Comments with jqueryToVanilla lines of code, but without change it

This commit is contained in:
GEJ1 2021-02-14 15:53:20 -03:00
parent e2244eecb6
commit 99925639e0

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@ -6,8 +6,7 @@
Contributions from Peter J. Kohler: https://github.com/pjkohler
*/
jsPsych.plugins['virtual-chinrest'] = (function() {
jsPsych.plugins["virtual-chinrest"] = (function () {
var plugin = {};
plugin.info = {
@ -16,190 +15,234 @@ jsPsych.plugins['virtual-chinrest'] = (function() {
resize_units: {
type: jsPsych.plugins.parameterType.STRING,
default: "none",
description: 'What units to resize to? ["none"/"cm"/"inch"/"deg"]. If "none", no resize will be done.'
description:
'What units to resize to? ["none"/"cm"/"inch"/"deg"]. If "none", no resize will be done.',
},
pixels_per_unit: {
type: jsPsych.plugins.parameterType.INT,
pretty_name: 'Pixels per unit',
pretty_name: "Pixels per unit",
default: 100,
description: 'After the scaling factor is applied, this many pixels will equal one unit of measurement.'
description:
"After the scaling factor is applied, this many pixels will equal one unit of measurement.",
},
mouse_adjustment: {
type: jsPsych.plugins.parameterType.BOOL,
pretty_name: 'Adjust Using Mouse?',
default: true
pretty_name: "Adjust Using Mouse?",
default: true,
},
adjustment_prompt: {
type: jsPsych.plugins.parameterType.STRING,
default: '<b> Lets find out how big your monitor is! </b>'+
'<p>Please use any credit card that you have available.<br>' +
'It can also be a grocery store membership card,<br>'+
'your drivers license or anything else of the same format.<br>'+
'<b>Place your card flat onto the screen, and adjust the slider below to match its size.</b></p>'+
'<p>If you do not have access to a real card <br>'+
'you can use a ruler to measure the image width to 3.37 inches or 85.6 mm.<br>',
description: ' Any content here will be displayed above the card stimulus.'
default:
"<b> Lets find out how big your monitor is! </b>" +
"<p>Please use any credit card that you have available.<br>" +
"It can also be a grocery store membership card,<br>" +
"your drivers license or anything else of the same format.<br>" +
"<b>Place your card flat onto the screen, and adjust the slider below to match its size.</b></p>" +
"<p>If you do not have access to a real card <br>" +
"you can use a ruler to measure the image width to 3.37 inches or 85.6 mm.<br>",
description:
" Any content here will be displayed above the card stimulus.",
},
adjustment_button_prompt: {
type: jsPsych.plugins.parameterType.STRING,
default: 'Click here when the card has the right size!',
description: ' Content of the button displayed below the card stimulus.'
default: "Click here when the card has the right size!",
description:
" Content of the button displayed below the card stimulus.",
},
item_path: {
type: jsPsych.plugins.parameterType.STRING,
default: "img/card.png"
default: "img/card.png",
},
item_height_mm: {
type: jsPsych.plugins.parameterType.INT,
pretty_name: 'Item height',
pretty_name: "Item height",
default: 53.98,
description: 'The height of the item to be measured.'
description: "The height of the item to be measured.",
},
item_width_mm: {
type: jsPsych.plugins.parameterType.INT,
pretty_name: 'Item width',
default: 85.60,
description: 'The width of the item to be measured.'
pretty_name: "Item width",
default: 85.6,
description: "The width of the item to be measured.",
},
item_init_size: {
type: jsPsych.plugins.parameterType.INT,
pretty_name: 'Initial Size',
pretty_name: "Initial Size",
default: 250,
description: 'The initial size of the card, in pixels, along the largest dimension.'
description:
"The initial size of the card, in pixels, along the largest dimension.",
},
blindspot_reps: {
type: jsPsych.plugins.parameterType.INT,
pretty_name: 'Blindspot measurement repetitions',
pretty_name: "Blindspot measurement repetitions",
default: 5,
description: 'How many times to measure the blindspot location? If 0, blindspot will not detected and viewing distance not computed.'
description:
"How many times to measure the blindspot location? If 0, blindspot will not detected and viewing distance not computed.",
},
blindspot_prompt: {
type: jsPsych.plugins.parameterType.STRING,
default: '<b>Now, lets quickly test how far away you are sitting.</b>'+
'<p>You might know that vision tests at a doctors practice often involve chinrests.<br>'+
'The doctor basically asks you to sit away from a screen in a specific distance.<br>'+
'We do this here with a “virtual chinrest”.</p><br>'+
'<b>Instructions</b>'+
default:
"<b>Now, lets quickly test how far away you are sitting.</b>" +
"<p>You might know that vision tests at a doctors practice often involve chinrests.<br>" +
"The doctor basically asks you to sit away from a screen in a specific distance.<br>" +
"We do this here with a “virtual chinrest”.</p><br>" +
"<b>Instructions</b>" +
'<div style="text-align: left">' +
'<ol><li>Put your finger on <b>space bar</b> on the keyboard.</li>'+
'<li>Close your right eye. <em>(Tips: it might be easier to cover your right eye by hand!)</em></li>'+
'<li>Using your left eye, focus on the black square.</li>'+
"<ol><li>Put your finger on <b>space bar</b> on the keyboard.</li>" +
"<li>Close your right eye. <em>(Tips: it might be easier to cover your right eye by hand!)</em></li>" +
"<li>Using your left eye, focus on the black square.</li>" +
'<li>Click the button below to start the animation of the red ball. The <b style="color: red">red ball </b>' +
'will disappear as it moves from right to left. Press the “Space” key as soon as the ball disappears from your eye sight.</li>'+
'</div><br> Keep your right eye closed and hit the “Space” key fast!</p><br>'
"will disappear as it moves from right to left. Press the “Space” key as soon as the ball disappears from your eye sight.</li>" +
"</div><br> Keep your right eye closed and hit the “Space” key fast!</p><br>",
},
blindspot_start_prompt: {
type: jsPsych.plugins.parameterType.STRING,
default: 'Start',
description: 'Content of the start button for the blindspot tasks.'
default: "Start",
description: "Content of the start button for the blindspot tasks.",
},
blindspot_done_prompt: {
type: jsPsych.plugins.parameterType.STRING,
default: 'Done',
description: 'Content of the done button for the blindspot tasks.'
default: "Done",
description: "Content of the done button for the blindspot tasks.",
},
blindspot_measurements_prompt: {
type: jsPsych.plugins.parameterType.STRING,
default: 'Remaining measurements: ',
description: 'Text accompanying the remaining measures counter'
default: "Remaining measurements: ",
description: "Text accompanying the remaining measures counter",
},
viewing_distance_report: {
type: jsPsych.plugins.parameterType.STRING,
default: 'Estimated viewing distance (cm):',
description: 'If "none" is given, viewing distance will not be reported to the participant'
}
}
}
default: "Estimated viewing distance (cm):",
description:
'If "none" is given, viewing distance will not be reported to the participant',
},
},
};
// Get screen size
var w = window.innerWidth;
var h = window.innerHeight;
const screen_size_px = []
screen_size_px.push(w)
screen_size_px.push('x')
screen_size_px.push(h)
const screen_size_px = [];
screen_size_px.push(w);
screen_size_px.push("x");
screen_size_px.push(h);
let trial_data = {} // declare trial data as empty so we have access to it across functions
let trial_data = {}; // declare trial data as empty so we have access to it across functions
let config_data = {
"ball_pos": [],
"slider_clck": false
}
ball_pos: [],
slider_clck: false,
};
plugin.trial = function (display_element, trial) {
try {
if ( !( trial.blindspot_reps > 0 ) && ( (trial.resize_units == "deg" ) || (trial.resize_units == "degrees" ) ) ) {
throw Error("Blindspot repetitions set to 0, so resizing to degrees of visual angle is not possible!")
if (
!(trial.blindspot_reps > 0) &&
(trial.resize_units == "deg" || trial.resize_units == "degrees")
) {
throw Error(
"Blindspot repetitions set to 0, so resizing to degrees of visual angle is not possible!"
);
} else {
const start_time = performance.now();
trial_data = {
"item_width_mm": trial.item_width_mm,
"item_height_mm": trial.item_height_mm //card dimension: 85.60 × 53.98 mm (3.370 × 2.125 in)
item_width_mm: trial.item_width_mm,
item_height_mm: trial.item_height_mm, //card dimension: 85.60 × 53.98 mm (3.370 × 2.125 in)
};
let button_str = '<button id=blind_spot class="btn btn-primary">'
let button_str = '<button id=blind_spot class="btn btn-primary">';
if (!(trial.blindspot_reps > 0)) {
button_str = '<button id=proceed class="btn btn-primary">'
button_str = '<button id=proceed class="btn btn-primary">';
}
let report_str = ''
let report_str = "";
if (!(trial.viewing_distance_report == "none")) {
report_str = '<div id="info" style="visibility:hidden">'+
'<b id="info-h">' + trial.viewing_distance_report + ' </b>'+
'</div>'
report_str =
'<div id="info" style="visibility:hidden">' +
'<b id="info-h">' +
trial.viewing_distance_report +
" </b>" +
"</div>";
}
let pagesize_content = '<div id="page-size"><br><br>' + trial.adjustment_prompt
let pagesize_content =
'<div id="page-size"><br><br>' + trial.adjustment_prompt;
// variables to determine div size
let aspect_ratio = 1
let aspect_ratio = 1;
if (trial.mouse_adjustment) {
aspect_ratio = trial.item_width_mm / trial.item_height_mm
const start_div_height = ((aspect_ratio < 1 ) ? trial.item_init_size : Math.round(trial.item_init_size / aspect_ratio));
const start_div_width = ((aspect_ratio < 1 ) ? Math.round(trial.item_init_size * aspect_ratio) : trial.item_init_size );
const adjust_size = Math.round(start_div_width*.1)
aspect_ratio = trial.item_width_mm / trial.item_height_mm;
const start_div_height =
aspect_ratio < 1
? trial.item_init_size
: Math.round(trial.item_init_size / aspect_ratio);
const start_div_width =
aspect_ratio < 1
? Math.round(trial.item_init_size * aspect_ratio)
: trial.item_init_size;
const adjust_size = Math.round(start_div_width * 0.1);
pagesize_content +=
'<br>' + button_str + trial.adjustment_button_prompt + '</button><br>' +
"<br>" +
button_str +
trial.adjustment_button_prompt +
"</button><br>" +
'<div id="item" style="border: none; ' +
'height: '+ start_div_height+'px; width:'+start_div_width+'px; '+
'margin: 5px auto; background-color: none; position: relative; '+
'background-image: url(' + trial.item_path + '); '+
"height: " +
start_div_height +
"px; width:" +
start_div_width +
"px; " +
"margin: 5px auto; background-color: none; position: relative; " +
"background-image: url(" +
trial.item_path +
"); " +
'background-size: 100% auto; background-repeat: no-repeat">' +
'<div id="jspsych-resize-handle" style="cursor: nwse-resize; ' +
'background-color: none; width: ' + adjust_size + 'px; height: ' + adjust_size + 'px; '+
"background-color: none; width: " +
adjust_size +
"px; height: " +
adjust_size +
"px; " +
'border: 5px solid red; border-left: 0; border-top: 0; position: absolute; bottom: 0; right: 0;">' +
'</div>'+
'</div>'+
'</div>'
"</div>" +
"</div>" +
"</div>";
} else {
pagesize_content +=
'<div id="container">' +
'<div id="slider"></div><br>' +
button_str + trial.adjustment_button_prompt + '</button><br><br>'+
'<img id="item" src="' + trial.item_path + '" style="width: 50%">'+
'</div>'+
'</div>'
button_str +
trial.adjustment_button_prompt +
"</button><br><br>" +
'<img id="item" src="' +
trial.item_path +
'" style="width: 50%">' +
"</div>" +
"</div>";
}
const blindspot_content =
'<div id="blind-spot" style="visibility: hidden">' +
trial.blindspot_prompt +
'<div id="svgDiv" style="width:1000px;height:200px;"></div>' +
'<button class="btn btn-primary" id="start_ball">' + trial.blindspot_start_prompt + '</button>'+
'<button class="btn btn-primary" id="proceed" style="display:none">' + trial.blindspot_done_prompt + '</button><br>'+
'<button class="btn btn-primary" id="start_ball">' +
trial.blindspot_start_prompt +
"</button>" +
'<button class="btn btn-primary" id="proceed" style="display:none">' +
trial.blindspot_done_prompt +
"</button><br>" +
`<b> ${trial.blindspot_measurements_prompt} <div id="click" style="display:inline; color: red"> ${trial.blindspot_reps} </div> <b><br>` +
report_str +
'</div>'
"</div>";
display_element.innerHTML =
'<div id="content" style="width: 900px; margin: 0 auto;">' +
pagesize_content +
blindspot_content +
'</div>'
"</div>";
// Event listeners for mouse-based resize
if (trial.mouse_adjustment) {
@ -209,8 +252,8 @@ jsPsych.plugins['virtual-chinrest'] = (function() {
const mouseupevent = function (e) {
dragging = false;
}
display_element.addEventListener('mouseup', mouseupevent);
};
display_element.addEventListener("mouseup", mouseupevent);
const mousedownevent = function (e) {
e.preventDefault();
@ -219,98 +262,120 @@ jsPsych.plugins['virtual-chinrest'] = (function() {
origin_y = e.pageY;
cx = parseInt(scale_div.style.width);
cy = parseInt(scale_div.style.height);
}
display_element.querySelector('#jspsych-resize-handle').addEventListener('mousedown', mousedownevent);
};
display_element
.querySelector("#jspsych-resize-handle")
.addEventListener("mousedown", mousedownevent);
const scale_div = display_element.querySelector('#item');
const scale_div = display_element.querySelector("#item");
function resizeevent(e) {
if (dragging) {
let dx = (e.pageX - origin_x);
let dy = (e.pageY - origin_y);
let dx = e.pageX - origin_x;
let dy = e.pageY - origin_y;
if (Math.abs(dx) >= Math.abs(dy)) {
scale_div.style.width = Math.round(Math.max(20, cx+dx*2)) + "px";
scale_div.style.height = Math.round(Math.max(20, cx+dx*2) / aspect_ratio ) + "px";
scale_div.style.width =
Math.round(Math.max(20, cx + dx * 2)) + "px";
scale_div.style.height =
Math.round(Math.max(20, cx + dx * 2) / aspect_ratio) + "px";
} else {
scale_div.style.height = Math.round(Math.max(20, cy+dy*2)) + "px";
scale_div.style.width = Math.round(aspect_ratio * Math.max(20, cy+dy*2)) + "px";
scale_div.style.height =
Math.round(Math.max(20, cy + dy * 2)) + "px";
scale_div.style.width =
Math.round(aspect_ratio * Math.max(20, cy + dy * 2)) + "px";
}
}
}
display_element.addEventListener('mousemove', resizeevent)
display_element.addEventListener("mousemove", resizeevent);
}
//Event listeners for buttons
if (trial.blindspot_reps > 0) {
display_element.querySelector('#blind_spot').addEventListener('click', function(){
configureBlindSpot()
})
display_element.querySelector('#start_ball').addEventListener('click', function(){
animateBall()
})
display_element
.querySelector("#blind_spot")
.addEventListener("click", function () {
configureBlindSpot();
});
display_element
.querySelector("#start_ball")
.addEventListener("click", function () {
animateBall();
});
} else {
// run the two relevant functions to get item_width_mm and px2mm
distanceSetup.px2mm(get_item_width())
distanceSetup.px2mm(get_item_width());
}
display_element.querySelector('#proceed').addEventListener('click', function(){
display_element
.querySelector("#proceed")
.addEventListener("click", function () {
// finish trial
trial_data.rt = performance.now() - start_time;
display_element.innerHTML = '';
display_element.innerHTML = "";
trial_data.item_width_deg = 2*(Math.atan((trial_data["item_width_mm"]/2)/trial_data["view_dist_mm"])) * 180/Math.PI
trial_data.px2deg = trial_data["item_width_px"] / trial_data.item_width_deg // size of item in pixels divided by size of item in degrees of visual angle
trial_data.item_width_deg =
(2 *
Math.atan(
trial_data["item_width_mm"] / 2 / trial_data["view_dist_mm"]
) *
180) /
Math.PI;
trial_data.px2deg =
trial_data["item_width_px"] / trial_data.item_width_deg; // size of item in pixels divided by size of item in degrees of visual angle
let px2unit_scr = 0
let px2unit_scr = 0;
switch (trial.resize_units) {
case "cm":
case "centimeters":
px2unit_scr = trial_data["px2mm"]*10 // pixels per centimeter
px2unit_scr = trial_data["px2mm"] * 10; // pixels per centimeter
break;
case "inch":
case "inches":
px2unit_scr = trial_data["px2mm"]*25.4 // pixels per inch
px2unit_scr = trial_data["px2mm"] * 25.4; // pixels per inch
break;
case "deg":
case "degrees":
px2unit_scr = trial_data["px2deg"] // pixels per degree of visual angle
px2unit_scr = trial_data["px2deg"]; // pixels per degree of visual angle
break;
}
if (px2unit_scr > 0) {
// scale the window
scale_factor = px2unit_scr / trial.pixels_per_unit;
document.getElementById("jspsych-content").style.transform = "scale(" + scale_factor + ")";
document.getElementById("jspsych-content").style.transform =
"scale(" + scale_factor + ")";
// pixels have been scaled, so pixels per degree, pixels per mm and pixels per item_width needs to be updated
trial_data.px2deg = trial_data.px2deg / scale_factor
trial_data.px2mm = trial_data.px2mm / scale_factor
trial_data.item_width_px = trial_data.item_width_px / scale_factor
trial_data.scale_factor = scale_factor
trial_data.px2deg = trial_data.px2deg / scale_factor;
trial_data.px2mm = trial_data.px2mm / scale_factor;
trial_data.item_width_px =
trial_data.item_width_px / scale_factor;
trial_data.scale_factor = scale_factor;
}
if (trial.blindspot_reps > 0) {
trial_data.win_width_deg = window.innerWidth/trial_data.px2deg
trial_data.win_height_deg = window.innerHeight/trial_data.px2deg
trial_data.win_width_deg = window.innerWidth / trial_data.px2deg;
trial_data.win_height_deg =
window.innerHeight / trial_data.px2deg;
} else {
// delete degree related properties
delete trial_data.px2deg
delete trial_data.item_width_deg
delete trial_data.px2deg;
delete trial_data.item_width_deg;
}
jsPsych.finishTrial(trial_data);
jsPsych.pluginAPI.cancelAllKeyboardResponses();
})
});
}
} catch (e) {
console.error(e)
console.error(e);
}
};
(function ( distanceSetup, $ ) { // jQuery short-hand for $(document).ready(function() { ... });
(function (distanceSetup, $) {
// jQuery short-hand for $(document).ready(function() { ... });
distanceSetup.round = function (value, decimals) {
return Number(Math.round(value+'e'+decimals)+'e-'+decimals);
return Number(Math.round(value + "e" + decimals) + "e-" + decimals);
};
distanceSetup.px2mm = function (item_width_px) {
@ -318,37 +383,37 @@ jsPsych.plugins['virtual-chinrest'] = (function() {
trial_data["px2mm"] = distanceSetup.round(px2mm, 2);
return px2mm;
};
}( window.distanceSetup = window.distanceSetup || {}, jQuery))
})((window.distanceSetup = window.distanceSetup || {}), jQuery);
function get_item_width() {
const item_width_px = $('#item').width();
const item_width_px = $("#item").width();
trial_data["item_width_px"] = distanceSetup.round(item_width_px, 2);
return item_width_px
return item_width_px;
}
function configureBlindSpot() {
drawBall();
$('#page-size').remove();
$('#blind-spot').css({'visibility':'visible'});
$("#page-size").remove(); // jqueryToVanilla: el.parentNode.removeChild(el);
$("#blind-spot").css({ visibility: "visible" }); // jqueryToVanilla: document.getElementById("myP").style.visibility = "hidden";
// $(document).on('keydown', recordPosition);
$(document).on('keydown', recordPosition);
$(document).on("keydown", recordPosition); // jqueryToVanilla: document.addEventListener("keydown", (e) => { /* ... */ });
}
$(function () {
$( "#slider" ).slider({value:"50"});
$("#slider").slider({ value: "50" }); // jqueryToVanilla:
});
$(document).ready(function () {
// jqueryToVanilla: https://stackoverflow.com/questions/799981/document-ready-equivalent-without-jquery
$("#slider").on("slide", function (event, ui) {
const item_width = ui.value + "%";
$("#item").css({"width":item_width});
$("#item").css({ width: item_width });
});
$('#slider').on('slidechange', function(event, ui){
$("#slider").on("slidechange", function (event, ui) {
// jqueryToVanilla: document.addEventListener("keydown", (e) => { /* ... */ });
config_data["slider_clck"] = true;
});
});
//=============================
@ -357,82 +422,86 @@ jsPsych.plugins['virtual-chinrest'] = (function() {
function drawBall(pos = 180) {
// pos: define where the fixation square should be.
var mySVG = SVG("svgDiv");
const item_width_px = get_item_width()
const item_width_px = get_item_width();
const rectX = distanceSetup.px2mm(item_width_px) * pos;
const ballX = rectX*0.6 // define where the ball is
const ballX = rectX * 0.6; // define where the ball is
var ball = mySVG.circle(30).move(ballX, 50).fill("#f00");
window.ball = ball;
var square = mySVG.rect(30, 30).move(Math.min(rectX - 50, 950), 50); //square position
config_data["square_pos"] = distanceSetup.round(square.cx(), 2);
config_data['rectX'] = rectX
config_data['ballX'] = ballX
};
config_data["rectX"] = rectX;
config_data["ballX"] = ballX;
}
function animateBall() {
ball.animate(7000).during(
function(pos){
moveX = - pos*config_data['ballX'];
ball
.animate(7000)
.during(function (pos) {
moveX = -pos * config_data["ballX"];
window.moveX = moveX;
moveY = 0;
ball.attr({transform:"translate("+moveX+","+moveY+")"});
}
).loop(true, false).
after(function(){
ball.attr({ transform: "translate(" + moveX + "," + moveY + ")" }); //jqueryToVanilla: el.getAttribute('');
})
.loop(true, false)
.after(function () {
animateBall();
});
//disable the button after clicked once.
$("#start_ball").attr("disabled", true);
$('#start_ball').css("display", "none");
};
$("#start_ball").attr("disabled", true); // el.getAttribute('');
$("#start_ball").css("display", "none"); // document.querySelector('#start_ball').style.display = 'none';
}
function recordPosition(event, angle = 13.5) {
// angle: define horizontal blind spot entry point position in degrees.
if (event.keyCode == '32') { //Press "Space"
if (event.keyCode == "32") {
//Press "Space"
config_data["ball_pos"].push(distanceSetup.round((ball.cx() + moveX),2));
config_data["ball_pos"].push(distanceSetup.round(ball.cx() + moveX, 2));
var sum = config_data["ball_pos"].reduce((a, b) => a + b, 0);
var ballPosLen = config_data["ball_pos"].length;
config_data["avg_ball_pos"] = distanceSetup.round(sum / ballPosLen, 2);
var ball_sqr_distance = (config_data["square_pos"]-config_data["avg_ball_pos"])/trial_data["px2mm"];
var viewDistance = ball_sqr_distance/Math.radians(angle)
var ball_sqr_distance =
(config_data["square_pos"] - config_data["avg_ball_pos"]) /
trial_data["px2mm"];
var viewDistance = ball_sqr_distance / Math.radians(angle);
trial_data["view_dist_mm"] = distanceSetup.round(viewDistance, 2);
//counter and stop
var counter = Number($('#click').text());
var counter = Number($("#click").text());
counter = counter - 1;
$('#click').text(Math.max(counter, 0));
$("#click").text(Math.max(counter, 0)); // jqueryToVanilla: document.querySelector("#click").textContent = Math.max(counter, 0);
if (counter <= 0) {
ball.stop();
// Disable space key
$('html').bind('keydown', function(e)
{
if (e.keyCode == 32) {return false;}
$("html").bind("keydown", function (e) {
// jqueryToVanilla
if (e.keyCode == 32) {
return false;
}
});
// Display data
$('#info').css("visibility", "visible");
$('#info-h').append(trial_data["view_dist_mm"]/10)
$("#info").css("visibility", "visible"); // jqueryToVanilla: document.querySelector('#info').style.visibility = 'visible';
$("#info-h").append(trial_data["view_dist_mm"] / 10); // jqueryToVanilla(2 lines of code): var element = document.createElement("div");
// document.querySelector(".container").appendChild(element);
$('#proceed').css("display", "inline");
$("#proceed").css("display", "inline"); // jqueryToVanilla: document.querySelector('#info').style.display = 'inline';
return //trial_data.viewing_distance_cm;
return;
}
ball.stop();
animateBall();
}
};
}
//helper function for radians
// Converts from degrees to radians.
Math.radians = function (degrees) {
return degrees * Math.PI / 180;
return (degrees * Math.PI) / 180;
};
return plugin;
})();