overte/examples/toybox/bow/arrow.js

//
//  arrow.js 
//
//  This script attaches to an arrow to make it stop and stick when it hits something.  Could use this to make it a fire arrow or really give any kind of property to itself or the entity it hits.
//  
//  Created by James B. Pollack @imgntn on 10/19/2015
//  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
//

(function() {

    var _this;

    function Arrow() {
        _this = this;
        return;
    }

    Arrow.prototype = {
        stickOnCollision: false,
        glow: false,
        glowBox: null,
        isBurning:false,
        preload: function(entityID) {
            this.entityID = entityID;
            this.isBurning = this.checkIfBurning();
            if (this.isBurning === true || this.glow === true) {
                Script.update.connect(this.updateArrowProperties);
            }
            if (this.isBurning === true) {
                Script.update.connect(this.updateFirePosition);

            }
            if (this.glow === true && this.glowBow === null) {
                this.createGlowBox();
                Script.update.connect(this.updateGlowBoxPosition);
            }
        },

        unload: function() {

            Script.update.disconnect(this.updateArrowProperties);

            if (this.isBurning) {
                Script.update.disconnect(this.updateFirePosition);

            }
            if (this.glowBox !== null) {
                Script.update.disconnect(this.updateGlowBoxPosition);
            }

        },

        checkIfBurning: function() {
            var properties = Entities.getEntityProperties(this.entityID, "userData");
            var userData = JSON.parse(properties.userData);
            var fire = false;

            if (userData.hasOwnProperty('hifiFireArrowKey')) {
                this.fire = userData.hifiFireArrowKey.fire;
                return true

            } else {
                return false;
            }
        },

        createGlowBox: function() {
            var glowBowProperties = {
                name: 'Arrow Glow Box',
                type: 'Box',
                dimensions: {
                    x: 0.02,
                    y: 0.02,
                    z: 0.64
                },
                color: {
                    red: 255,
                    green: 0,
                    blue: 255
                },
            };

            _this.glowBox = Entities.addEntity(glowBowProperties);
        },
        updateArrowProperties: function() {
            _this.arrowProperties = Entities.getEntityProperties(_this.entityID, ["position", "rotation"]);
        },
        updateGlowBoxPosition: function() {
            //once parenting is available, just attach the glowbow to the arrow
            Entities.editEntity(_this.entityID, {
                position: _this.arrowProperties.position,
                rotation: _this.arrowProperties.rotation
            })
        },
        updateFirePosition: function() {
            //once parenting is available, just attach the glowbow to the arrow
            Entities.editEntity(_this.entityID, {
                position: _this.arrowProperties.position
            })
        },

        collisionWithEntity: function(me, otherEntity, collision) {
            Vec3.print('penetration = ', collision.penetration);
            Vec3.print('collision contact point = ', collision.contactPoint);

            if (this.stickOnCollision === true) {
                Entities.editEntity(this.entityID, {
                    velocity: {
                        x: 0,
                        y: 0,
                        z: 0
                    },
                    gravity: {
                        x: 0,
                        y: 0,
                        z: 0
                    },
                    collisionsWillMove: false

                })
            }

        }
    }

    function deleteEntity(entityID) {
        if (entityID === this.entityID) {
            if (_this.isBurning === true) {
                _this.deleteEntity(_this.fire);
            }
        }
    }

    Entities.deletingEntity.connect(deleteEntity);


    return new Arrow;
})