nethack-3.4.3/src/vision.c

504     int dx, dy;		/* one step from a lit door or lit wall (see below) */
737 		    dx = u.ux - col;	dx = sign(dx);
738 		    flev = &(levl[col+dx][row+dy]);
739 		    if (flev->lit || next_array[row+dy][col+dx] & TEMP_LIT) {
1131     int dx, dy;						\
1135     dx = (x2) - x;	dy = y - (y2);			\
1139     dxs = dx << 1;	   /* save the shifted values */\
1141     if (dy > dx) {					\
1154 	err = dys - dx;					\
1156 	for (k = dx-1; k; k--) {			\
1175     int dx, dy;						\
1179     dx = (x2) - x;	dy = (y2) - y;			\
1183     dxs = dx << 1;	   /* save the shifted values */\
1185     if (dy > dx) {					\
1199 	err = dys - dx;					\
1201 	for (k = dx-1; k; k--) {			\
1220     int dx, dy;						\
1224     dx = x - (x2);	dy = y - (y2);			\
1228     dxs = dx << 1;	   /* save the shifted values */\
1230     if (dy > dx) {					\
1243 	err = dys - dx;					\
1245 	for (k = dx-1; k; k--) {			\
1264     int dx, dy;						\
1268     dx = x - (x2);	dy = (y2) - y;			\
1272     dxs = dx << 1;	   /* save the shifted values */\
1274     if (dy > dx) {					\
1288 	err = dys - dx;					\
1290 	for (k = dx-1; k; k--) {			\
1323     int dx, dy;
1327     dx = x2 - x;	dy = y - y2;
1329     dxs = dx << 1;	   /* save the shifted values */
1331     if (dy > dx) {
1344 	err = dys - dx;
1346 	for (k = dx-1; k; k--) {
1367     int dx, dy;
1371     dx = x2 - x;	dy = y2 - y;
1373     dxs = dx << 1;	   /* save the shifted values */
1375     if (dy > dx) {
1388 	err = dys - dx;
1390 	for (k = dx-1; k; k--) {
1411     int dx, dy;
1415     dx = x - x2;	dy = y - y2;
1417     dxs = dx << 1;	   /* save the shifted values */
1419     if (dy > dx) {
1432 	err = dys - dx;
1434 	for (k = dx-1; k; k--) {
1455     int dx, dy;
1459     dx = x - x2;	dy = y2 - y;
1461     dxs = dx << 1;	   /* save the shifted values */
1463     if (dy > dx) {
1476 	err = dys - dx;
1478 	for (k = dx-1; k; k--) {
1594     if ((sdx = (start_col-block_col)) < 0) sdx = -sdx;		/* src   dx */
1629     if ((sdx = (start_col-block_col)) < 0) sdx = -sdx; --sdx;	/* src   dx */