static bool cohen_sutherland_clip(int* X1, int* Y1, int* X2, int* Y2)
{
int x1 = *X1;
int y1 = *Y1;
int x2 = *X2;
int y2 = *Y2;
const int clipX1 = a__screen.clipX;
const int clipX2 = a__screen.clipX2;
const int clipY1 = a__screen.clipY;
const int clipY2 = a__screen.clipY2;
#define A__OUT_LEFT 1
#define A__OUT_RIGHT 2
#define A__OUT_TOP 4
#define A__OUT_DOWN 8
#define outcode(o, x, y) \
{ \
if(x < clipX1) o |= A__OUT_LEFT; \
else if(x >= clipX2) o |= A__OUT_RIGHT; \
\
if(y < clipY1) o |= A__OUT_TOP; \
else if(y >= clipY2) o |= A__OUT_DOWN; \
}
#define solvex() (x1 + (x1 - x2) * (y - y1) / (y1 - y2))
#define solvey() (y1 + (y1 - y2) * (x - x1) / (x1 - x2))
while(true) {
int outcode1 = 0;
int outcode2 = 0;
outcode(outcode1, x1, y1);
outcode(outcode2, x2, y2);
if((outcode1 | outcode2) == 0) {
*X1 = x1;
*Y1 = y1;
*X2 = x2;
*Y2 = y2;
return true;
} else if(outcode1 & outcode2) {
return false;
} else {
int x, y;
const int outcode = outcode1 ? outcode1 : outcode2;
if(outcode & A__OUT_LEFT) {
x = clipX1;
y = solvey();
} else if(outcode & A__OUT_RIGHT) {
x = clipX2 - 1;
y = solvey();
} else if(outcode & A__OUT_TOP) {
y = clipY1;
x = solvex();
} else { // outcode & A__OUT_DOWN
y = clipY2 - 1;
x = solvex();
}
if(outcode == outcode1) {
x1 = x;
y1 = y;
} else {
x2 = x;
y2 = y;
}
}
}
}
void menu_option(unsigned char number)
{
FILE *savefile;
FILE *optionfile;
char filename[12], savepos;
char oldinv; //holds options.inverted when entering setup
int move_count;
struct postype pos, newpos;
switch (number)
{
case 100: //avcount=avtotal/avcount;
if (g_path.move[0].f>0)
showstats(nodes,g_seconds,g_depth,g_path); break;
case 101: rival_help(70); break;
case 119: rival_help(19); break;
case 120: options.chessset++; if (options.chessset==3) options.chessset=0; break;
case 109: options.whiteplayer=USER;
options.blackplayer=USER;
if (game.movenum>1)
{
game.movenum=game.movenum-1;
pos=game.firstpos;
for (move_count=1; move_count<=game.movenum; move_count++)
{
alter(&pos,game.previous_moves[move_count],&newpos);
pos=newpos;
}
current=newpos;
} else
{
game.movenum=0;
current=game.firstpos;
}
movepointer=game.movenum;
no_more_openings=FALSE;
break;
case 110: if (game.lastmove==0)
{
current=game.firstpos;
} else
{
pos=game.firstpos;
for (move_count=1; move_count<=game.lastmove; move_count++)
{
alter(&pos, game.previous_moves[move_count], &newpos);
pos=newpos;
}
current=newpos;
}
game.movenum=game.lastmove;
movepointer=game.movenum;
break;
case 111: current=game.firstpos; game.movenum=0;
movepointer=game.movenum;
no_more_openings=FALSE;
options.whiteplayer=USER;
options.blackplayer=USER;
break;
case 112: if ((savepos=get_savepos('w'))!=0)
{
strcpy(filename,"RIVAL\0");
if (savepos<10)
{
filename[5]=savepos+48;
filename[6]='\0';
} else
{
filename[5]=savepos/10+48;
filename[6]=savepos%10+48;
filename[7]='\0';
}
strcat(filename,".SAV");
if (confirmation("SAVE GAME"))
{
savefile=fopen(filename,"w");
if (savefile!=NULL)
{
savefiledata(savefile);
} else // if savefile!=NULL
{
printf("ERROR! SAVE FAILED");
}
fclose(savefile);
} // if confirmation
}
break;
case 113: if ((savepos=get_savepos('r'))!=0)
{
strcpy(filename,"RIVAL\0");
if (savepos<10)
{
filename[5]=savepos+48;
filename[6]='\0';
} else
{
filename[5]=savepos/10+48;
filename[6]=savepos%10+48;
filename[7]='\0';
}
strcat(filename, ".SAV");
if (((savefile=fopen(filename,"r"))!=NULL) && (confirmation("LOAD GAME")))
{
readfiledata(savefile);
if (game.movenum==0)
{
current=game.firstpos;
movepointer=0;
} else
{
pos=game.firstpos;
for (move_count=1; move_count<=game.movenum; move_count++)
{
alter(&pos, game.previous_moves[move_count], &newpos);
pos=newpos;
}
current=newpos;
}
FLAGnewstart=1;
movepointer=game.movenum;
} //movepointer=game.movenum;
fclose(savefile);
}
break;
case 107: variant_select(); break;
case 106: time_select(); break;
case 127: options.deep_thought=!options.deep_thought; break;
case 133: break;
case 118: options.library=!options.library; break;
case 108: if (game.movenum<game.lastmove)
{
game.movenum=game.movenum+1;
pos=current;
alter(&pos,game.previous_moves[game.movenum],¤t);
}
movepointer=game.movenum;
break;
case 103: oldinv=options.inverted;
options.inverted=0;
enter_setup();
options.inverted=oldinv;
break;
case 117: options.analysis=!options.analysis; break;
case 102: options.inverted=!options.inverted; break;
case 104: options.whiteplayer=!options.whiteplayer;
if (options.whiteplayer==PROGRAM)
if (current.mvr=='w')
FLAGnewstart=1;
break;
case 105: options.blackplayer=!options.blackplayer;
if (options.blackplayer==PROGRAM)
if (current.mvr=='b')
FLAGnewstart=1;
break;
case 114: if (confirmation("NEW GAME")) initialise(startbrd); no_more_openings=FALSE; break;
case 115: iconmenu=1; break;
case 116: iconmenu=0; break;
case 129: switch (options.sensitivity)
{
case LOWSENS : options.sensitivity=MEDSENS; break;
case MEDSENS : options.sensitivity=HISENS; break;
case HISENS : options.sensitivity=LOWSENS; break;
}
break;
case 124: options=doptions; break;
case 125: optionfile=fopen("options.riv","w");
fwrite(&options, sizeof(struct optiontype), 1, optionfile);
fclose(optionfile);
break;
case 121: if (options.so<7) options.so+=1; else options.so=0; break;
case 122: if (options.wo<35) options.wo+=5; else options.wo=0;
if (options.wo==options.bo) if (options.wo<35) options.wo+=5; else options.wo=0;
break;
case 123: if (options.bo<35) options.bo+=5; else options.bo=0;
if (options.wo==options.bo) if (options.bo<35) options.bo+=5; else options.bo=0;
break;
case 128: solvey(); break;
case 130: break;
case 148: options.game=0; break;
case 126: options.pieceslide=!options.pieceslide; break;
case 131: if (confirmation("QUIT RIVAL"))
{
SetTextMode();
printf("See you later!");
quit=1;
}
break;
case 200: if (movepointer>0) movepointer--; break;
case 201: if (movepointer<game.movenum) movepointer++; break;
default: break;
}
}
