overte/examples/sprayPaintSpawner.js

//  sprayPaintSpawner.js
//
//  Created by Eric Levin on 9/3/15
//  Copyright 2015 High Fidelity, Inc.
//
//  This is script spwans a spreay paint can model with the sprayPaintCan.js entity script attached
//
//  Distributed under the Apache License, Version 2.0.
//  See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html

var scriptURL = "entityScripts/sprayPaintCan.js";
var center = Vec3.sum(MyAvatar.position, Vec3.multiply(1, Quat.getFront(Camera.getOrientation())));

var paintGun = Entities.addEntity({
 type: "Model",
 modelURL: "https://hifi-public.s3.amazonaws.com/eric/models/sprayGun.fbx?=v4",
 position: center,
 dimensions: {
     x: 0.03,
     y: 0.15,
     z: 0.34
 },
 collisionsWillMove: true,
 shapeType: 'box',
 script: scriptURL
});

var whiteboard = Entities.addEntity({
    type: "Box",
    position: center,
    dimensions: {
        x: 2,
        y: 1.5,
        z: .01
    },
    rotation: orientationOf(Vec3.subtract(MyAvatar.position, center)),
    color: {
        red: 250,
        green: 250,
        blue: 250
    },
    // visible: false
});

function cleanup() {
    Entities.deleteEntity(paintGun);
    Entities.deleteEntity(whiteboard);
}


Script.scriptEnding.connect(cleanup);


function orientationOf(vector) {
    var Y_AXIS = {
        x: 0,
        y: 1,
        z: 0
    };
    var X_AXIS = {
        x: 1,
        y: 0,
        z: 0
    };

    var theta = 0.0;

    var RAD_TO_DEG = 180.0 / Math.PI;
    var direction, yaw, pitch;
    direction = Vec3.normalize(vector);
    yaw = Quat.angleAxis(Math.atan2(direction.x, direction.z) * RAD_TO_DEG, Y_AXIS);
    pitch = Quat.angleAxis(Math.asin(-direction.y) * RAD_TO_DEG, X_AXIS);
    return Quat.multiply(yaw, pitch);
}