Re: Crinkled Hyperbola (ContourPlot in Manipulate)
- To: mathgroup at smc.vnet.net
- Subject: [mg77837] Re: Crinkled Hyperbola (ContourPlot in Manipulate)
- From: "David Park" <djmpark at comcast.net>
- Date: Mon, 18 Jun 2007 06:53:16 -0400 (EDT)
- References: <f532pg$3d4$1@smc.vnet.net>
Manipulate[ContourPlot[x^2 - y^2 == 1, {x, -3, 3}, {y, -3, 3},
PerformanceGoal -> "Quality",
Epilog -> {PointSize at 0.02, Point@{Cosh@h, Sinh@h}}], {h, -1.5, 1.5}]
--
David Park
djmpark at comcast.net
http://home.comcast.net/~djmpark/
"Bruce Colletti" <vze269bv at verizon.net> wrote in message
news:f532pg$3d4$1 at smc.vnet.net...
> Re Mathematica 6.0 under WinXP.
>
> As the slider moves, a point glides along the hyperbola:
>
> Manipulate[ContourPlot[x^2-y^2==1,{x,-3,3},{y,-3,3},Epilog->{
> PointSize at 0.02,Point@{Cosh@h,Sinh@h}}],
> {h,-1.5,1.5}]
>
> However, the moving point crinkles the plot, which restores itself when
> the mouse button is released.
>
> What causes the crinkling (this seems tied to ContourPlot, since no
> crinkling occurs when I use Plot[Sqrt[x^2-1],...])?
>
> Thankx.
>
> Bruce
>