* Blog post: http://wakeupandcode.com/rollerball-unity-3d-tutorial * Rollerball 2 of 2, a Unity 5 tutorial based on Roll-a-ball tutorial from Unity Technologies.

1. Based on Roll-a-ball video tutorial from Unity Technologies
Part 2
@shahedC
WakeUpAndCode.com

3. In Hierarchy panel, click Create  Create Empty
Rename empty “GameObject” to “Borders”

4. With “Border” selected in Hierarchy…
… Reset to origin in Inspector panel.

5. In Hierarchy panel, click Create  3D Object  Cube

6. Rename Cube to “LeftBorder” in the Hierarchy Panel
With the cube selected in Hierarchy, mouse over the Scene, press F key to focus on it

7. Transform
• Position = -10, 0, 0
• Rotation = 0, 0, 0
• Scale = 0.5, 2, 20.5

8. With “LeftBorder” selected in Hierarchy, press Ctrl-D to duplicate it
Rename the duplicate to “RightBorder”

9. Transform
• Position = 10, 0, 0
• Rotation = 0, 0, 0
• Scale = 0.5, 2, 20.5

10. With “RightBorder” selected in Hierarchy, press Ctrl-D to duplicate it
Rename the duplicate to “FarBorder”

11. Transform
• Position = 0, 0, 10
• Rotation = 0, 0, 0
• Scale = 20.5, 2, 0.5

12. With “FarBorder” selected in Hierarchy, press Ctrl-D to duplicate it
Rename the duplicate to “NearBorder”

13. Transform
• Position = 0, 0, -10
• Rotation = 0, 0, 0
• Scale = 20.5, 2, 0.5

14. Click Play button, move around with arrow keys!

16. Click GameObject  3D Object  Cube
Hierarchy
panel:
 Create
 3D Object
 Cube
* OR *

17. Right-click Cube
in Hierarchy panel
Rename “Cube”
to “PowerUp”

18. Ensure PowerUp cube is at (0,0,0)
Mouse over Scene, then press “F” on keyboard to focus on selected PowerUp

19. Select Ball in Hierarchy, deselect active checkbox in Inspector panel
… the ball disappears from the Scene!

20. Position:
X = 0, 0.5, 0
Rotation = 45, 45, 45
Scale = 1, 1, 1
i.e. Lift up by 0.5, then rotate by (45, 45, 45)

21. In the Project panel,
click Create dropdown Then select “C# Script”, name it
ItemRotator
… with Scripts folder
selected

24. Verify Script in Inspector panel
Drag to
PowerUp

25. Click Play button, see the rotation?

26. In the Project panel,
click Create dropdown
Click “Folder”, then
Rename it “Prefabs"

27. Verify that
PowerUp
is blue
In Hierarchy
Drag to
Prefabs

28. In the Hierarchy panel,
click Create  Create Empty
Rename GameObject to PowerUps (plural)

29. With “PowerUps” selected in Hierarchy…
… Reset to origin in Inspector panel.

31. In the Scene panel, click the Y axis in the XYZ gizmo…
… top view!

32. Below the top menu, click the “Local” icon…
… it should switch to “Global”

33. Select the Move tool, then drag the PowerUp down to the Near Wall

34. Press Ctrl-D to duplicate PowerUp, drag it to a new position…
… repeat this 11 times to create 12 PowerUps

35. In the Project panel,
click Create dropdown…
Click “Material”, then
Rename it “PowerUpMaterial"
… with Materials
Folder selected

36. Make sure color is
different from ball
and ground colors

37. Drag to
Prefab
Verify Material

38. Drag
all 4
borders
into
“Borders”
Verify
Borders:
• NearBorder
• FarBorder
• RightBorder
• LeftBorder

40. Activate “Ball”
by enabling
its checkbox
in Inspector
panel

41. Click Play button, does the ball hit objects?

43. Add new method
OnTriggerEnter()
… just before class ends

44. Select
PowerUp
Prefab
in
Project
window
In Inspector
window,
click Tag
dropdown
then click
“Add Tag…”

45. Click + symbol
Rename New Tag
“PowerUp”

46. Select
PowerUp
Prefab
in
Project
window
In Inspector
window,
click Tag
dropdown
then select
“PowerUp” tag

47. Click Play button, ball still bounces back!

48. Select
PowerUp
Prefab
in
Project
window
Enable
“Is Trigger”
Checkbox

49. Click Play button, pick up PowerUps!

50. Select PowerUp
prefab in Project
Panel…
Then, Click Component  Physics  RigidBody

51. Select
PowerUp
Prefab
in
Project
window
Under RigidBody,
enable
“Is Kinematic”
checkbox

54. Define a private integer
named “count”
Increment count by 1
inside OnTriggerEnter()
when player collides
with PowerUp

55. In the Hierarchy panel, click Create  UI  Text

56. New Items in Hierarchy
• Canvas
• Text (child of Canvas)
• Event System

57. In Hierarchy panel, right-click “Text” (below Canvas), rename to “CountText”

58. Text: “count text”
Color: any light color

59. Under “Rect Transform”, click on the square icon to see all Anchor Presets

60. Hold down both Shift + Alt on keyboard
then click top-left square icon

61. Pos X = 10
Pos Y = -10

62. Top
Left!

64. First, add “using”
statement for
UnityEngine.UI
Add new public
variable for
countText object
In Start() method,
initialize count
and call
SetCountText()

65. Add new method
SetCountText()
just before class ends

66. Inside OnTriggerEnter()
call
SetCountText()
on PowerUp collision

67. Verify
CountText
… drag to
CountText
With
Ball
selected...

68. Click Play button, pick up PowerUps!
Count!

69. In the Hierarchy panel, click Create  UI  Text

70. In Hierarchy panel, right-click “Text” (below CountText), rename to “WinText”

71. Under “Rect Transform”, click on the square icon to see all Anchor Presets

72. Hold down both Shift + Alt on keyboard
then click middle-center square icon

73. Pos X = 0
Pos Y = 75

75. Add new public
variable for
winText object
In Start() method,
initialize
winText.Text

76. … then, update winText.text
If all 12 PowerUps are collected…

77. Verify WinText
… drag to
WinText
With
Ball
selected...

78. Click Play, collect all PowerUps!