To initial, plot and show a Sierpinski triangles.
The degrees of two of the three angles of a triangle.
When the original triangle is an acute triangle,
the area of the smallest ST to be drawn is determined by (tol * S),
where S is the total area for plotting. No restriction is applied to
If the original triangle is an obtuse triangle,
the largest value of
iter is 12.
tol: A stopping creiteria to draw the sub-SPT. Default value 0.0001.
The dimension of the ST will be returned if the original triangle is an acute triangle.
B. Wang firstname.lastname@example.org
Zhang, XM., Hitt, R. Wang, B. and Ding, J. (2008). Sierpinski Pedal Triangle. Fractals. 16(2): 141-150.