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

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+//======= Copyright (c) Valve Corporation, All rights reserved. ===============
+
+using UnityEngine;
+using System.Collections;
+
+namespace Valve.VR.InteractionSystem.Sample
+{
+    public class TargetHitEffect : MonoBehaviour
+    {
+        public Collider targetCollider;
+
+        public GameObject spawnObjectOnCollision;
+
+        public bool colorSpawnedObject = true;
+
+        public bool destroyOnTargetCollision = true;
+
+        private void OnCollisionEnter(Collision collision)
+        {
+            if (collision.collider == targetCollider)
+            {
+                ContactPoint contact = collision.contacts[0];
+                RaycastHit hit;
+
+                float backTrackLength = 1f;
+                Ray ray = new Ray(contact.point - (-contact.normal * backTrackLength), -contact.normal);
+                if (collision.collider.Raycast(ray, out hit, 2))
+                {
+                    if (colorSpawnedObject)
+                    {
+                        Renderer renderer = collision.gameObject.GetComponent<Renderer>();
+                        Texture2D tex = (Texture2D)renderer.material.mainTexture;
+                        Color color = tex.GetPixelBilinear(hit.textureCoord.x, hit.textureCoord.y);
+
+                        if (color.r > 0.7f && color.g > 0.7f && color.b < 0.7f)
+                            color = Color.yellow;
+                        else if (Mathf.Max(color.r, color.g, color.b) == color.r)
+                            color = Color.red;
+                        else if (Mathf.Max(color.r, color.g, color.b) == color.g)
+                            color = Color.green;
+                        else
+                            color = Color.yellow;
+
+                        color *= 15f;
+
+                        GameObject spawned = GameObject.Instantiate(spawnObjectOnCollision);
+                        spawned.transform.position = contact.point;
+                        spawned.transform.forward = ray.direction;
+
+                        Renderer[] spawnedRenderers = spawned.GetComponentsInChildren<Renderer>();
+                        for (int rendererIndex = 0; rendererIndex < spawnedRenderers.Length; rendererIndex++)
+                        {
+                            Renderer spawnedRenderer = spawnedRenderers[rendererIndex];
+                            spawnedRenderer.material.color = color;
+                            if (spawnedRenderer.material.HasProperty("_EmissionColor"))
+                            {
+                                spawnedRenderer.material.SetColor("_EmissionColor", color);
+                            }
+                        }
+                    }
+                }
+                Debug.DrawRay(ray.origin, ray.direction, Color.cyan, 5, true);
+
+                if (destroyOnTargetCollision)
+                    Destroy(this.gameObject);
+            }
+        }
+    }
+}