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Copy pathOffside test.html
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Offside test.html
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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<script src="jquery-3.6.1.min.js"></script>
<script type="text/javascript" src="numeric-1.2.6_stripped.js"></script>
</head>
<body style="overflow: scroll;">
<main style="display: -webkit-inline-box;">
<section style="display: table-caption;">
<input type="file" accept="video/*" />
<button id="gmi" type="button" >Toggle vertical component</button>
<button id="dflip" type="button" >Flip vertical component</button><br>
<button id="cvsTog" type="button">Create/Delete canvas</button><br>
<button id="cRedSw" type="button" style="background: mediumblue !important;">Blue</button><br><br>
Horizontal Distance<br><input id="refDistH" value="" type="number" style="max-width: max-content !important; min-width: 75px !important; line-height: 2ch !important; padding: 2px 0px 2px 4px !important; display: initial !important; visibility: initial !important; background-color: #cf17ff !important; border-width: 0px !important; border-style: outset !important; border-color: black !important; color: white !important;"><br>
<label for="refDistH" id="refDistHLbl"></label><br><br>
Vertical Distance<br><input id="refDistV" value="" type="number" style="max-width: max-content !important; min-width: 75px !important; line-height: 2ch !important; padding: 2px 0px 2px 4px !important; display: initial !important; visibility: initial !important; background-color: black !important; border-width: 0px !important; border-style: outset !important; border-color: black!important; color: white !important;"><br>
<label for="refDistV" id="refDistVLbl"></label><br><br>
Distance between intersections: <br><label id="refDistHVLbl" title="Distance between intersections"></label><br><br>
<input id="lkl" type="checkbox">Auto-straighten plane</input>
</section>
<section class="container">
<video class="video" id="vd1" controls autoPlay></video>
</section>
</main>
<script>
window.onload = function() {
(function localFileVideoPlayerInit(win) {
var URL = win.URL || win.webkitURL,
playSelectedFile = function playSelectedFileInit(event) {
var file = this.files[0];
var type = file.type;
var videoNode = document.querySelector('video');
var fileURL = URL.createObjectURL(file);
videoNode.src = fileURL;
actStart();
},
inputNode = document.querySelector('input');
inputNode.addEventListener('change', playSelectedFile, false);
}(window));
}
function actStart(){
var cntn = document.getElementsByClassName('container')[0];
var OG_cbr=cntn.getBoundingClientRect();
var redSw=document.getElementById('cRedSw');
var rfH=document.getElementById('refDistH');
var rfHLbl=document.getElementById('refDistHLbl');
var rfV=document.getElementById('refDistV');
var rfVLbl=document.getElementById('refDistVLbl');
var rfHVLbl=document.getElementById('refDistHVLbl');
var OG_cbr;
var is_mousedown=false;
var angl = 0;
var angls_h = {
red: null,
blue: null
};
var angls_v = {
red: null,
blue: null
};
var refAngls_h = {
red: null,
blue: null
};
var refAngls_v = {
red: null,
blue: null
};
var p = {
x: 0,
y: 0
};
var currRed=false;
var lastBlue_xy={
x: null,
y: null
};
var lastRed_xy={
x: null,
y: null
};
var vid_dims={
width: null,
height: null
};
var pZoom=window.devicePixelRatio;
var lkln = document.getElementById('lkl');
var scr = 0;
var dfl=false;
var canvas = document.createElement('canvas');
canvas.id = "canvas";
canvas.className = "canvas";
cntn.appendChild(canvas);
var lkln = document.getElementById('lkl');
document.getElementById('gmi').onclick = function() {
gmi();
}
document.getElementById('dflip').onclick = function() {
dfl=!dfl;
switcher();
}
document.getElementById('cvsTog').onclick = function() {
cvsTog();
}
document.getElementById('refDistH').oninput = function() {
switcher();
}
document.getElementById('refDistV').oninput = function() {
switcher();
}
redSw.onclick = function() {
if(currRed){
redSw.style.setProperty('background','mediumblue','important');
}else{
redSw.style.setProperty('background','#f00000','important');
}
redSw.innerText=(currRed)?"Blue":"Red";
currRed=(currRed)?false:true;
}
var vid = $("video#vd1")[0];
var swtch = vid.playbackRate;
var bckw;
var multiKy = 0;
document.onkeydown = function(e) {
if (e.code == "KeyD") {
vid.playbackRate = 0.07;
if (vid.paused) {
vid.play();
}
}
if (e.code == "KeyS") {
multiKy++;
vid.playbackRate = swtch;
if (!vid.paused) {
vid.pause();
}
slwBk();
if (multiKy < 2) {
bckw = setTimeout(slwBk, 100);
} else {
clearTimeout(bckw);
bckw = setTimeout(slwBk, 100);
}
function slwBk() {
vid.currentTime -= 0.007;
console.log('backwards');
}
}
}
document.onkeyup = function(e) {
if (e.code == "KeyD") {
vid.playbackRate = swtch;
if (!vid.paused) {
vid.pause();
}
}
if (e.code == "KeyS") {
clearTimeout(bckw);
multiKy=0;
vid.playbackRate = swtch;
}
}
var d = true;
//console.log(vid);
var theta = 0;
var thetav = 0;
function gmi() {
d=(d)?false:true;
switcher();
}
function cvsTog() {
let tmp_cvs = document.getElementsByTagName('CANVAS');
if (tmp_cvs.length > 0) {
for (i = 0; i < tmp_cvs.length; i++) {
tmp_cvs[i].remove();
}
} else {
actStart();
}
}
function dflip() {
d *= -1;
switcher();
}
var xs = [0];
var ys = [0];
var tdxs = [0];
var tdys = [0];
var canvas = document.getElementById("canvas");
canvas.width = vid.clientWidth;
canvas.height = vid.clientHeight;
vid_dims.width=vid.clientWidth;
vid_dims.height=vid.clientHeight;
var ctx = canvas.getContext('2d');
var canvas1 = document.createElement('canvas');
var ctx1 = canvas1.getContext('2d');
var canvas2 = document.createElement('canvas');
var ctx2 = canvas2.getContext('2d');
var lf=vid.offsetLeft+vid.clientLeft;
var tp=vid.offsetTop+vid.clientTop;
var points = [
[lf+vid.clientWidth * 0.2, tp+vid.clientHeight * 0.8],
[lf+vid.clientWidth * 0.8, tp+vid.clientHeight * 0.8],
[lf+vid.clientWidth * 0.8, tp+vid.clientHeight * 0.2],
[lf+vid.clientWidth * 0.2, tp+vid.clientHeight * 0.2],
[lf+vid.clientWidth * 0.4, tp+vid.clientHeight * 0.2],
[lf+vid.clientWidth * 0.5, tp+vid.clientHeight * 0.6]
];
prepare_lines(ctx2, points);
draw_canvas(ctx, ctx1, ctx2);
var drag = null;
var prx = 15;
function both(p) {
var outH=0;
var outV=0;
prepare_lines(ctx2, points);
draw_canvas(ctx, ctx1, ctx2);
if(currRed){
lastRed_xy.x=p.x;
lastRed_xy.y=p.y;
setupt(p.x, p.y, d,true,false);
setup(p.x, p.y, d,true,false);
if(lastBlue_xy.x!=null){
setupt(lastBlue_xy.x, lastBlue_xy.y, d,false,false);
setup(lastBlue_xy.x, lastBlue_xy.y, d,false,false);
}
}else{
lastBlue_xy.x=p.x;
lastBlue_xy.y=p.y;
setupt(p.x, p.y, d,false,false);
setup(p.x, p.y, d,false,false);
if(lastRed_xy.x!=null){
setupt(lastRed_xy.x, lastRed_xy.y, d,true,false);
setup(lastRed_xy.x, lastRed_xy.y, d,true,false);
}
}
if(!Number.isNaN(rfV.valueAsNumber)){
if(angls_v.red!=null && angls_v.red!=0 && angls_v.blue!=null && angls_v.blue!=0){
setupt(xs[3],ys[3], d,false,true);
setupt(xs[0],ys[0], d,true,true);
let neg=((angls_v.blue-angls_v.red>=Math.PI)||(angls_v.red-angls_v.blue>=0))?true:false;
let diff=(angls_v.blue-angls_v.red>=Math.PI)?Math.abs(2*Math.PI-angls_v.blue+angls_v.red):Math.abs(angls_v.red-angls_v.blue);
let refDiff=Math.abs(refAngls_v.red-refAngls_v.blue);
let diff2=(refDiff==0)?0:rfV.valueAsNumber*(diff/refDiff);
diff2=Math.abs(diff2);
diff2=(neg)?-diff2:diff2;
outV=diff2;
rfVLbl.innerText=diff2.toLocaleString('en-GB', {minimumFractionDigits: 0, maximumFractionDigits: 7, useGrouping: false});
}else if(angls_v.red==0 && angls_v.blue==0){
let a=Math.abs(xs[2]-xs[3]);
let b=lastRed_xy.y-lastBlue_xy.y;
let dist_v=(a==0)?0:b*(rfV.valueAsNumber/a);
outV=dist_v;
rfVLbl.innerText=dist_v.toLocaleString('en-GB', {minimumFractionDigits: 0, maximumFractionDigits: 7, useGrouping: false});
}
}
if(!Number.isNaN(rfH.valueAsNumber)){
if(angls_h.red!=null && angls_h.red!=0 && angls_h.blue!=null && angls_h.blue!=0){
setup(xs[3],ys[3], d,false,true);
setup(xs[2],ys[2], d,true,true);
let neg=((angls_h.blue-angls_h.red>=Math.PI)||(angls_h.red-angls_h.blue>=0))?false:true;
let diff=(angls_h.blue-angls_h.red>=Math.PI)?Math.abs(2*Math.PI-angls_h.blue+angls_h.red):Math.abs(angls_h.red-angls_h.blue);
let refDiff=Math.abs(refAngls_h.red-refAngls_h.blue);
let diff2=(refDiff==0)?0:rfH.valueAsNumber*(diff/refDiff);
diff2=Math.abs(diff2);
diff2=(neg)?-diff2:diff2;
outH=diff2;
rfHLbl.innerText=diff2.toLocaleString('en-GB', {minimumFractionDigits: 0, maximumFractionDigits: 7, useGrouping: false});
}else if(angls_h.red==0 && angls_h.blue==0){
let a=Math.abs(xs[2]-xs[3]);
let b=lastRed_xy.x-lastBlue_xy.x;
let dist_h=(a==0)?0:b*(rfH.valueAsNumber/a);
outH=dist_h;
rfHLbl.innerText=dist_h.toLocaleString('en-GB', {minimumFractionDigits: 0, maximumFractionDigits: 7, useGrouping: false});
}
}
if(!Number.isNaN(rfH.valueAsNumber) && !Number.isNaN(rfV.valueAsNumber)){
rfHVLbl.innerText='('+(Math.sqrt(outH*outH+outV*outV)).toLocaleString('en-GB', {minimumFractionDigits: 0, maximumFractionDigits: 7, useGrouping: false})+')';
}
}
function lit(p) {
prepare_lines(ctx2, points);
draw_canvas(ctx, ctx1, ctx2);
if(currRed){
lastRed_xy.x=p.x;
lastRed_xy.y=p.y;
setupt(p.x, p.y, d,true,false);
if(lastBlue_xy.x!=null){
setupt(lastBlue_xy.x, lastBlue_xy.y, d,false,false);
}
}else{
lastBlue_xy.x=p.x;
lastBlue_xy.y=p.y;
setupt(p.x, p.y, d,false,false);
if(lastRed_xy.x!=null){
setupt(lastRed_xy.x, lastRed_xy.y, d,true,false);
}
}
rfHLbl.innerText="";
rfHVLbl.innerText="";
if(!Number.isNaN(rfV.valueAsNumber)){
if(angls_v.red!=null && angls_v.red!=0 && angls_v.blue!=null && angls_v.blue!=0){
setupt(xs[3],ys[3], d,false,true);
setupt(xs[0],ys[0], d,true,true);
let neg=((angls_v.blue-angls_v.red>=Math.PI)||(angls_v.red-angls_v.blue>=0))?true:false;
let diff=(angls_v.blue-angls_v.red>=Math.PI)?Math.abs(2*Math.PI-angls_v.blue+angls_v.red):Math.abs(angls_v.red-angls_v.blue);
let refDiff=Math.abs(refAngls_v.red-refAngls_v.blue);
let diff2=(refDiff==0)?0:rfV.valueAsNumber*(diff/refDiff);
diff2=Math.abs(diff2);
diff2=(neg)?-diff2:diff2;
rfVLbl.innerText=diff2.toLocaleString('en-GB', {minimumFractionDigits: 0, maximumFractionDigits: 7, useGrouping: false});
}else if(angls_v.red==0 && angls_v.blue==0){
let a=Math.abs(xs[2]-xs[3]);
let b=lastRed_xy.y-lastBlue_xy.y;
let dist_v=(a==0)?0:b*(rfV.valueAsNumber/a);
rfVLbl.innerText=dist_v.toLocaleString('en-GB', {minimumFractionDigits: 0, maximumFractionDigits: 7, useGrouping: false});
}
}
if (lkln.checked == true && scr>1) {
cntn.style.cssText = 'transform: rotate(' + angl + 'rad);';
let cbr=cntn.getBoundingClientRect();
cntn.style.cssText = 'transform: rotate(' + angl + 'rad) translate('+(cbr.left-OG_cbr.left)+'px,'+(cbr.top-OG_cbr.top)+'px);';
}
}
function li(p) {
prepare_lines(ctx2, points);
draw_canvas(ctx, ctx1, ctx2);
if(currRed){
lastRed_xy.x=p.x;
lastRed_xy.y=p.y;
setup(p.x, p.y, d,true,false);
if(lastBlue_xy.x!=null){
setup(lastBlue_xy.x, lastBlue_xy.y, d,false,false);
}
}else{
lastBlue_xy.x=p.x;
lastBlue_xy.y=p.y;
setup(p.x, p.y, d,false,false);
if(lastRed_xy.x!=null){
setup(lastRed_xy.x, lastRed_xy.y, d,true,false);
}
}
rfVLbl.innerText="";
rfHVLbl.innerText="";
if(!Number.isNaN(rfH.valueAsNumber)){
if(angls_h.red!=null && angls_h.red!=0 && angls_h.blue!=null && angls_h.blue!=0){
setup(xs[3],ys[3], d,false,true);
setup(xs[2],ys[2], d,true,true);
let neg=((angls_h.blue-angls_h.red>=Math.PI)||(angls_h.red-angls_h.blue>=0))?false:true;
let diff=(angls_h.blue-angls_h.red>=Math.PI)?Math.abs(2*Math.PI-angls_h.blue+angls_h.red):Math.abs(angls_h.red-angls_h.blue);
let refDiff=Math.abs(refAngls_h.red-refAngls_h.blue);
let diff2=(refDiff==0)?0:rfH.valueAsNumber*(diff/refDiff);
diff2=Math.abs(diff2);
diff2=(neg)?-diff2:diff2;
rfHLbl.innerText=diff2.toLocaleString('en-GB', {minimumFractionDigits: 0, maximumFractionDigits: 7, useGrouping: false});
}else if(angls_h.red==0 && angls_h.blue==0){
let a=Math.abs(xs[2]-xs[3]);
let b=lastRed_xy.x-lastBlue_xy.x;
let dist_h=(a==0)?0:b*(rfH.valueAsNumber/a);
rfHLbl.innerText=dist_h.toLocaleString('en-GB', {minimumFractionDigits: 0, maximumFractionDigits: 7, useGrouping: false});
}
}
if (lkln.checked == true && scr>1) {
cntn.style.cssText = 'transform: rotate(' + angl + 'rad);';
let cbr=cntn.getBoundingClientRect();
cntn.style.cssText = 'transform: rotate(' + angl + 'rad) translate('+(OG_cbr.left-cbr.left)+'px,'+(OG_cbr.top-cbr.top)+'px);';
}
}
function switcher(){
switch (scr) {
case 0:
case 1:
both(p);
break;
case 2:
case 3:
lit(p);
break;
case 4:
case 5:
li(p);
break;
}
}
lkln.oninput = function() {
if (!lkln.checked) {
cntn.style.cssText = '';
} else if (scr>1) {
cntn.style.cssText = 'transform: rotate(' + angl + 'rad);';
let cbr=cntn.getBoundingClientRect();
cntn.style.cssText = 'transform: rotate(' + angl + 'rad) translate('+(OG_cbr.left-cbr.left)+'px,'+(OG_cbr.top-cbr.top)+'px);';
}
switcher();
}
function prp_points(canvas,canvas1,canvas2){
if(vid.clientWidth!==vid_dims.width || vid.clientHeight!==vid_dims.height){
for (let i = 0; i <6; i++) {
points[i][0]=(points[i][0]/vid_dims.width)*vid.clientWidth; //x
points[i][1]=(points[i][1]/vid_dims.height)*vid.clientHeight; //y
}
vid_dims.width=vid.clientWidth;
vid_dims.height=vid.clientHeight;
canvas.width = vid.clientWidth;
canvas.height = vid.clientHeight;
canvas1.width = vid.clientWidth;
canvas1.height = vid.clientHeight;
canvas2.width = vid.clientWidth;
canvas2.height = vid.clientHeight;
}
}
window.addEventListener('resize',(e)=>{
if(window.devicePixelRatio!==pZoom){
prp_points(canvas,canvas1,canvas2);
pZoom=window.devicePixelRatio;
}
});
canvas.addEventListener("mouseleave", function(event) {
document.body.style.setProperty('cursor','');
}, false);
canvas.addEventListener("mouseenter", function(event) {
if(is_mousedown){
document.body.style.setProperty('cursor','none');
}
}, false);
window.addEventListener("mouseup", function(event) {
is_mousedown=false;
document.body.style.setProperty('cursor','');
}, false);
window.addEventListener("mousedown", function(event) {
is_mousedown=true;
if(event.target===canvas){
document.body.style.setProperty('cursor','none');
event.preventDefault();
prp_points(canvas,canvas1,canvas2);
p = get_mouse_position(event);
for (let i = 0; i <4; i++) {
let x = points[i][0];
let y = points[i][1];
xs[i] = points[i][0];
ys[i] = points[i][1];
if (p.x < x + prx && p.x > x - prx && p.y < y + prx && p.y > y - prx) {
drag = i;
}
}
for (let i = 4; i < 6; i++) {
let x = points[i][0];
let y = points[i][1];
tdxs[i - 4] = points[i][0];
tdys[i - 4] = points[i][1];
if (p.x < x + prx && p.x > x - prx && p.y < y + prx && p.y > y - prx) {
drag = i;
}
}
switcher();
}
}, false);
canvas.addEventListener("mousemove", function(event) {
if (event.which == 1) {
p = get_mouse_position(event);
switcher();
}
event.preventDefault();
if (drag != null) {
points[drag][0] = p.x;
points[drag][1] = p.y;
prepare_lines(ctx2, points);
draw_canvas(ctx, ctx1, ctx2);
}
}, false);
canvas.addEventListener("wheel", function(event) {
/* if (event.altKey) {
event.preventDefault();
if (event.deltaY / Math.abs(event.deltaY) < 0) {
gpl();
} else {
gmi();
}
} else */if (event.shiftKey) {
event.preventDefault();
redSw.click();
} else if (!event.ctrlKey) {
event.preventDefault();
//p = get_mouse_position(event);
scr = (scr + (event.deltaY / event.deltaY)) % 6;
switcher();
}
}, );
canvas.addEventListener("mouseup", function(event) {
event.preventDefault();
drag = null;
prepare_lines(ctx2, points);
ctx.drawImage(ctx1.canvas, 0, 0);
ctx.drawImage(ctx2.canvas, 0, 0);
}, false);
canvas.addEventListener("mouseout", function(event) {
event.preventDefault();
drag = null;
}, false);
canvas.addEventListener("mouseenter", function(event) {
event.preventDefault();
drag = null;
}, false);
function prepare_lines(ctx, p) {
ctx.save();
ctx.clearRect(0, 0, ctx.canvas.width, ctx.canvas.height);
ctx.beginPath();
ctx.moveTo(p[0][0], p[0][1]);
ctx.lineTo(p[3][0], p[3][1]);
ctx.closePath();
ctx.strokeStyle = "#cf17ff";
ctx.stroke();
ctx.beginPath();
ctx.moveTo(p[1][0], p[1][1]);
ctx.lineTo(p[2][0], p[2][1]);
ctx.closePath();
ctx.strokeStyle = "#cf17ff";
ctx.stroke();
ctx.beginPath();
ctx.moveTo(p[3][0], p[3][1]);
ctx.lineTo(p[2][0], p[2][1]);
ctx.closePath();
ctx.strokeStyle = "black";
ctx.stroke();
ctx.beginPath();
ctx.moveTo(p[0][0], p[0][1]);
ctx.lineTo(p[1][0], p[1][1]);
ctx.closePath();
ctx.strokeStyle = "black";
ctx.stroke();
for (var i = 0; i <4; i++) {
ctx.strokeStyle =(i===drag)?'#6aff00':'#00ffff';
ctx.beginPath();
ctx.arc(p[i][0], p[i][1], 3, 0, Math.PI * 2, true);
ctx.stroke();
}
ctx.restore();
}
function draw_canvas(ctx, ctx1, ctx2) {
ctx.clearRect(0, 0, ctx.canvas.width, ctx.canvas.height);
ctx.drawImage(ctx1.canvas, 0, 0);
ctx.drawImage(ctx2.canvas, 0, 0);
}
function get_mouse_position(event) {
if (lkln.checked == true) {
cntn.style.cssText = '';
var rect = event.target.getBoundingClientRect();
let o_x = event.clientX - rect.left;
let o_y = event.clientY - rect.top;
if (scr>1) {
cntn.style.cssText = 'transform: rotate(' + angl + 'rad);';
let cbr=cntn.getBoundingClientRect();
cntn.style.cssText = 'transform: rotate(' + angl + 'rad) translate('+(OG_cbr.left-cbr.left)+'px,'+(OG_cbr.top-cbr.top)+'px);';
}
return {
x: o_x,
y: o_y
};
} else {
var rect = event.target.getBoundingClientRect();
return {
x: event.clientX - rect.left,
y: event.clientY - rect.top
};
}
}
var mvrt = 0;
function drawLine(ctx,from,to,colour,w){
try{
ctx.beginPath();
ctx.strokeStyle =colour;
ctx.lineWidth = w;
ctx.moveTo(from.x, from.y);
ctx.lineTo(to.x, to.y);
ctx.stroke();
}catch(e){;}
}
function toBorders(from, to, left, right, top, bottom ){
let x=[from.x,to.x-from.x];
let y=[from.y,to.y-from.y];
let lambda_at={}
if(x[1]===0){
lambda_at.l=null;
lambda_at.r=null;
}else{
let i=1/x[1];
lambda_at.l= (left-x[0])*i;
lambda_at.r= (right-x[0])*i;
}
if(y[1]===0){
lambda_at.t=null;
lambda_at.b=null;
}else{
let i=1/y[1];
lambda_at.t= (top-y[0])*i;
lambda_at.b= (bottom-y[0])*i;
}
let x_at={ // y_at.t = top
t: (lambda_at.t===null)? x[0] : x[0]+ lambda_at.t*x[1],
b: (lambda_at.b===null)? x[0] : x[0]+ lambda_at.b*x[1],
}
let y_at={ // x_at.l = left
l: (lambda_at.l===null)? y[0] : y[0]+ lambda_at.l*y[1],
r: (lambda_at.r===null)? y[0] : y[0]+ lambda_at.r*y[1],
}
let poss=[[x_at.t,top], [x_at.b, bottom], [left, y_at.l], [right, y_at.r]];
let c=0;
let outs=[];
for(let k=0; k<4;++k){
if(poss[k][0]>=left && poss[k][0]<=right && poss[k][1]>=top && poss[k][1]<=bottom){
let p={x:poss[k][0], y: poss[k][1]};
let clsh=(c===1 && outs[0].x===p.x && outs[0].y===p.y)?true:false;
if(c===0 || !clsh){
outs.push(p);
c++;
}
}
if(c==2){
break;
}
}
return outs;
}
function setup(x, y, d,red,refAngl) {
let n=1;
var xy = {
x: x,
y: y
};
var xyq1 = {
x: 0,
y: 0
};
let infn=((xs[3] == xs[0]) && (xs[2] == xs[1]))?true:false;
if ((xs[3] == xs[0]) && (xs[2] != xs[1])) {
xyq1.x = xs[0];
xyq1.y = ys[1] + ((xs[0] - xs[1]) / (xs[1] - xs[2])) * (ys[1] - ys[2]);
} else if ((xs[3] != xs[0]) && (xs[2] == xs[1])) {
xyq1.x = xs[1];
xyq1.y = ys[0] + ((xs[1] - xs[0]) / (xs[0] - xs[3])) * (ys[0] - ys[3]);
} else if (!infn) {
var m1 = (ys[3] - ys[0]) / (xs[3] - xs[0]);
var m2 = (ys[2] - ys[1]) / (xs[2] - xs[1]);
var mvrt = (tdys[1] - tdys[0]) / (tdxs[1] - tdxs[0]);
var A = numeric.rep([2, n + 1], 1);
A = [
[1, -1],
[m1, -m2]
];
var res = [
[xs[2] - xs[0]],
[ys[2] - ys[0]]
];
var g12 = numeric.solve(A, res);
var xq1 = xs[0] + g12[0];
var yq1 = ys[0] + g12[0] * m1;
xyq1.x = xq1;
xyq1.y = yq1;
}
if(infn){
xyq1.x=x;
xyq1.y=0;
}
let angls=[0,0];
let ss=(red)?"#f00000": "mediumblue";
if(!infn){
var dp = -(x - xyq1.x) / Math.abs(x - xyq1.x);
let td={};
//td.x = Math.cos(dp) * (x - xyq1.x) - Math.sin(dp) * (y - xyq1.y) + xyq1.x;
td.y = Math.sin(dp) * (x - xyq1.x) + Math.cos(dp) * (y - xyq1.y) + xyq1.y;
let angl_h = Math.atan2(y- xyq1.y, xyq1.x-x);
angls[0]=angl_h;
angls[1]=angl_h-0.5*Math.PI;
if(!refAngl){
let extendedPoints = toBorders(xyq1, xy, 0, canvas.clientWidth,0 ,canvas.clientHeight);
drawLine(ctx,extendedPoints[0],extendedPoints[1],ss,0.7);
if(d){
let extendedPointsV=toBorders( {x:x, y:td.y},xy, 0, canvas.clientWidth,0 ,canvas.clientHeight);
if(dfl){
drawLine(ctx,xy,extendedPointsV[1],ss,0.7);
}else{
drawLine(ctx,xy,extendedPointsV[0],ss,0.7);
}
}
}
}else{
drawLine(ctx,{x:x,y:0},{x:x,y:canvas.clientHeight},ss,0.7);
if((scr===4 || scr===5) && d){
if(dfl){
drawLine(ctx,{x:x,y:y},{x:canvas.clientWidth,y:y},ss,0.7);
}else{
drawLine(ctx,{x:0,y:y},{x:x,y:y},ss,0.7);
}
}
}
if(refAngl){
if(red){
refAngls_h.red=angls[0];
}else{
refAngls_h.blue=angls[0];
}
}else{
if(red){
angls_h.red=angls[0];
}else{
angls_h.blue=angls[0];
}
if(red==currRed){
angl=angls[1];
}
}
}
function setupt(x, y, d,red,refAngl) {
var n = 1;
var xst = [0];
var yst = [0];
xst[0] = xs[1];
xst[1] = xs[3];
xst[2] = xs[2];
xst[3] = xs[0];
yst[0] = ys[1];
yst[1] = ys[3];
yst[2] = ys[2];
yst[3] = ys[0];
var xy = {
x: x,
y: y
};
var xyq1 = {
x: 0,
y: 0
};
let infn=((xst[3] == xst[1]) && (xst[2] == xst[0]))?true:false;
if (!infn){
var m1 = (yst[3] - yst[0]) / (xst[3] - xst[0]);
var m2 = (yst[2] - yst[1]) / (xst[2] - xst[1]);
var mvrt = (tdys[1] - tdys[0]) / (tdxs[1] - tdxs[0]);
var A = numeric.rep([2, n + 1], 1);
A = [
[1, -1],
[m1, -m2]
];
var res = [
[xst[2] - xst[0]],
[yst[2] - yst[0]]
];
var g12 = numeric.solve(A, res);
var xq1 = xst[0] + g12[0];
var yq1 = yst[0] + g12[0] * m1;
xyq1.x = xq1;
xyq1.y = yq1;
}
if(infn){
xyq1.x=0;
xyq1.y=y;
}
let angls=[0,0];
let ss=(red)?"#f00000": "mediumblue";
if(!infn){
var dp = -(x - xyq1.x) / Math.abs(x - xyq1.x);
let td={};
//td.x = Math.cos(dp) * (x - xyq1.x) - Math.sin(dp) * (y - xyq1.y) + xyq1.x;
td.y = Math.sin(dp) * (x - xyq1.x) + Math.cos(dp) * (y - xyq1.y) + xyq1.y;
let angl_v = Math.atan2(y- xyq1.y, xyq1.x-x);
angls[0]=angl_v;
angls[1]=angl_v-0.5*Math.PI;
if(!refAngl){
let extendedPoints = toBorders(xyq1, xy, 0, canvas.clientWidth,0 ,canvas.clientHeight);
drawLine(ctx,extendedPoints[0],extendedPoints[1],ss,0.7);
if(d && (scr===2 || scr===3)){
let extendedPointsV=toBorders( {x:x, y:td.y},xy, 0, canvas.clientWidth,0 ,canvas.clientHeight);
if(dfl){
drawLine(ctx,xy,extendedPointsV[1],ss,0.7);
}else{
drawLine(ctx,xy,extendedPointsV[0],ss,0.7);
}
}
}
}else{
drawLine(ctx,{x:0,y:y},{x:canvas.clientWidth,y:y},ss,0.7);
if((scr===2 || scr===3) && d){
if(dfl){
drawLine(ctx,{x:x,y:y},{x:x,y:canvas.clientHeight},ss,0.7);
}else{
drawLine(ctx,{x:x,y:y},{x:x,y:0},ss,0.7);
}
}
}
if(refAngl){
if(red){
refAngls_v.red=angls[0];
}else{
refAngls_v.blue=angls[0];
}
}else{
if(red){
angls_v.red=angls[0];
}else{
angls_v.blue=angls[0];
}
if(red==currRed){
angl=angls[1];
}
}
}
}
</script>
<style>
.container {
margin: 1.4em auto;
position: relative;
}
.video {
width: 100%;
height: auto;
position: static;
top: 0;
left: 0;
}
.canvas {
position: absolute;
top: 0;
left: 0;
background-color: rgba(0, 255, 0, 0);
}
button{