interpolate_arc()

static double interpolate_arc ( double  angle, double  a1, double  a2, double  a3, double  zm1, double  zm2, double  zm3  )

static

Definition at line 95 of file lwstroke.c.

References LWDEBUGF.

Referenced by lwarc_linearize().

{
        LWDEBUGF(4,"angle %.05g a1 %.05g a2 %.05g a3 %.05g zm1 %.05g zm2 %.05g zm3 %.05g",angle,a1,a2,a3,zm1,zm2,zm3);
        /* Counter-clockwise sweep */
        if ( a1 < a2 )
        {
                if ( angle <= a2 )
                        return zm1 + (zm2-zm1) * (angle-a1) / (a2-a1);
                else
                        return zm2 + (zm3-zm2) * (angle-a2) / (a3-a2);
        }
        /* Clockwise sweep */
        else
        {
                if ( angle >= a2 )
                        return zm1 + (zm2-zm1) * (a1-angle) / (a1-a2);
                else
                        return zm2 + (zm3-zm2) * (a2-angle) / (a2-a3);
        }
}

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