overte-HifiExperiments/scripts/system/fingerPaint/fingerPaint.js

//
//  fingerPaint.js
//
//  Created by David Rowe on 15 Feb 2017
//  Copyright 2017 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
//
(function () {
    var tablet,
        button,
        BUTTON_NAME = "PAINT",
        //undo vars
        UNDO_STACK_SIZE = 5, 
        undoStack = [];
        isFingerPainting = false,
        isTabletFocused = false,
        tabletDebugFocusLine = null,
        //animated brush vars
        lastFrameTime = Date.now(),
        frameDeltaSeconds = null, //time that passed between frames in ms;
        //end of dynamic brush vars
        leftHand = null,
        rightHand = null,
        leftBrush = null,
        rightBrush = null,
        isBrushColored = false,
        isLeftHandDominant = false,
        isMouseDrawing = false,
        savedSettings = null,
        CONTROLLER_MAPPING_NAME = "com.highfidelity.fingerPaint",
        isTabletDisplayed = false,
        HIFI_POINT_INDEX_MESSAGE_CHANNEL = "Hifi-Point-Index",
        HIFI_GRAB_DISABLE_MESSAGE_CHANNEL = "Hifi-Grab-Disable",
        HIFI_POINTER_DISABLE_MESSAGE_CHANNEL = "Hifi-Pointer-Disable",
        SCRIPT_PATH = Script.resolvePath(''),
        CONTENT_PATH = SCRIPT_PATH.substr(0, SCRIPT_PATH.lastIndexOf('/')),
        ANIMATION_SCRIPT_PATH = Script.resolvePath("content/brushes/dynamicBrushes/dynamicBrushScript.js"),
        APP_URL = CONTENT_PATH + "/html/main.html";

    // Set up the qml ui
    //var qml = Script.resolvePath('PaintWindow.qml');
    Script.include("../libraries/controllers.js");
    Script.include("content/brushes/dynamicBrushes/dynamicBrushesList.js");
    //var window = null;

    //var inkSource = null;
    var inkSourceOverlay = null;
    // Set path for finger paint hand animations 
    var RIGHT_ANIM_URL = Script.resourcesPath() + 'avatar/animations/touch_point_closed_right.fbx';
    var LEFT_ANIM_URL = Script.resourcesPath() + 'avatar/animations/touch_point_closed_left.fbx';
    var RIGHT_ANIM_URL_OPEN = Script.resourcesPath() + 'avatar/animations/touch_point_open_right.fbx';
    var LEFT_ANIM_URL_OPEN = Script.resourcesPath() + 'avatar/animations/touch_point_open_left.fbx'; 

    function paintBrush(name) {
        // Paints in 3D.
        var brushName = name,
            STROKE_COLOR = savedSettings.currentColor,
            ERASE_SEARCH_RADIUS = 0.1,  // m
            STROKE_DIMENSIONS = { x: 10, y: 10, z: 10 },
            isDrawingLine = false,
            isTriggerPressureWidthEnabled = savedSettings.currentTriggerWidthEnabled,
            entityID,
            basePosition,
            strokePoints,
            strokeNormals,
            strokeWidths,
            timeOfLastPoint,
            texture = CONTENT_PATH + "/" + savedSettings.currentTexture.brushName,
            //'https://upload.wikimedia.org/wikipedia/commons/thumb/9/93/Caris_Tessellation.svg/1024px-Caris_Tessellation.svg.png', // Daantje
            strokeWidthMultiplier = savedSettings.currentStrokeWidth * 2 + 0.1,
            IS_UV_MODE_STRETCH = savedSettings.currentTexture.brushType == "stretch",
            MIN_STROKE_LENGTH = 0.005,  // m
            MIN_STROKE_INTERVAL = 66,  // ms
            MAX_POINTS_PER_LINE = 70;  // Hard-coded limit in PolyLineEntityItem.h.
                
        function strokeNormal() {
            return Vec3.multiplyQbyV(Camera.getOrientation(), Vec3.UNIT_NEG_Z);
        }
        
        function changeStrokeColor(red, green, blue) {
            STROKE_COLOR.red = red;
            STROKE_COLOR.green = green;
            STROKE_COLOR.blue = blue;
        }
        
        function getStrokeColor() {
            return STROKE_COLOR;
        }

        function isDrawing() {
            return isDrawingLine;
        }
        
        function changeStrokeWidthMultiplier(multiplier) {
           // MIN_STROKE_LENGTH = ((multiplier * MIN_STROKE_LENGTH) / 0.25)*0.5;
            //print("MIN_STROKE_LENGTH: " + MIN_STROKE_LENGTH);
            strokeWidthMultiplier = multiplier;
        }

        function setTriggerPressureWidthEnabled(isEnabled) {
            isTriggerPressureWidthEnabled = isEnabled;
        }
        
        function changeUVMode(isUVModeStretch) {
            IS_UV_MODE_STRETCH = isUVModeStretch;
        }
        
        function getStrokeWidth() {
            return strokeWidthMultiplier;
        }

        function getEntityID() {
            return entityID;
        }
                
        function changeTexture(textureURL) {
            texture = textureURL;
        }
        
        function undoErasing() {
            var undo = undoStack.pop();
            if (undo) {
                Entities.addEntity(undo);
            }
        }

        function calculateLineWidth(width) {
            if (isTriggerPressureWidthEnabled) {
                return width * strokeWidthMultiplier;    
            } else {
                return 0.03 * strokeWidthMultiplier; //MAX_LINE_WIDTH
            }
        }

        function startLine(position, width) {
            // Start drawing a polyline.
            if (isTabletFocused)
                return;

            width = calculateLineWidth(width);
            
            if (isDrawingLine) {
                print("ERROR: startLine() called when already drawing line");
                // Nevertheless, continue on and start a new line.
            }

            basePosition = position;

            strokePoints = [Vec3.ZERO];
            strokeNormals = [strokeNormal()];
            strokeWidths = [width];
            timeOfLastPoint = Date.now();

            entityID = Entities.addEntity({
                type: "PolyLine",
                name: "fingerPainting",
                shapeType: "box",
                color: STROKE_COLOR,
                position: position,
                linePoints: strokePoints,
                normals: strokeNormals,
                strokeWidths: strokeWidths,
                textures: texture, // Daantje
                isUVModeStretch: IS_UV_MODE_STRETCH,
                dimensions: STROKE_DIMENSIONS,
            });
            isDrawingLine = true;
            addAnimationToBrush(entityID);
        }

        function drawLine(position, width) {
            // Add a stroke to the polyline if stroke is a sufficient length.
            var localPosition,
                distanceToPrevious,
                MAX_DISTANCE_TO_PREVIOUS = 1.0;
            
            width = calculateLineWidth(width);
                
            if (!isDrawingLine) {
                print("ERROR: drawLine() called when not drawing line");
                return;
            }

            localPosition = Vec3.subtract(position, basePosition);
            distanceToPrevious = Vec3.distance(localPosition, strokePoints[strokePoints.length - 1]);

            if (distanceToPrevious > MAX_DISTANCE_TO_PREVIOUS) {
                // Ignore occasional spurious finger tip positions.
                return;
            }

            if (distanceToPrevious >= MIN_STROKE_LENGTH
                    && (Date.now() - timeOfLastPoint) >= MIN_STROKE_INTERVAL
                    && strokePoints.length < MAX_POINTS_PER_LINE) {
                strokePoints.push(localPosition);

                strokeNormals.push(strokeNormal());
                strokeWidths.push(width);
                timeOfLastPoint = Date.now();

                Entities.editEntity(entityID, {
                    color: STROKE_COLOR,
                    linePoints: strokePoints,
                    normals: strokeNormals,
                    strokeWidths: strokeWidths
                });
            }
        }

        function finishLine(position, width) {
            // Finish drawing polyline; delete if it has only 1 point.
            //stopDynamicBrush = true;
            //print("Before adding script: " + JSON.stringify(Entities.getEntityProperties(entityID)));
            var userData = Entities.getEntityProperties(entityID).userData;
            if (userData && JSON.parse(userData).animations) {
                Entities.editEntity(entityID, {
                    script: ANIMATION_SCRIPT_PATH,
                });    
            }
            //print("After adding script: " + JSON.stringify(Entities.getEntityProperties(entityID)));
            //setIsDrawingFingerPaint(entityID, false);
            //print("already stopped drawing");
            width = calculateLineWidth(width);
            
            if (!isDrawingLine) {
                print("ERROR: finishLine() called when not drawing line");
                return;
            }

            if (strokePoints.length === 1) {
                // Delete "empty" line.
                Entities.deleteEntity(entityID);
            }

            isDrawingLine = false;
            //print("After adding script 3: " + JSON.stringify(Entities.getEntityProperties(entityID)));
        }

        function cancelLine() {
            // Cancel any line being drawn.
            if (isDrawingLine) {
                Entities.deleteEntity(entityID);
                isDrawingLine = false;
            }
        }

        function eraseClosestLine(position) {
            // Erase closest line that is within search radius of finger tip.
            var entities,
                entitiesLength,
                properties,
                i,
                pointsLength,
                j,
                distance,
                found = false,
                foundID,
                foundDistance = ERASE_SEARCH_RADIUS;

            // Find entities with bounding box within search radius.
            entities = Entities.findEntities(position, ERASE_SEARCH_RADIUS);

            // Fine polyline entity with closest point within search radius.
            for (i = 0, entitiesLength = entities.length; i < entitiesLength; i += 1) {
                properties = Entities.getEntityProperties(entities[i], ["type", "position", "linePoints"]);
                if (properties.type === "PolyLine") {
                    basePosition = properties.position;
                    for (j = 0, pointsLength = properties.linePoints.length; j < pointsLength; j += 1) {
                        distance = Vec3.distance(position, Vec3.sum(basePosition, properties.linePoints[j]));
                        if (distance <= foundDistance) {
                            found = true;
                            foundID = entities[i];
                            foundDistance = distance;
                        }
                    }
                }
            }

            // Delete found entity.
            if (found) {
                addElementToUndoStack(Entities.getEntityProperties(foundID));
                Entities.deleteEntity(foundID);
                /*Entities.editEntity(entityID, {
                    color: «,
                    normals: strokeNormals,
                    strokeWidths: strokeWidths
                });*/
            }
        }

        function tearDown() {
            cancelLine();
        }

        return {
            startLine: startLine,
            drawLine: drawLine,
            finishLine: finishLine,
            cancelLine: cancelLine,
            eraseClosestLine: eraseClosestLine,
            tearDown: tearDown,
            changeStrokeColor: changeStrokeColor,
            changeStrokeWidthMultiplier: changeStrokeWidthMultiplier,
            changeTexture: changeTexture,
            isDrawing: isDrawing,
            undoErasing: undoErasing,
            getStrokeColor: getStrokeColor,
            getStrokeWidth: getStrokeWidth,
            getEntityID: getEntityID,
            changeUVMode: changeUVMode,
            setTriggerPressureWidthEnabled: setTriggerPressureWidthEnabled
        };
    }

    function handController(name) {
        // Translates controller data into application events.
        var handName = name,

            triggerPressedCallback,
            triggerPressingCallback,
            triggerReleasedCallback,
            gripPressedCallback,

            rawTriggerValue = 0.0,
            triggerValue = 0.0,
            isTriggerPressed = false,
            TRIGGER_SMOOTH_RATIO = 0.1,
            TRIGGER_OFF = 0.05,
            TRIGGER_ON = 0.1,
            TRIGGER_START_WIDTH_RAMP = 0.15,
            TRIGGER_FINISH_WIDTH_RAMP = 1.0,
            TRIGGER_RAMP_WIDTH = TRIGGER_FINISH_WIDTH_RAMP - TRIGGER_START_WIDTH_RAMP,
            MIN_LINE_WIDTH = 0.005,
            MAX_LINE_WIDTH = 0.03,
            RAMP_LINE_WIDTH = MAX_LINE_WIDTH - MIN_LINE_WIDTH,

            rawGripValue = 0.0,
            gripValue = 0.0,
            isGripPressed = false,
            GRIP_SMOOTH_RATIO = 0.1,
            GRIP_OFF = 0.05,
            GRIP_ON = 0.1;

        function onTriggerPress(value) {
            // Controller values are only updated when they change so store latest for use in update.
            rawTriggerValue = value;
        }

        function updateTriggerPress(value) {
            
            var LASER_ALPHA = 0.5;
            var LASER_TRIGGER_COLOR_XYZW = {x: 250 / 255, y: 10 / 255, z: 10 / 255, w: LASER_ALPHA};
            var SYSTEM_LASER_DIRECTION = {x: 0, y: 0, z: -1};
            var LEFT_HUD_LASER = 1;
            var RIGHT_HUD_LASER = 2;
            var BOTH_HUD_LASERS = LEFT_HUD_LASER + RIGHT_HUD_LASER;
            if (isLeftHandDominant){
                HMD.setHandLasers(RIGHT_HUD_LASER, true, LASER_TRIGGER_COLOR_XYZW, SYSTEM_LASER_DIRECTION);
                
                HMD.disableHandLasers(LEFT_HUD_LASER);
            }else{
                HMD.setHandLasers(LEFT_HUD_LASER, true, LASER_TRIGGER_COLOR_XYZW, SYSTEM_LASER_DIRECTION);
                HMD.disableHandLasers(RIGHT_HUD_LASER);
                
            }
            HMD.disableExtraLaser();
            
            
            var wasTriggerPressed,
                fingerTipPosition,
                lineWidth;

            triggerValue = triggerValue * TRIGGER_SMOOTH_RATIO + rawTriggerValue * (1.0 - TRIGGER_SMOOTH_RATIO);

            wasTriggerPressed = isTriggerPressed;
            if (isTriggerPressed) {
                isTriggerPressed = triggerValue > TRIGGER_OFF;
            } else {
                isTriggerPressed = triggerValue > TRIGGER_ON;
            }

            if (wasTriggerPressed || isTriggerPressed) {
                fingerTipPosition = MyAvatar.getJointPosition(handName === "left" ? "LeftHandIndex4" : "RightHandIndex4");
                
                opositeHandPosition = MyAvatar.getJointPosition(handName === "left" ? "RightHandMiddle1" : "LeftHandMiddle1");
                
                if (triggerValue < TRIGGER_START_WIDTH_RAMP) {
                    lineWidth = MIN_LINE_WIDTH;
                } else {
                    lineWidth = MIN_LINE_WIDTH
                        + (triggerValue - TRIGGER_START_WIDTH_RAMP) / TRIGGER_RAMP_WIDTH * RAMP_LINE_WIDTH;
                }
                
                if ((handName === "left" && isLeftHandDominant) || (handName === "right" && !isLeftHandDominant)){
                    if (!wasTriggerPressed && isTriggerPressed) {
                        
                        // TEST DAANTJE changes to a random color everytime you start a new line
                        //leftBrush.changeStrokeColor(Math.random()*255, Math.random()*255, Math.random()*255);
                        //rightBrush.changeStrokeColor(Math.random()*255, Math.random()*255, Math.random()*255);
                        // TEST Stroke line width
                        //var dim = Math.random()*4 + +0.5;
                        //var dim2 = Math.floor( Math.random()*40 + 5);
                        //leftBrush.changeStrokeWidthMultiplier(dim);
                        //rightBrush.changeStrokeWidthMultiplier(dim);
                        
                        triggerPressedCallback(fingerTipPosition, lineWidth);
                    } else if (wasTriggerPressed && isTriggerPressed) {
                        triggerPressingCallback(fingerTipPosition, lineWidth);
                    } else {
                        triggerReleasedCallback(fingerTipPosition, lineWidth);
                        
                        /* // define condition to switch dominant hands
                        if (Vec3.length(Vec3.subtract(fingerTipPosition, opositeHandPosition)) < 0.1){
                            isLeftHandDominant = !isLeftHandDominant;
                            
                            // Test DAANTJE changes texture
                            // if (Math.random() > 0.5) {
                                // leftBrush.changeTexture(null);
                                // rightBrush.changeTexture(null);
                            // }else {
                                // leftBrush.changeTexture('http://i.imgur.com/SSWDJtd.png');
                                // rightBrush.changeTexture('https://upload.wikimedia.org/wikipedia/commons/thumb/9/93/Caris_Tessellation.svg/1024px-Caris_Tessellation.svg.png');
                            // }
                            
                        } */
                        
                    }
                    
                }
                
            }
            
        }

        function onGripPress(value) {
            // Controller values are only updated when they change so store latest for use in update.
            rawGripValue = value;
        }

        function updateGripPress() {
            var fingerTipPosition;

            gripValue = gripValue * GRIP_SMOOTH_RATIO + rawGripValue * (1.0 - GRIP_SMOOTH_RATIO);

            if (isGripPressed) {
                isGripPressed = gripValue > GRIP_OFF;
            } else {
                isGripPressed = gripValue > GRIP_ON;
                if (isGripPressed) {
                    fingerTipPosition = MyAvatar.getJointPosition(handName === "left" ? "LeftHandIndex4" : "RightHandIndex4");
                    
                    if ((handName === "left" && isLeftHandDominant) || (handName === "right" && !isLeftHandDominant)){
                        gripPressedCallback(fingerTipPosition);
                    }
                }
            }
        }

        function checkTabletHasFocus() {
            var controllerPose = isLeftHandDominant 
                                    ? getControllerWorldLocation(Controller.Standard.LeftHand, true)
                                    : getControllerWorldLocation(Controller.Standard.RightHand, true);
            
            var fingerTipRotation = controllerPose.rotation;
            var fingerTipPosition = controllerPose.position;
            var pickRay = {
                origin: fingerTipPosition,
                direction: Quat.getUp(fingerTipRotation)
            }
            var overlays = Overlays.findRayIntersection(pickRay, false, [HMD.tabletID], [inkSourceOverlay.overlayID]);
            if (overlays.intersects && HMD.tabletID == overlays.overlayID) {
                if (!isTabletFocused) {
                    isTabletFocused = true;
                    //isFingerPainting = false;
                    Overlays.editOverlay(inkSourceOverlay, {visible: false});

                    updateHandAnimations();
                    pauseProcessing();
                    //print("Hovering tablet!");
                } 
            } else {
                if (isTabletFocused) {
                    //print("Unhovering tablet!");
                    isTabletFocused = false;
                    //isFingerPainting = true;
                    Overlays.editOverlay(inkSourceOverlay, {visible: true});
                    resumeProcessing();
                    updateHandFunctions();
                    //updateHandAnimations();
                    /*print("Current hand " + handName);
                    print("isFingerPainting " + isFingerPainting);
                    print("inkSourceOverlay " + JSON.stringify(inkSourceOverlay));
                    print("inkSourceOverlay " + JSON.stringify(inkSourceOverlay));*/
                }            
            };
        }

        function onUpdate() {
            
            //update ink Source
            // var strokeColor = leftBrush.getStrokeColor();
            // var strokeWidth = leftBrush.getStrokeWidth()*0.06;
            
            // var position = MyAvatar.getJointPosition(isLeftHandDominant ? "LeftHandIndex4" : "RightHandIndex4");
            // if (inkSource){
                
                
                // Entities.editEntity(inkSource, {
                    // color : strokeColor,
                    // position : position,
                    // dimensions : {
                        // x: strokeWidth, 
                        // y: strokeWidth, 
                        // z: strokeWidth} 
                
                // });
            // } else{
                // var inkSourceProps = {
                    // type: "Sphere",
                    // name: "inkSource",
                    // color: strokeColor,
                    // position: position,
                    // ignoreForCollisions: true,
                    
                    // dimensions: {x: strokeWidth, y:strokeWidth, z:strokeWidth}
                // }
                // inkSource = Entities.addEntity(inkSourceProps);
            // }

            /*frameDeltaSeconds = Date.now() - lastFrameTime;
            lastFrameTime = Date.now();
            var nearbyEntities = Entities.findEntities(MyAvatar.position, 5.0);
            for (var i = 0; i < nearbyEntities.length; i++) {
                //Entities.editEntity(nearbyEntities[i], {userData: ""}); //clear user data (good to use in case we need to clear it)

                var userData = Entities.getEntityProperties(nearbyEntities[i]).userData;
                if (userData != "") {
                    playAnimations(nearbyEntities[i], JSON.parse(userData).animations);
                }
            }*/
            /*if (Entities.getEntityProperties(nearbyEntities[i]).name == "fingerPainting")
                    Entities.deleteEntity(nearbyEntities[i]);*/
            if ((leftBrush == null || rightBrush == null) || (!leftBrush.isDrawing() && !rightBrush.isDrawing()))  {
                checkTabletHasFocus();
            }
            updateTriggerPress();
            updateGripPress();

        }

        function setUp(onTriggerPressed, onTriggerPressing, onTriggerReleased, onGripPressed) {
            triggerPressedCallback = onTriggerPressed;
            triggerPressingCallback = onTriggerPressing;
            triggerReleasedCallback = onTriggerReleased;
            gripPressedCallback = onGripPressed;
        }

        function tearDown() {
            // Nothing to do.
            //Entities
            //if (inkSource){
            //    Entities.deleteEntity(inkSource);
            //    inkSource = null;
            //}
        }

        return {
            onTriggerPress: onTriggerPress,
            onGripPress: onGripPress,
            onUpdate: onUpdate,
            setUp: setUp,
            tearDown: tearDown
        };
    }

    function updateHandFunctions() {
        // Update other scripts' hand functions.
        var enabled = !isFingerPainting || isTabletDisplayed;

        Messages.sendMessage(HIFI_GRAB_DISABLE_MESSAGE_CHANNEL, JSON.stringify({
            holdEnabled: enabled,
            nearGrabEnabled: enabled,
            farGrabEnabled: enabled
        }), true);
        
        
        Messages.sendMessage(HIFI_POINTER_DISABLE_MESSAGE_CHANNEL, JSON.stringify({
            pointerEnabled: false
        }), true);
        
        //    Messages.sendMessage(HIFI_POINTER_DISABLE_MESSAGE_CHANNEL, JSON.stringify({
        //    pointerEnabled: enabled
        //}), true);
        //}), true);
        
        
        
        Messages.sendMessage(HIFI_POINT_INDEX_MESSAGE_CHANNEL, JSON.stringify({
            pointIndex: !enabled
        }), true);
    }
    
    function updateHandAnimations(){
        var ANIM_URL = (isLeftHandDominant? LEFT_ANIM_URL: RIGHT_ANIM_URL );
        var ANIM_OPEN = (isLeftHandDominant? LEFT_ANIM_URL_OPEN: RIGHT_ANIM_URL_OPEN );
        var handLiteral = (isLeftHandDominant? "left": "right" );

        //Clear previous hand animation override
        restoreAllHandAnimations();
        
        //"rightHandGraspOpen","rightHandGraspClosed",
        MyAvatar.overrideRoleAnimation(handLiteral + "HandGraspOpen", ANIM_OPEN, 30, false, 19, 20);
        MyAvatar.overrideRoleAnimation(handLiteral + "HandGraspClosed", ANIM_URL, 30, false, 19, 20);

        //"rightIndexPointOpen","rightIndexPointClosed",
        MyAvatar.overrideRoleAnimation(handLiteral + "IndexPointOpen", ANIM_OPEN, 30, false, 19, 20);
        MyAvatar.overrideRoleAnimation(handLiteral + "IndexPointClosed", ANIM_URL, 30, false, 19, 20);

        //"rightThumbRaiseOpen","rightThumbRaiseClosed",
        MyAvatar.overrideRoleAnimation(handLiteral + "ThumbRaiseOpen", ANIM_OPEN, 30, false, 19, 20);
        MyAvatar.overrideRoleAnimation(handLiteral + "ThumbRaiseClosed", ANIM_URL, 30, false, 19, 20);

        //"rightIndexPointAndThumbRaiseOpen","rightIndexPointAndThumbRaiseClosed", 
        MyAvatar.overrideRoleAnimation(handLiteral + "IndexPointAndThumbRaiseOpen", ANIM_OPEN, 30, false, 19, 20);
        MyAvatar.overrideRoleAnimation(handLiteral + "IndexPointAndThumbRaiseClosed", ANIM_URL, 30, false, 19, 20);
        
        //turn off lasers and other interactions
        Messages.sendLocalMessage("Hifi-Hand-Disabler", "none");
        Messages.sendLocalMessage("Hifi-Hand-Disabler", handLiteral);
        
        
        
        //update ink Source
        var strokeColor = leftBrush.getStrokeColor();
        var strokeWidth = leftBrush.getStrokeWidth()*0.06;
        if (inkSourceOverlay == null){
            inkSourceOverlay = Overlays.addOverlay("sphere", { parentID: MyAvatar.sessionUUID, parentJointIndex: MyAvatar.getJointIndex(handLiteral === "left" ? "LeftHandIndex4" : "RightHandIndex4"), localPosition: { x: 0, y: 0, z: 0 }, size: strokeWidth, color: strokeColor , solid: true });
        } else {
            Overlays.editOverlay(inkSourceOverlay, {
                parentJointIndex: MyAvatar.getJointIndex(handLiteral === "left" ? "LeftHandIndex4" : "RightHandIndex4"),
                localPosition: { x: 0, y: 0, z: 0 },
                size: strokeWidth, 
                color: strokeColor 
            });
        }

    }
    
    function restoreAllHandAnimations(){
        //"rightHandGraspOpen","rightHandGraspClosed",
        MyAvatar.restoreRoleAnimation("rightHandGraspOpen");
        MyAvatar.restoreRoleAnimation("rightHandGraspClosed");

        //"rightIndexPointOpen","rightIndexPointClosed",
        MyAvatar.restoreRoleAnimation("rightIndexPointOpen");
        MyAvatar.restoreRoleAnimation("rightIndexPointClosed");

        //"rightThumbRaiseOpen","rightThumbRaiseClosed",
        MyAvatar.restoreRoleAnimation("rightThumbRaiseOpen");
        MyAvatar.restoreRoleAnimation("rightThumbRaiseClosed");

        //"rightIndexPointAndThumbRaiseOpen","rightIndexPointAndThumbRaiseClosed", 
        MyAvatar.restoreRoleAnimation("rightIndexPointAndThumbRaiseOpen");
        MyAvatar.restoreRoleAnimation("rightIndexPointAndThumbRaiseClosed");
        
        //"leftHandGraspOpen","leftHandGraspClosed",
        MyAvatar.restoreRoleAnimation("leftHandGraspOpen");
        MyAvatar.restoreRoleAnimation("leftHandGraspClosed");

        //"leftIndexPointOpen","leftIndexPointClosed",
        MyAvatar.restoreRoleAnimation("leftIndexPointOpen");
        MyAvatar.restoreRoleAnimation("leftIndexPointClosed");

        //"leftThumbRaiseOpen","leftThumbRaiseClosed",
        MyAvatar.restoreRoleAnimation("leftThumbRaiseOpen");
        MyAvatar.restoreRoleAnimation("leftThumbRaiseClosed");

        //"leftIndexPointAndThumbRaiseOpen","leftIndexPointAndThumbRaiseClosed", 
        MyAvatar.restoreRoleAnimation("leftIndexPointAndThumbRaiseOpen");
        MyAvatar.restoreRoleAnimation("leftIndexPointAndThumbRaiseClosed");
    }

    function pauseProcessing() {
        //Script.update.disconnect(leftHand.onUpdate);
        //Script.update.disconnect(rightHand.onUpdate);

        //Controller.disableMapping(CONTROLLER_MAPPING_NAME);

        Messages.sendLocalMessage("Hifi-Hand-Disabler", "none");

        Messages.unsubscribe(HIFI_POINT_INDEX_MESSAGE_CHANNEL);
        Messages.unsubscribe(HIFI_GRAB_DISABLE_MESSAGE_CHANNEL);
        Messages.unsubscribe(HIFI_POINTER_DISABLE_MESSAGE_CHANNEL);
        
        
        //Restores and clears hand animations
        restoreAllHandAnimations();
    }

     function resumeProcessing() {
        //Change to finger paint hand animation
        updateHandAnimations();
        
        // Messages channels for enabling/disabling other scripts' functions.
        Messages.subscribe(HIFI_POINT_INDEX_MESSAGE_CHANNEL);
        Messages.subscribe(HIFI_GRAB_DISABLE_MESSAGE_CHANNEL);
        Messages.subscribe(HIFI_POINTER_DISABLE_MESSAGE_CHANNEL);
    }
    
    function enableProcessing() {
        // Connect controller API to handController objects.
        leftHand = handController("left");
        rightHand = handController("right");
        
          // Connect handController outputs to paintBrush objects.
        leftBrush = paintBrush("left");
        leftHand.setUp(leftBrush.startLine, leftBrush.drawLine, leftBrush.finishLine, leftBrush.eraseClosestLine);
        rightBrush = paintBrush("right");
        rightHand.setUp(rightBrush.startLine, rightBrush.drawLine, rightBrush.finishLine, rightBrush.eraseClosestLine);

        var controllerMapping = Controller.newMapping(CONTROLLER_MAPPING_NAME);
        controllerMapping.from(Controller.Standard.LT).to(leftHand.onTriggerPress);
        controllerMapping.from(Controller.Standard.LeftGrip).to(leftHand.onGripPress);
        controllerMapping.from(Controller.Standard.RT).to(rightHand.onTriggerPress);
        controllerMapping.from(Controller.Standard.RightGrip).to(rightHand.onGripPress);
        Controller.enableMapping(CONTROLLER_MAPPING_NAME);

        //Change to finger paint hand animation
        updateHandAnimations();
        
        // Messages channels for enabling/disabling other scripts' functions.
        Messages.subscribe(HIFI_POINT_INDEX_MESSAGE_CHANNEL);
        Messages.subscribe(HIFI_GRAB_DISABLE_MESSAGE_CHANNEL);
        Messages.subscribe(HIFI_POINTER_DISABLE_MESSAGE_CHANNEL);

        // Update hand controls.
        Script.update.connect(leftHand.onUpdate);
        Script.update.connect(rightHand.onUpdate);
        
        
        // enable window palette
        /*window = new OverlayWindow({
            title: 'Paint Window',
            source: qml,
            width: 600, height: 600,
        });*/
        
        // 75
        //50
        //window.setPosition(75, 100);
        //window.closed.connect(function() { 
        //Script.stop(); 
        //}); uncomment for qml interface

        /*window.fromQml.connect(function(message){
            if (message[0] === "color"){
                leftBrush.changeStrokeColor(message[1], message[2], message[3]);
                rightBrush.changeStrokeColor(message[1], message[2], message[3]);
                Overlays.editOverlay(inkSourceOverlay, {
                    color: {red: message[1], green: message[2], blue: message[3]} 
                });
                return;
            }
            if (message[0] === "width"){
                print("changing brush width " + message[1]);
                var dim = message[1]*2 +0.1;
                print("changing brush dim " + dim);
                //var dim2 = Math.floor( Math.random()*40 + 5);
                leftBrush.changeStrokeWidthMultiplier(dim);
                rightBrush.changeStrokeWidthMultiplier(dim);
                Overlays.editOverlay(inkSourceOverlay, {
                    size: dim * 0.06 
                
                });
                return;
            }
            if (message[0] === "brush"){
                print("changing brush to qml " + message[1]);

                //var dim2 = Math.floor( Math.random()*40 + 5);
                leftBrush.changeTexture(message[1]);
                rightBrush.changeTexture(message[1]);
                
                if (message[1] === "content/brushes/paintbrush1.png") {
                    leftBrush.changeUVMode(true);
                    rightBrush.changeUVMode(true);
                }else if (message[1] === "content/brushes/paintbrush3.png") {
                    leftBrush.changeUVMode(true);
                    rightBrush.changeUVMode(true);
                }else{
                    leftBrush.changeUVMode(false);
                    rightBrush.changeUVMode(false);
                }
                return;
            }
            if (message[0] === "undo"){
                leftBrush.undoErasing();
                rightBrush.undoErasing();
                return;
            }
            if (message[0] === "hand"){
                isLeftHandDominant = !isLeftHandDominant;
                updateHandAnimations();
                return;
            }
        });*/ //uncomment for qml interface
    }

    function disableProcessing() {
        Script.update.disconnect(leftHand.onUpdate);
        Script.update.disconnect(rightHand.onUpdate);

        Controller.disableMapping(CONTROLLER_MAPPING_NAME);

        Messages.sendLocalMessage("Hifi-Hand-Disabler", "none");
        
        leftBrush.tearDown();
        leftBrush = null;
        leftHand.tearDown();
        leftHand = null;

        rightBrush.tearDown();
        rightBrush = null;
        rightHand.tearDown();
        rightHand = null;

        Messages.unsubscribe(HIFI_POINT_INDEX_MESSAGE_CHANNEL);
        Messages.unsubscribe(HIFI_GRAB_DISABLE_MESSAGE_CHANNEL);
        Messages.unsubscribe(HIFI_POINTER_DISABLE_MESSAGE_CHANNEL);
        
        
        //Restores and clears hand animations
        restoreAllHandAnimations();
        
        //clears Overlay sphere
        Overlays.deleteOverlay(inkSourceOverlay);
        inkSourceOverlay = null;
        
        // disable window palette
        //window.close(); //uncomment for qml interface
    }

    //Load last fingerpaint settings
    function restoreLastValues() {
        savedSettings = new Object();
        savedSettings.currentColor = Settings.getValue("currentColor", {red: 250, green: 0, blue: 0, origin: "custom"}),
        savedSettings.currentStrokeWidth = Settings.getValue("currentStrokeWidth", 0.25);
        savedSettings.currentTexture = Settings.getValue("currentTexture", null);
        savedSettings.currentDrawingHand = Settings.getValue("currentDrawingHand", false);
        savedSettings.currentDynamicBrushes = Settings.getValue("currentDynamicBrushes", []);
        savedSettings.customColors = Settings.getValue("customColors", []);
        savedSettings.currentTab = Settings.getValue("currentTab", 0);
        savedSettings.currentTriggerWidthEnabled = Settings.getValue("currentTriggerWidthEnabled", true);
        isLeftHandDominant = savedSettings.currentDrawingHand;
    }

    function onButtonClicked() {
        restoreLastValues();
        //isFingerPainting = false;
        var wasFingerPainting = isFingerPainting;

        isFingerPainting = !isFingerPainting;
        if (!isFingerPainting) {
            tablet.gotoHomeScreen();
        }
        button.editProperties({ isActive: isFingerPainting });

        print("Finger painting: " + isFingerPainting ? "on" : "off");

        if (wasFingerPainting) {
            leftBrush.cancelLine();
            rightBrush.cancelLine();
        }

        if (isFingerPainting) {
            tablet.gotoWebScreen(APP_URL + "?" + encodeURIComponent(JSON.stringify(savedSettings)));
            enableProcessing();
        }
        updateHandFunctions();

        if (!isFingerPainting) {
            disableProcessing();
            Controller.mousePressEvent.disconnect(mouseStartLine);
            Controller.mouseMoveEvent.disconnect(mouseDrawLine);
            Controller.mouseReleaseEvent.disconnect(mouseFinishLine);
        } else {
            Controller.mousePressEvent.connect(mouseStartLine);
            Controller.mouseMoveEvent.connect(mouseDrawLine);
            Controller.mouseReleaseEvent.connect(mouseFinishLine);
        }
    }

    function onTabletScreenChanged(type, url) {
        var TABLET_SCREEN_CLOSED = "Closed";
        var TABLET_SCREEN_HOME = "Home";

        isTabletDisplayed = type !== TABLET_SCREEN_CLOSED;
        if (type === TABLET_SCREEN_HOME) {
            if (isFingerPainting) {
                isFingerPainting = false;
                disableProcessing();
            }
            button.editProperties({ isActive: isFingerPainting });
            print("Closing the APP");
        }
        updateHandFunctions();
    }


    function onWebEventReceived(event){
        print("Received Web Event: " + event);

        if (typeof event === "string") {
            event = JSON.parse(event);
        }
        switch (event.type) {
            case "appReady":
                isTabletFocused = false; //make sure we can set the focus on the tablet again
                break;
            case "changeTab":
                Settings.setValue("currentTab", event.currentTab);
                break;
            case "changeColor":
                if (!isBrushColored) {
                    print("HMD ACTIVE: " + HMD.active);
                    Settings.setValue("currentColor", event);
                    //print("changing color...");
                    leftBrush.changeStrokeColor(event.red, event.green, event.blue);
                    rightBrush.changeStrokeColor(event.red, event.green, event.blue);
                    Overlays.editOverlay(inkSourceOverlay, {
                        color: {red: event.red, green: event.green, blue: event.blue} 
                    });
                } 
                break;
            case "switchTriggerPressureWidth":
                //print("changing pressure sensitive width...");
                Settings.setValue("currentTriggerWidthEnabled", event.enabled);
                leftBrush.setTriggerPressureWidthEnabled(event.enabled);
                rightBrush.setTriggerPressureWidthEnabled(event.enabled);
                break;
            case "addCustomColor":
                //print("Adding custom color");
                var customColors = Settings.getValue("customColors", []);
                customColors.push({red: event.red, green: event.green, blue: event.blue});
                if (customColors.length > event.maxColors) {
                    customColors.splice(0, 1); //remove first color
                }
                Settings.setValue("customColors", customColors);
                break;


            case "changeBrush":
                //print("abrushType: " + event.brushType);
                Settings.setValue("currentTexture", event);
                if (event.brushType === "repeat") {
                    print("brushType: " + event.brushType);
                    leftBrush.changeUVMode(false);
                    rightBrush.changeUVMode(false);
                } else if (event.brushType === "stretch") {
                    print("brushType: " + event.brushType);
                    leftBrush.changeUVMode(true);
                    rightBrush.changeUVMode(true);
                } 
                isBrushColored = event.isColored;
                if (event.isColored) {
                    Settings.setValue("currentColor", {red: 255, green: 255, blue: 255});
                    leftBrush.changeStrokeColor(255, 255, 255);
                    rightBrush.changeStrokeColor(255, 255, 255);
                    Overlays.editOverlay(inkSourceOverlay, {
                        color: {red: 255, green: 255, blue: 255} 
                    });
                }
                //print("changing brush to " + event.brushName);
                event.brushName = CONTENT_PATH + "/" + event.brushName;
                leftBrush.changeTexture(event.brushName);
                rightBrush.changeTexture(event.brushName);
                break;

            case "changeLineWidth":
                Settings.setValue("currentStrokeWidth", event.brushWidth);
                var dim = event.brushWidth * 2 + 0.1;
                //print("changing brush width dim to " + dim);
                //var dim2 = Math.floor( Math.random()*40 + 5);
                leftBrush.changeStrokeWidthMultiplier(dim);
                rightBrush.changeStrokeWidthMultiplier(dim);
                Overlays.editOverlay(inkSourceOverlay, {
                    size: dim * 0.06 
                });
                break;

            case "undo":
                //print("Going to undo");
                
                //The undo is called only on the right brush because the undo stack is global, meaning that
                //calling undoErasing on both the left and right brush would cause the stack to pop twice.
                //Using the leftBrush instead of the rightBrush would have the exact same effect.
                rightBrush.undoErasing();
                break;

            case "changeBrushHand":
                Settings.setValue("currentDrawingHand", event.DrawingHand == "left");
                isLeftHandDominant = event.DrawingHand == "left";
                updateHandAnimations();
                break;

            case "switchDynamicBrush":
                var dynamicBrushes = Settings.getValue("currentDynamicBrushes", []);
                var brushSettingsIndex = dynamicBrushes.indexOf(event.dynamicBrushID);
                if (brushSettingsIndex > -1) { //already exists so we are disabling it
                    dynamicBrushes.splice(brushSettingsIndex, 1);
                } else { //doesn't exist yet so we are just adding it
                    dynamicBrushes.push(event.dynamicBrushID);
                }
                Settings.setValue("currentDynamicBrushes", dynamicBrushes);
                DynamicBrushesInfo[event.dynamicBrushName].isEnabled = event.enabled;
                DynamicBrushesInfo[event.dynamicBrushName].settings = event.settings;
                //print("SEtting dynamic brush" + JSON.stringify(DynamicBrushesInfo[event.dynamicBrushName]));
                break;

            default:
                break;
        }
    }    

    function addAnimationToBrush(entityID) {
        Object.keys(DynamicBrushesInfo).forEach(function(animationName) {
            print(animationName + "Brushes INfo 0" + JSON.stringify(DynamicBrushesInfo));
            if (DynamicBrushesInfo[animationName].isEnabled) {
                var prevUserData = Entities.getEntityProperties(entityID).userData;
                prevUserData = prevUserData == "" ? new Object() : JSON.parse(prevUserData); //preserve other possible user data
                if (prevUserData.animations == null) {
                    prevUserData.animations = {};
                }
                prevUserData.animations[animationName] = dynamicBrushFactory(animationName, DynamicBrushesInfo[animationName].settings);
                Entities.editEntity(entityID, {userData: JSON.stringify(prevUserData)});    
                //Entities.editEntity(entityID, {script: Script.resolvePath("content/brushes/dynamicBrushes/dynamicBrushScript.js")});    
            }
        });
    }

    function addElementToUndoStack(item)
    {
        if (undoStack.length + 1 > UNDO_STACK_SIZE) {
            undoStack.splice(0, 1);
        }
        undoStack.push(item);
    }

    function setUp() {
        tablet = Tablet.getTablet("com.highfidelity.interface.tablet.system");
        if (!tablet) {
            return;
        }
        tablet.webEventReceived.connect(onWebEventReceived);
        // Tablet button.
        button = tablet.addButton({
            icon: "icons/tablet-icons/finger-paint-i.svg",
            activeIcon: "icons/tablet-icons/finger-paint-a.svg",
            text: BUTTON_NAME,
            isActive: isFingerPainting
        });
        button.clicked.connect(onButtonClicked);
        // Track whether tablet is displayed or not.
        tablet.screenChanged.connect(onTabletScreenChanged);
    }

    function tearDown() {
        if (!tablet) {
            return;
        }

        if (isFingerPainting) {
            isFingerPainting = false;
            updateHandFunctions();
            disableProcessing();
        }

        tablet.screenChanged.disconnect(onTabletScreenChanged);

        button.clicked.disconnect(onButtonClicked);
        tablet.removeButton(button);
    }
   
    function getFingerPosition(x, y) {
        var pickRay = Camera.computePickRay(x, y);
        return Vec3.sum(pickRay.origin, Vec3.multiply(pickRay.direction, 5));
    }

    function mouseDrawLine(event){
        if (rightBrush && rightBrush.isDrawing()) {
            rightBrush.drawLine(getFingerPosition(event.x, event.y), 0.03);
        }
    }

    function mouseStartLine(event){
        print(JSON.stringify(event));
        if (event.isLeftButton) {
            rightBrush.startLine(getFingerPosition(event.x, event.y), 0.03);

        } else if (event.isMiddleButton) {
            //delete first line in sight
            //var pickRay = getFingerPosition(event.x, event.y);
           // entities = Entities.findEntities(MyAvatar.position, 10);
            // Fine polyline entity with closest point within search radius.
            /*for (i = 0, entitiesLength = entities.length; i < entitiesLength; i += 1) {
                print("NEAR ENTITIES: " + JSON.stringify(Entities.getEntityProperties(entities[i])));
            }*/

            var pickRay = Camera.computePickRay(event.x, event.y);
            var entityToDelete = Entities.findRayIntersection(pickRay, false, [Entities.findEntities(MyAvatar.position, 1000)], []);
            print("Entity to DELETE: " + JSON.stringify(entityToDelete));
            var line3d = Overlays.addOverlay("line3d", {
                start: pickRay.origin, 
                end: Vec3.sum(pickRay.origin, Vec3.multiply(pickRay.direction, 100)),
                color: { red: 255, green: 0, blue: 255},
                lineWidth: 5
            });
            if (entityToDelete.intersects) {
                print("Entity to DELETE Properties: " + JSON.stringify(Entities.getEntityProperties(entityToDelete.entityID)));
                //Entities.deleteEntity(entityToDelete.entityID);
            }
        }
    }

    function mouseFinishLine(event){
        isMouseDrawing = false;
        if (rightBrush && rightBrush.isDrawing()) {
            rightBrush.finishLine(getFingerPosition(event.x, event.y), 0.03);
        }
    }

    setUp();
    Script.scriptEnding.connect(tearDown);    
}());