Canvas soat: millar
IV qism - Soat millarini chizish
Soatga millar kerak. Soat millarini chizish uchun JavaScript funksiyasini yarating:
JavaScript:
function drawClock() {
drawFace(ctx, radius);
drawNumbers(ctx, radius);
drawTime(ctx, radius);
}
function drawTime(ctx, radius) {
const now = new Date();
let hour = now.getHours();
let minute = now.getMinutes();
let second = now.getSeconds();
//hour
hour = hour%12;
hour = (hour*Math.PI/6)+(minute*Math.PI/(6*60))+(second*Math.PI/(360*60));
drawHand(ctx, hour, radius*0.5, radius*0.07);
//minute
minute = (minute*Math.PI/30)+(second*Math.PI/(30*60));
drawHand(ctx, minute, radius*0.8, radius*0.07);
// second
second = (second*Math.PI/30);
drawHand(ctx, second, radius*0.9, radius*0.02);
}
function drawHand(ctx, pos, length, width) {
ctx.beginPath();
ctx.lineWidth = width;
ctx.lineCap = "round";
ctx.moveTo(0,0);
ctx.rotate(pos);
ctx.lineTo(0, -length);
ctx.stroke();
ctx.rotate(-pos);
}
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Misol izohi
Soat, daqiqa va soniyani olish uchun Date obyektini yarating:
const now = new Date();
let hour = now.getHours();
let minute = now.getMinutes();
let second = now.getSeconds();
Soat milining burchagini hisoblang va uni ma’lum uzunlik (radiusning 50% i) hamda qalinlik (radiusning 7% i) bilan chizing:
hour = hour%12;
hour = (hour*Math.PI/6)+(minute*Math.PI/(6*60))+(second*Math.PI/(360*60));
drawHand(ctx, hour, radius*0.5, radius*0.07);
Daqiqa va soniyalar uchun ham xuddi shu usuldan foydalaning.
drawHand() funksiyasi izoh talab qilmaydi. U shunchaki berilgan uzunlik va qalinlikdagi chiziq chizadi.
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