Game Development Reference
In-Depth Information
8.
Inside the
forever
block, add the
set x to curr_scroll_amount + ( my_grid_idx *
grid_length )
block.
9.
Under the
set x to curr_scroll_amount + ( my_grid_idx * grid_length )
block from step
6, add an
if (<abs> of x posiion) > () then
block; enter
350
. Then, enable the
hide else
show
block. The
<abs> of x posiion > ()
block is a mathemaical method that returns
the absolute value of its input. You can try to use numbers other than
350
, especially if
you wish to create new brick costumes. This value should be between
240
(half of the
stage or a grid) and
480
. If this value is set too high, you will find that the sprites are
"stuck" to the edge of the Stage and follow the player while scrolling. If this value is set
too small, then the sprites would disappear suddenly.
Perform the following steps to create code to scroll automaically:
1.
Start with a
when I receive <start_scrolling>
block.
2.
Inside the
when I receive <start_scrolling>
block, add a
forever
block.
3.
Enter
-1
in the
change <curr_scroll_amount> by (() * scroll_speed)
block, and
check whether the current scrolling amount is greater than the maximum scrolling
amount using the
if (<abs> of curr_scroll_amount > max_scroll_amount)
block.
When the maximum scrolling amount is reached, the player has reached the
edge of the grids. If so, then broadcast the
broadcast <scroll_max_reached>
block.
