--- loncom/homework/response.pm	2005/09/23 16:47:06	1.125
+++ loncom/homework/response.pm	2005/11/03 23:00:53	1.127
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # various response type definitons response definition
 #
-# $Id: response.pm,v 1.125 2005/09/23 16:47:06 albertel Exp $
+# $Id: response.pm,v 1.127 2005/11/03 23:00:53 albertel Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -94,9 +94,9 @@ sub pushrandomnumber {
 	# do nothing
     } else {
 	my @seed=&Math::Random::random_get_seed();
-	push (@randomseeds,\@seed);
+	push(@randomseeds,\@seed);
     }
-    &Apache::response::setrandomnumber();
+    &Apache::response::setrandomnumber(@_);
 }
 sub poprandomnumber {
     my $rand_alg=&Apache::lonnet::get_rand_alg();
@@ -113,13 +113,14 @@ sub poprandomnumber {
 }
 
 sub setrandomnumber {
+    my ($ignore_id2) = @_;
     my $rndseed;
     $rndseed=&Apache::structuretags::setup_rndseed();
     if (!defined($rndseed)) { $rndseed=&Apache::lonnet::rndseed(); }
     &Apache::lonxml::debug("randseed $rndseed");
     #  $rndseed=unpack("%32i",$rndseed);
     my $rand_alg=&Apache::lonnet::get_rand_alg();
-    my $rndmod;
+    my ($rndmod,$rndmod2);
 
     my ($id1,$id2,$shift_amt);
     if ($Apache::lonhomework::parsing_a_problem) {
@@ -130,7 +131,7 @@ sub setrandomnumber {
 	$shift_amt=scalar(@Apache::inputtags::responselist);
     } elsif ($Apache::lonhomework::parsing_a_task) {
 	$id1=$Apache::bridgetask::dimension;
-	if (defined($Apache::bridgetask::instance[-1])) {
+	if (!$ignore_id2 && defined($Apache::bridgetask::instance[-1])) {
 	    $id2=$Apache::bridgetask::instance[-1];
 	}
 	$shift_amt=scalar(@Apache::bridgetask::instance);
@@ -143,19 +144,22 @@ sub setrandomnumber {
     } elsif ($rand_alg eq '64bit3') {
 	$rndmod=(&Apache::lonnet::numval2($id1) << 10);
 	if (defined($id2)) { $rndmod+=&Apache::lonnet::numval2($id2); }
-    } else {
+    } elsif ($rand_alg eq '64bit4') {
 	my $shift=(4*$shift_amt)%30;
 	$rndmod=(&Apache::lonnet::numval3($id1) << (($shift+15)%30));
 	if (defined($id2)) {
 	    $rndmod+=(&Apache::lonnet::numval3($id2) << $shift );
 	}
+    } else {
+	($rndmod,$rndmod2)=&Apache::lonnet::digest("$id1,$id2");
     }
+
     if ($rndseed =~/([,:])/) {
 	my $char=$1;
 	use integer;
 	my ($num1,$num2)=split(/\Q$char\E/,$rndseed);
 	$num1+=$rndmod;
-	$num2+=$rndmod;
+	$num2+= ((defined($rndmod2)) ? $rndmod2 : $rndmod);
 	if($Apache::lonnet::_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
 	$rndseed=$num1.$char.$num2;
     } else {