JSGS Shapes

TNTLimaçon2

Notes:

A 'polar coordinates' type shape; the second of 2 variations of this type shape. Study the variations here, and compare to TNTLimaçon. Learn more about this shape at Mathworld.

r = b + a*cos(θ)

TNTLimaçon2 Features and Usage:

Primary Attributes:	6 Parameters: center: TNTPoint a: a decimal (known as a 'double' in code) b: a decimal (known as a 'double' in code) fillColor: TNTColor as `fcolr` borderStroke: a TNTStroke rotn: a 'double' that rotates the shape about its center. rotn > 0 ==> counter-clockwise; rotn < 0 ==> clockwise
To Create:	The example above was created by: var aLimacon = new TNTLimacon2(origin, 8, 4, yellow, blackStroke, 0); aLimacon.drawTNTLimacon2(context);
To Draw:	aLimacon.drawTNTLimacon2(context);
More:	This is like a TNTLimaçon, except it only has 6 parameters: If there is an inner loop, it's not filled with color. Experiment with values of a and b: b ≥ 2a: convex limaçon 2a > b > a: dimpled limaçon b = a: the shape degenerates to a cardioid b < a: the limaçon has an inner loop b = a/2, it is a trisectrix (but not the Maclaurin trisectrix) Explore the variations described above with a and b by visiting our Interactive Limaçon2.