To initial, plot and show a Sierpinski pedal 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 SPT/PT 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 SPT will be returned if the original triangle is an acute triangle.
The viewport of showing the SPT/ST "abc" can be changed by changing the value of abc$viewport.
B. Wang firstname.lastname@example.org
Zhang, XM., Hitt, R. Wang, B. and Ding, J. (2008). Sierpinski Pedal Triangle. Fractals. 16(2): 141-150.
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