Sprites and Objects - Android Games Practical Programming by Example - page 56

case DIR_DOWN:
if (dir == DIR_UP) this .y -= MOVE_SPAN;
else this .y += MOVE_SPAN;
//Detects collision
if (gv.checkCollision()){
this .x = TILE_SIZE* this .col;
this .y = TILE_SIZE* this .row+TILE_SIZE-

SPRITE_HEIGHT;

ret = false ;

}
else {

this .row = ( this .y+SPRITE_HEIGHT-SPRITE_WIDTH/2)/

TILE_SIZE;

}
break ;

case DIR_LEFT:
case DIR_RIGHT:
if (dir == DIR_LEFT) this .x -= MOVE_SPAN;
else this .x += MOVE_SPAN;
//Detects collision
if (gv.checkCollision()){
this .x = TILE_SIZE* this .col;
this .y = TILE_SIZE* this .row+TILE_SIZE-

SPRITE_HEIGHT;

ret = false ;

}
else {

this .col = ( this .x+SPRITE_WIDTH/2)/TILE_SIZE;

}
break ;

default :

break ;

}

//Sets the current direction and animation segment.
this .direction = dir;