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分享canvas绘制正弦曲线，这种绘制方式怎么理解？
function drawSine(t, unitval, offset, direction) {
// Loop to draw segments
for (let i = yAxis; i <= width; i += 10) {
x = t + (-yAxis + i) / unitval;
y = Math.sin(x) * direction;
context.lineTo(i + offset , (unitval / 3) * y + xAxis);
console.log("x:"+x+"y:"+y);
}
}
// Loop to draw segments
for (let i = yAxis; i <= width; i += 10) {
x = t + (-yAxis + i) / unitval;
y = Math.sin(x) * direction;
context.lineTo(i + offset , (unitval / 3) * y + xAxis);
console.log("x:"+x+"y:"+y);
}
}
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___紫菜 2018-08-24
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