draw_tangle

Functions

add_corners_and_smoothen(zz)	add corners to the zig-zag line, so it starts and ends in a rectangle (the bounding box)
angle_between_points(z1, z2, z3)	return angle between three complex points, 0 if parallel
are_continuation(a, b, radius)
connect(z, w, pos)	Make a connection line with vertical, horizontal or diagonal lines between points z (left) and w (right) pos can be "N" or "S"
crossings(expr)	return the number of crossings
draw(expr[, translate])	Convert the tangle expr, convert it to a zig-zag line and plot it.
draw_smooth(expr)
integral(n)	Integral tangle, return a sum of 1's or -1's
to_zigzag(expr)	Convert a algebraic tangle into a geometric zig-zag line

Classes

TangleExpr(term1, term2)	General expression for a tangle, either Sum or Product of tangles stored in an array
TangleProduct(term1, term2)	Formal product of tangles
TangleSum(term1, term2)	Formal sum of tangles
ZigZag()	Class to draw a zig-zag line.