Game Development Reference
In-Depth Information
Figure 4-8.
The actions for the Keyboard, Down event of the Zool wall state object
14.
Next, add a
Key Press, Space
event to
obj_zool_wall
to allow Zool to release himself
from walls by jumping. Include a
Speed Horizontal
action (
move
tab) with
Horiz.
Speed
set to
-facing*2
. This applies a horizontal speed of 2 pixels per step in the
opposite direction to which Zool is facing.
15.
Include a
Speed Vertical
action with
Vert
.
Speed
set to
-15
. This will make Zool jump
upward as he leaps back from the wall.
16.
Include a
Change Instance
action (
main1
tab) that will change into
obj_zool_air
and
Perform Events
(
Destroy
and
Create
) as it does so.
17.
Now add a
Collision
event with
obj_solid
and include a
Set Variable
action (
control
tab) that sets the
Variable
x
to
xprevious
. This collision event will be similar to ones we
have used before, but not as complicated as the one for
obj_zool_land
.
18.
Include a second
Set Variable
action that sets the
Variable
y
to
yprevious
.
19.
Include a
Move to Contact
action (
move
tab) with
Direction
set to
direction
,
Maximum
set to
-1
, and
Against
set to
all objects
.
20.
Include a
Move Fixed
action with the middle
Directions
button
selected and
Speed
set
to
0
. This creates the simpler kind of collision event, which is fine for climbing.
21.
Include another
Set Variable
action (
control
tab) with
Variable
set to
state
and
Value
set to
ZSTATE_CLING
. This makes sure the climbing animation stops after a collision.
You should now have five actions for the
Collision
event, as shown in Figure 4-9.
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