Trying to make an area trigger that doesn't just trigger on the mesh borders.

Unity Engine
1

I have this tram loaded with a collision mesh that fits the inside. The collision mesh has a script that checks for player collision with OnTriggerEnter, and then sets the variable tramMove to true. This variable is taken in another piece of script attached to the parent tram itself, moving it forward. The result I was going for here is that when the player steps aboard the tram, it moves.

In an effort to make it so that when the player is not aboard the tram, it stops, I’ve also added an OnTriggerExit component, which sets the tramMove variable to false again.

The problem I’m getting now seems to be that the player now needs to stand on the border of the trigger mesh to activate the tramMove variable, i.e with their foot in the door. The moment they step inside the tram, away from any mesh faces, tramMove is set to false again, as the stepping away from the mesh exterior is taken by Unity as an OnTriggerExit.

I need the script to work consistently, so that it depends on the player’s being inside the mesh altogether, rather than just touching its bounding faces. I’ve tried, for example, checking if the amount of times the player has exited the mesh is an even number, but this can be broken by stepping in and out of the tram door whilst still remaining on the tram. So I’m stuck.

(Tram trigger script)

static var tramMove : boolean = false;
var exitCounter : int = 0;

function OnTriggerEnter(trigger : Collider)
{
	if(trigger.gameObject.name == "Player")	// If the player activates the trigger.
	{
		tramMove = true;
	}
}

(Tram move script)

var speed : float = 0.1;

function Update ()
{

	if(TramMove.tramMove == true)
	{
		transform.Translate(Vector3(speed, 0, 0));
	}

}
2

What type of collider have you used? If you’re using a mesh collider then I suggest you to use a box collider with the same size as your tram. About managing the tram movement, I probably would use trigger stay instead of trigger enter and would wait for the tram collider to contains the player’s transform position (which hopefully should be the center of its gameObject), and may be disable the player movement for few seconds to deny move/stop too quickly.

3

Thanks, I’ll do that. Are do box colliders check for collisions all the way through, then?