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- /*
- * dett.c -- determinant of a transform.
- *
- * 4 june 1989 Olle Olsson.
- */
-
- #include "ifs.h"
- #include <math.h>
-
- double dett( transform *tp )
- {
- /* determinant of the transform */
- return fabs(tp -> a11 * tp -> a22 - tp -> a12 * tp -> a21 );
- }
-
-
-