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Удалова #5

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Удалова #5

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87 changes: 87 additions & 0 deletions Lsystem.html
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Original file line number Diff line number Diff line change
@@ -0,0 +1,87 @@
<!doctype html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<meta http-equiv="Cache-Control" content="no-cache"/>

<script>
function lSystem(axiom, rule, n) {
let str = "";
for (var i = 0; i < n; i++) {
str = "";
for (var smb of axiom) {
if (smb == "F")
str += rule;
else
str += smb;
}
axiom = str;
}
return axiom;
}

function draw(dataPoint, s, q, newAxiom) {
let canvas = document.getElementById("lsystem");
let canvasHeight = parseInt(canvas.getAttribute("height"));
let canvasWidth = parseInt(canvas.getAttribute("width"));
let context = canvas.getContext('2d');
context.lineWidth = "1";
context.strokeStyle = "0000FF";
let stack = [];
for (let i = 0; i < newAxiom.length; i++) {
switch (newAxiom[i]) {
case "F":
drawLine(context, s, dataPoint);
break;
case "[":
stack.push({x: dataPoint.x, y: dataPoint.y, angle: dataPoint.angle})
break;
case "]":
var tmp = stack.pop();
dataPoint.x = tmp.x;
dataPoint.y = tmp.y;
dataPoint.angle = tmp.angle;
context.moveTo(dataPoint.x, dataPoint.y);
break;
case "+":
dataPoint.angle += q;
break;
case "-":
dataPoint.angle -= q;
break;
}
}
}

function drawLine(context, s, dataPoint) {
context.beginPath();
context.moveTo(dataPoint.x, dataPoint.y);
dataPoint.x += s * Math.cos(dataPoint.angle * Math.PI / 180);
dataPoint.y += s * Math.sin(dataPoint.angle * Math.PI / 180);
context.lineTo(dataPoint.x, dataPoint.y);
context.stroke();
}

function run() {
let fractal = prompt("1-куст,2-снежинка");
if (fractal == "1") {
let q = 180 / 8;
let s = 7;
let dataPoint = {x: 500, y: 500, angle: 0};
let n = 5;
new draw(dataPoint, s, q, lSystem("F", "-F+F+[+F-F-]-[-F+F+F]", n));
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Здесь не нужен new... Это просто вызов функции.

} else {
let q = 180 / 3;
let s = 2;
let n = 3;
let dataPoint = {x: 500, y: 500, angle: 0};
new draw(dataPoint, s, q, lSystem("[F]+[F]+[F]+[F]+[F]+[F]", "F F[+FF][-FF]FF[+F][-F]FF", n));
}
}

</script>
</head>
<body onload="run()">
<canvas height='1000' width='1500' id='lsystem'></canvas>
</body>
</html>