Game Development Reference
In-Depth Information
Engage thrusters
Ater adding the diver sprite to the stage, we can start scriping the player controls.
This is a fairly straighforward process, as follows:
1. Start with a
when <green lag> clicked
block.
2. Scale the sprite down with a
set size to ()%
block; enter the value
30
.
3. Then, reposiion it to the let of the screen using the
go to x: () y: ()
block;
enter the value
-190
and
0
respecively.
4. Add a
forever
loop.
5. Inside the loop, we will place the keyboard controls. There will be four similar
condiion checks. One for each of the arrow keys.
6. Combine an
if () then
block with
when <up arrow> key pressed?
.
7. Inside the
if ()
statement, place a
change y by ()
block; enter the value
4
.
8. Copy the construcion thrice.
9. Add them all together, then place them inside the
forever
loop.
10. Change the arrow butons checked in the copied
if ()
statements to account
for all the four possible direcions.
11. Change the direcion that the character will face to the corresponding direcion
when the appropriate buton is pressed. Replace the
change y by ()
blocks with
the
change x by ()
blocks where appropriate.
12. Change the values in the
change x by ()
and
change y by ()
blocks as shown in the
following screenshot:
