Krool’s Forces: Sweetening the Challenge - The Game Maker's Companion: Game Development - page 118

6. Follow this with a Set Variable action that sets the Variable facing to -facing .
7. Include a Check Object action that checks if there would NOT be a collision with an
instance of obj_platform at a Relative position of X = 0 , Y = 1 .
8. Follow this with an Execute Script action that sets Script to move_to_contact_with ,
Argument0 to 270 , Argument1 to -1 , and Argument2 to obj_platform . This will move
the Jelly down when descending slopes.
9. Include a Change Sprite action ( main1 tab) that sets the Sprite to spr_jelly ,
Subimage to -1 (unchanged), and Speed to 0.2 . This provides a default state for the
sprite and reduces the animation speed to a fifth because the wobble animation only
has two frames and was running much too fast.
10. Include a Check Object action ( control tab) that checks if there would be a collision
with an instance of obj_ramp_up at a Relative position of X = 0 , Y = 1 (that is, directly
underneath the Jelly).
11. Follow this with a Change Sprite action ( main1 tab) that sets the Sprite to
spr_jelly_up , the Subimage to -1 , and the Speed to 0.2 again.
12. Include another Check Object action ( control tab) that checks if there would be a
collision with an instance of obj_ramp_down at a Relative position of X = 0 , Y = 1 .
13. Follow this with a Change Sprite action ( main1 tab) that sets the Sprite to
spr_jelly_down , the Subimage to -1 , and the Speed to 0.2 . The Step event for
obj_jelly should now contain 14 actions, as shown in Figure 5-5.
Figure 5-5. The Step event of obj_jelly