({ nowRange, } = {})

()

(ctx)

(ctx)

(ctx, x = 150, y = 130, a = 9)

(ctx, x = 10, y = 10, width = 100, height = 250)

(ctx, r = 70, R = 140, x = 145, y = 160)

(ctx)

()

()

(props)

({ canvasWidth, // 轴长 canvasHeight, // 轴高 waveWidth = 0.055, // 波浪宽度,数越小越宽 waveHeight = 6, //

(ctx)

(ctx)

(ctx, xOffset = 0, nowRange = 0)

(canvasEl)