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Кандалова Лейла #6

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Кандалова Лейла #6

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64 changes: 60 additions & 4 deletions index.html
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Original file line number Diff line number Diff line change
Expand Up @@ -93,18 +93,74 @@
//выводим путь на экран
context.stroke();
}

function NewTriangle(p, i){
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Название функции не говорящее. Имя функции должно начинаться с глагола

//треть отрезка
var x1 = p[0].x + (p[1].x - p[0].x)/3;
var y1 = p[0].y + (p[1].y - p[0].y)/3;

var y3 = p[0].y + 2 * (p[1].y - p[0].y)/3;
var x3 = p[0].x + 2 * (p[1].x - p[0].x)/3;

//вершина
if (!i){
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Название переменной i обычно используется в циклах. Здесь оно тоже не отражает сути. По факту оно принимает только 2 значения: 0 и 1. Почему тогда не Boolean?

var x2 = (x1 + x3 + (y1- y3)*Math.sqrt(3))/2;
var y2 = (y1+ y3 + (x3 - x1)*Math.sqrt(3))/2;
}
else{
var x2 = (x1 + x3 - (y1- y3)*Math.sqrt(3))/2;
var y2 = (y1 + y3 - (x3 - x1)*Math.sqrt(3))/2;
}
return [{x:x1, y:y1}, {x:x2, y:y2}, {x:x3, y:y3}] ;
}


function Draw(points, n, context,i) {
if (n <= 0) {
context.beginPath();

context.moveTo(points[0].x, points[0].y);
context.lineTo(points[1].x, points[1].y);
context.stroke();
}
else {

var np = NewTriangle(points, i);

Draw([ points[0], np[0] ], n-1, context, i);
Draw([ np[0], np[1] ], n-1, context,i);
Draw([ np[1], np[2] ], n-1, context,i);
Draw([ np[2], points[1], ], n-1, context,i);
}
}

//вызывается после загрузки body
function run () {
example1();
example2();
example3();
var canvas = document.getElementById("canvas2");
var canvasHeight = parseInt(canvas.getAttribute("height"));
var canvasWidth = parseInt(canvas.getAttribute("width"));
var context = canvas.getContext('2d');
//задаем стиль линий
context.lineWidth = "1";
context.strokeStyle = "black";
var x1 = 100;
var y1 = 250;
var x3 = 300;
var y3 = 250;
var x2 = (x1 + x3 - (y1- y3)*Math.sqrt(3))/2;
var y2 = (y1 + y3 - (x3 - x1)*Math.sqrt(3))/2;
var n = 4;

Draw([{x:x1, y:y1}, {x:x3, y:y3}], n, context,0);
Draw([{x:x1, y:y1}, {x:x2, y:y2}], n, context,1);
Draw([{x:x2, y:y2}, {x:x3, y:y3}], n, context,1);
}

</script>

<body onload="run()">
<canvas height='200' width='200' id='canvas1'></canvas>
<canvas height='200' width='200' id='canvas2'></canvas>
<canvas height='1000' width='500' id='canvas2'></canvas>
<canvas height='200' width='200' id='canvas3'></canvas>
</body>
</html>