////  mouseLook.js//  examples////  Created by Sam Gondelman on 6/16/15//  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// var lastX = Reticle.getPosition().x;var lastY = Reticle.getPosition().y;var yawFromMouse = 0;var pitchFromMouse = 0; var yawSpeed = 0;var pitchSpeed = 0; var DEFAULT_PARAMETERS = {    MOUSE_YAW_SCALE: -0.125,    MOUSE_PITCH_SCALE: -0.125,    MOUSE_SENSITIVITY: 0.5,     // Damping frequency, adjust to change mouse look behavior    W: 10,} var movementParameters = DEFAULT_PARAMETERS; var mouseLook = (function () {     var BUTTON_WIDTH = 50,        BUTTON_HEIGHT = 50,        BUTTON_ALPHA = 0.9,        BUTTON_MARGIN = 8,        active = false,        keyboardID = 0;     function onKeyPressEvent(event) {        if (event.text == 'm') {            active = !active;            updateMapping();        }    }     function findInput(name) {        var availableInputs = Controller.getAvailableInputs(keyboardID);        for (i = 0; i < availableInputs.length; i++) {            if (availableInputs[i].inputName == name) {                return availableInputs[i].input;            }        }        // If the input isn't found, it will default to the first available input        return availableInputs[0].input;    }     function findAction(name) {        var actions = Controller.getAllActions();        for (var i = 0; i < actions.length; i++) {            if (actions[i].actionName == name) {                return i;            }        }        // If the action isn't found, it will default to the first available action        return 0;    }     function updateMapping() {        if (keyboardID != 0) {            if (active) {                // Turn mouselook on                yawFromMouse = 0;                pitchFromMouse = 0;                yawSpeed = 0;                pitchSpeed = 0;                 var a = findInput("A").channel;                var d = findInput("D").channel;                var left = findInput("Left").channel;                var right = findInput("Right").channel;                var shift = findInput("Shift").channel;                 for (var i = findAction("YAW_LEFT"); i <= findAction("YAW_RIGHT"); i++) {                    var inputChannels = Controller.getAllActions()[i].inputChannels;                    for (var j = 0; j < inputChannels.length; j++) {                        var inputChannel = inputChannels[j];                        // make a, d, left, and right strafe                        if ((inputChannel.input.channel == a || inputChannel.input.channel == left) && inputChannel.modifier.device == 0) {                            Controller.removeInputChannel(inputChannel);                            inputChannel.action = findAction("LATERAL_LEFT");                            Controller.addInputChannel(inputChannel);                        } else if ((inputChannel.input.channel == d || inputChannel.input.channel == right) && inputChannel.modifier.device == 0) {                            Controller.removeInputChannel(inputChannel);                            inputChannel.action = findAction("LATERAL_RIGHT");                            Controller.addInputChannel(inputChannel);                        }                    }                }                for (var i = findAction("LATERAL_LEFT"); i <= findAction("LATERAL_RIGHT"); i++) {                    var inputChannels = Controller.getAllActions()[i].inputChannels;                    for (var j = 0; j < inputChannels.length; j++) {                        var inputChannel = inputChannels[j];                        // make shift + a/d/left/right change yaw/pitch                        if ((inputChannel.input.channel == a || inputChannel.input.channel == left) && inputChannel.modifier.channel == shift) {                            Controller.removeInputChannel(inputChannel);                            inputChannel.action = findAction("YAW_LEFT");                            Controller.addInputChannel(inputChannel);                        } else if ((inputChannel.input.channel == d || inputChannel.input.channel == right) && inputChannel.modifier.channel == shift) {                            Controller.removeInputChannel(inputChannel);                            inputChannel.action = findAction("YAW_RIGHT");                            Controller.addInputChannel(inputChannel);                        }                    }                }            } else {                Controller.resetDevice(keyboardID);            }        }    }     function onScriptUpdate(dt) {        if (active && Window.hasFocus()) {            var x = Reticle.getPosition().x;            // I'm not sure why this + 0.5 is necessary?            var y = Reticle.getPosition().y; + 0.5;             yawFromMouse += ((x - lastX) * movementParameters.MOUSE_YAW_SCALE * movementParameters.MOUSE_SENSITIVITY);            pitchFromMouse += ((y - lastY) * movementParameters.MOUSE_PITCH_SCALE * movementParameters.MOUSE_SENSITIVITY);            pitchFromMouse = Math.max(-180, Math.min(180, pitchFromMouse));             resetCursorPosition();             // Here we use a linear damping model - http://en.wikipedia.org/wiki/Damping#Linear_damping            // Because we are using a critically damped model (no oscillation), ζ = 1 and            // so we derive the formula: acceleration = -(2 * w0 * v) - (w0^2 * x)            var W = movementParameters.W;            yawAccel = (W * W * yawFromMouse) - (2 * W * yawSpeed);            pitchAccel = (W * W * pitchFromMouse) - (2 * W * pitchSpeed);             yawSpeed += yawAccel * dt;            var yawMove = yawSpeed * dt;            var newOrientation = Quat.multiply(MyAvatar.orientation, Quat.fromVec3Degrees( { x: 0, y: yawMove, z: 0 } ));            MyAvatar.orientation = newOrientation;            yawFromMouse -= yawMove;             pitchSpeed += pitchAccel * dt;            var pitchMove = pitchSpeed * dt;            var newPitch = MyAvatar.headPitch + pitchMove;            MyAvatar.headPitch = newPitch;            pitchFromMouse -= pitchMove;        }    }     function resetCursorPosition() {        var newX = Window.x + Window.innerWidth / 2.0;        var newY = Window.y + Window.innerHeight / 2.0;        Reticle.setPosition({ x: newX, y: newY});        lastX = newX;        lastY = newY;    }     function setUp() {        keyboardID = Controller.findDevice("Keyboard");         Controller.keyPressEvent.connect(onKeyPressEvent);         Menu.menuItemEvent.connect(handleMenuEvent);         Script.update.connect(onScriptUpdate);    }     function setupMenu() {        Menu.addMenuItem({ menuName: "View", menuItemName: "Mouselook Mode", shortcutKey: "SHIFT+M",                         afterItem: "Mirror", isCheckable: true, isChecked: false });    }     setupMenu();     function cleanupMenu() {        Menu.removeMenuItem("View", "Mouselook Mode");    }     function handleMenuEvent(menuItem) {        if (menuItem == "Mouselook Mode") {            active = !active;            updateMapping();        }    }     function tearDown() {        if (keyboardID != 0) {               Controller.resetDevice(keyboardID);        }        cleanupMenu();    }     setUp();    Script.scriptEnding.connect(tearDown);}());