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Assets/SteamVR/Extras/SteamVR_Teleporter.cs

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+using UnityEngine;
+using System.Collections;
+
+public class SteamVR_Teleporter : MonoBehaviour
+{
+	public enum TeleportType
+	{
+		TeleportTypeUseTerrain,
+		TeleportTypeUseCollider,
+		TeleportTypeUseZeroY
+	}
+
+	public bool teleportOnClick = false;
+	public TeleportType teleportType = TeleportType.TeleportTypeUseZeroY;
+
+	Transform reference
+	{
+		get
+		{
+			var top = SteamVR_Render.Top();
+			return (top != null) ? top.origin : null;
+		}
+	}
+
+	void Start()
+	{
+		var trackedController = GetComponent<SteamVR_TrackedController>();
+		if (trackedController == null)
+		{
+			trackedController = gameObject.AddComponent<SteamVR_TrackedController>();
+		}
+
+		trackedController.TriggerClicked += new ClickedEventHandler(DoClick);
+
+		if (teleportType == TeleportType.TeleportTypeUseTerrain)
+		{
+			// Start the player at the level of the terrain
+			var t = reference;
+			if (t != null)
+				t.position = new Vector3(t.position.x, Terrain.activeTerrain.SampleHeight(t.position), t.position.z);
+		}
+	}
+
+	void DoClick(object sender, ClickedEventArgs e)
+	{
+		if (teleportOnClick)
+		{
+			// First get the current Transform of the the reference space (i.e. the Play Area, e.g. CameraRig prefab)
+			var t = reference;
+			if (t == null)
+				return;
+
+			// Get the current Y position of the reference space
+			float refY = t.position.y;
+
+			// Create a plane at the Y position of the Play Area
+			// Then create a Ray from the origin of the controller in the direction that the controller is pointing
+			Plane plane = new Plane(Vector3.up, -refY);
+			Ray ray = new Ray(this.transform.position, transform.forward);
+
+			// Set defaults
+			bool hasGroundTarget = false;
+			float dist = 0f;
+			if (teleportType == TeleportType.TeleportTypeUseTerrain) // If we picked to use the terrain
+			{
+				RaycastHit hitInfo;
+				TerrainCollider tc = Terrain.activeTerrain.GetComponent<TerrainCollider>();
+				hasGroundTarget = tc.Raycast(ray, out hitInfo, 1000f);
+				dist = hitInfo.distance;
+			}
+			else if (teleportType == TeleportType.TeleportTypeUseCollider) // If we picked to use the collider
+			{
+				RaycastHit hitInfo;
+				hasGroundTarget = Physics.Raycast(ray, out hitInfo);
+				dist = hitInfo.distance;
+			}
+			else // If we're just staying flat on the current Y axis
+			{
+				// Intersect a ray with the plane that was created earlier
+				// and output the distance along the ray that it intersects
+				hasGroundTarget = plane.Raycast(ray, out dist);
+			}
+
+			if (hasGroundTarget)
+			{
+				// Get the current Camera (head) position on the ground relative to the world
+				Vector3 headPosOnGround = new Vector3(SteamVR_Render.Top().head.position.x, refY, SteamVR_Render.Top().head.position.z);
+
+				// We need to translate the reference space along the same vector
+				// that is between the head's position on the ground and the intersection point on the ground
+				// i.e. intersectionPoint - headPosOnGround = translateVector
+				// currentReferencePosition + translateVector = finalPosition
+				t.position = t.position + (ray.origin + (ray.direction * dist)) - headPosOnGround;
+			}
+		}
+	}
+}
+