Equip stick instead of grab. String is less rigid. Fixed bug where the ball was not recognized when other clients equipped the stick.

scripts/tutorials/createTetherballStick.js

@@ -14,20 +14,61 @@
 // Distributed under the Apache License, Version 2.0.
 // See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html
 
+var NULL_UUID = "{00000000-0000-0000-0000-000000000000}";
+var LIFETIME = 3600;
+var BALL_SIZE = 0.175;
+var BALL_DAMPING = 0.5;
+var BALL_ANGULAR_DAMPING = 0.5;
+var BALL_RESTITUTION = 0.4;
+var BALL_DENSITY = 1000;
 var STICK_SCRIPT_URL = Script.resolvePath("./entity_scripts/tetherballStick.js?v=" + Date.now());
 var STICK_MODEL_URL = "http://hifi-content.s3.amazonaws.com/caitlyn/production/raveStick/newRaveStick2.fbx";
+var COLLISION_SOUND_URL = "http://public.highfidelity.io/sounds/Footsteps/FootstepW3Left-12db.wav";
 
 var avatarOrientation = MyAvatar.orientation;
 avatarOrientation = Quat.safeEulerAngles(avatarOrientation);
 avatarOrientation.x = 0;
 avatarOrientation = Quat.fromVec3Degrees(avatarOrientation);
-var startPosition = Vec3.sum(MyAvatar.getRightPalmPosition(), Vec3.multiply(1, Quat.getFront(avatarOrientation)));
+var front = Quat.getFront(avatarOrientation);
+var stickStartPosition = Vec3.sum(MyAvatar.getRightPalmPosition(), front);
+var ballStartPosition = Vec3.sum(stickStartPosition, Vec3.multiply(0.36, front));
+
+var ballID = Entities.addEntity({
+    type: "Model",
+    modelURL: "http://hifi-content.s3.amazonaws.com/Examples%20Content/production/marblecollection/Star.fbx",
+    name: "TetherballStick Ball",
+    shapeType: "Sphere",
+    position: ballStartPosition,
+    lifetime: LIFETIME,
+    collisionSoundURL: COLLISION_SOUND_URL,
+    dimensions: {
+        x: BALL_SIZE,
+        y: BALL_SIZE,
+        z: BALL_SIZE
+    },
+    gravity: {
+        x: 0.0,
+        y: -9.8,
+        z: 0.0
+    },
+    damping: BALL_DAMPING,
+    angularDamping: BALL_ANGULAR_DAMPING,
+    density: BALL_DENSITY,
+    restitution: BALL_RESTITUTION,
+    dynamic: true,
+    collidesWith: "static,dynamic,otherAvatar,",
+    userData: JSON.stringify({
+        grabbableKey: {
+            grabbable: false
+        }
+    })
+});
 
 var STICK_PROPERTIES = {
     type: 'Model',
     name: "TetherballStick Stick",
     modelURL: STICK_MODEL_URL,
-    position: startPosition,
+    position: stickStartPosition,
     rotation: MyAvatar.orientation,
     dimensions: {
         x: 0.0651,
@@ -41,31 +82,40 @@ var STICK_PROPERTIES = {
         blue: 20
     },
     shapeType: 'box',
-    lifetime: 3600,
+    lifetime: LIFETIME,
     userData: JSON.stringify({
         grabbableKey: {
-            grabbable: true,
+          invertSolidWhileHeld: true,
-            spatialKey: {
+          ignoreIK: false
-                rightRelativePosition: {
-                    x: 0.05,
-                    y: 0,
-                    z: 0
-                },
-                leftRelativePosition: {
-                    x: -0.05,
-                    y: 0,
-                    z: 0
-                },
-                relativeRotation: {
-                    x: 0.4999999701976776,
-                    y: 0.4999999701976776,
-                    z: -0.4999999701976776,
-                    w: 0.4999999701976776
-                }
-            },
-            invertSolidWhileHeld: true
         },
-        ownerID: MyAvatar.sessionUUID
+        wearable: {
+          joints: {
+            RightHand: [{
+              x: 0.15539926290512085,
+              y: 0.14493153989315033,
+              z: 0.023641478270292282
+            }, {
+              x: 0.5481458902359009,
+              y: -0.4470711946487427,
+              z: -0.3148134648799896,
+              w: 0.6328644752502441
+            }],
+            LeftHand: [{
+            	x: -0.14998853206634521,
+            	y: 0.17033983767032623,
+            	z: 0.023199155926704407
+            },
+            {
+            	x: 0.6623835563659668,
+            	y: -0.1671387255191803,
+            	z: 0.7071226835250854,
+            	w: 0.1823924481868744
+            }]
+          }
+        },
+        ownerID: MyAvatar.sessionUUID,
+        ballID: ballID,
+        lifetime: LIFETIME
     })
 };
 

scripts/tutorials/entity_scripts/tetherballStick.js

@@ -18,178 +18,107 @@
     var _this;
 
     var NULL_UUID = "{00000000-0000-0000-0000-000000000000}";
-    var ENTITY_CHECK_INTERVAL = 5; // time in sec
     var LINE_WIDTH = 0.02;
-    var BALL_SIZE = 0.175;
+    var MAX_DISTANCE_MULTIPLIER = 4;
-    var BALL_DAMPING = 0.5;
+    var ACTION_DISTANCE = 0.35;
-    var BALL_ANGULAR_DAMPING = 0.5;
+    var ACTION_TIMESCALE = 0.035;
-    var BALL_RESTITUTION = 0.4;
-    var BALL_DENSITY = 1000;
-    var MAX_DISTANCE_MULTIPLIER = 2;
-    var ACTION_DISTANCE = 0.25;
-    var ACTION_TIMESCALE = 0.025;
-    var ACTION_TAG = "TetherballStick Action";
-    var BALL_NAME = "TetherballStick Ball";
-    var LINE_NAME = "TetherballStick Line";
     var COLLISION_SOUND_URL = "http://public.highfidelity.io/sounds/Footsteps/FootstepW3Left-12db.wav";
-    var INTERACT_SOUND_URL = "http://hifi-public.s3.amazonaws.com/sounds/color_busters/powerup.wav";
-    var INTERACT_SOUND_VOLUME = 0.2;
-    var USE_INTERACT_SOUND = false;
-    var AVATAR_CHECK_RANGE = 5; // in meters
     var TIP_OFFSET = 0.26;
     var LIFETIME = 3600;
 
     tetherballStick = function() {
         _this = this;
-        return;
     };
 
     tetherballStick.prototype = {
-        lastCheckForEntities: ENTITY_CHECK_INTERVAL,
+        entityID: NULL_UUID,
-        originalDimensions: null,
-        ownerID: NULL_UUID,
-        userID: NULL_UUID,
         ballID: NULL_UUID,
         lineID: NULL_UUID,
-        actionID: NULL_UUID,
+
-        INTERACT_SOUND: undefined,
+        getUserData: function(key) {
+          try {
+            var stickProps = Entities.getEntityProperties(this.entityID);
+            var userData = JSON.parse(stickProps.userData);
+            return userData[key];
+          } catch (e) {
+            print("Error parsing Tetherball Stick UserData in file " +
+                  e.fileName + " on line " + e.lineNumber);
+          }
+        },
 
         preload: function(entityID) {
             this.entityID = entityID;
-            if (USE_INTERACT_SOUND) {
+            this.ballID = this.getUserData("ballID");
-                this.INTERACT_SOUND = SoundCache.getSound(INTERACT_SOUND_URL);
-            }
-            this.originalDimensions = Entities.getEntityProperties(this.entityID).dimensions;
-            Script.update.connect(this.update);
-        },
-
-        unload: function() {
-            Script.update.disconnect(this.update);
         },
 
         update: function(dt) {
-            // _this during update due to loss of scope
+          _this.drawLine();
-            if (_this.lastCheckForEntities >= ENTITY_CHECK_INTERVAL) {
+        },
-                _this.lastCheckForEntities = 0;
-                // everyone will be running this update loop
-                // the only action is to increment the timer till ENTITY_CHECK_INTERVAL
-                // when that is reached the userdata ownerID is simply validated by everyone
-                // if it's invalid call setNewOwner, to set a new valid user
-                if (!_this.checkForOwner()) {
-                    return;
-                }
 
-                // only one person should ever be running this far
+        startEquip: function(id, params) {
-                if (_this.ownerID == MyAvatar.sessionUUID) {
+          this.removeActions();
-                    _this.checkForEntities();
+          this.createLine();
-                }
+
+          Script.update.connect(this.update);
+        },
+
+        continueEquip: function(id, params) {
+          var stickProps = Entities.getEntityProperties(this.entityID);
+          var ballProps = Entities.getEntityProperties(this.ballID);
+          var tipPosition = this.getTipPosition();
+          var distance = Vec3.distance(tipPosition, ballProps.position);
+          var maxDistance = ACTION_DISTANCE;
+
+          var dVel = Vec3.subtract(ballProps.velocity, stickProps.velocity);
+          var dPos = Vec3.subtract(ballProps.position, stickProps.position);
+          var ballWithinMaxDistance = distance <= maxDistance;
+          var ballMovingCloserToStick = Vec3.dot(dVel, dPos) < 0;
+          var ballAboveStick = ballProps.position.y > tipPosition.y;
+
+          if(this.hasAction()) {
+            if(ballWithinMaxDistance && (ballMovingCloserToStick || ballAboveStick)) {
+              this.removeActions();
             } else {
-                _this.lastCheckForEntities += dt;
+              this.updateOffsetAction();
             }
+          } else if(!ballWithinMaxDistance && !ballMovingCloserToStick){
+            this.createOffsetAction();
+          }
 
-            _this.drawLine();
+          this.capBallDistance();
         },
 
-        getScale: function() {
+        releaseEquip: function(id, params) {
-            var stickProps = Entities.getEntityProperties(this.entityID);
+          this.deleteLine();
-            return stickProps.dimensions.z / this.originalDimensions.z;
+          this.createSpringAction();
-        },
 
-        checkForOwner: function() {
+          Script.update.disconnect(this.update);
-            var stickProps = Entities.getEntityProperties(this.entityID);
-            try {
-                var stickData = JSON.parse(stickProps.userData);
-                var owner = AvatarManager.getAvatar(stickData.ownerID);
-                if (owner.sessionUUID !== undefined) {
-                    this.ownerID = owner.sessionUUID;
-                    return true;
-                } else {
-                    // UUID is invalid
-                    this.setNewOwner();
-                    return false;
-                }
-            } catch (e) {
-                // all other errors
-                this.setNewOwner();
-                return false;
-            }
-        },
-
-        setNewOwner: function() {
-            var stickProps = Entities.getEntityProperties(this.entityID);
-            // I only want the closest client to be in charge of creating objects.
-            // the AvatarList also contains a null representing MyAvatar,
-            // a new array is created to start with containing the proper UUID
-            var avatarList = AvatarList.getAvatarIdentifiers()
-                .filter(Boolean) // remove the null
-                .concat(MyAvatar.sessionUUID); // add the ID
-
-            var closestAvatarID = undefined;
-            var closestAvatarDistance = AVATAR_CHECK_RANGE;
-            avatarList.forEach(function(avatarID) {
-                var avatar = AvatarList.getAvatar(avatarID);
-                var distFrom = Vec3.distance(avatar.position, stickProps.position);
-                if (distFrom < closestAvatarDistance) {
-                    closestAvatarDistance = distFrom;
-                    closestAvatarID = avatarID;
-                }
-            });
-
-            // add reference to userData
-            try {
-                var stickData = JSON.parse(stickProps.userData);
-                stickData.ownerID = closestAvatarID; //NOTE: this will assign undefined if all avatars are further than AVATAR_CHECK_RANGE
-                Entities.editEntity(this.entityID, {
-                    userData: JSON.stringify(stickData)
-                });
-            } catch (e) {
-            }
-        },
-
-        checkForEntities: function() {
-            if (!this.hasBall()) {
-                this.createBall();
-            }
-            if (!this.hasAction()) {
-                this.createAction();
-            }
-        },
-
-        playInteractionSound: function() {
-            var stickProps = Entities.getEntityProperties(this.entityID);
-            var INTERACT_SOUND_OPTIONS = {
-                volume: INTERACT_SOUND_VOLUME,
-                loop: false,
-                position: stickProps.position
-            };
-            Audio.playSound(this.INTERACT_SOUND, INTERACT_SOUND_OPTIONS);
         },
 
         getTipPosition: function() {
-            var stickProps = Entities.getEntityProperties(this.entityID);
+          var stickProps = Entities.getEntityProperties(this.entityID);
+          var stickFront = Quat.getFront(stickProps.rotation);
+          var frontOffset = Vec3.multiply(stickFront, TIP_OFFSET);
+          var tipPosition = Vec3.sum(stickProps.position, frontOffset);
 
-            var scale = this.getScale();
+          return tipPosition;
-            var frontVec = Quat.getFront(stickProps.rotation);
-            var frontOffset = Vec3.multiply(frontVec, TIP_OFFSET * scale);
-            var tipPosition = Vec3.sum(stickProps.position, frontOffset);
-
-            return tipPosition;
         },
 
         getStickFrontPosition: function() {
-            var stickProps = Entities.getEntityProperties(this.entityID);
+          var stickProps = Entities.getEntityProperties(this.entityID);
-            var stickFront = Quat.getFront(stickProps.rotation);
+          var stickFront = Quat.getFront(stickProps.rotation);
-            var tipPosition = this.getTipPosition();
+          var tipPosition = this.getTipPosition();
-            return Vec3.sum(tipPosition, Vec3.multiply(TIP_OFFSET*.4, stickFront));
+          var frontPostion = Vec3.sum(tipPosition, Vec3.multiply(TIP_OFFSET * 0.4, stickFront));
+
+          return frontPostion;
         },
 
         capBallDistance: function() {
             var stickProps = Entities.getEntityProperties(this.entityID);
             var ballProps = Entities.getEntityProperties(this.ballID);
             var tipPosition = this.getTipPosition();
-            var scale = this.getScale();
             var distance = Vec3.distance(tipPosition, ballProps.position);
-            var maxDistance = ACTION_DISTANCE * MAX_DISTANCE_MULTIPLIER * scale;
+            var maxDistance = ACTION_DISTANCE * MAX_DISTANCE_MULTIPLIER;
 
             if(distance > maxDistance) {
                 var direction = Vec3.normalize(Vec3.subtract(ballProps.position, tipPosition));
@@ -200,175 +129,39 @@
             }
         },
 
-        startNearGrab: function(id, params) {
-            var stickProps = Entities.getEntityProperties(this.entityID);
-            // set variables from data in case someone else created the components
-            try {
-                var stickData = JSON.parse(stickProps.userData);
-                this.userID = MyAvatar.sessionUUID;
-                this.ballID = stickData.ballID;
-                this.actionID = stickData.actionID;
-                if(!this.hasLine()) {
-                    this.createLine();
-                }
-                if (USE_INTERACT_SOUND) {
-                    var hand = params[0];
-                    Controller.triggerShortHapticPulse(1, hand);
-                    this.playInteractionSound();
-                }
-            } catch (e) { }
-        },
-
-        releaseGrab: function(id, params) {
-            this.userID = NULL_UUID;
-            if (USE_INTERACT_SOUND) {
-                this.playInteractionSound();
-            }
-        },
-
-        continueNearGrab: function(id, params) {
-            this.repositionAction();
-            this.updateDimensions();
-            this.capBallDistance();
-        },
-
         createLine: function() {
-            var stickProps = Entities.getEntityProperties(this.entityID);
+          if(!this.hasLine()) {
             this.lineID = Entities.addEntity({
                 type: "PolyLine",
-                name: LINE_NAME,
+                name: "TetherballStick Line",
                 color: {
                     red: 0,
                     green: 120,
                     blue: 250
                 },
                 textures: "https://hifi-public.s3.amazonaws.com/alan/Particles/Particle-Sprite-Smoke-1.png",
-                position: stickProps.position,
+                position: this.getTipPosition(),
                 dimensions: {
                     x: 10,
                     y: 10,
                     z: 10
                 },
-                lifetime: LIFETIME
+                lifetime: this.getUserData("lifetime")
             });
+          }
         },
 
         deleteLine: function() {
-            Entities.deleteEntity(this.lineID);
+          Entities.deleteEntity(this.lineID);
-            this.lineID = NULL_UUID;
+          this.lineID = NULL_UUID;
         },
 
         hasLine: function() {
-            var lineProps = Entities.getEntityProperties(this.lineID);
+            return this.lineID != NULL_UUID;
-            return lineProps.name == LINE_NAME;
-        },
-
-        createBall: function() {
-            var stickProps = Entities.getEntityProperties(this.entityID);
-
-            this.ballID = Entities.addEntity({
-                type: "Model",
-                modelURL: "http://hifi-content.s3.amazonaws.com/Examples%20Content/production/marblecollection/Star.fbx",
-                name: BALL_NAME,
-                shapeType: "Sphere",
-                position: this.getStickFrontPosition(),
-                lifetime: LIFETIME,
-                collisionSoundURL: COLLISION_SOUND_URL,
-                dimensions: {
-                    x: BALL_SIZE,
-                    y: BALL_SIZE,
-                    z: BALL_SIZE
-                },
-                gravity: {
-                    x: 0.0,
-                    y: -9.8,
-                    z: 0.0
-                },
-                damping: BALL_DAMPING,
-                angularDamping: BALL_ANGULAR_DAMPING,
-                density: BALL_DENSITY,
-                restitution: BALL_RESTITUTION,
-                dynamic: true,
-                collidesWith: "static,dynamic,otherAvatar,",
-                userData: JSON.stringify({
-                    grabbableKey: {
-                        grabbable: false
-                    }
-                })
-            });
-
-            // add reference to userData
-            try {
-                var stickData = JSON.parse(stickProps.userData);
-                stickData.ballID = this.ballID;
-                Entities.editEntity(this.entityID, {
-                    userData: JSON.stringify(stickData)
-                });
-            } catch (e) {}
-        },
-
-        hasBall: function() {
-            // validate the userData to handle unexpected item deletion
-            var stickProps = Entities.getEntityProperties(this.entityID);
-            try {
-                var data = JSON.parse(stickProps.userData);
-                var ballProps = Entities.getEntityProperties(data.ballID);
-                return ballProps.name == BALL_NAME;
-            } catch (e) {
-                return false;
-            }
-        },
-
-        createAction: function() {
-            var stickProps = Entities.getEntityProperties(this.entityID);
-            this.actionID = Entities.addAction("offset", this.ballID, {
-                pointToOffsetFrom: stickProps.position,
-                linearDistance: ACTION_DISTANCE,
-                tag: ACTION_TAG,
-                linearTimeScale: ACTION_TIMESCALE
-            });
-
-            // add reference to userData
-            try {
-                var stickData = JSON.parse(stickProps.userData);
-                stickData.actionID = this.actionID;
-                Entities.editEntity(this.entityID, {
-                    userData: JSON.stringify(stickData)
-                });
-            } catch (e) {}
-        },
-
-        hasAction: function() {
-            // validate the userData to handle unexpected item deletion
-            var stickProps = Entities.getEntityProperties(this.entityID);
-            try {
-                var stickData = JSON.parse(stickProps.userData);
-                var actionProps = Entities.getActionArguments(stickData.ballID, stickData.actionID);
-                return actionProps.tag == ACTION_TAG;
-            } catch (e) {
-                return false;
-            }
-        },
-
-        hasRequiredComponents: function() {
-            return this.hasBall() && this.hasAction() && this.hasLine();
-        },
-
-        updateDimensions: function() {
-            var scale = this.getScale();
-            Entities.editEntity(this.ballID, {
-                dimensions: {
-                    x: BALL_SIZE * scale,
-                    y: BALL_SIZE * scale,
-                    z: BALL_SIZE * scale
-                }
-            });
         },
 
         drawLine: function() {
-            if(!this.hasLine())
+          if(this.hasLine()) {
-                return;
-
             var stickProps = Entities.getEntityProperties(this.entityID);
             var tipPosition = this.getTipPosition();
             var ballProps = Entities.getEntityProperties(this.ballID);
@@ -390,19 +183,59 @@
                 strokeWidths: strokeWidths,
                 position: tipPosition,
             });
+          }
         },
 
-        repositionAction: function() {
+        createOffsetAction: function() {
-            var stickProps = Entities.getEntityProperties(this.entityID);
+          this.removeActions();
-            var tipPosition = this.getTipPosition();
-            var scale = this.getScale();
 
-            Entities.updateAction(this.ballID, this.actionID, {
+          Entities.addAction("offset", this.ballID, {
-                pointToOffsetFrom: tipPosition,
+              pointToOffsetFrom: this.getTipPosition(),
-                linearDistance: ACTION_DISTANCE * scale,
+              linearDistance: ACTION_DISTANCE,
-                tag: ACTION_TAG,
+              linearTimeScale: ACTION_TIMESCALE
-                linearTimeScale: ACTION_TIMESCALE
+          });
+        },
+
+        createSpringAction: function() {
+          this.removeActions();
+
+          Entities.addAction("spring", this.ballID, {
+              targetPosition: this.getTipPosition(),
+              linearTimeScale: ACTION_TIMESCALE
+          });
+        },
+
+        updateOffsetAction: function() {
+          var actionIDs = Entities.getActionIDs(this.ballID);
+          var actionID;
+
+          // Sometimes two offset actions are applied to the ball simultaneously.
+          // Here we ensure that only the most recent action is updated
+          // and the rest are deleted.
+          while(actionIDs.length > 1) {
+            actionID = actionIDs.shift();
+            Entities.deleteAction(this.ballID, actionID);
+          }
+
+          actionID = actionIDs.shift();
+          if(actionID) {
+            Entities.updateAction(this.ballID, actionID, {
+                pointToOffsetFrom: this.getTipPosition()
             });
+          }
+        },
+
+        removeActions: function() {
+          // Ball should only ever have one action, but sometimes sneaky little actions attach themselves
+          // So we remove all possible actions in this call.
+          var actionIDs = Entities.getActionIDs(this.ballID);
+          for(var i = 0; i < actionIDs.length; i++) {
+            Entities.deleteAction(this.ballID, actionIDs[i]);
+          }
+        },
+
+        hasAction: function() {
+          return Entities.getActionIDs(this.ballID).length > 0;
         }
     };