Editing Gamebridge/Trigger Tutorial (section)

=== Code Hero 102: Coins ===

Once you've made your first level have obstacles to avoid falling forever, it's time to add some objectives for your players to seek out.


* Create a Coin.js script
* Create a World.js script
* Make Coin.js a trigger that sends an AddCoin message to World.js
* Make World.js increment a coin integer variable and display it OnGUI.
 
This is Unity 101 in 10 minutes and you are about to create your first video game!

 
# '''Download, install and open [[Unity]].'''
# '''Create your first project and your first playable game scene.'''
## Create a new project by clicking File Menu / New Project ''(You can play with Angry Bots later!)''
## Click the Character Controller checkbox to import it.'' (You can import more stuff later from Assets Menu / Import.)''
## In Hierarchy's top left corner click Create and click Cube. ''(You can also click Game Object menu/Create Other/Cube.)''
## Click the fourth tool in the top right or hit 'R'.
## '''Resize''' the cube wide and flat ( scale 50,1,50 ) as a ground by dragging the colored boxes on its sides.
## Click its name in the top right Inspfector. Name it "ground".
## Drag a character controller from the Project view to the Scene view or Hierarchy.
## Position it above your ground cube.
#
# '''Test It!'''
## Click '''PLAY''' button top center.
## Your game is now running! Walk around with WASD and look around with the mouse.
## '''Click PLAY''' button again to stop.
## Remember: NEVER edit the game while it is playing or you'll lose changes, always stop it first.
## '''Save''' your Scene which is like your first level of your game and name it "level1".
## You can make it awesome in the next steps!
#
# '''Decorate your scene!'''
## Add point lights to make it look cool and more cubes to jump around on.
## Next we'll learn how to add a script to stop yourself from falling infinitely off the edge.
#
# '''Create a lava cube to avoid falling infinitely'''
## Select the "ground" cube.
## Edit Menu / Duplicate it.
## Move the duplicate down.
## Rename the duplicate "lava".
## Resize it to make it wider (100,1,100 scale) so it will catch you if you fall.
## Hit '''PLAY''' and try falling off the edge. Notice it catches you but you can walk further and fall off the edge still.
## Hit '''PLAY''' again to stop it.
## Click the "lava" cube to select it.
## In the Inspector, look for the Collider component.
## Check the "Is Trigger" checkbox.
## Hit '''PLAY''' and try falling off the edge. Notice it you now fall right through the lava cube without stopping.
## Hit '''PLAY''' again to stop the game.
#
# '''Create your first script code to avoid falling infinitely'''
## In the Project pane, click Create / Javascript.
## Rename the javascript "Teleport". Click it once to make the name changeable.
## Drag the Teleport script to the "lava" cube in the Scene, the Hierarchy or the bottom of its Inspector to attach it.
## Look in the inspector to confirm it is attached to the "lava" cube.
#
# '''Edit the script to handle an OnTriggerEnter event:'''
## Double-click the "Teleport" javascript to edit it.
## Wait for MonoDevelop to load up.
## Double-click the "Teleport" javascript again if it is not already open to edit it.
## Select all the "function Update" text and erase everything.
## Type just "trigger". We are going to find out how triggers work by searching the API Reference.
## Make sure the cursor is on "trigger" or select the whole word.
## Click the Help Menu and choose Unity API Reference to look it up.
## You can do this faster by pressing Command-' (Mac) or Control-' (Windows).
## Look at the results that come up for something that looks related to triggering an event when a collider is touched.
## Click Result 2: OnTriggerEnter.
## Select and copy the example code.
## Switch back to MonoDevelop.
## Erase the word trigger.
## Paste the example code into Teleport.js.
## Delete the whole "Destroy" line.
## Your code should look like this now: function OnTriggerEnter( other : Collider ) {<br> <br>
}
#
# '''Change the Destroy line to reload the current level instead.'''
## Select and delete the GameObject.Destroy line.
## Since we want to reload the same level, type "loadlevel" Your code should look like this:<br>
<br>
function OnTriggerEnter( other : Collider ) {<br> loadlevel<br>
}<br>
## Click "loadlevel" and click Help Menu / Unity API Reference to look it up.
## The first result is the one we want! Click Application.LoadLevel
## Copy the example code.
## Switch to MonoDevelop.
## Paste the example code on a blank line between the "function OnTriggerEnter {" and "}".<br>
Your code should look like this:<br>
<br>
function OnTriggerEnter( other : Collider ) {<br> Application.LoadLevel("Highscore"); <br>
}<br>
## Change Application.LoadLevel("Highscore"); to "Application.LoadLevel("level1");"<br>
Your code should look like this:<br>
<br>
function OnTriggerEnter( other : Collider ) {<br> Application.LoadLevel("level1"); <br>
}<br>
## Save your code.
## Switch to Unity.
## Save your scene and name the scene file "level1".
## If you get an error about Build Settings, make sure to add it by going to File/Build Settings/Add Current.
## Hit PLAY to test it.
## When you jump off the edge and hit the lava, do you get teleported back to the top?
## If so, you are now a game developer, congratulations!
#