tb));
}
static void droplist_sel(GtkMenuItem *item, gpointer data)
{
config_item *i = (config_item *)data;
i->ival = GPOINTER_TO_INT(gtk_object_get_data(GTK_OBJECT(item),
"user-data"));
}
static int get_config(frontend *fe)
{
GtkWidget *w, *table;
config_item *i;
int y;
fe->cfg = midend_get_config(fe->me);
fe->cfgret = FALSE;
fe->cfgbox = gtk_dialog_new();
gtk_window_set_title(GTK_WINDOW(fe->cfgbox), "Configure");
w = gtk_button_new_with_label("OK");
gtk_box_pack_end(GTK_BOX(GTK_DIALOG(fe->cfgbox)->action_area),
w, FALSE, FALSE, 0);
gtk_widget_show(w);
GTK_WIDGET_SET_FLAGS(w, GTK_CAN_DEFAULT);
gtk_window_set_default(GTK_WINDOW(fe->cfgbox), w);
gtk_signal_connect(GTK_OBJECT(w), "clicked",
GTK_SIGNAL_FUNC(config_ok_button_clicked), fe);
w = gtk_button_new_with_label("Cancel");
gtk_box_pack_end(GTK_BOX(GTK_DIALOG(fe->cfgbox)->action_area),
w, FALSE, FALSE, 0);
gtk_widget_show(w);
gtk_signal_connect(GTK_OBJECT(w), "clicked",
GTK_SIGNAL_FUNC(config_cancel_button_clicked), fe);
table = gtk_table_new(1, 2, FALSE);
y = 0;
gtk_box_pack_end(GTK_BOX(GTK_DIALOG(fe->cfgbox)->vbox),
table, FALSE, FALSE, 0);
gtk_widget_show(table);
for (i = fe->cfg; i->type != ENDCFG; i++) {
gtk_table_resize(GTK_TABLE(table), y+1, 2);
switch (i->type) {
case STRING:
/*
* Edit box with a label beside it.
*/
w = gtk_label_new(i->name);
gtk_misc_set_alignment(GTK_MISC(w), 0.0, 0.5);
gtk_table_attach(GTK_TABLE(table), w, 0, 1, y, y+1,
GTK_EXPAND | GTK_SHRINK | GTK_FILL,
GTK_EXPAND | GTK_SHRINK | GTK_FILL,
3, 3);
gtk_widget_show(w);
w = gtk_entry_new();
gtk_table_attach(GTK_TABLE(table), w, 1, 2, y, y+1,
GTK_EXPAND | GTK_SHRINK | GTK_FILL,
GTK_EXPAND | GTK_SHRINK | GTK_FILL,
3, 3);
gtk_entry_set_text(GTK_ENTRY(w), i->sval);
gtk_signal_connect(GTK_OBJECT(w), "changed",
GTK_SIGNAL_FUNC(editbox_changed), i);
gtk_widget_show(w);
break;
case BOOLEAN:
/*
* Simple checkbox.
*/
w = gtk_check_button_new_with_label(i->name);
gtk_signal_connect(GTK_OBJECT(w), "toggled",
GTK_SIGNAL_FUNC(button_toggled), i);
gtk_table_attach(GTK_TABLE(table), w, 0, 2, y, y+1,
GTK_EXPAND | GTK_SHRINK | GTK_FILL,
GTK_EXPAND | GTK_SHRINK | GTK_FILL,
3, 3);
gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(w), i->ival);
gtk_widget_show(w);
break;
case CHOICES:
/*
* Drop-down list (GtkOptionMenu).
*/
w = gtk_label_new(i->name);
gtk_misc_set_alignment(GTK_MISC(w), 0.0, 0.5);
gtk_table_attach(GTK_TABLE(table), w, 0, 1, y, y+1,
GTK_EXPAND | GTK_SHRINK | GTK_FILL,
GTK_EXPAND | GTK_SHRINK | GTK_FILL,
3, 3);
gtk_widget_show(w);
w = gtk_option_menu_new();
gtk_table_attach(GTK_TABLE(table), w, 1, 2, y, y+1,
GTK_EXPAND | GTK_SHRINK | GTK_FILL,
GTK_EXPAND | GTK_SHRINK | GTK_FILL,
3, 3);
gtk_widget_show(w);
{
int c, val;
char *p, *q, *name;
GtkWidget *menuitem;
GtkWidget *menu = gtk_menu_new();
gtk_option_menu_set_menu(GTK_OPTION_MENU(w), menu);
c = *i->sval;
p = i->sval+1;
val = 0;
while (*p) {
q = p;
while (*q && *q != c)
q++;
name = snewn(q-p+1, char);
strncpy(name, p, q-p);
name[q-p] = '\0';
if (*q) q++; /* eat delimiter */
menuitem = gtk_menu_item_new_with_label(name);
gtk_container_add(GTK_CONTAINER(menu), menuitem);
gtk_object_set_data(GTK_OBJECT(menuitem), "user-data",
GINT_TO_POINTER(val));
gtk_signal_connect(GTK_OBJECT(menuitem), "activate",
GTK_SIGNAL_FUNC(droplist_sel), i);
gtk_widget_show(menuitem);
val++;
p = q;
}
gtk_option_menu_set_history(GTK_OPTION_MENU(w), i->ival);
}
break;
}
y++;
}
gtk_signal_connect(GTK_OBJECT(fe->cfgbox), "destroy",
GTK_SIGNAL_FUNC(window_destroy), NULL);
gtk_window_set_modal(GTK_WINDOW(fe->cfgbox), TRUE);
gtk_window_set_transient_for(GTK_WINDOW(fe->cfgbox),
GTK_WINDOW(fe->window));
//set_transient_window_pos(fe->window, fe->cfgbox);
gtk_widget_show(fe->cfgbox);
gtk_main();
/*
* FIXME: free fe->cfg
*/
return fe->cfgret;
}
static void menu_key_event(GtkMenuItem *menuitem, gpointer data)
{
frontend *fe = (frontend *)data;
@ -394,6 +644,21 @@ static void menu_preset_event(GtkMenuItem *menuitem, gpointer data)
fe->h = y;
}
static void menu_config_event(GtkMenuItem *menuitem, gpointer data)
{
frontend *fe = (frontend *)data;
int x, y;
if (!get_config(fe))
return;
midend_new_game(fe->me, NULL);
midend_size(fe->me, &x, &y);
gtk_drawing_area_size(GTK_DRAWING_AREA(fe->area), x, y);
fe->w = x;
fe->h = y;
}
static GtkWidget *add_menu_item_with_key(frontend *fe, GtkContainer *cont,
char *text, int key)
{
@ -451,12 +716,12 @@ static frontend *new_window(void)
add_menu_item_with_key(fe, GTK_CONTAINER(menu), "New", 'n');
add_menu_item_with_key(fe, GTK_CONTAINER(menu), "Restart", 'r');
if ((n = midend_num_presets(fe->me)) > 0) {
if ((n = midend_num_presets(fe->me)) > 0 || game_can_configure) {
GtkWidget *submenu;
int i;
menuitem = gtk_menu_item_new_with_label("Type");
gtk_container_add(GTK_CONTAINER(menu), menuitem);
gtk_container_add(GTK_CONTAINER(menubar), menuitem);
gtk_widget_show(menuitem);
submenu = gtk_menu_new();
@ -475,6 +740,14 @@ static frontend *new_window(void)
GTK_SIGNAL_FUNC(menu_preset_event), fe);
gtk_widget_show(menuitem);
}
if (game_can_configure) {
menuitem = gtk_menu_item_new_with_label("Custom...");
gtk_container_add(GTK_CONTAINER(submenu), menuitem);
gtk_signal_connect(GTK_OBJECT(menuitem), "activate",
GTK_SIGNAL_FUNC(menu_config_event), fe);
gtk_widget_show(menuitem);
}
}
add_menu_separator(GTK_CONTAINER(menu));

24
midend.c
View File

@ -299,3 +299,27 @@ int midend_wants_statusbar(midend_data *me)
{
return game_wants_statusbar();
}
config_item *midend_get_config(midend_data *me)
{
return game_configure(me->params);
}
char *midend_set_config(midend_data *me, config_item *cfg)
{
char *error;
game_params *params;
params = custom_params(cfg);
error = validate_params(params);
if (error) {
free_params(params);
return error;
}
free_params(me->params);
me->params = params;
return NULL;
}

68
net.c
View File

@ -12,6 +12,7 @@
#include "tree234.h"
const char *const game_name = "Net";
const int game_can_configure = TRUE;
#define PI 3.141592653589793238462643383279502884197169399
@ -182,6 +183,73 @@ game_params *dup_params(game_params *params)
return ret;
}
config_item *game_configure(game_params *params)
{
config_item *ret;
char buf[80];
ret = snewn(5, config_item);
ret[0].name = "Width";
ret[0].type = STRING;
sprintf(buf, "%d", params->width);
ret[0].sval = dupstr(buf);
ret[0].ival = 0;
ret[1].name = "Height";
ret[1].type = STRING;
sprintf(buf, "%d", params->height);
ret[1].sval = dupstr(buf);
ret[1].ival = 0;
ret[2].name = "Walls wrap around";
ret[2].type = BOOLEAN;
ret[2].sval = NULL;
ret[2].ival = params->wrapping;
ret[3].name = "Barrier probability";
ret[3].type = STRING;
sprintf(buf, "%g", params->barrier_probability);
ret[3].sval = dupstr(buf);
ret[3].ival = 0;
ret[4].name = NULL;
ret[4].type = ENDCFG;
ret[4].sval = NULL;
ret[4].ival = 0;
return ret;
}
game_params *custom_params(config_item *cfg)
{
game_params *ret = snew(game_params);
ret->width = atoi(cfg[0].sval);
ret->height = atoi(cfg[1].sval);
ret->wrapping = cfg[2].ival;
ret->barrier_probability = atof(cfg[3].sval);
return ret;
}
char *validate_params(game_params *params)
{
if (params->width <= 0 && params->height <= 0)
return "Width and height must both be greater than zero";
if (params->width <= 0)
return "Width must be greater than zero";
if (params->height <= 0)
return "Height must be greater than zero";
if (params->width <= 1 && params->height <= 1)
return "At least one of width and height must be greater than one";
if (params->barrier_probability < 0)
return "Barrier probability may not be negative";
if (params->barrier_probability > 1)
return "Barrier probability may not be greater than 1";
return NULL;
}
/* ----------------------------------------------------------------------
* Randomly select a new game seed.
*/

16
nullgame.c
View File

@ -20,6 +20,7 @@
#include "puzzles.h"
const char *const game_name = "Null Game";
const int game_can_configure = FALSE;
enum {
COL_BACKGROUND,
@ -60,6 +61,21 @@ game_params *dup_params(game_params *params)
return ret;
}
config_item *game_configure(game_params *params)
{
return NULL;
}
game_params *custom_params(config_item *cfg)
{
return NULL;
}
char *validate_params(game_params *params)
{
return NULL;
}
char *new_game_seed(game_params *params)
{
return dupstr("FIXME");

39
puzzles.h
View File

@ -31,6 +31,7 @@ enum {
#define IGNOREARG(x) ( (x) = (x) )
typedef struct frontend frontend;
typedef struct config_item config_item;
typedef struct midend_data midend_data;
typedef struct random_state random_state;
typedef struct game_params game_params;
@ -47,6 +48,38 @@ typedef struct game_drawstate game_drawstate;
#define FONT_FIXED 0
#define FONT_VARIABLE 1
/*
* Structure used to pass configuration data between frontend and
* game
*/
enum { STRING, CHOICES, BOOLEAN, ENDCFG };
struct config_item {
/*
* `name' is never dynamically allocated.
*/
char *name;
/*
* `type' contains one of the above values.
*/
int type;
/*
* For STRING, `sval' is always dynamically allocated and
* non-NULL. For BOOLEAN and ENDCFG, `sval' is always NULL. For
* CHOICES, `sval' is non-NULL, _not_ dynamically allocated,
* and contains a set of option strings separated by a
* delimiter. The delimeter is also the first character in the
* string, so for example ":Foo:Bar:Baz" gives three options
* `Foo', `Bar' and `Baz'.
*/
char *sval;
/*
* For BOOLEAN, this is TRUE or FALSE. For CHOICES, it
* indicates the chosen index from the `sval' list. In the
* above example, 0==Foo, 1==Bar and 2==Baz.
*/
int ival;
};
/*
* Platform routines
*/
@ -84,6 +117,8 @@ int midend_num_presets(midend_data *me);
void midend_fetch_preset(midend_data *me, int n,
char **name, game_params **params);
int midend_wants_statusbar(midend_data *me);
config_item *midend_get_config(midend_data *me);
char *midend_set_config(midend_data *me, config_item *cfg);
/*
* malloc.c
@ -115,10 +150,14 @@ void random_free(random_state *state);
* Game-specific routines
*/
extern const char *const game_name;
const int game_can_configure;
game_params *default_params(void);
int game_fetch_preset(int i, char **name, game_params **params);
void free_params(game_params *params);
game_params *dup_params(game_params *params);
config_item *game_configure(game_params *params);
game_params *custom_params(config_item *cfg);
char *validate_params(game_params *params);
char *new_game_seed(game_params *params);
game_state *new_game(game_params *params, char *seed);
game_state *dup_game(game_state *state);

57
sixteen.c
View File

@ -13,6 +13,7 @@
#include "puzzles.h"
const char *const game_name = "Sixteen";
const int game_can_configure = TRUE;
#define TILE_SIZE 48
#define BORDER TILE_SIZE /* big border to fill with arrows */
@ -44,6 +45,7 @@ struct game_state {
int *tiles;
int completed;
int movecount;
int last_movement_sense;
};
game_params *default_params(void)
@ -90,6 +92,51 @@ game_params *dup_params(game_params *params)
return ret;
}
config_item *game_configure(game_params *params)
{
config_item *ret;
char buf[80];
ret = snewn(3, config_item);
ret[0].name = "Width";
ret[0].type = STRING;
sprintf(buf, "%d", params->w);
ret[0].sval = dupstr(buf);
ret[0].ival = 0;
ret[1].name = "Height";
ret[1].type = STRING;
sprintf(buf, "%d", params->h);
ret[1].sval = dupstr(buf);
ret[1].ival = 0;
ret[2].name = NULL;
ret[2].type = ENDCFG;
ret[2].sval = NULL;
ret[2].ival = 0;
return ret;
}
game_params *custom_params(config_item *cfg)
{
game_params *ret = snew(game_params);
ret->w = atoi(cfg[0].sval);
ret->h = atoi(cfg[1].sval);
return ret;
}
char *validate_params(game_params *params)
{
if (params->w < 2 && params->h < 2)
return "Width and height must both be at least two";
return NULL;
}
int perm_parity(int *perm, int n)
{
int i, j, ret;
@ -233,6 +280,7 @@ game_state *new_game(game_params *params, char *seed)
assert(!*p);
state->completed = state->movecount = 0;
state->last_movement_sense = 0;
return state;
}
@ -248,6 +296,7 @@ game_state *dup_game(game_state *state)
memcpy(ret->tiles, state->tiles, state->w * state->h * sizeof(int));
ret->completed = state->completed;
ret->movecount = state->movecount;
ret->last_movement_sense = state->last_movement_sense;
return ret;
}
@ -291,6 +340,8 @@ game_state *make_move(game_state *from, int x, int y, int button)
ret->movecount++;
ret->last_movement_sense = -(dx+dy);
/*
* See if the game has been completed.
*/
@ -551,13 +602,15 @@ void game_redraw(frontend *fe, game_drawstate *ds, game_state *oldstate,
y0 = COORD(Y(state, j));
dx = (x1 - x0);
if (abs(dx) > TILE_SIZE) {
if (dx != 0 &&
dx != TILE_SIZE * state->last_movement_sense) {
dx = (dx < 0 ? dx + TILE_SIZE * state->w :
dx - TILE_SIZE * state->w);
assert(abs(dx) == TILE_SIZE);
}
dy = (y1 - y0);
if (abs(dy) > TILE_SIZE) {
if (dy != 0 &&
dy != TILE_SIZE * state->last_movement_sense) {
dy = (dy < 0 ? dy + TILE_SIZE * state->h :
dy - TILE_SIZE * state->h);
assert(abs(dy) == TILE_SIZE);