question: public boolean epsilonEquals ( float x , float y , float z , float epsilon ) { if ( Math . abs ( x - this . x ) > epsilon ) return false ; if ( Math . abs ( y - this . y ) > epsilon ) return false ; if ( Math . abs ( z - this . z ) > epsilon ) return false ; return true ; }
target:  Compares this vector with the other vector, using the supplied epsilon for fuzzy equality testing.