1 files changed, 47 insertions, 0 deletions
diff --git a/qtruby/rubylib/examples/ruboids/ruboids/Flock.rb b/qtruby/rubylib/examples/ruboids/ruboids/Flock.rb
new file mode 100644
index 00000000..4d476a2b
--- /dev/null
+++ b/qtruby/rubylib/examples/ruboids/ruboids/Flock.rb
@@ -0,0 +1,47 @@
+#
+# Copyright (c) 2001 by Jim Menard <jimm@io.com>
+#
+# Released under the same license as Ruby. See
+# http://www.ruby-lang.org/en/LICENSE.txt.
+#
+
+require 'Flock'
+require 'Boid'
+require 'Params'
+
+class Flock
+    attr_reader :members
+
+    def initialize
+	@members = []
+    end
+
+    def add(boid)
+	@members << boid
+	boid.flock = self
+    end
+
+    def draw
+	@members.each { | boid | boid.draw() }
+    end
+
+    def move
+	@members.each { | boid | boid.move() }
+    end
+
+    # Return distance between two boid's positions.
+    def distBetween(b1, b2)
+	return b1.position.distanceTo(b2.position)
+    end
+
+    # Center of mass
+    def centerExcluding(b)
+	p = Point.new()
+	@members.each { | boid |
+	    p.addPoint(boid.position) unless boid == b
+	}
+	p.divideBy(@members.length - 1)
+	return p
+    end
+end
+