RoomElement hitMonster(RoomElement element)
{
//erase the old monster image (using blank map tile)
TV.bitmap(element.x, element.y, map_bitmap);
TV.bitmap(element.x, element.y + 8, map_bitmap);
element.state = STATE_HIDDEN;
//add heart element
addRoomElement(ITEM_HEART, element.x, element.y, STATE_VISIBLE, COUNTER_START);
return element;
}
void drawLogo(char start)
{
//draw hearts
char x_offset = 48;
for (char i=start; i < (start+4); i++)
{
//draw logo element
TV.bitmap(x_offset, 16, logo_bitmap + (SIZEOF_LOGO_RECORD * i));
x_offset += 8;
}
}
void moveElf(unsigned char facing)
{
//erase the old elf image (using blank map tile)
TV.bitmap(elf.x, elf.y, map_bitmap);
TV.bitmap(elf.x, elf.y + 8, map_bitmap);
//if it is a new facing, then reset the step
if (facing != elf.facing)
{
elf.step = 1;
} else {
elf.step++;
if (elf.step > 2) elf.step = 1;
}
elf.facing = facing;
switch (facing)
{
case FACING_DOWN:
if (elf.y < 48)
{
if (checkMapRoomMove(elf.x, elf.y + 16) == 0)
if (checkMapRoomMove(elf.x+4, elf.y + 16) == 0) elf.y += STEP_LENGTH;
} else {
scrollMap(SCROLL_DOWN);
elf.x = 36;
elf.y = 8;
elf.facing = FACING_DOWN;
}
break;
case FACING_UP:
if (elf.y > 4)
{
if (checkMapRoomMove(elf.x, elf.y - 4) == 0)
if (checkMapRoomMove(elf.x + 4, elf.y - 4) == 0) elf.y -= STEP_LENGTH;
} else {
scrollMap(SCROLL_UP);
elf.x = 36;
elf.y = 32;
elf.facing = FACING_UP;
}
break;
case FACING_LEFT:
if (elf.x > 4)
{
if (checkMapRoomMove(elf.x - 4, elf.y) == 0)
if (checkMapRoomMove(elf.x - 4, elf.y + 12) == 0) elf.x -= STEP_LENGTH;
} else {
scrollMap(SCROLL_LEFT);
elf.x = 64;
elf.y = 24;
elf.facing = FACING_LEFT;
}
break;
case FACING_RIGHT:
if (elf.x < 80)
{
if (checkMapRoomMove(elf.x + 12, elf.y) == 0)
if (checkMapRoomMove(elf.x + 12, elf.y + 12) == 0) elf.x += STEP_LENGTH;
} else {
scrollMap(SCROLL_RIGHT);
elf.x = 16;
elf.y = 24;
elf.facing = FACING_RIGHT;
}
break;
}
//draw new elf bitmap
overlaybitmap(elf.x, elf.y, elf_bitmap + ( elf.facing * SIZEOF_ELF_RECORD));
overlaybitmap(elf.x, elf.y+8, elf_bitmap + ((elf.facing + elf.step) * SIZEOF_ELF_RECORD));
}
RoomElement moveMonster(RoomElement element)
{
//draw new monster bitmap
if (element.state > STATE_HIDDEN)
{
//erase the old monster image (using blank map tile)
TV.bitmap(element.x, element.y, map_bitmap);
TV.bitmap(element.x, element.y + 8, map_bitmap);
element.step++;
if (element.step > 2) element.step = 1;
switch (element.state)
{
case STATE_VISIBLE:
element.state = changeMonsterDirection();
break;
case STATE_MOVE_UP:
element.state = STATE_VISIBLE;
if (element.y > 4)
{
if (checkMapRoomMove(element.x, element.y - 4) == 0)
{
if (checkMapRoomMove(element.x + 4, element.y - 4) == 0)
{
element.y -= STEP_LENGTH;
element.state = STATE_MOVE_UP;
}
}
}
break;
case STATE_MOVE_DOWN:
element.state = STATE_VISIBLE;
if (element.y < 48)
{
if (checkMapRoomMove(element.x, element.y + 16) == 0)
{
if (checkMapRoomMove(element.x + 4, element.y + 16) == 0)
{
element.y += STEP_LENGTH;
element.state = STATE_MOVE_DOWN;
}
}
}
break;
case STATE_MOVE_LEFT:
element.state = STATE_VISIBLE;
if (element.x > 4)
{
if (checkMapRoomMove(element.x - 4, element.y) == 0)
{
if (checkMapRoomMove(element.x - 4, element.y + 12) == 0)
{
element.x -= STEP_LENGTH;
element.state = STATE_MOVE_LEFT;
}
}
}
break;
case STATE_MOVE_RIGHT:
element.state = STATE_VISIBLE;
if (element.x < 80)
{
if (checkMapRoomMove(element.x + 12, element.y) == 0)
{
if (checkMapRoomMove(element.x + 12, element.y + 12) == 0)
{
element.x += STEP_LENGTH;
element.state = STATE_MOVE_RIGHT;
}
}
}
break;
}
overlaybitmap(element.x, element.y, monster_bitmap + ( element.type * SIZEOF_MONSTER_RECORD));
overlaybitmap(element.x, element.y+8, monster_bitmap + ((element.type + element.step) * SIZEOF_MONSTER_RECORD));
//decrement counter, if active
if (element.counter > 0) element.counter--;
}
return element;
}