1154 lines
42 KiB
JavaScript
1154 lines
42 KiB
JavaScript
/* Sorry, this code is pretty damn ugly. I spend 8 hours 5 days a week refactoring code, I just don't feel like making
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* it better right now. Maybe I'll have enough caffiene in my veins and nothing better to do sometime to put this all
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* into ES2015 modules or something.
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*/
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// global vars
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var renderer;
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var stage;
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var screenWidth;
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var screenHeight;
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var counter;
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var totalScreenPixels;
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var connectionDistance;
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var pointShiftDistance;
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var polygon;
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var startPoints;
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var polygonPoints;
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var lastLoop;
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var thisLoop;
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var fps;
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var fpsGraphic;
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var scrollDelta;
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var pointShiftBiasX;
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var pointShiftBiasY;
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var numPoints;
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// global non-configurable vars (modifying these might break stuff)
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var click = null;
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var hover = null;
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var lastHover = null;
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var clickEnd = false;
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var sprites = [];
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var reset = false;
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// global configurable vars
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var resolution = 1; // scaling for PIXI renderer
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var debug = false; // toggles drawing extra indicators for debugging
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var fpsEnabled = debug; // toggles the FPS counter
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var cycleDuration = 60; // length of a point's "cycle": number of frames it takes for it to travel to its chosen destination
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var connectionLimit = 10; // maximum number of lines drawn from one point to others within connection distance
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// colorShiftAmt = 80; // disabled for now
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var disconnectedColorShiftAmt = 10; // when a point is alone (not connected), shift RGB values by this amount every tick
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var allTweeningFns = [ // array of all possible tweening functions, these are defined below
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linearTweening,
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easeInSine,
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easeOutSine,
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easeInOutSine,
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easeInQuad,
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easeOutQuad,
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easeInOutQuad,
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easeInCubic,
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easeOutCubic,
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easeInOutCubic,
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easeInExpo,
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easeOutExpo,
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easeInOutExpo,
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easeInCirc,
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easeOutCirc,
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easeInOutCirc,
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easeOutBounce,
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easeInBounce,
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easeInOutBounce,
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easeInElastic,
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easeOutElastic,
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easeInOutElastic,
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easeInBack,
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easeOutBack,
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easeInOutBack
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];
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// sets of tweening functions that I think look good with points randomly choose from them
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var tweeningSets = { // numbers refer to indicies into the allTweeningsFns array above
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linear: [0],
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meandering: [1, 2, 3, 4, 5, 6, 7, 8, 9],
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snappy: [10, 11, 12, 13, 14, 15],
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bouncy: [16, 17, 18],
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elastic: [19, 20, 21],
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back: [24]
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};
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var tweeningFns = tweeningSets.back; // the actual set of tweening functions points will randomly choose from
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// click effect related config vars
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var clickPullRateStart = 0.01; // initial value for the ratio of a point's distance from the click position to travel in one cycle
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var clickPullRateInc = 0.005; // amount to increase clickPullRate every tick that a click is held
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var clickPullRateMax = 0.5; // maximum value of clickPullRate
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var clickPullRate = clickPullRateStart;
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var clickMaxDistStart = 50; // initial value for the effect radius of a click: points this distance from click position will be pulled (overridden if small screen size)
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var clickMaxDistInc = 2; // amount to increase clickMaxDist every tick that a click is held
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var clickMaxDistMax = 5000; // maximum value of clickMaxDist
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var clickMaxDist = clickMaxDistStart;
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var clickInertiaStart = -0.7; // initial value of the ratio of point's origin distance from the click position to be added to point's new target
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var clickInertia = clickInertiaStart;
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var clickTweeningFnStart = null; // initial value of the specific tweening function to assign to points in effect radius (null will not change functions)
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var clickTweeningFn = clickTweeningFnStart;
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var clickColorShiftAmt = disconnectedColorShiftAmt * 3; // amount of RGB color value to shift for each point in effect radius
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var clickPullRateEnd = -0.5; // value of clickPullRate during tick after end of click (for "rebound" effect)
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var clickInertiaEnd = 0.3; // value of clickInertia during tick after end of click
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var clickTweeningFnEnd = 12; // value of clickTweeningFn during tick after end of click (number refers to index into allTweeningsFns)
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// hover effect related config vars
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var hoverPushRate = -0.05; // ratio of a point's distance from the hover position to travel in one cycle
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var hoverInertia = 0.8; // ratio of a point's origin distance from the click position to be added to point's new target
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var hoverMaxDistStart = 75; // initial value for the effect radius of a hover: points this distance from hover position will be pushed (overridden if small screen size)
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var hoverMaxDistMax = 1000; // maximum value of hoverMaxDist
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var hoverMaxDist = hoverMaxDistStart;
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var hoverTweeningFn = 5; // specific tweening function to assign to points in effect radius
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var zRange = 50; // maximum value for the range of possible z coords for a point
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var nodeImg = 'img/node.png'; // image file location for representing every point
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var nodeImgRes = 100; // resolution of nodeImg file in pixels (aspect ratio should be square)
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// var minNodeDiameter = 3; // minimum pixel size of point on canvas when z coord is 0, maximum is this value plus zRange
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var nodeSize = 3; // with z coord ignored, this value is used for scaling the drawing for each node
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var drawNodes = true; // whether to display circles at each point's current position
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var drawLines = true; // whether to display lines connecting points if they are in connection distance
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var lineSize = 1; // thickness in pixels of drawn lines between points
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/* TWEENING FUNCTIONS */
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// These are modified versions of the jquery easing functions:
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// https://github.com/danro/jquery-easing/blob/master/jquery.easing.js
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// See license in LICENSE-3RD-PARTY.txt
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/* eslint-disable no-unused-vars */
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function linearTweening (t, b, c, d) {
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// t = current time
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// b = start value
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// c = change in value
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// d = duration
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return ((c * t) / d) + b;
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}
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function easeOutBounce (t, b, c, d) {
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if ((t /= d) < (1 / 2.75)) {
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return c * (7.5625 * t * t) + b;
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} else if (t < (2 / 2.75)) {
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return c * (7.5625 * (t -= (1.5 / 2.75)) * t + 0.75) + b;
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} else if (t < (2.5 / 2.75)) {
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return c * (7.5625 * (t -= (2.25 / 2.75)) * t + 0.9375) + b;
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} else {
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return c * (7.5625 * (t -= (2.625 / 2.75)) * t + 0.984375) + b;
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}
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}
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function easeInBounce (t, b, c, d) {
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return c - easeOutBounce(d - t, 0, c, d) + b;
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}
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function easeInOutBounce (t, b, c, d) {
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if (t < d / 2) return easeInBounce(t * 2, 0, c, d) * 0.5 + b;
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return easeOutBounce(t * 2 - d, 0, c, d) * 0.5 + c * 0.5 + b;
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}
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function easeInSine (t, b, c, d) {
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return -c * Math.cos(t / d * (Math.PI / 2)) + c + b;
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}
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function easeOutSine (t, b, c, d) {
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return c * Math.sin(t / d * (Math.PI / 2)) + b;
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}
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function easeInOutSine (t, b, c, d) {
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return -c / 2 * (Math.cos(Math.PI * t / d) - 1) + b;
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}
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function easeInQuad (t, b, c, d) {
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return c * (t /= d) * t + b;
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}
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function easeOutQuad (t, b, c, d) {
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return -c * (t /= d) * (t - 2) + b;
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}
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function easeInOutQuad (t, b, c, d) {
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if ((t /= d / 2) < 1) return c / 2 * t * t + b;
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return -c / 2 * ((--t) * (t - 2) - 1) + b;
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}
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function easeInCubic (t, b, c, d) {
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return c * (t /= d) * t * t + b;
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}
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function easeOutCubic (t, b, c, d) {
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return c * ((t = t / d - 1) * t * t + 1) + b;
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}
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function easeInOutCubic (t, b, c, d) {
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if ((t /= d / 2) < 1) return c / 2 * t * t * t + b;
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return c / 2 * ((t -= 2) * t * t + 2) + b;
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}
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function easeInExpo (t, b, c, d) {
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return (t === 0) ? b : c * Math.pow(2, 10 * (t / d - 1)) + b;
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}
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function easeOutExpo (t, b, c, d) {
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return (t === d) ? b + c : c * (-Math.pow(2, -10 * t / d) + 1) + b;
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}
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function easeInOutExpo (t, b, c, d) {
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if (t === 0) return b;
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if (t === d) return b + c;
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if ((t /= d / 2) < 1) return c / 2 * Math.pow(2, 10 * (t - 1)) + b;
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return c / 2 * (-Math.pow(2, -10 * --t) + 2) + b;
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}
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function easeInElastic (t, b, c, d) {
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var s = 1.70158; var p = 0; var a = c;
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if (t === 0) return b; if ((t /= d) === 1) return b + c; if (!p) p = d * 0.3;
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if (a < Math.abs(c)) { a = c; s = p / 4; } else s = p / (2 * Math.PI) * Math.asin(c / a);
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return -(a * Math.pow(2, 10 * (t -= 1)) * Math.sin((t * d - s) * (2 * Math.PI) / p)) + b;
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}
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function easeOutElastic (t, b, c, d) {
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var s = 1.70158; var p = 0; var a = c;
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if (t === 0) return b; if ((t /= d) === 1) return b + c; if (!p) p = d * 0.3;
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if (a < Math.abs(c)) { a = c; s = p / 4; } else s = p / (2 * Math.PI) * Math.asin(c / a);
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return a * Math.pow(2, -10 * t) * Math.sin((t * d - s) * (2 * Math.PI) / p) + c + b;
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}
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function easeInOutElastic (t, b, c, d) {
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var s = 1.70158; var p = 0; var a = c;
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if (t === 0) return b; if ((t /= d / 2) === 2) return b + c; if (!p) p = d * (0.3 * 1.5);
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if (a < Math.abs(c)) { a = c; s = p / 4; } else s = p / (2 * Math.PI) * Math.asin(c / a);
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if (t < 1) return -0.5 * (a * Math.pow(2, 10 * (t -= 1)) * Math.sin((t * d - s) * (2 * Math.PI) / p)) + b;
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return a * Math.pow(2, -10 * (t -= 1)) * Math.sin((t * d - s) * (2 * Math.PI) / p) * 0.5 + c + b;
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}
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function easeInBack (t, b, c, d, s) {
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if (s === undefined) s = 1.70158;
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return c * (t /= d) * t * ((s + 1) * t - s) + b;
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}
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function easeOutBack (t, b, c, d, s) {
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if (s === undefined) s = 1.70158;
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return c * ((t = t / d - 1) * t * ((s + 1) * t + s) + 1) + b;
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}
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function easeInOutBack (t, b, c, d, s) {
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if (s === undefined) s = 1.70158;
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if ((t /= d / 2) < 1) return c / 2 * (t * t * (((s *= (1.525)) + 1) * t - s)) + b;
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return c / 2 * ((t -= 2) * t * (((s *= (1.525)) + 1) * t + s) + 2) + b;
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}
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function easeInCirc (t, b, c, d) {
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return -c * (Math.sqrt(1 - (t /= d) * t) - 1) + b;
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}
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function easeOutCirc (t, b, c, d) {
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return c * Math.sqrt(1 - (t = t / d - 1) * t) + b;
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}
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function easeInOutCirc (t, b, c, d) {
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if ((t /= d / 2) < 1) return -c / 2 * (Math.sqrt(1 - t * t) - 1) + b;
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return c / 2 * (Math.sqrt(1 - (t -= 2) * t) + 1) + b;
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}
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/* eslint-enable no-unused-vars */
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/* TOGGLE FUNCTIONS */
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function toggleHelp () {
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var help, controls;
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help = document.getElementById('help');
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controls = document.getElementById('controls');
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if (help.style.display === 'none') {
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help.style.display = 'block';
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// hide controls if open (only want one panel open at a time)
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if (controls.style.display === 'block') {
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controls.style.display = 'none';
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}
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} else {
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help.style.display = 'none';
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}
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}
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function toggleControls () {
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var help, controls;
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help = document.getElementById('help');
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controls = document.getElementById('controls');
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if (controls.style.display === 'none') {
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controls.style.display = 'block';
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// hide help if open (only want one panel open at a time)
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if (help.style.display === 'block') {
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help.style.display = 'none';
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}
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} else {
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controls.style.display = 'none';
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}
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}
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function toggleFPS () {
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var fpsCheckbox = document.getElementsByName('fpsCounterToggle')[0];
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if (fpsEnabled) {
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stage.removeChild(fpsGraphic);
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fpsEnabled = false;
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} else {
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stage.addChild(fpsGraphic);
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fpsEnabled = true;
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lastLoop = new Date();
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}
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fpsCheckbox.checked = fpsEnabled;
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}
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function toggleDebug () {
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var fpsCheckbox = document.getElementsByName('fpsCounterToggle')[0];
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var debugCheckbox = document.getElementsByName('debugToggle')[0];
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if (debug) {
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if (fpsEnabled) {
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stage.removeChild(fpsGraphic);
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}
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debug = false;
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fpsEnabled = debug;
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} else {
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if (!fpsEnabled) {
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stage.addChild(fpsGraphic);
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}
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debug = true;
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fpsEnabled = debug;
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lastLoop = new Date();
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}
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fpsCheckbox.checked = fpsEnabled;
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debugCheckbox.checked = debug;
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}
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function toggleNodes () {
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nodesCheckbox = document.getElementsByName('nodesToggle')[0];
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if (drawNodes) {
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for (i = 0; i < sprites.length; i++) {
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sprites[i].visible = false;
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}
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drawNodes = false;
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} else {
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for (i = 0; i < sprites.length; i++) {
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sprites[i].visible = true;
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}
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drawNodes = true;
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}
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nodesCheckbox.checked = drawNodes;
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}
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function toggleLines () {
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linesCheckbox = document.getElementsByName('linesToggle')[0];
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drawLines = !drawLines;
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linesCheckbox.checked = drawLines;
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}
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/* UTILITY FUNCTIONS */
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function randomInt (min, max) {
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// inclusive of min and max
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return Math.floor(Math.random() * (max - min + 1)) + min;
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}
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// from: http://stackoverflow.com/a/5624139
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// modified to return integer literal
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function rgbToHex (color) {
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return parseInt(((1 << 24) + (color.r << 16) + (color.g << 8) + color.b).toString(16).slice(1), 16);
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}
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/* Choose a random RGB color */
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function randomColor () {
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return {
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r: Math.floor(Math.random() * (255 + 1)),
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g: Math.floor(Math.random() * (255 + 1)),
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b: Math.floor(Math.random() * (255 + 1))
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};
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}
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/* Find the average of two RGB colors and return one RGB of that color */
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function averageColor (color1, color2) {
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return {
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r: Math.round((color1.r + color2.r) / 2),
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g: Math.round((color1.g + color2.g) / 2),
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b: Math.round((color1.b + color2.b) / 2)
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};
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}
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/*
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* Find the average of two RGB colors where color1 is weighted against color2 by the given weight.
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* weight is a decimal between 0 and 1.
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*/
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function weightedAverageColor (color1, color2, weight) {
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return {
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r: Math.round(((color1.r * (2 * weight)) + (color2.r * (2 * (1 - weight)))) / 2),
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g: Math.round(((color1.g * (2 * weight)) + (color2.g * (2 * (1 - weight)))) / 2),
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b: Math.round(((color1.b * (2 * weight)) + (color2.b * (2 * (1 - weight)))) / 2)
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};
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}
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/* Darken the color by a factor of 0 to 1, where 1 is black and 0 is white */
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function shadeColor (color, shadeFactor) {
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return {
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r: Math.round(color.r * (1 - shadeFactor)),
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g: Math.round(color.g * (1 - shadeFactor)),
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b: Math.round(color.b * (1 - shadeFactor))
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};
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}
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/* Given a color component (red, green, or blue int), randomly shift by configurable amount */
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function shiftColorComponent (component, maxShiftAmt) {
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var shiftAmt = randomInt(maxShiftAmt * -1, maxShiftAmt);
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var newComponent = component + shiftAmt;
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if ((newComponent < 0) || (newComponent > 255)) {
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newComponent = component - shiftAmt;
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}
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return newComponent;
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}
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/* Randomly shift a RGB color by a configurable amount and return new RGB color */
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function shiftColor (color, maxShiftAmt) {
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return {
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r: shiftColorComponent(color.r, maxShiftAmt),
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g: shiftColorComponent(color.g, maxShiftAmt),
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b: shiftColorComponent(color.b, maxShiftAmt)
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};
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}
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/* from: https://stackoverflow.com/a/17130415 */
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function getMousePos (evt, res) {
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var canvas = document.getElementsByTagName('canvas')[0];
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if (canvas !== undefined) {
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var rect = canvas.getBoundingClientRect();
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return {
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x: Math.round((evt.clientX - rect.left) / (rect.right - rect.left) * canvas.width / res),
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y: Math.round((evt.clientY - rect.top) / (rect.bottom - rect.top) * canvas.height / res)
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};
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}
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}
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function distance (point1, point2) {
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var a = point1[0] - point2[0];
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var b = point1[1] - point2[1];
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return Math.sqrt(a * a + b * b);
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}
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function distancePos (point1, point2) {
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// TODO: refactor distance and distancePos to the same function
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var a = point1.x - point2.x;
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var b = point1.y - point2.y;
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return Math.sqrt(a * a + b * b);
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}
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|
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// eslint-disable-next-line no-unused-vars
|
|
function shiftPointCounter (original, maxShiftAmt) {
|
|
var shiftAmt = randomInt(maxShiftAmt * -1, 0);
|
|
var newCounter = original + shiftAmt;
|
|
if (newCounter < 0) {
|
|
newCounter = cycleDuration + shiftAmt;
|
|
}
|
|
return newCounter;
|
|
}
|
|
|
|
function relativeCounter (counter, targetStart) {
|
|
/* Return current progress of point in its cycle. AKA. what count would be if cycleDuration == targetStart */
|
|
var relCounter = counter - targetStart;
|
|
if (relCounter < 0) {
|
|
return cycleDuration + relCounter;
|
|
}
|
|
return relCounter;
|
|
}
|
|
|
|
function createSprite () {
|
|
return new window.PIXI.Sprite(
|
|
window.PIXI.loader.resources[nodeImg].texture
|
|
);
|
|
}
|
|
|
|
function clearSprites () {
|
|
if (sprites.length > 0) {
|
|
// need to clear out old sprites
|
|
for (i = 0; i < sprites.length; i++) {
|
|
stage.removeChild(sprites[i]);
|
|
}
|
|
sprites = [];
|
|
}
|
|
}
|
|
|
|
/* POINT OPERATION FUNCTIONS */
|
|
|
|
function getRandomPoints (numPoints, maxX, maxY, maxZ, tweeningFns) {
|
|
var i, x, y, z, color, cycleStart, easingFn, sprite;
|
|
var points = [];
|
|
for (i = 0; i < numPoints; i++) {
|
|
x = randomInt(0, maxX - 1);
|
|
y = randomInt(0, maxY - 1);
|
|
// z = randomInt(0, maxZ - 1); // TODO: do something with the 3rd dimension
|
|
z = 0; // turns out that 3D is hard and I am a weak 2D boy
|
|
cycleStart = randomInt(0, cycleDuration - 1);
|
|
color = randomColor();
|
|
easingFn = tweeningFns[Math.floor(Math.random() * tweeningFns.length)];
|
|
// save PIXI Sprite for each point in array
|
|
sprite = createSprite();
|
|
if (!drawNodes) sprite.visible = false;
|
|
sprites.push(sprite);
|
|
stage.addChild(sprite);
|
|
points[i] = [x, y, z, cycleStart, color, easingFn];
|
|
}
|
|
return points;
|
|
}
|
|
|
|
function addOrRemovePoints (numPoints, points) {
|
|
/* Given new value numPoints, remove or add new random points to match new count. */
|
|
var deletedSprites, newPoints;
|
|
if (points.target.length > numPoints) {
|
|
points.original.splice(numPoints - 1);
|
|
points.target.splice(numPoints - 1);
|
|
points.tweened.splice(numPoints - 1);
|
|
deletedSprites = sprites.splice(numPoints - 1);
|
|
for (var i = 0; i < deletedSprites.length; i++) {
|
|
stage.removeChild(deletedSprites[i]);
|
|
}
|
|
} else if (points.target.length < numPoints) {
|
|
newPoints = getRandomPoints(numPoints - points.target.length, screenWidth, screenHeight, zRange, tweeningFns);
|
|
points.original = points.original.concat(newPoints);
|
|
points.target = points.target.concat(JSON.parse(JSON.stringify(newPoints)));
|
|
points.tweened = points.tweened.concat(JSON.parse(JSON.stringify(newPoints)));
|
|
}
|
|
return points;
|
|
}
|
|
|
|
function shiftPoints (points, maxShiftAmt, counter, tweeningFns) {
|
|
var i, shiftX, shiftY, candidateX, candidateY;
|
|
for (i = 0; i < points.original.length; i++) {
|
|
if (points.target[i][3] >= cycleDuration) {
|
|
// cycleDuration was reduced and now this point's cycle is out of bounds. Randomly pick a new valid one.
|
|
points.target[i][3] = randomInt(0, cycleDuration - 1);
|
|
}
|
|
if (points.target[i][3] === counter) {
|
|
points.original[i] = points.target[i].slice();
|
|
shiftX = randomInt(maxShiftAmt * -1, maxShiftAmt);
|
|
shiftY = randomInt(maxShiftAmt * -1, maxShiftAmt);
|
|
if (((shiftX < 0) && (pointShiftBiasX === 1)) || ((shiftX > 0) && (pointShiftBiasX === -1))) {
|
|
shiftX = shiftX * -1;
|
|
}
|
|
if (((shiftY < 0) && (pointShiftBiasY === 1)) || ((shiftY > 0) && (pointShiftBiasY === -1))) {
|
|
shiftY = shiftY * -1;
|
|
}
|
|
candidateX = points.original[i][0] + shiftX;
|
|
candidateY = points.original[i][1] + shiftY;
|
|
if ((candidateX > screenWidth) || (candidateX < 0)) {
|
|
candidateX = points.original[i][0] - shiftX;
|
|
}
|
|
if ((candidateY > screenHeight) || (candidateY < 0)) {
|
|
candidateY = points.original[i][1] - shiftY;
|
|
}
|
|
points.target[i][0] = candidateX;
|
|
points.target[i][1] = candidateY;
|
|
points.target[i][5] = tweeningFns[Math.floor(Math.random() * tweeningFns.length)];
|
|
// FIXME: buggy, makes points jump around too fast
|
|
// points.target[i][3] = shiftPointCounter(points.original[i][3], maxShiftAmt);
|
|
}
|
|
}
|
|
// clear pointShiftBiases now that they have been "used"
|
|
pointShiftBiasX = 0;
|
|
pointShiftBiasY = 0;
|
|
|
|
return points;
|
|
}
|
|
|
|
function pullPoints (points, clickPos, pullRate, inertia, maxDist, counter, resetPoints, tweeningFn) {
|
|
var targetXDiff, targetYDiff, originXDiff, originYDiff;
|
|
for (var i = 0; i < points.target.length; i++) {
|
|
targetXDiff = clickPos.x - points.target[i][0];
|
|
targetYDiff = clickPos.y - points.target[i][1];
|
|
originXDiff = clickPos.x - points.original[i][0];
|
|
originYDiff = clickPos.y - points.original[i][1];
|
|
if (Math.sqrt((targetXDiff * targetXDiff) + (targetYDiff * targetYDiff)) <= maxDist) {
|
|
// point is within effect radius
|
|
if (resetPoints) {
|
|
// Good for changing directions, reset the points original positions to their current positions
|
|
points.original[i][0] = points.tweened[i][0];
|
|
points.original[i][1] = points.tweened[i][1];
|
|
}
|
|
points.target[i][0] += Math.round((targetXDiff + (inertia * originXDiff)) * pullRate); // pull X
|
|
points.target[i][1] += Math.round((targetYDiff + (inertia * originYDiff)) * pullRate); // pull Y
|
|
// shift the color of each point in effect radius by some configurable amount
|
|
points.target[i][4] = shiftColor(points.original[i][4], clickColorShiftAmt);
|
|
if (tweeningFn !== null) {
|
|
// Also switch the tweening function for all affected points for additional effect
|
|
// The tweening function will be re-assigned at the start of the point's next cycle
|
|
points.target[i][4] = tweeningFn;
|
|
}
|
|
if (debug) {
|
|
points.target[i][6] = true; // marks this point as affected
|
|
}
|
|
|
|
// If this point's cycle is near it's end, bump it up some ticks to make the animation smoother
|
|
if (relativeCounter(points.target[i][3]) > Math.roundcycleDuration - 10) {
|
|
points.target[i][3] = (points.target[i][3] + Math.round(cycleDuration / 2)) % cycleDuration;
|
|
}
|
|
} else {
|
|
if (debug) {
|
|
points.target[i][6] = false; // marks this point as unaffected
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
function clearAffectedPoints (points) {
|
|
for (var i = 0; i < points.target.length; i++) {
|
|
points.target[i][6] = false;
|
|
}
|
|
}
|
|
|
|
function redistributeCycles (points, oldCycleDuration, cycleDuration) {
|
|
/* Given old and new cycleDuration, re-assign points' cycle starts that expand/compress to fit the new range in a
|
|
* way that ensures the current progress of the point in its cycle is around the same percentage (so that the point
|
|
* does not jump erratically back or forward in it's current trajectory).
|
|
*/
|
|
// FIXME: if cycleDuration goes to 1 all points' cycles will be compressed to about the same value, and when
|
|
// cycleDuration goes back up, the values will remain the same, making the points appear to dance in sync.
|
|
var progress;
|
|
for (var i = 0; i < points.original.length; i++) {
|
|
progress = points.target[i][3] / oldCycleDuration;
|
|
points.target[i][3] = Math.round(progress * cycleDuration);
|
|
}
|
|
return points;
|
|
}
|
|
|
|
function randomizeCycles (points, cycleDuration) {
|
|
/* Assigns every point a new random cycle start */
|
|
for (var i = 0; i < points.original.length; i++) {
|
|
points.target[i][3] = randomInt(0, cycleDuration - 1);
|
|
}
|
|
return points;
|
|
}
|
|
|
|
function synchronizeCycles (points, cycleDuration) {
|
|
/* Assigns every point the same cycle start (0) */
|
|
for (var i = 0; i < points.original.length; i++) {
|
|
points.target[i][3] = 0;
|
|
}
|
|
return points;
|
|
}
|
|
|
|
/* DRAW FUNCTIONS */
|
|
|
|
function drawPolygon (polygon, points, counter, tweeningFns) {
|
|
var i, j, easingFn, relativeCount, avgColor, shadedColor, connectionCount, dist, connectivity, scale, nodeDiameter;
|
|
// calculate vectors
|
|
for (i = 0; i < points.original.length; i++) {
|
|
easingFn = allTweeningFns[points.target[i][5]];
|
|
relativeCount = relativeCounter(counter, points.target[i][3]);
|
|
points.tweened[i][0] = easingFn(relativeCount, points.original[i][0], points.target[i][0] - points.original[i][0], cycleDuration);
|
|
points.tweened[i][1] = easingFn(relativeCount, points.original[i][1], points.target[i][1] - points.original[i][1], cycleDuration);
|
|
|
|
if (debug) {
|
|
// draw vector trajectories
|
|
if (points.target[i][6]) {
|
|
polygon.lineStyle(1, 0x008b8b, 1); // draw path different color if it is under effect of click/hover
|
|
} else {
|
|
polygon.lineStyle(1, 0x191970, 1);
|
|
}
|
|
polygon.moveTo(points.tweened[i][0], points.tweened[i][1]);
|
|
for (j = relativeCount; j < cycleDuration; j++) {
|
|
polygon.lineTo(
|
|
easingFn(j, points.original[i][0], points.target[i][0] - points.original[i][0], cycleDuration),
|
|
easingFn(j, points.original[i][1], points.target[i][1] - points.original[i][1], cycleDuration)
|
|
);
|
|
}
|
|
}
|
|
}
|
|
// draw lines
|
|
for (i = 0; i < points.original.length; i++) {
|
|
connectionCount = 0;
|
|
for (j = i + 1; j < points.original.length; j++) {
|
|
// TODO pick the N (connectionLimit) closest connections instead of the first N that occur sequentially.
|
|
if (connectionCount >= connectionLimit) break;
|
|
dist = distance(points.tweened[i], points.tweened[j]);
|
|
connectivity = dist / connectionDistance;
|
|
if ((j !== i) && (dist <= connectionDistance)) {
|
|
// find average color of both points
|
|
if ((points.tweened[i][3] === counter) || (points.tweened[j][3] === counter)) {
|
|
// avgColor = shiftColor(avgColor, Math.round(colorShiftAmt * (1 - connectivity)));
|
|
points.tweened[i][4] = weightedAverageColor(points.tweened[i][4], points.tweened[j][4], connectivity);
|
|
points.tweened[j][4] = weightedAverageColor(points.tweened[j][4], points.tweened[i][4], connectivity);
|
|
}
|
|
avgColor = averageColor(points.tweened[i][4], points.tweened[j][4]);
|
|
shadedColor = shadeColor(avgColor, connectivity);
|
|
if (drawLines) {
|
|
polygon.lineStyle(lineSize, rgbToHex(shadedColor), 1);
|
|
polygon.moveTo(points.tweened[i][0], points.tweened[i][1]);
|
|
polygon.lineTo(points.tweened[j][0], points.tweened[j][1]);
|
|
}
|
|
connectionCount = connectionCount + 1;
|
|
}
|
|
}
|
|
|
|
if (connectionCount === 0) {
|
|
points.tweened[i][4] = shiftColor(points.tweened[i][4], disconnectedColorShiftAmt);
|
|
}
|
|
|
|
if (drawNodes) {
|
|
// draw nodes
|
|
nodeDiameter = nodeSize;
|
|
scale = nodeDiameter / nodeImgRes;
|
|
sprites[i].scale.x = scale;
|
|
sprites[i].scale.y = scale;
|
|
sprites[i].x = points.tweened[i][0] - (nodeDiameter / 2);
|
|
sprites[i].y = points.tweened[i][1] - (nodeDiameter / 2);
|
|
sprites[i].tint = rgbToHex(points.tweened[i][4]);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* MAIN LOOP */
|
|
|
|
function loop () {
|
|
screenWidth = window.innerWidth;
|
|
screenHeight = window.innerHeight;
|
|
renderer.resize(screenWidth, screenHeight);
|
|
|
|
polygon.clear();
|
|
|
|
if (reset === true) {
|
|
var newPoints;
|
|
clearSprites();
|
|
newPoints = getRandomPoints(numPoints, screenWidth, screenHeight, zRange, tweeningFns);
|
|
polygonPoints = {
|
|
original: newPoints,
|
|
target: JSON.parse(JSON.stringify(newPoints)),
|
|
tweened: JSON.parse(JSON.stringify(newPoints))
|
|
};
|
|
reset = false;
|
|
}
|
|
|
|
if (click !== null) {
|
|
if (clickEnd) {
|
|
// apply "rebound" effects
|
|
clickPullRate = clickPullRateEnd;
|
|
clickInertia = clickInertiaEnd;
|
|
clickTweeningFn = clickTweeningFnEnd;
|
|
if (debug) {
|
|
// draw debug click effect radius red color when clickEnd == true
|
|
polygon.lineStyle(1, 0xDC143C, 1);
|
|
polygon.drawCircle(click.x, click.y, clickMaxDist);
|
|
}
|
|
} else {
|
|
if (debug) {
|
|
// draw click effect radius blue when debug is on
|
|
polygon.lineStyle(1, 0x483D8B, 1);
|
|
polygon.drawCircle(click.x, click.y, clickMaxDist);
|
|
}
|
|
}
|
|
|
|
// a pointer event is occuring and needs to affect the points in effect radius
|
|
pullPoints(polygonPoints, click, clickPullRate, clickInertia, clickMaxDist, counter, clickEnd, clickTweeningFn);
|
|
|
|
// slightly increase effect amount for next loop if click is still occuring
|
|
if (clickMaxDist <= clickMaxDistMax) {
|
|
clickMaxDist += clickMaxDistInc;
|
|
}
|
|
if (clickPullRate <= clickPullRateMax) {
|
|
clickPullRate += clickPullRateInc;
|
|
}
|
|
|
|
if (clickEnd) {
|
|
// done with rebound effect, re-initialize everything to prepare for next click
|
|
click = null;
|
|
clickEnd = false;
|
|
clickMaxDist = clickMaxDistStart;
|
|
clickPullRate = clickPullRateStart;
|
|
clickInertia = clickInertiaStart;
|
|
clickTweeningFn = clickTweeningFnStart;
|
|
clearAffectedPoints(polygonPoints);
|
|
}
|
|
} else if (hover !== null) {
|
|
if (lastHover !== null) {
|
|
// hover effect radius grows bigger the faster the mouse moves
|
|
hoverMaxDist += Math.min(Math.round(distancePos(hover, lastHover)), hoverMaxDistMax);
|
|
}
|
|
if (debug) {
|
|
// draw hover effect radius yellow when debug is on
|
|
polygon.lineStyle(1, 0xBDB76B, 1);
|
|
polygon.drawCircle(hover.x, hover.y, hoverMaxDist);
|
|
}
|
|
|
|
// a hover event is occuring and needs to affect the points in effect radius
|
|
pullPoints(polygonPoints, hover, hoverPushRate, hoverInertia, hoverMaxDist, counter, false, hoverTweeningFn);
|
|
|
|
hoverMaxDist = hoverMaxDistStart;
|
|
lastHover = hover;
|
|
}
|
|
|
|
// TODO: it would be cool to fill in triangles
|
|
// polygon.beginFill(0x00FF00);
|
|
drawPolygon(polygon, polygonPoints, counter, tweeningFns);
|
|
// polygon.endFill();
|
|
|
|
counter += 1;
|
|
counter = counter % cycleDuration;
|
|
|
|
if (counter === 0 && fpsEnabled) {
|
|
thisLoop = new Date();
|
|
fps = Math.round((1000 / (thisLoop - lastLoop)) * cycleDuration);
|
|
fpsGraphic.setText(fps.toString());
|
|
lastLoop = thisLoop;
|
|
}
|
|
|
|
// points that have reached the end of their cycles need new targets
|
|
polygonPoints = shiftPoints(polygonPoints, pointShiftDistance, counter, tweeningFns);
|
|
|
|
// If user scrolled, modify cycleDuration by amount scrolled
|
|
if (scrollDelta !== 0) {
|
|
var oldCycleDuration = cycleDuration;
|
|
cycleDuration = Math.round(cycleDuration + scrollDelta);
|
|
if (cycleDuration < 1) {
|
|
cycleDuration = 1;
|
|
}
|
|
scrollDelta = 0;
|
|
polygonPoints = redistributeCycles(polygonPoints, oldCycleDuration, cycleDuration);
|
|
|
|
// Update control inputs
|
|
var timeRange = document.getElementsByName('timeRange')[0];
|
|
var timeInput = document.getElementsByName('timeInput')[0];
|
|
timeRange.value = cycleDuration;
|
|
timeInput.value = cycleDuration;
|
|
}
|
|
|
|
// Tell the `renderer` to `render` the `stage`
|
|
renderer.render(stage);
|
|
window.requestAnimationFrame(loop);
|
|
}
|
|
|
|
function registerEventHandlers() {
|
|
var tweeningInputs, debugCheckbox, fpsCheckbox, nodeCheckbox, linesCheckbox;
|
|
tweeningInputs = document.getElementsByName('tweening');
|
|
debugCheckbox = document.getElementsByName('debugToggle')[0];
|
|
fpsCheckbox = document.getElementsByName('fpsCounterToggle')[0];
|
|
nodesCheckbox = document.getElementsByName('nodesToggle')[0];
|
|
linesCheckbox = document.getElementsByName('linesToggle')[0];
|
|
|
|
/* MOUSE AND TOUCH EVENTS */
|
|
|
|
window.addEventListener('wheel', function (e) {
|
|
if (e.target.tagName !== 'CANVAS') return;
|
|
scrollDelta = scrollDelta + e.deltaY;
|
|
});
|
|
|
|
window.addEventListener('touchstart', function (e) {
|
|
if (e.target.tagName !== 'CANVAS') return;
|
|
e.target.focus();
|
|
click = getMousePos(e.changedTouches[0], resolution);
|
|
clickEnd = false;
|
|
});
|
|
|
|
window.addEventListener('touchmove', function (e) {
|
|
if (e.target.tagName !== 'CANVAS') return;
|
|
if (click !== null) {
|
|
click = getMousePos(e.changedTouches[0], resolution);
|
|
}
|
|
});
|
|
|
|
window.addEventListener('touchend', function (e) {
|
|
clickEnd = true;
|
|
});
|
|
|
|
window.addEventListener('touchcancel', function (e) {
|
|
clickEnd = true;
|
|
});
|
|
|
|
window.addEventListener('mousedown', function (e) {
|
|
if (e.target.tagName !== 'CANVAS') return;
|
|
e.target.focus();
|
|
click = getMousePos(e, resolution);
|
|
clickEnd = false;
|
|
});
|
|
|
|
window.addEventListener('mousemove', function (e) {
|
|
if (e.target.tagName !== 'CANVAS') return;
|
|
var pos = getMousePos(e, resolution);
|
|
if (click !== null) {
|
|
click = pos;
|
|
}
|
|
hover = pos;
|
|
});
|
|
|
|
window.addEventListener('mouseup', function (e) {
|
|
clickEnd = true;
|
|
hover = null;
|
|
lastHover = null;
|
|
});
|
|
|
|
window.addEventListener('mouseleave', function (e) {
|
|
clickEnd = true;
|
|
hover = null;
|
|
lastHover = null;
|
|
clearAffectedPoints(polygonPoints);
|
|
});
|
|
|
|
document.addEventListener('mouseleave', function (e) {
|
|
clickEnd = true;
|
|
hover = null;
|
|
lastHover = null;
|
|
clearAffectedPoints(polygonPoints);
|
|
});
|
|
|
|
/* KEYBOARD EVENTS */
|
|
|
|
window.addEventListener('keydown', function (e) {
|
|
var i;
|
|
if (e.target.tagName === 'INPUT') return;
|
|
if (e.keyCode === 37) { // left
|
|
pointShiftBiasX = -1;
|
|
} else if (e.keyCode === 38) { // up
|
|
pointShiftBiasY = -1;
|
|
} else if (e.keyCode === 39) { // right
|
|
pointShiftBiasX = 1;
|
|
} else if (e.keyCode === 40) { // down
|
|
pointShiftBiasY = 1;
|
|
} else if (e.keyCode === 49) { // 1
|
|
tweeningFns = tweeningSets.linear;
|
|
tweeningInputs[0].checked = true;
|
|
} else if (e.keyCode === 50) { // 2
|
|
tweeningFns = tweeningSets.meandering;
|
|
tweeningInputs[1].checked = true;
|
|
} else if (e.keyCode === 51) { // 3
|
|
tweeningFns = tweeningSets.snappy;
|
|
tweeningInputs[2].checked = true;
|
|
} else if (e.keyCode === 52) { // 4
|
|
tweeningFns = tweeningSets.bouncy;
|
|
tweeningInputs[3].checked = true;
|
|
} else if (e.keyCode === 53) { // 5
|
|
tweeningFns = tweeningSets.elastic;
|
|
tweeningInputs[4].checked = true;
|
|
} else if (e.keyCode === 54) { // 6
|
|
tweeningFns = tweeningSets.back;
|
|
tweeningInputs[5].checked = true;
|
|
} else if (e.keyCode === 70) { // f
|
|
toggleFPS();
|
|
} else if (e.keyCode === 68) { // d
|
|
toggleDebug();
|
|
} else if (e.keyCode === 78) { // n
|
|
toggleNodes();
|
|
} else if (e.keyCode === 76) { // l
|
|
toggleLines();
|
|
} else if (e.keyCode === 191) { // ?
|
|
toggleHelp();
|
|
}
|
|
});
|
|
|
|
/* BUTTON & INPUT EVENTS */
|
|
|
|
document.getElementById('toggle-help').addEventListener('click', function () {
|
|
toggleHelp();
|
|
}, false);
|
|
|
|
document.getElementById('toggle-controls').addEventListener('click', function () {
|
|
toggleControls();
|
|
}, false);
|
|
|
|
document.getElementById('close-help').addEventListener('click', function () {
|
|
toggleHelp();
|
|
}, false);
|
|
|
|
document.getElementById('close-controls').addEventListener('click', function () {
|
|
toggleControls();
|
|
}, false);
|
|
|
|
document.getElementById('synchronize-cycles').addEventListener('click', function () {
|
|
synchronizeCycles(polygonPoints, cycleDuration);
|
|
}, false);
|
|
|
|
document.getElementById('randomize-cycles').addEventListener('click', function () {
|
|
randomizeCycles(polygonPoints, cycleDuration);
|
|
}, false);
|
|
|
|
document.getElementById('reset').addEventListener('click', function () {
|
|
reset = true;
|
|
}, false);
|
|
|
|
var connectDistRange = document.getElementsByName('connectDistRange')[0];
|
|
connectDistRange.value = connectionDistance;
|
|
connectDistRange.addEventListener('input', function (e) {
|
|
connectionDistance = parseInt(this.value, 10);
|
|
});
|
|
|
|
var connectDistInput = document.getElementsByName('connectDistInput')[0];
|
|
connectDistInput.value = connectionDistance;
|
|
connectDistInput.addEventListener('input', function (e) {
|
|
connectionDistance = parseInt(this.value, 10);
|
|
});
|
|
|
|
var connectLimitRange = document.getElementsByName('connectLimitRange')[0];
|
|
connectLimitRange.value = connectionLimit;
|
|
connectLimitRange.addEventListener('input', function (e) {
|
|
connectionLimit = parseInt(this.value, 10);
|
|
});
|
|
|
|
var connectLimitInput = document.getElementsByName('connectLimitInput')[0];
|
|
connectLimitInput.value = connectionLimit;
|
|
connectLimitInput.addEventListener('input', function (e) {
|
|
connectionLimit = parseInt(this.value, 10);
|
|
});
|
|
|
|
var pointsNumRange = document.getElementsByName('pointsNumRange')[0];
|
|
pointsNumRange.value = numPoints;
|
|
pointsNumRange.addEventListener('input', function (e) {
|
|
numPoints = parseInt(this.value, 10);
|
|
polygonPoints = addOrRemovePoints(numPoints, polygonPoints);
|
|
});
|
|
|
|
var pointsNumInput = document.getElementsByName('pointsNumInput')[0];
|
|
pointsNumInput.value = numPoints;
|
|
pointsNumInput.addEventListener('input', function (e) {
|
|
numPoints = parseInt(this.value, 10);
|
|
polygonPoints = addOrRemovePoints(numPoints, polygonPoints);
|
|
});
|
|
|
|
var maxTravelRange = document.getElementsByName('maxTravelRange')[0];
|
|
maxTravelRange.value = pointShiftDistance;
|
|
maxTravelRange.addEventListener('input', function (e) {
|
|
pointShiftDistance = parseInt(this.value, 10);
|
|
});
|
|
|
|
var maxTravelInput = document.getElementsByName('maxTravelInput')[0];
|
|
maxTravelInput.value = pointShiftDistance;
|
|
maxTravelInput.addEventListener('input', function (e) {
|
|
pointShiftDistance = parseInt(this.value, 10);
|
|
});
|
|
|
|
var timeRange = document.getElementsByName('timeRange')[0];
|
|
timeRange.value = cycleDuration;
|
|
timeRange.addEventListener('input', function (e) {
|
|
var oldCycleDuration = cycleDuration;
|
|
cycleDuration = parseInt(this.value, 10);
|
|
polygonPoints = redistributeCycles(polygonPoints, oldCycleDuration, cycleDuration);
|
|
});
|
|
|
|
var timeInput = document.getElementsByName('timeInput')[0];
|
|
timeInput.value = cycleDuration;
|
|
timeInput.addEventListener('input', function (e) {
|
|
var oldCycleDuration = cycleDuration;
|
|
if (this.value === '' || this.value === '0') return;
|
|
cycleDuration = parseInt(this.value, 10);
|
|
polygonPoints = redistributeCycles(polygonPoints, oldCycleDuration, cycleDuration);
|
|
});
|
|
|
|
var i;
|
|
for (i = 0; i < tweeningInputs.length; i++) {
|
|
tweeningInputs[i].addEventListener('change', function (e) {
|
|
tweeningFns = tweeningSets[this.value];
|
|
});
|
|
}
|
|
|
|
var pointSizeRange = document.getElementsByName('pointSizeRange')[0];
|
|
pointSizeRange.value = nodeSize;
|
|
pointSizeRange.addEventListener('input', function (e) {
|
|
nodeSize = parseInt(this.value, 10);
|
|
});
|
|
|
|
var pointSizeInput = document.getElementsByName('pointSizeInput')[0];
|
|
pointSizeInput.value = nodeSize;
|
|
pointSizeInput.addEventListener('input', function (e) {
|
|
nodeSize = parseInt(this.value, 10);
|
|
});
|
|
|
|
var lineSizeRange = document.getElementsByName('lineSizeRange')[0];
|
|
lineSizeRange.value = lineSize;
|
|
lineSizeRange.addEventListener('input', function (e) {
|
|
lineSize = parseInt(this.value, 10);
|
|
});
|
|
|
|
var lineSizeInput = document.getElementsByName('lineSizeInput')[0];
|
|
lineSizeInput.value = lineSize;
|
|
lineSizeInput.addEventListener('input', function (e) {
|
|
lineSize = parseInt(this.value, 10);
|
|
});
|
|
|
|
var colorShiftRange = document.getElementsByName('colorShiftRange')[0];
|
|
colorShiftRange.value = disconnectedColorShiftAmt;
|
|
colorShiftRange.addEventListener('input', function (e) {
|
|
disconnectedColorShiftAmt = parseInt(this.value, 10);
|
|
});
|
|
|
|
var colorShiftInput = document.getElementsByName('colorShiftInput')[0];
|
|
colorShiftInput.value = disconnectedColorShiftAmt;
|
|
colorShiftInput.addEventListener('input', function (e) {
|
|
disconnectedColorShiftAmt = parseInt(this.value, 10);
|
|
});
|
|
|
|
|
|
debugCheckbox.addEventListener('change', function (e) {
|
|
toggleDebug();
|
|
});
|
|
|
|
fpsCheckbox.addEventListener('change', function (e) {
|
|
toggleFPS();
|
|
});
|
|
|
|
nodesCheckbox.addEventListener('change', function (e) {
|
|
toggleNodes();
|
|
});
|
|
|
|
linesCheckbox.addEventListener('change', function (e) {
|
|
toggleLines();
|
|
});
|
|
}
|
|
|
|
function loopStart () {
|
|
screenWidth = window.innerWidth;
|
|
screenHeight = window.innerHeight;
|
|
// Create the renderer
|
|
renderer = window.PIXI.autoDetectRenderer(screenWidth, screenHeight, {antialias: true, resolution: resolution});
|
|
|
|
// Add the canvas to the HTML document
|
|
document.body.appendChild(renderer.view);
|
|
|
|
// Create a container object called the `stage`
|
|
stage = new window.PIXI.Container();
|
|
|
|
renderer.view.style.position = 'absolute';
|
|
renderer.view.style.display = 'block';
|
|
renderer.autoResize = true;
|
|
|
|
counter = 0;
|
|
totalScreenPixels = screenWidth + screenHeight;
|
|
connectionDistance = Math.min(Math.round(totalScreenPixels / 16), 75);
|
|
pointShiftDistance = Math.round(totalScreenPixels / 45);
|
|
clickMaxDistStart = Math.min(Math.round(totalScreenPixels / 20), clickMaxDistStart);
|
|
hoverMaxDistStart = Math.min(Math.round(totalScreenPixels / 16), hoverMaxDistStart);
|
|
polygon = new window.PIXI.Graphics();
|
|
stage.addChild(polygon);
|
|
numPoints = Math.round(totalScreenPixels / 6);
|
|
startPoints = getRandomPoints(numPoints, screenWidth, screenHeight, zRange, tweeningFns);
|
|
polygonPoints = {
|
|
original: startPoints,
|
|
target: JSON.parse(JSON.stringify(startPoints)),
|
|
tweened: JSON.parse(JSON.stringify(startPoints))
|
|
};
|
|
|
|
fpsGraphic = new window.PIXI.Text('0', {font: '25px monospace', fill: 'yellow'});
|
|
fpsGraphic.anchor = new window.PIXI.Point(1, 0);
|
|
fpsGraphic.x = screenWidth - 1;
|
|
fpsGraphic.y = 0;
|
|
|
|
if (fpsEnabled) {
|
|
stage.addChild(fpsGraphic);
|
|
}
|
|
|
|
lastLoop = new Date();
|
|
|
|
scrollDelta = 0;
|
|
|
|
// Try to fix bug where click initializes to a bogus value
|
|
click = null;
|
|
hover = null;
|
|
|
|
registerEventHandlers();
|
|
|
|
window.requestAnimationFrame(loop);
|
|
}
|
|
|
|
// Use PIXI loader to load image and then start animation
|
|
window.PIXI.loader
|
|
.add(nodeImg)
|
|
.load(loopStart);
|