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Шарафиева Юлия #7

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Шарафиева Юлия #7

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98 changes: 98 additions & 0 deletions LSystems.html
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Original file line number Diff line number Diff line change
@@ -0,0 +1,98 @@
<!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, rules) {
this.axiom = axiom;
this.rules = rules;
this.makeNewF = function (n) {
let str = "";
for (var i = 0; i < n; i++) {
str = "";
for (var smb of this.axiom){
if(smb == "F")
str += this.rules;
else
str += smb;
}
this.axiom = str;
}
return this.axiom;
};
}
function Painter(point, lenStep, angle) {
this.p = point;
this.s = lenStep;
this.q = angle;
this.draw = function (string) {
var canvas = document.getElementById("canvas2");
var canvasHeight = parseInt(canvas.getAttribute("height"));
var canvasWidth = parseInt(canvas.getAttribute("width"));
var context = canvas.getContext('2d');
context.lineWidth = "1";
context.strokeStyle = "black";
context.beginPath();
context.moveTo(this.p.x, this.p.y);
var stack = [];
for (var i = 0; i < string.length; i++) {
switch (string.charAt(i)) {
case 'F':
this.p.x += this.s * Math.cos(this.p.a * Math.PI / 180);
this.p.y += this.s * Math.sin(this.p.a * Math.PI / 180);
context.lineTo(this.p.x, this.p.y);
break;
case '+':
this.p.a += this.q;
break;
case '-':
this.p.a -= this.q;
break;
case '[':
stack.push({ x: this.p.x, y: this.p.y, a: this.p.a })
break;
case ']':
var tmp = stack.pop();
this.p.x = tmp.x;
this.p.y = tmp.y;
this.p.a = tmp.a;
context.moveTo(this.p.x, this.p.y);
break;
default:
break;
}
}
context.stroke();
}
}
function run() {
var fractal = prompt ("Введите 1, чтобы нарисовать куст или 2, чтобы нарисовать снежинку ", 1);
if (fractal === "2"){
var n = 3;
var q =60;
var s =2;
var point = { x: 450, y: 450, a: 0 };
var ls = new LSystem("[F]+[F]+[F]+[F]+[F]+[F]", "F F[+FF][-FF]FF[+F][-F]FF");
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Если бы ты использовала let, то переменную ls надо было объявить вне if/else. Это верно, потому что результат используется после. var в JS позволяет тебе написать так, как ты написала, но это плохая часть языка. В 2018 году не надо использовать var в JS.

}
else{
var q = 22.5;
var s = 10;
var point = { x: 450, y: 450, a: 250 };
var ls = new LSystem("F", "-F+F+[+F-F-]-[-F+F+F]");
var n = 4;
}
var alg = ls.makeNewF(n);
var painter = new Painter(point, s, q);
painter.draw(alg);
}
</script>

<body onload="run()">
<canvas height='1000' width='1000' id='canvas2'></canvas>
</body>

</html>
110 changes: 0 additions & 110 deletions index.html
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