Unity 2D video game development tutorial. Ninja Cat Flyer, derived from Kirill Muzykov’s Rocket Mouse Tutorial: http://www.raywenderlich.com/69392/make-game-like-jetpack-joyride-unity-2d-part-1

1. Derived from Kirill Muzykov’s Rocket Mouse Tutorial
http://www.raywenderlich.com/69392/make-game-like-jetpack-joyride-unity-2d-part-1
@shahedC
WakeUpAndCode.com

3. Drag “laser_on”
from “Sprites”
subfolder into
Scene

4. Rename
“laser_on”
to just “laser”

5. Set the laser’s Sorting Layer to “Objects”

6. For the laser object, click
Add Component  “Physics 2D”
Click “Box Collider 2D” Verify “Box Collider 2D”

7. Enable “Is Trigger” Checkbox
(This allows you to handle collisions
in your code instead of the Physics engine)
Update Size:
• X = 0.18
• Y = 3.1

8. For the laser object, click
Add Component  “New Script”
Enter “LaserScript”,
click “Create and Add”
Verify new script

9. Add these 6
instance
variables
inside
LaserScript
Add 1 line
in Start()
method

10. Add FixedUpdate()
method just before
the class ends

11. With “laser”
selected,
drag on/off
sprites
into script
properties

12. Position:
• X = 2
• Y = 0.25
• Z = 0
Laser Script
• Rotation Speed = 30

13. Drag “laser”
from Hierarchy
to Prefabs folder

14. Run
You should see a rotating laser!

17. Add 1
new
instance
variable

18. Add 2
new
methods
just before
Start()

19. Reassign
jetPackActive
boolean
Check if (!dead)
i.e. not dead

20. All your animation clips
will be created here

21. In the Animation tab, with Cat selected in Hierarchy…
Create New Clip, “die”
under Animations subfolder

22. Verify “die” animation in Animations subfolder

23. Ctrl-Select
“die0” and
“die1”, then
drag
animation
frames into
Animation
window

24. Change Sample Value to 8 for “die” animation

25. Click “Record” button to stop recording

26. In the Animation tab, with Cat selected in Hierarchy…
Create New Clip, “fall”
under Animations subfolder

27. Verify “fall” animation in Animations subfolder

28. Select
“fall”, then
drag
animation
frame (just
one) into
Animation
window

29. Click “Record” button to stop recording

31. In the
Animator tab
Click the +
next to
Parameters,
Then add a
new Bool

32. Name the new
parameter
“dead”

33. Right-click “Any State”, then click “Make Transition”

34. Click the “fall” state to complete the transition from “Any State” to “Fall”

35. Click the new Transition in the Animator tab,
Then, select “dead” under Conditions in Inspector

36. Set “dead” to true, then…
Click + to “Add to list”

37. Set “grounded “
to false
Select
“grounded”
for the
new condition…
NOTE: For this transition, “dead” is true, but “grounded” is false

38. Right-click “Any State”, then click “Make Transition”

39. Click the “die” state to complete the transition from “Any State” to “Die”

40. Click the new Transition in the Animator tab,
Then, select “dead” under Conditions in Inspector

41. Set “dead” to true, then…
Click + to “Add to list”

42. Set “grounded “
to true
Select
“grounded”
for the
new condition…
NOTE: For this transition, BOTH conditions are true! (“dead” AND “grounded”)

44. Add 1 line of code
inside HitByLaser()
NOTE: This ensures that “dead” condition is set to true when HitByLaser() is called

46. In the
Animator tab
Click the +
next to
Parameters,
Then add a
new Trigger

47. Name the new
Trigger parameter
“dieOnceTrigger”

48. Select the “die” animation
in the Project panel
Uncheck Loop Time

49. Run
What happens when the cat touches the laser?