Recap: Key and Door
Part of the Physics and Gameplay section of Coddy's Unity journey. Lesson 20 of 63.
Challenge
EasyA locked gate stands in the wall, and a key lies on the floor. Player.cs moves the player with the arrows and has a hasKey field. The Key and the Doorway in front of the gate are triggers. Write their scripts:
Key: when the player touches it, set the player'shasKeytotrue, logGot the keyand remove the key. Nothing else can take it: a ball rolling over it leaves it where it is.Door: when the player walks into the doorway with the key, hidegateand logThe door opens. Without the key, logLockedand leave the gate shut.
Press Play, try the door, fetch the key and try again, then Check.
Try it yourself
using UnityEngine;
public class Key : MonoBehaviour
{
// The player takes the key; nothing else does
}
All lessons in Physics and Gameplay
1Rigidbody
Gravity and MassPush with AddForceJump with an ImpulseFixedUpdate for PhysicsVelocityKinematic BodiesRecap: Launch Pad
2Collisions
OnCollisionEnterWhat Did I Hit?Break on ImpactStanding on the GroundBounce and FrictionCollider ShapesRecap: Breakable Wall