public static void subQuad ( double [ ] coef , double t0 , boolean left ) { if ( left ) { coef [ 2 ] = ( 1 - t0 ) * coef [ 0 ] + t0 * coef [ 2 ] ; coef [ 3 ] = ( 1 - t0 ) * coef [ 1 ] + t0 * coef [ 3 ] ; } else { coef [ 2 ] = ( 1 - t0 ) * coef [ 2 ] + t0 * coef [ 4 ] ; coef [ 3 ] = ( 1 - t0 ) * coef [ 3 ] + t0 * coef [ 5 ] ; } }
t0 - ?