From 128a0c2397eeae266ce068023d1271f6c562e96f Mon Sep 17 00:00:00 2001
From: Thijs Wenker <me@thoys.nl>
Date: Wed, 4 Nov 2015 20:23:03 +0100
Subject: [PATCH] securityCamera.js - Camera Entity example

---
 examples/example/securityCamera.js | 55 ++++++++++++++++++++++++++++++
 1 file changed, 55 insertions(+)
 create mode 100644 examples/example/securityCamera.js

diff --git a/examples/example/securityCamera.js b/examples/example/securityCamera.js
new file mode 100644
index 0000000000..224eb9fac9
--- /dev/null
+++ b/examples/example/securityCamera.js
@@ -0,0 +1,55 @@
+//
+//  securityCamera.js
+//  examples/example
+//
+//  Created by Thijs Wenker on November 4, 2015
+//  Copyright 2015 High Fidelity, Inc.
+//
+//  Distributed under the Apache License, Version 2.0.
+//  See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html
+//
+
+const CAMERA_OFFSET = {x: 0, y: 4, z: -14};
+const LOOKAT_START_OFFSET = {x: -10, y: 0, z: 14};
+const LOOKAT_END_OFFSET = {x: 10, y: 0, z: 14};
+
+var lookatTargets = [Vec3.sum(MyAvatar.position, LOOKAT_START_OFFSET), Vec3.sum(MyAvatar.position, LOOKAT_END_OFFSET)];
+var currentTarget = 0;
+
+var forward = true;
+
+var oldCameraMode = Camera.mode;
+
+var cameraLookAt = function(cameraPos, lookAtPos) {
+    var lookAtRaw = Quat.lookAt(cameraPos, lookAtPos, Vec3.UP);
+    lookAtRaw.w = -lookAtRaw.w;
+    return lookAtRaw;
+};
+
+cameraEntity = Entities.addEntity({
+	type: "Camera",
+	position: Vec3.sum(MyAvatar.position, CAMERA_OFFSET)
+});
+
+Camera.mode = "camera entity";
+Camera.cameraEntity = cameraEntity;
+
+Script.update.connect(function(deltaTime) {
+    var cameraProperties = Entities.getEntityProperties(cameraEntity, ["position", "rotation"]);
+    var targetOrientation = cameraLookAt(cameraProperties.position, lookatTargets[currentTarget]);
+    if (Math.abs(targetOrientation.x - cameraProperties.rotation.x) < 0.01 && 
+        Math.abs(targetOrientation.y - cameraProperties.rotation.y) < 0.01 && 
+        Math.abs(targetOrientation.z - cameraProperties.rotation.z) < 0.01 && 
+        Math.abs(targetOrientation.w - cameraProperties.rotation.w) < 0.01
+          ) {
+        currentTarget = (currentTarget + 1) % lookatTargets.length;
+        return;
+    }
+    Entities.editEntity(cameraEntity, {rotation: Quat.mix(cameraProperties.rotation, targetOrientation, deltaTime / 3)});
+});
+
+Script.scriptEnding.connect(function() {
+    Entities.deleteEntity(cameraEntity);
+    Camera.mode = oldCameraMode;
+    Camera.cameraEntity = null;
+});