Distance to Player

Unity Engine
1

Hi,

we created a multiplayer with Unity networking.
I have implemented a function that checks if the player´s mouse is over a door. A GUI-Text appears if the mouse is over (“Press ‘E’ to open the door”). But how can I check the distance between player and door? I know there are different ways. But my problem is to detect the player that actually is looking at the door. U Know what I mean? I hope so :confused:

So the question is simple I hope:

How can i detect the player that is looking at the door to check the distance between this player and the door.

thanks!
MysteriX

2

Look up the Ray, Physics.Raycast and Physics.RaycastAll in the Unity3D documentation.

3

One option: Use InverseTransformPoint to figure out both:

Vector3 doorsLocalPosition = playerTransform.InverseTransformPoint(doorTransform.position);
float angle = Vector3.Angle ( doorsLocalPosition, Vector3.forward );
float distance = doorsLocalPosition.magnitude
if (angle < 45f  distance < 10f ) { }//do stuff
4

In a game of mine, I have a “LookAtController”, maybe that one can help you. It’s far from perfect, but at the time being it’s doing its purpose.

public class ObjectBeingLookedAt {

	private float lookDistance = 1.75f;
	private float lookRadius   = 0.35f;
	
	public Transform transform;
	
	public ObjectBeingLookedAt ( Camera cam ) {
		Ray          lookingRay  = new Ray (cam.transform.position, cam.transform.forward);
		RaycastHit[] raycastHits = Physics.SphereCastAll( lookingRay, lookRadius, lookDistance );
		Physics.Ray

		if ( raycastHits.Length > 0 ) {
			RaycastHit closestRaycastHit = raycastHits[0];
			
			foreach ( RaycastHit raycastHit in raycastHits ) {
				if ( raycastHit.distance < closestRaycastHit.distance ) {
					closestRaycastHit = raycastHit;
				}
			}
			
			transform = closestRaycastHit.transform;
		}
	}
	
}