Tschirnhausen Cubic Catacaustic: Difference between revisions

Revision as of 09:52, 13 January 2011

A semicubical parabola is a curve defined parametrically as

[math]\displaystyle{ x = t^2 }[/math]

[math]\displaystyle{ y = at^3 }[/math]

@@ Line 17: / Line 17: @@
               ],
               {strokeWidth:1, strokeColor:'black'});
+var cataustic = brd.create('curve',
+                 [function(t){ return a.Value()*6*(t*t-1);},
+                  function(t){ return a.Value()*4*t*t*t;},
+                 -2, 2
+                 ],
+                 {strokeWidth:1, strokeColor:'red'});
 brd.unsuspendUpdate();
 })();