- double J1 = getArea( P( 4 ), P( 1 ), P( 2 ) ) / 2.;
- double J2 = getArea( P( 3 ), P( 1 ), P( 2 ) ) / 2.;
- double J3 = getArea( P( 2 ), P( 3 ), P( 4 ) ) / 2.;
- double J4 = getArea( P( 3 ), P( 4 ), P( 1 ) ) / 2.;
+ double J1 = getArea( P( 4 ), P( 1 ), P( 2 ) );
+ double J2 = getArea( P( 3 ), P( 1 ), P( 2 ) );
+ double J3 = getArea( P( 2 ), P( 3 ), P( 4 ) );
+ double J4 = getArea( P( 3 ), P( 4 ), P( 1 ) );