Graphics Reference
In-Depth Information
To access the user's car controller script quickly, the game controller stores a reference
to it in the variable focusPlayerScript, so named because it is the player on which the game
controller will focus:
focusPlayerScript = ( CarController_MVD )
playerGO1.GetComponent<CarController_MVD>();
The user's player script is given an ID number of 0, and user input is allowed with a
call to SetUserInput():
// assign this player the id of 0
focusPlayerScript.SetID( 0 );
// set player control
focusPlayerScript.SetUserInput( true );
For the camera to follow the player during the game, the camera control script needs
to know about its target. This script uses the SetTarget() function to do that, passing in the
transform from playerGO1:
// tell the camera script to target this new player
cameraScript.SetTarget( playerGO1.transform );
UpdateLapCounter is used to set the current lap to be displayed by the UI code. Its
default value of 1 gets set here so that the display is correct when the game starts:
// do initial lap counter display
UpdateLapCounter( 1 );
Players need to be held in place until the 3-2-1 countdown at the start of the race has
finished. The function SetPlayerLocks will loop through all of the players in the game and
tell them whether or not they should be locked in place:
// lock all the players on the spot until we're ready to go
SetPlayerLocks( true );
The 3-2-1 countdown is about to begin. It will take 4 s to go through it so the game
controller schedules a call to StartRace in 4 s time using the Invoke function:
// start the game in 3 seconds from now
Invoke( "StartRace", 4 );
There is no need for the user interface to update every frame or every step. It would be
an unnecessary load on the CPU to update positions like that, so instead, the game controller
schedules a repeating call to the UpdatePositions() every half second. The InvokeRepeating
function takes three parameters: the name of the function to call, the time from the call to
the first function call, and the time between each function call after that and ongoing until
either this script instance is destroyed or CancelInvoke is called to stop the continuing calls:
// update positions throughout the race, but we don't need
// to do this every frame, so just do it every half a second
// instead
InvokeRepeating( "UpdatePositions", 0.5f, 0.5f );
