Пример #1
0
func drawLines(ctx *nanovgo.Context, x, y, w, h, t float32) {
	var pad float32 = 5.0
	s := w/9.0 - pad*2
	joins := []nanovgo.LineCap{nanovgo.Miter, nanovgo.Round, nanovgo.Bevel}
	caps := []nanovgo.LineCap{nanovgo.Butt, nanovgo.Round, nanovgo.Square}

	ctx.Save()
	defer ctx.Restore()

	pts := []float32{
		-s*0.25 + cosF(t*0.3)*s*0.5,
		sinF(t*0.3) * s * 0.5,
		-s * 0.25,
		0,
		s * 0.25,
		0,
		s*0.25 + cosF(-t*0.3)*s*0.5,
		sinF(-t*0.3) * s * 0.5,
	}
	for i, cap := range caps {
		for j, join := range joins {
			fx := x + s*0.5 + float32(i*3+j)/9.0*w + pad
			fy := y - s*0.5 + pad

			ctx.SetLineCap(cap)
			ctx.SetLineJoin(join)

			ctx.SetStrokeWidth(s * 0.3)
			ctx.SetStrokeColor(nanovgo.RGBA(0, 0, 0, 160))
			ctx.BeginPath()
			ctx.MoveTo(fx+pts[0], fy+pts[1])
			ctx.LineTo(fx+pts[2], fy+pts[3])
			ctx.LineTo(fx+pts[4], fy+pts[5])
			ctx.LineTo(fx+pts[6], fy+pts[7])
			ctx.Stroke()

			ctx.SetLineCap(nanovgo.Butt)
			ctx.SetLineJoin(nanovgo.Bevel)

			ctx.SetStrokeWidth(1.0)
			ctx.SetStrokeColor(nanovgo.RGBA(0, 192, 255, 255))
			ctx.BeginPath()
			ctx.MoveTo(fx+pts[0], fy+pts[1])
			ctx.LineTo(fx+pts[2], fy+pts[3])
			ctx.LineTo(fx+pts[4], fy+pts[5])
			ctx.LineTo(fx+pts[6], fy+pts[7])
			ctx.Stroke()

		}
	}
}