if(ke.key_id==DIKI_DOWN && *y!=d3_l->max_y-1) *y+=1;
if(ke.key_id==DIKI_PAGE_UP && *z!=0) *z-=1;
if(ke.key_id==DIKI_PAGE_DOWN && *z!=d3_l->max_z-1) *z+=1;
if(ke.key_id==DIKI_DOWN && *y!=d3_l->max_y-1) *y+=1;
if(ke.key_id==DIKI_PAGE_UP && *z!=0) *z-=1;
if(ke.key_id==DIKI_PAGE_DOWN && *z!=d3_l->max_z-1) *z+=1;