Sensual exploration of hidden curves and contours. Sensual exploration of hidden curves and contours. %e0%a6%a6%e0%a6%be%e0%a6%a6%e0%a6%be%e0%a6%a6%e0%a7%87%e0%a6%b0%e0%a6%ae%e0%a6%be%e0%a6%ae%e0%a6%be%e0%a6%87%e0%a6%af%e0%a6%bc%e0%a6%be%e0%a6%b0