func Draw(gc draw2d.GraphicContext, cap draw2d.LineCap, join draw2d.LineJoin,
	x0, y0, x1, y1, offset float64) {
	gc.SetLineCap(cap)
	gc.SetLineJoin(join)

	// Draw thick line
	gc.SetStrokeColor(color.NRGBA{0x33, 0x33, 0x33, 0xFF})
	gc.SetLineWidth(30.0)
	gc.MoveTo(x0, y0)
	gc.LineTo((x0+x1)/2+offset, (y0+y1)/2)
	gc.LineTo(x1, y1)
	gc.Stroke()

	// Draw thin helping line
	gc.SetStrokeColor(color.NRGBA{0xFF, 0x33, 0x33, 0xFF})
	gc.SetLineWidth(2.56)
	gc.MoveTo(x0, y0)
	gc.LineTo((x0+x1)/2+offset, (y0+y1)/2)
	gc.LineTo(x1, y1)
	gc.Stroke()
}
func Draw(gc draw2d.GraphicContext, cap draw2d.LineCap, join draw2d.LineJoin,
	x0, y0, x1, y1, offset float64) {
	gc.SetLineCap(cap)
	gc.SetLineJoin(join)

	
	gc.SetStrokeColor(color.NRGBA{0x33, 0x33, 0x33, 0xFF})
	gc.SetLineWidth(30.0)
	gc.MoveTo(x0, y0)
	gc.LineTo((x0+x1)/2+offset, (y0+y1)/2)
	gc.LineTo(x1, y1)
	gc.Stroke()

	
	gc.SetStrokeColor(color.NRGBA{0xFF, 0x33, 0x33, 0xFF})
	gc.SetLineWidth(2.56)
	gc.MoveTo(x0, y0)
	gc.LineTo((x0+x1)/2+offset, (y0+y1)/2)
	gc.LineTo(x1, y1)
	gc.Stroke()
}
func Draw ( gc draw2d . GraphicContext , cap draw2d . LineCap , join draw2d . LineJoin , x0 , y0 , x1 , y1 , offset float64 ) { gc . SetLineCap ( cap ) gc . SetLineJoin ( join ) // Draw thick line gc . SetStrokeColor ( color . NRGBA { 0x33 , 0x33 , 0x33 , 0xFF } ) gc . SetLineWidth ( 30.0 ) gc . MoveTo ( x0 , y0 ) gc . LineTo ( ( x0 + x1 ) / 2 + offset , ( y0 + y1 ) / 2 ) gc . LineTo ( x1 , y1 ) gc . Stroke ( ) // Draw thin helping line gc . SetStrokeColor ( color . NRGBA { 0xFF , 0x33 , 0x33 , 0xFF } ) gc . SetLineWidth ( 2.56 ) gc . MoveTo ( x0 , y0 ) gc . LineTo ( ( x0 + x1 ) / 2 + offset , ( y0 + y1 ) / 2 ) gc . LineTo ( x1 , y1 ) gc . Stroke ( ) }
// Draw a line with an angle with specified line cap and join
Draw a line with an angle with specified line cap and join