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Assets/SteamVR/InteractionSystem/Samples/Scripts/TargetMeasurement.cs

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+//======= Copyright (c) Valve Corporation, All rights reserved. ===============
+
+#if UNITY_UGUI_UI || !UNITY_2019_2_OR_NEWER
+using UnityEngine;
+using System.Collections;
+using UnityEngine.UI;
+
+namespace Valve.VR.InteractionSystem.Sample
+{
+    public class TargetMeasurement : MonoBehaviour
+    {
+        public GameObject visualWrapper;
+        public Transform measurementTape;
+
+        public Transform endPoint;
+        public Text measurementTextM;
+        public Text measurementTextFT;
+
+        public float maxDistanceToDraw = 6f;
+
+        public bool drawTape = false;
+
+        private float lastDistance;
+        private void Update()
+        {
+            if (Camera.main != null)
+            {
+                Vector3 fromPoint = Camera.main.transform.position;
+                fromPoint.y = endPoint.position.y;
+
+                float distance = Vector3.Distance(fromPoint, endPoint.position);
+
+                Vector3 center = Vector3.Lerp(fromPoint, endPoint.position, 0.5f);
+
+                this.transform.position = center;
+                this.transform.forward = endPoint.position - fromPoint;
+                measurementTape.localScale = new Vector3(0.05f, distance, 0.05f);
+
+                if (Mathf.Abs(distance - lastDistance) > 0.01f)
+                {
+                    measurementTextM.text = distance.ToString("00.0m");
+                    measurementTextFT.text = (distance * 3.28084).ToString("00.0ft");
+
+                    lastDistance = distance;
+                }
+
+                if (drawTape)
+                    visualWrapper.SetActive(distance < maxDistanceToDraw);
+                else
+                    visualWrapper.SetActive(false);
+            }
+        }
+    }
+}
+#else
+using UnityEngine;
+namespace Valve.VR.InteractionSystem.Sample { public class TargetMeasurement : MonoBehaviour { } }
+#endif