AI for Game Developers
by David M. Bourg, Glenn Seeman

The unconfirmed error reports are from readers.  They have not yet been 
approved or disproved by the author or editor and represent solely the
opinion of the reader.

Here's a key to the markup:
        [page-number]: serious technical mistake
        {page-number}: minor technical mistake
        <page-number>: important language/formatting problem
        (page-number): language change or minor formatting problem
        ?page-number?: reader question or request for clarification

This page was updated February 21, 2008.


UNCONFIRMED  errors and comments from readers: 


(83)  Sidebar on the Lenard-Jones Potential Function;
In expessing the derivative of the potential function, a "V" is used to represent
potential, instead of the "U" used in the original function.


(183) Below header "Thirsty";
The two paragraphs below the "Thirsty" header say the same things twice in some different wording. They 
ought to be said just once, in one paragraph.


[199]  procedure "FuzzyTriangle" 4th line;

double	FuzzyTriangle(double value, double x0, double x1, double x2)
{
	double result = 0;
	double x = value;

Error->	if(x <= x0)  --> if((x <= x0) || (x >= x2))
		result = 0;
	else if(x == x1)
		result = 1;
	else if((x>x0) && (x<x1))
		result = (x/(x1-x0))-(x0/(x1-x0));
	else
		result = (-x/(x2-x1))+(x2/(x2-x1));

	return result;
}

Omission of the second check .|| (x >= x2). results in erratic behavior with values
larger then x2 (produces negative values)



[207]  Table 10.1 Membership Calculation results;
I think the Degree of membership for left value is
m_Left value is -2.2 and not 0.0

mLeft = FuzzyTrapezoid( 33, -40, -25, -15, 0 )

I have the result -2.2