add patch to integrate Math::Trig::Radial into Math::Trig

	Message-Id: <199806291328.QAA16916@alpha.hut.fi>
	Subject: [PATCH] 5.004_68 (or 5.004_04): radial trig

p4raw-id: //depot/perl@1267

1 files changed, 100 insertions, 1 deletions

diff --git a/t/lib/trig.t b/t/lib/trig.t
index c2bc2a8b5b..09147112c7 100755
--- a/t/lib/trig.t
+++ b/t/lib/trig.t
@@ -25,7 +25,7 @@ sub near ($$;$) {
     abs($_[0] - $_[1]) < (defined $_[2] ? $_[2] : $eps);
 }
 
-print "1..7\n";
+print "1..20\n";
 
 $x = 0.9;
 print 'not ' unless (near(tan($x), sin($x) / cos($x)));
@@ -54,4 +54,103 @@ print "ok 6\n";
 print 'not ' unless (near(rad2deg(pi), 180));
 print "ok 7\n";
 
+use Math::Trig ':radial';
+
+{
+    my ($r,$t,$z) = cartesian_to_cylindrical(1,1,1);
+
+    print 'not ' unless (near($r, sqrt(2)))     and
+	                (near($t, deg2rad(45))) and
+			(near($z, 1));
+    print "ok 8\n";
+
+    ($x,$y,$z) = cylindrical_to_cartesian($r, $t, $z);
+
+    print 'not ' unless (near($x, 1)) and
+	                (near($y, 1)) and
+			(near($z, 1));
+    print "ok 9\n";
+
+    ($r,$t,$z) = cartesian_to_cylindrical(1,1,0);
+
+    print 'not ' unless (near($r, sqrt(2)))     and
+	                (near($t, deg2rad(45))) and
+			(near($z, 0));
+    print "ok 10\n";
+
+    ($x,$y,$z) = cylindrical_to_cartesian($r, $t, $z);
+
+    print 'not ' unless (near($x, 1)) and
+	                (near($y, 1)) and
+			(near($z, 0));
+    print "ok 11\n";
+}
+
+{
+    my ($r,$t,$f) = cartesian_to_spherical(1,1,1);
+
+    print 'not ' unless (near($r, sqrt(3)))     and
+	                (near($t, deg2rad(45))) and
+			(near($f, atan2(sqrt(2), 1)));
+    print "ok 12\n";
+
+    ($x,$y,$z) = spherical_to_cartesian($r, $t, $f);
+
+    print 'not ' unless (near($x, 1)) and
+	                (near($y, 1)) and
+			(near($z, 1));
+    print "ok 13\n";
+
+    ($r,$t,$f) = cartesian_to_spherical(1,1,0);
+
+    print 'not ' unless (near($r, sqrt(2)))     and
+	                (near($t, deg2rad(45))) and
+			(near($f, deg2rad(90)));
+    print "ok 14\n";
+
+    ($x,$y,$z) = spherical_to_cartesian($r, $t, $f);
+
+    print 'not ' unless (near($x, 1)) and
+	                (near($y, 1)) and
+			(near($z, 0));
+    print "ok 15\n";
+}
+
+{
+    my ($r,$t,$z) = cylindrical_to_spherical(spherical_to_cylindrical(1,1,1));
+
+    print 'not ' unless (near($r, 1)) and
+	                (near($t, 1)) and
+			(near($z, 1));
+    print "ok 16\n";
+
+    ($r,$t,$z) = spherical_to_cylindrical(cylindrical_to_spherical(1,1,1));
+
+    print 'not ' unless (near($r, 1)) and
+	                (near($t, 1)) and
+			(near($z, 1));
+    print "ok 17\n";
+}
+
+{
+        use Math::Trig 'great_circle_distance';
+
+	print 'not '
+	    unless (near(great_circle_distance(0, 0, 0, pi/2), pi/2));
+	print "ok 18\n";
+
+	print 'not '
+	    unless (near(great_circle_distance(0, 0, pi, pi), pi));
+	print "ok 19\n";
+
+	# London to Tokyo.
+	my @L = (deg2rad(-0.5), deg2rad(90 - 51.3));
+        my @T = (deg2rad(139.8),deg2rad(90 - 35.7));
+
+	my $km = great_circle_distance(@L, @T, 6378);
+
+        print 'not ' unless (near($km, 9605.26637021388));
+	print "ok 20\n";
+}
+
 # eof