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index.html
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<!DOCTYPE HTML>
<html>
<head>
<meta charset="UTF-8">
<title>Abacus machine</title>
<style type="text/css">
html {
background: #222;
overflow: hidden;
}
canvas {
position: fixed;
left: 0;
top: 0;
/* border: solid 1px black;*/
}
details {
position: fixed;
background: #ccc;
padding: 0.5em;
border-radius: 1em;
}
table {
border-collapse: collapse;
}
.tablewrap {
overflow-y: auto;
max-height: 80vh;
}
td, th {
padding: 2px;
}
table td:first-child, table th:first-child {
border-right: solid 1px currentColor;
text-align: right;
}
table input {
width: 7em;
}
</style>
</head>
<body>
<details>
<summary></summary>
<button onclick="reset()">reset</button><button onclick="clearvars()">clear</button><button onclick="addvars()">add all</button>
<div class=tablewrap><table><thead><tr><th>Variable</th><th>Value</th></tr></thead><tbody id="vartable" oninput=tableinput(event)></tbody></table></div>
<hr>
<button onclick="step()">step</button><button onclick="run()">run</button><button onclick="quickrun()">quickrun</button><button onclick="gotostart()">to start</button>
</details>
<canvas id=canvas></canvas>
<script>
// ur saying spaggheti can code?!?!?
encode = code => parseInt(code.split('').map(c => "[].,+-<>".indexOf(c)).toReversed().join(''), 8)
/*
{
let bubbleUnique = bubbles.map((bubble,i)=>!bubbles.slice(0,i-1).some(other => other.toString() === bubble.toString()))
for (let i=bubbles.length-1; i>=0; i--)
if (!bubbleUnique[i]) bubbles.splice(i, 1);
}
*/
const canv = document.getElementById('canvas'),
ctx = canv.getContext('2d');
var camerax = 0, cameray = 0, camerascale = 0.5
const bubbles = [], decor = [];
const variables = {};
var lastvarname = "A"
var mousedown = false
document.addEventListener('mousedown', ()=> mousedown = true);
document.addEventListener('mouseup', ()=> mousedown = false);
var selected, active
canv.addEventListener("dblclick", e=>{
let pos = screenToPos(e);
let obj = raycast(pos)
if (obj) {
if (obj === selected)
active = obj;
render();
return
};
selected = new Bubble({
...pos,
text: "x+",
});
if (lastSelected2 instanceof Bubble && e.ctrlKey)
lastSelected2.e = selected;
else if (lastSelected2 instanceof Bubble && e.shiftKey)
lastSelected2.to = selected;
render();
})
var lastSelected, lastSelected2
var selectionrect
var start, last
var lastMousedownPos
canv.addEventListener("mousedown", e=>{
let pos = screenToPos(e);
let obj = raycast(pos);
lastMousedownPos = pos;
if (!obj) {
if (selected instanceof Bubble && e.ctrlKey)
selected.e = null;
if (selected instanceof Bubble && e.shiftKey)
selected.to = null;
lastSelected2 = lastSelected
lastSelected = selected
selected = null;
selectionrect = [pos.x, pos.y]
} else if (obj instanceof Objekto) {
if (selected instanceof Array && selected.includes(obj)) return;
if (selected instanceof Bubble && e.ctrlKey)
selected.e = obj;
else if (selected instanceof Bubble && e.shiftKey)
selected.to = obj;
selected = obj;
}
render()
})
var clipboard
document.addEventListener("paste", e=>{
clipboard = (e.clipboardData || window.clipboardData).getData("text");
})
canv.addEventListener("mouseup", e=>{
if (selectionrect && selectionrect.length === 5 && selectionrect[4]) {
let [x, y, ex, ey] = selectionrect;
if (ex < x) [x, ex] = [ex, x];
if (ey < y) [y, ey] = [ey, y];
const [width, height] = [ex - x, ey - y];
new Box({x,y,width,height});
selected = null;
}
selectionrect = null;
lastMousedownPos = null;
render()
})
const customnames = {};
var breakpoints = new Set();
document.addEventListener("keyup", e=>{
if (selected instanceof Bubble) {
if ("a" <= e.key && e.key <= "z" && !e.ctrlKey) {
lastvarname = selected.var = e.key.toUpperCase();
}
if (e.key === "0")
lastvarname = selected.var = prompt("Enter variable name:") ?? "?";
if ("1" <= e.key && e.key <= "9"){
if (e.ctrlKey || customnames[e.key] == undefined)
customnames[e.key] = prompt("Enter variable name:");
lastvarname = selected.var = customnames[e.key] ?? "?"
}
if (e.key === "+" || e.key === "=")
selected.type = "+";
if (e.key === "-")
selected.type = "-";
if (e.key === "C")
selected.type = "connection"
if (e.key === "A")
selected.type = "anchor"
if (e.key === "T")
selected.type = "text"
if (e.key === "S")
start = selected
if (e.key === "H")
if (breakpoints.has(selected))
breakpoints.delete(selected)
else
breakpoints.add(selected)
if (e.key == ".")
selected.var += "'";
if (e.key == ",")
if (selected.var.endsWith("'"))
selected.var = selected.var.slice(0,-1);
else
selected.var += "'";
render();
}
if (e.key === "Backspace" || e.key === "Delete") {
if (selected === null) return
const selectedArr = (selected instanceof Array ? selected : [selected]).slice(0)
selectedArr.forEach(obj => obj.delete());
render();
}
if (e.key === "c" && e.ctrlKey) navigator.clipboard.writeText(copy(selected));
if (e.key === "v" && e.ctrlKey) paste(clipboard);
if (e.key === "a" && e.ctrlKey) { selected = bubbles.concat(decor); render(); }
if (e.key === "y" && e.ctrlKey) { last = active; render(); }
if ((e.key === "s" || e.key === "e") && e.ctrlKey) window.location.hash = copy(bubbles.concat(decor));
if (e.key === "Shift" && selectionrect && selectionrect.length === 5) { selectionrect[4] = 1; render() }
})
document.addEventListener("keydown", e=>{
if (e.key === "Shift" && selectionrect && selectionrect.length === 5) { selectionrect[4] = 0; render() }
})
function copy(selected = selected) {
if (selected instanceof Bubble) {
navigator.clipboard.writeText(selected.toString());
} else if (selected instanceof Array) {
const data = []
const obj_list = []
selected.forEach(obj=>{
if (obj instanceof Bubble) {
obj_list.push(obj);
data.push([Math.round(obj.x),Math.round(obj.y), obj.var,obj.type]);
} else if (obj instanceof Box)
data.push([obj.x, obj.y, obj.width, obj.height].map(Math.round).concat(obj.color));
})
selected.forEach(obj=>{
if (!(obj instanceof Bubble)) return;
if (obj.e)
data.push([obj_list.indexOf(obj), obj_list.indexOf(obj.e), 0]);
if (obj.to)
data.push([obj_list.indexOf(obj), obj_list.indexOf(obj.to), 1]);
})
return JSON.stringify(data).replaceAll("%", "%25");
}
}
async function paste(text) {
if (/^\(([0-9.]+),([0-9.]+),(.+)([+-])\)$/.test(text)) {
const [_, x, y, variable, type] = text.match(/^\((\d+),(\d+),(.+)([+-])\)$/)
selected = new Bubble({x:+x+70,y,variable,type});
render();
return
}
let objects = JSON.parse(text);
selected = [];
for (let i=0; i<objects.length; i++) {
let obj = objects[i];
if (obj.length === 4) {
selected.push(new Bubble(
{x: obj[0], y: obj[1], variable: obj[2], type: obj[3]}
));
} else if (obj.length === 5) {
selected.push(new Box(
{x: obj[0], y: obj[1], width: obj[2], height: obj[3], color: obj[4]}
));
} else if (obj.length === 3) {
if (obj[2])
selected[obj[0]].to = selected[obj[1]];
else
selected[obj[0]].e = selected[obj[1]];
}
}
render();
}
canv.addEventListener("wheel", e=>{
const new_camerascale = Math.exp(Math.log(camerascale) - (e.deltaY / 1000))
// preserve current mouse coords - logical coords
const x = e.clientX - canv.getBoundingClientRect().x
const y = e.clientY - canv.getBoundingClientRect().y
// currently, mouse is on x/camerascale+camerax.
camerax += x/camerascale - x/new_camerascale
cameray += y/camerascale - y/new_camerascale
camerascale = new_camerascale
render()
})
canv.addEventListener("mousemove", e=>{
if (!mousedown) return;
const pos = screenToPos(e);
if (selectionrect && !e.shiftKey) {
[selectionrect[2], selectionrect[3], selectionrect[4]] = [pos.x, pos.y, +e.ctrlKey];
}
if (selected instanceof Objekto || (selected instanceof Array && selectionrect === null && !e.shiftKey)) {
if (selected instanceof Objekto) {
var wasSingleton = true;
if (e.ctrlKey) {
selected.x = toNearest(selected.x, 10);
selected.y = toNearest(selected.y, 10);
}
selected = [selected]
}
if (e.ctrlKey) {
pos.x = toNearest(pos.x - lastMousedownPos.x, 10) + lastMousedownPos.x
pos.y = toNearest(pos.y - lastMousedownPos.y, 10) + lastMousedownPos.y
}
selected.forEach(obj => {
obj.x = obj.x + pos.x - lastMousedownPos.x;
obj.y = obj.y + pos.y - lastMousedownPos.y;
});
lastMousedownPos = pos;
if (wasSingleton)
selected = selected[0];
}
if (e.shiftKey && selected === null) {
camerax -= pos.x - lastMousedownPos.x
cameray -= pos.y - lastMousedownPos.y
}
render();
})
function toNearest(n, multiple) {
return Math.round(n/multiple)*multiple
}
function screenToPos({x, y}) {
let canvPos = canv.getBoundingClientRect()
return {
x: (x - canvPos.x)/camerascale + camerax,
y: (y - canvPos.y)/camerascale + cameray,
}
}
function posToCanv(x, y, ...rest) {
if (rest.length > 0) return posToCanv(x,y).concat(Array(Math.floor(rest.length/2)).fill(0).flatMap((_,i)=>posToCanv(rest[i*2],rest[i*2+1])))
return [(x - camerax)*camerascale, (y - cameray)*camerascale]
}
function raycast({x, y}) {
for (let i=bubbles.length-1; i>=0; i--)
if (Math.hypot(bubbles[i].x - x, bubbles[i].y - y) <= 20 + 15/camerascale)
return bubbles[i];
for (let i=decor.length-1; i>=0; i--) {
const d = decor[i];
if (nearLine(d.x, d.width, d.y, x, y)
|| nearLine(d.x, d.width, d.y+d.height, x, y)
|| nearLine(d.y, d.height, d.x, y, x)
|| nearLine(d.y, d.height, d.x+d.width, y, x)
)
return d;
}
}
function nearLine(start, length, line_y, position, pos_y) {
return start <= position && position <= start+length && line_y - 15 <= pos_y && pos_y <= line_y + 15
}
class Objekto {
}
class Bubble extends Objekto {
constructor({x, y, variable=lastvarname, type="+"}) {
super();
this.x = +x;
this.y = +y;
this.var = variable;
this.type = type;
bubbles.push(this);
}
delete() {
if (bubbles.includes(this))
bubbles.splice(bubbles.indexOf(this), 1);
bubbles.forEach(bubble=>{
if (bubble.e === this) bubble.e = null;
if (bubble.to === this) bubble.to = null;
})
if (active === this) active = null;
if (selected === this) selected = null;
if (start === this) start = null;
if (selected instanceof Array && selected.includes(this))
selected.splice(selected.indexOf(this), 1);
}
toString() {
return `(${this.x},${this.y},${this.var}${this.type})`
}
}
class Box extends Objekto {
constructor({x, y, width, height, color="white"}) {
super();
this.x = +x;
this.y = +y;
this.width = +width;
this.height = +height;
this.color = color;
decor.push(this);
}
delete() {
if (decor.includes(this))
decor.splice(decor.indexOf(this), 1);
if (active === this) active = null;
if (selected === this) selected = null;
if (start === this) start = null;
if (selected instanceof Array && selected.includes(this))
selected.splice(selected.indexOf(this), 1);
}
toString() {
return `[${this.x},${this.y},${this.width}x${this.height},${this.color}]`
}
}
function resize() {
canvas.width = window.innerWidth;
canvas.height = window.innerHeight;
} resize();
function render() {
resize()
ctx.clearRect(0, 0, 9_000, 9_000);
bubbles.forEach(bubble=>{
if (bubble.to)
drawArc(bubble, bubble.to);
if (bubble.type === "-" && bubble.e)
drawArc(bubble, bubble.e, true);
})
decor.forEach(drawdecor);
bubbles.forEach(drawbubble);
if (selectionrect && selectionrect.length === 5) {
ctx.strokeStyle = selectionrect[4] ? "#f88" : "#888"
ctx.lineWidth = 1 + selectionrect[4]
let [sx, sy, ex, ey] = selectionrect;
if (ex < sx) [sx, ex] = [ex, sx];
if (ey < sy) [sy, ey] = [ey, sy];
ctx.strokeRect(...posToCanv(sx, sy), (ex-sx)*camerascale, (ey-sy)*camerascale);
selected = selectionrect[4] ? []
: bubbles.filter(({x,y}) => sx-15 <= x&&x <= ex+15 && sy-15 <= y&&y <= ey+15)
.concat(decor.filter(({x,y,width,height})=> sx-15 <= x && x+width <= ex+15 && sy-15 <= y && y+height <= ey+15));
}
}
var hideMarkers = false;
function drawbubble(bubble) {
const {x, y} = bubble;
var text = bubble.var+bubble.type;
const pos = posToCanv(x,y)
if (bubble === last) {
ctx.fillStyle = "yellow"
ctx.beginPath();
ctx.arc(pos[0], pos[1], 30*camerascale, 0, 3*Math.PI);
ctx.fill();
}
if (selected && (selected === bubble || (selected.includes && selected.includes(bubble)))) {
ctx.lineWidth = Math.max(5 * camerascale, 3);
ctx.strokeStyle = "#f00";
} else {
ctx.lineWidth = 3 * camerascale;
ctx.strokeStyle = breakpoints.has(bubble) ? "orange" : (bubble.type === "-" ? "#1e7" : "#17e");
}
if (bubble.type === "connection") {
if (bubble === active) return;
ctx.fillStyle = ctx.strokeStyle
ctx.beginPath();
ctx.arc(pos[0], pos[1], 10*camerascale, 0, 3*Math.PI);
ctx.fill();
return
}
if (bubble.type === "anchor") {
if (hideMarkers) return
ctx.beginPath();
ctx.moveTo(pos[0] - 10*camerascale, pos[1] - 10*camerascale)
ctx.lineTo(pos[0] + 10*camerascale, pos[1] + 10*camerascale)
ctx.moveTo(pos[0] + 10*camerascale, pos[1] - 10*camerascale)
ctx.lineTo(pos[0] - 10*camerascale, pos[1] + 10*camerascale)
ctx.stroke();
return
}
ctx.fillStyle = "#333";
if (bubble.type !== "text") {
ctx.beginPath();
ctx.arc(pos[0], pos[1], 30*camerascale, 0, 3*Math.PI);
ctx.fill();
ctx.stroke();
if (bubble === start) {
ctx.beginPath();
ctx.arc(pos[0], pos[1], 37*camerascale, 0, 3*Math.PI);
ctx.stroke();
}
}
if (bubble === last) {
ctx.fillStyle = "yellow"
ctx.beginPath();
ctx.arc(pos[0], pos[1], 30*camerascale, 0, 3*Math.PI);
ctx.fill();
}
if (bubble === active) {
ctx.fillStyle = "#eee";
} else {
ctx.fillStyle = bubble.type === "-" ? "#4fb" : "#4bf";
}
if (bubble.type === "text")
text = bubble.var;
let fontsize = 32
ctx.font = `${fontsize}px Monospace`;
if (ctx.measureText(text).width > 50)
fontsize = 26
if (ctx.measureText(text).width > 80)
fontsize = 20
if (bubble.type === "text") {
fontsize *= 2;
if (bubble == selected || (selected && selected.includes && selected.includes(bubble)))
ctx.fillStyle = "#f88";
}
fontsize *= camerascale
ctx.font = `${fontsize}px Monospace`;
if (bubble.type === "text")
ctx.clearRect(...posToCanv(x-ctx.measureText(text).width/camerascale/2, y-fontsize/camerascale/2-5), (ctx.measureText(text).width+5), fontsize+5)
ctx.strokeStyle = "#333"
ctx.strokeText(text, ...posToCanv(x-ctx.measureText(text).width/camerascale/2, y+fontsize/camerascale/2-5))
ctx.fillText(text, ...posToCanv(x-ctx.measureText(text).width/camerascale/2, y+fontsize/camerascale/2-5))
}
theta = 0.19 * Math.PI
function drawArc(start, end, e=false) {
if (end == null) return;
ctx.strokeStyle = e ? "#faa" : "#fff";
ctx.fillStyle = ctx.strokeStyle;
ctx.lineWidth = 2.5 * camerascale;
if (start.type === "anchor") return;
if (end.type === "anchor" && end.to) {
var a1 = end;
if (a1.to.type === "anchor" && a1.to.to)
var a2 = a1.to;
else
var a2 = a1;
end = a2.to;
}
let length = Math.hypot(end.x-start.x, end.y-start.y),
dx = (end.x-start.x)/length,
dy = (end.y-start.y)/length;
if (a2) {
length = Math.hypot(end.x-a2.x, end.y-a2.y);
dx = (end.x-a2.x)/length;
dy = (end.y-a2.y)/length;
}
ctx.beginPath();
ctx.moveTo(...posToCanv(start.x, start.y));
let r = end.type === "connection" ? 10 : 35
if (a1)
ctx.bezierCurveTo(...posToCanv(a1.x, a1.y, a2.x, a2.y, end.x, end.y));
else
ctx.lineTo(...posToCanv(end.x - dx*r, end.y - dy*r));
ctx.stroke();
if (start === end && !a1) {
dy = -Math.sin(theta)
dx = Math.cos(theta)
ctx.beginPath();
ctx.moveTo(...posToCanv(start.x-25, start.y+15))
ctx.bezierCurveTo(...posToCanv(start.x-85, start.y+70, start.x+70, start.y+70, start.x+25, start.y+5))
ctx.stroke();
}
let scale = end.type === "connection" ? 10 : 31.5;
ctx.beginPath();
ctx.moveTo(...posToCanv(end.x - scale*dx, end.y - scale*dy));
ctx.lineTo(...posToCanv(end.x - (scale+15)*dx +8*dy, end.y - (scale+15)*dy -8*dx));
ctx.lineTo(...posToCanv(end.x - (scale+15)*dx -8*dy, end.y - (scale+15)*dy +8*dx));
ctx.fill();
if (e) {
if (hideMarkers && a2) return;
ctx.fillStyle = "#e72";
ctx.font = `${24*camerascale}px Monospace`;
ctx.fillText("e", ...posToCanv( (start.x+end.x)/2- dy*15 -ctx.measureText("e").width/camerascale/2 , (start.y+end.y)/2 + dx*15 + 5 ) )
}
}
function drawdecor(decoration) {
if (decoration instanceof Box) {
const box = decoration;
ctx.lineWidth = 3 * camerascale;
ctx.strokeStyle = box.color;
if (selected && (selected === box || (selected.includes && selected.includes(box)))) {
ctx.strokeStyle = "red";
ctx.lineWidth = 5 * camerascale;
}
ctx.setLineDash([5,5])
ctx.beginPath();
ctx.moveTo(...posToCanv(box.x, box.y));
ctx.lineTo(...posToCanv(box.x + box.width, box.y));
ctx.lineTo(...posToCanv(box.x + box.width, box.y + box.height));
ctx.lineTo(...posToCanv(box.x, box.y + box.height));
ctx.lineTo(...posToCanv(box.x, box.y));
ctx.stroke();
ctx.setLineDash([])
}
}
function step() {
if (active == null)
return;
variables[active.var] ??= 0;
for (var i=0; i<vartable.rows.length; i++)
if (vartable.rows[i].cells[0].innerText === active.var)
break;
const x = active.var
if (active.type === "+") {
variables[x]++;
active = active.to;
} else if (active.type === "-") {
if (variables[x]) {
variables[x]--;
active = active.to;
} else
active = active.e;
} else
active = active.to;
render();
if (i === vartable.rows.length) {
vartable.insertRow().innerHTML = `<td>${x.replaceAll("<","<")}</td><td><input type=number value=0 min=0 step=1></td>`
}
vartable.rows[i].cells[1].firstElementChild.value = variables[x]
}
var HALT_STEPS = 10_000_000, REFRESH_STEPS = 100_000
async function run() {
var t = 0
while (active != null) {
last = active
if (++t % REFRESH_STEPS === REFRESH_STEPS-1) { render(); writevars(); await new Promise(res=>setTimeout(res,0)) }
if (t === HALT_STEPS) { render(); writevars(); return alert("Halted!"); }
variables[active.var] ??= 0;
if (active.type === "+") {
variables[active.var]++;
active = active.to;
} else if (active.type === "-") {
if (variables[active.var]) {
variables[active.var]--;
active = active.to;
} else
active = active.e;
} else
active = active.to;
if (breakpoints.has(active)) break;
}
render();
writevars();
}
async function quickrun() {
var t = 0
var current_cycle = []
while (active != null) {
last = active
if (current_cycle.includes(active)) {
// optimise cycle
let vars = [];
let mins = [];
let nets = [];
for (const bubble of current_cycle) {
if (!vars.includes(bubble.var)) {
vars.push(bubble.var);
nets.push(0);
mins.push(0);
}
const i = vars.indexOf(bubble.var);
if (bubble.type === "+") nets[i]++;
if (bubble.type === "-") nets[i]--;
mins[i] = Math.min(nets[i], mins[i]);
}
let loops = Infinity;
for (let i=0; i<vars.length; i++)
Math.min(loops, Math.floor((variables[vars[i]]+mins[i])/nets[i]));
for (let i=0; i<vars.length; i++) {
if (mins[i] < -variables[vars[i]]) { loops = 0; break; }
if (nets[i] >= 0) continue;
loops = Math.min(loops, Math.ceil(-(variables[vars[i]]+mins[i])/nets[i]));
}
if (loops === Infinity) return alert("Halted at infinite loop!");
for (let i=0; i<vars.length; i++)
variables[vars[i]] += nets[i] * loops;
current_cycle = [];
}
current_cycle.push(active)
if (++t % REFRESH_STEPS === REFRESH_STEPS-1) { render(); writevars(); await new Promise(res=>setTimeout(res,0)) }
if (t === HALT_STEPS) { render(); writevars(); return alert("Halted!"); }
variables[active.var] ??= 0;
if (active.type === "+") {
variables[active.var]++;
active = active.to;
} else if (active.type === "-") {
if (variables[active.var]) {
variables[active.var]--;
active = active.to;
} else {
current_cycle = []
active = active.e;
}
} else
active = active.to;
if (breakpoints.has(active)) break;
}
render();
writevars();
}
function writevars() {
for (const [varname, value] of Object.entries(variables)) {
for (var i=0; i<vartable.rows.length; i++)
if (vartable.rows[i].cells[0].innerText === varname)
break;
if (i === vartable.rows.length)
vartable.insertRow().innerHTML = `<td>${varname.replaceAll("<","<")}</td><td><input type=number value=0 min=0 step=1></td>`;
vartable.rows[i].cells[1].firstElementChild.value = value;
}
}
if (window.location.hash) {
paste(decodeURI(location.hash.slice(1)));
selected = [];
}
render()
// setInterval(render, 100)
function tableinput(e) {
let n = Number(e.target.value);
if (isNaN(n)) n = e.target.value = 0;
let varname = e.target.parentElement.parentElement.firstChild.innerText;
variables[varname] = n;
}
function clearvars() {
vartable.innerHTML = "";
Object.keys(variables).forEach(varname => delete variables[varname])
}
function addvars() {
[...new Set(bubbles.filter(bubble => "+-".includes(bubble.type)).map(bubble => bubble.var))].toSorted((a,b)=>(a>b)+((b.length==1)-(a.length==1))*2-(b.endsWith("'")-(a.endsWith("'")))*3).forEach(varname=>{
variables[varname] ??= 0;
for (var i=0; i<vartable.rows.length; i++)
if (vartable.rows[i].cells[0].innerText === varname)
break;
if (i === vartable.rows.length)
vartable.insertRow().innerHTML = `<td>${varname.replaceAll("<","<")}</td><td><input type=number value=${variables[varname]} min=0 step=1></td>`;
})
}
function reset() {
Object.keys(variables).forEach(varname => variables[varname] = 0);
[...vartable.rows].forEach(row=>row.cells[1].firstChild.value = 0);
active = start;
render()
}
function gotostart() { active=start; last=null; render(); }
</script>
</body>
</html>