////  lookAtExample.js//  examples////  Created by Brad Hefta-Gaub on 2/6/14.//  Copyright 2014 High Fidelity, Inc.////  This is an example script that demonstrates use of the Camera class's lookAt(), keepLookingAt(), and stopLookingAt()//  features.////  To use the script, click on a entity, and the camera will switch into independent mode and fix it's lookAt on the point//  on the face of the entity that you clicked. Click again and it will stop looking at that point. While in this fixed mode//  you can use the arrow keys to change the position of the camera.////  Distributed under the Apache License, Version 2.0.//  See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html// var lookingAtSomething = false;var oldMode = Camera.mode; function cancelLookAt() {    if (lookingAtSomething) {        lookingAtSomething = false;        Camera.stopLooking();        Camera.mode = oldMode;        releaseMovementKeys();    }} function captureMovementKeys() {    Controller.captureKeyEvents({ text: "up" }); // Z-    Controller.captureKeyEvents({ text: "down" }); // Z+    Controller.captureKeyEvents({ text: "UP" }); // Y+     Controller.captureKeyEvents({ text: "DOWN" }); // Y-    Controller.captureKeyEvents({ text: "left" }); // X+    Controller.captureKeyEvents({ text: "right" }); // X-} function releaseMovementKeys() {    Controller.releaseKeyEvents({ text: "up" }); // Z-    Controller.releaseKeyEvents({ text: "down" }); // Z+    Controller.releaseKeyEvents({ text: "UP" }); // Y+     Controller.releaseKeyEvents({ text: "DOWN" }); // Y-    Controller.releaseKeyEvents({ text: "left" }); // X+    Controller.releaseKeyEvents({ text: "right" }); // X-} var cameraPosition = Camera.getPosition();function moveCamera(update) {    if (lookingAtSomething) {        Camera.setPosition(cameraPosition);    }} Script.update.connect(moveCamera);  function mousePressEvent(event) {    if (lookingAtSomething) {        cancelLookAt();    } else {        var pickRay = Camera.computePickRay(event.x, event.y);        var intersection = Entities.findRayIntersection(pickRay);        if (intersection.intersects) {                    // remember the old mode we were in            oldMode = Camera.mode;             print("looking at intersection point: " + intersection.intersection.x + ", "                         + intersection.intersection.y + ", " + intersection.intersection.z);             // switch to independent mode            Camera.mode = "independent";             // tell the camera to fix it's look at on the point we clicked            Camera.keepLookingAt(intersection.intersection);             // keep track of the fact that we're in this looking at mode            lookingAtSomething = true;                        captureMovementKeys();            cameraPosition = Camera.getPosition();        }    }}Controller.mousePressEvent.connect(mousePressEvent); function keyPressEvent(event) {    if (lookingAtSomething) {         if (event.text == "ESC") {            cancelLookAt();        }         var MOVE_DELTA = 0.5;         if (event.text == "UP" && !event.isShifted) {            cameraPosition.z -= MOVE_DELTA;        }        if (event.text == "DOWN" && !event.isShifted) {            cameraPosition.z += MOVE_DELTA;        }        if (event.text == "LEFT" && !event.isShifted) {            cameraPosition.x += MOVE_DELTA;        }        if (event.text == "RIGHT" && !event.isShifted) {            cameraPosition.x -= MOVE_DELTA;        }        if (event.text == "UP" && event.isShifted) {            cameraPosition.y += MOVE_DELTA;        }        if (event.text == "DOWN" && event.isShifted) {            cameraPosition.y -= MOVE_DELTA;        }    }}Controller.keyPressEvent.connect(keyPressEvent); function scriptEnding() {    cancelLookAt();}Script.scriptEnding.connect(scriptEnding);