334 lines
12 KiB
JavaScript
334 lines
12 KiB
JavaScript
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class Player {
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constructor(wrapperEl) {
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this.wrapperEl = wrapperEl;
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this.svgEl = document.createElementNS('http://www.w3.org/2000/svg', 'svg');
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this.wrapperEl.appendChild(this.svgEl);
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this.scrubberElOld = document.createElement('input');
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this.scrubberElOld.type = "range";
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this.scrubberElOld.min = 0;
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this.scrubberElOld.step = 0.01;
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this.wrapperEl.appendChild(this.scrubberElOld);
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this.scrubberEl = document.createElement('div');
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this.scrubberEl.classList.add('scrubber')
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this.wrapperEl.appendChild(this.scrubberEl);
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this.scrubberElOld.addEventListener("input", (ev) => {
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this.scrubTo(ev.target.value);
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})
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this.inPointPosition = null;
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this.outPointPosition = null;
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this.currentTime = 0;
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this.isPlaying = false;
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}
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playlist(url) {
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const request = new Request(url, {
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method: 'GET',
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});
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fetch(request)
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.then(response => response.json())
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.then(data => {
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let playlist = this.wrapperEl.querySelector('.playlist');
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if (!playlist) {
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playlist = document.createElement('nav');
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playlist.classList.add('playlist');
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this.wrapperEl.appendChild(playlist)
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}
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else {
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playlist.innerHTML = "";
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}
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const listEl = document.createElement("ul");
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for (let fileUrl of data) {
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const liEl = document.createElement("li");
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liEl.innerText = fileUrl
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liEl.addEventListener('click', (e) => {
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this.play(fileUrl);
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playlist.style.display = "none";
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});
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listEl.appendChild(liEl);
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}
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playlist.appendChild(listEl);
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// do something with the data sent in the request
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});
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}
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play(file) {
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const request = new Request(file, {
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method: 'GET',
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});
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fetch(request)
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.then(response => response.json())
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.then(data => {
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this.playStrokes(data)
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// do something with the data sent in the request
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});
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}
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playStrokes(drawing) {
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this.strokes = drawing.shape;
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this.currentPathI = null;
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this.currentPointI = null;
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this.dimensions = drawing.dimensions;
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this.svgEl.setAttribute('viewBox', `0 0 ${this.dimensions[0]} ${this.dimensions[1]}`)
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this.startTime = window.performance.now() - this.strokes[0].points[0][3];
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this.playStrokePosition(0, 1);
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this.duration = this.getDuration();
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this.scrubberElOld.max = this.duration;
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this.playTimout = null;
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const slider = noUiSlider.create(this.scrubberEl, {
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start: [this.currentTime, this.duration],
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connect: true,
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range: {
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'min': 0,
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'max': this.duration
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}
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});
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slider.on("slide", (values, handle) => {
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this.isPlaying = false;
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// console.log(values, handle);
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// both in and out need to have a value
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this.inPointPosition = this.findPositionForTime(values[0]);
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this.outPointPosition = this.findPositionForTime(values[1]);
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if (handle === 0) {
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// in point
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if (
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this.currentPathI < this.inPointPosition[0] ||
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this.currentPointI < this.inPointPosition[1]) {
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this.drawStrokePosition(
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// this.inPointPosition[0],
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// this.inPointPosition[1],
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// always draw at out position, as to see the whole shape of the range
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this.outPointPosition[0],
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this.outPointPosition[1],
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);
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}
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}
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if (handle === 1) {
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// out point
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// this.outPointPosition = this.findPositionForTime(values[1]);
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this.drawStrokePosition(
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this.outPointPosition[0],
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this.outPointPosition[1],
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);
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}
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// this.inPointPosition = values;
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// this.outPointPosition = vaalues[0];
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// this.scrubTo()
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// this.scrubTo(ev.target.value);
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});
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}
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getDuration() {
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const points = this.strokes[this.strokes.length - 1].points;
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return points[points.length - 1][3];
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}
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getStrokesForPathRange(in_point, out_point) {
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// get paths for given range. Also, split path at in & out if necessary.
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strokes = {};
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for (let i = in_point[0]; i <= out_point[0]; i++) {
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const path = this.strokes[i];
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const in_i = (in_point[0] === i) ? in_point[1] : 0;
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const out_i = (out_point[0] === i) ? out_point[1] : Math.inf;
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const points = path.points.slice(in_i, out_i);
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strokes[i] = points; // preserve indexes
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}
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return strokes;
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}
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// TODO: when drawing, have a group active & inactive.
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// active is getPathRange(currentIn, currentOut)
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// inactive is what comes before and after.
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// then, playing the video is just running pathRanghe(0, playhead)
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drawStrokePosition(path_i, point_i, show_all) {
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if(typeof show_all === 'undefined')
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show_all = false;
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// check if anything is placed that is in the future from the current playhead
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if (this.currentPathI !== null && this.currentPoint !== null) {
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if (this.currentPathI > path_i) {
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console.log('remove', path_i, ' -> ', this.currentPathI)
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// remove everything that comes later
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for (let i = path_i + 1; i <= this.currentPathI; i++) {
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// console.log('remove', i);
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const pathEl = this.svgEl.querySelector(`.path${i}`);
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if (pathEl) {
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pathEl.parentNode.removeChild(pathEl);
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}
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}
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}
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}
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// an inpoint is set, so we're annotating
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// make everything coming before translucent
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if (this.inPointPosition !== null) {
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const [inPath_i, inPoint_i] = this.inPointPosition;
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// returns a static NodeList
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const currentBeforeEls = this.svgEl.querySelectorAll(`.before_in`);
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for (let currentBeforeEl of currentBeforeEls) {
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currentBeforeEl.classList.remove('before_in');
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}
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for (let index = 0; index < inPath_i; index++) {
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const pathEl = this.svgEl.querySelector(`.path${index}`);
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if (pathEl) {
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pathEl.classList.add('before_in');
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}
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}
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}
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this.currentPathI = path_i;
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this.currentPointI = point_i;
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const path = this.strokes[path_i];
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// console.log(path);
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let pathEl = this.svgEl.querySelector(`.path${path_i}`);
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if (!pathEl) {
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pathEl = document.createElementNS('http://www.w3.org/2000/svg', 'path');
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pathEl.style.stroke = path.color;
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pathEl.classList.add('path' + path_i)
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this.svgEl.appendChild(pathEl)
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}
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const stroke = path.points.slice(0, point_i);
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const d = this.strokes2D(stroke);
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pathEl.setAttribute('d', d);
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this.scrubberElOld.value = path.points[point_i][3];
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this.currentTime = path.points[point_i][3];
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}
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getNextPosition(path_i, point_i) {
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const path = this.strokes[path_i];
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let next_path, next_point;
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if (path.points.length > point_i + 1) {
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next_path = path_i;
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next_point = point_i + 1;
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// setTimeout(() => this.playStroke(next_path, next_point), dt);
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} else if (this.strokes.length > path_i + 1) {
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next_path = path_i + 1;
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next_point = 1;
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// use starttime instead of diff, to prevent floating
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} else {
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return [null, null];
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}
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// when an outpoint is set, stop playing there
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if(next_path > this.outPointPosition[0] || next_point > this.outPointPosition[1]){
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return [null, null];
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}
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return [next_path, next_point];
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}
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playStrokePosition(path_i, point_i, allow_interrupt) {
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if(allow_interrupt) {
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if(!this.isPlaying) {
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console.log('not playing because of interrupt');
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return;
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}
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} else{
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this.isPlaying = true;
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}
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this.drawStrokePosition(path_i, point_i);
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const [next_path, next_point] = this.getNextPosition(path_i, point_i);
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if (next_path === null) {
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console.log('done playing');
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return;
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}
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const t = this.strokes[next_path].points[next_point][3];// - path.points[point_i][3];
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const dt = t - (window.performance.now() - this.startTime);
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this.playTimout = setTimeout(() => this.playStrokePosition(next_path, next_point, true), dt);
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}
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playUntil(path_i) {
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// for scrubber
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}
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scrubTo(ms) {
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const [path_i, point_i] = this.findPositionForTime(ms);
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// console.log(path_i, point_i);
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clearTimeout(this.playTimout);
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this.playStrokePosition(path_i, point_i);
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// this.playHead = ms;
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}
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findPositionForTime(ms) {
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ms = Math.min(Math.max(ms, 0), this.duration);
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console.log('scrub to', ms)
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let path_i = 0;
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let point_i = 0;
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this.strokes.every((stroke, index) => {
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const startAt = stroke.points[0][3];
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const endAt = stroke.points[stroke.points.length - 1][3];
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if (startAt > ms) {
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return false; // too far
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}
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if (endAt > ms) {
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// we're getting close. Find the right point_i
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path_i = index;
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stroke.points.every((point, pi) => {
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if (point[3] > ms) {
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// too far
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return false;
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}
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point_i = pi;
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return true;
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});
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return false;
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} else {
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// in case nothings comes after, we store the last best option thus far
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path_i = index;
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point_i = stroke.points.length - 1;
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return true;
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}
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});
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return [path_i, point_i];
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}
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strokes2D(strokes) {
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// strokes to a d attribute for a path
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let d = "";
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let last_stroke = undefined;
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let cmd = "";
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for (let stroke of strokes) {
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if (!last_stroke) {
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d += `M${stroke[0] * this.dimensions[0]},${stroke[1] * this.dimensions[1]} `;
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cmd = 'M';
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} else {
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if (last_stroke[2] == 1) {
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d += " m";
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cmd = 'm';
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} else if (cmd != 'l') {
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d += ' l ';
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cmd = 'l';
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}
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let rel_stroke = [stroke[0] - last_stroke[0], stroke[1] - last_stroke[1]];
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d += `${rel_stroke[0] * this.dimensions[0]},${rel_stroke[1] * this.dimensions[1]} `;
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}
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last_stroke = stroke;
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}
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return d;
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}
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} |