Added gemspec to be able to bundle install from git.

Added IplImage#smoothness that returns :smooth, :messy, or :blank.
Rake compile will now compile the C extension code.

ext/opencv/cvcircle32f.cpp

@@ -0,0 +1,116 @@
+/************************************************************
+
+   cvcircle32f.cpp -
+
+   $Author: lsxi $
+
+   Copyright (C) 2005-2006 Masakazu Yonekura
+
+************************************************************/
+#include "cvcircle32f.h"
+/*
+ * Document-class: OpenCV::CvCircle32f
+ *
+ * Combination of center and radius.
+ *
+ * see CvMat#hough_circles
+ */
+__NAMESPACE_BEGIN_OPENCV
+__NAMESPACE_BEGIN_CVCIRCLE32F
+
+VALUE rb_klass;
+
+VALUE
+rb_class()
+{
+  return rb_klass;
+}
+
+void
+define_ruby_class()
+{
+  if (rb_klass)
+    return;
+  /* 
+   * opencv = rb_define_module("OpenCV");
+   * 
+   * note: this comment is used by rdoc.
+   */
+  VALUE opencv = rb_module_opencv();
+  
+  rb_klass = rb_define_class_under(opencv, "CvCircle32f", rb_cObject);
+  rb_define_alloc_func(rb_klass, rb_allocate);
+  rb_define_method(rb_klass, "center", RUBY_METHOD_FUNC(rb_center), 0);
+  rb_define_method(rb_klass, "radius", RUBY_METHOD_FUNC(rb_radius), 0);
+  rb_define_method(rb_klass, "[]", RUBY_METHOD_FUNC(rb_aref), 1);
+  rb_define_method(rb_klass, "to_ary", RUBY_METHOD_FUNC(rb_to_ary), 0);
+  rb_define_alias(rb_klass, "to_a", "to_ary");
+}
+
+VALUE
+rb_allocate(VALUE klass)
+{
+  CvCircle32f *ptr;
+  return Data_Make_Struct(klass, CvCircle32f, 0, -1, ptr);
+}
+
+/*
+ * Return parameter on center.
+ */
+VALUE
+rb_center(VALUE self)
+{
+  return cCvPoint2D32f::new_object(CVCIRCLE32F(self)->center);
+}
+
+/*
+ * Return parameter on radius.
+ */
+VALUE
+rb_radius(VALUE self)
+{
+  return rb_float_new(CVCIRCLE32F(self)->radius);
+}
+
+/*
+ * call-seq:
+ *   [<i>index</i>]
+ *
+ * Return value of <i>index</i> dimension.
+ */
+VALUE
+rb_aref(VALUE self, VALUE index)
+{
+  switch (NUM2INT(index)) {
+  case 0:
+    return DBL2NUM(CVCIRCLE32F(self)->center.x);
+    break;
+  case 1:
+    return DBL2NUM(CVCIRCLE32F(self)->center.y);
+    break;
+  case 2:
+    return DBL2NUM(CVCIRCLE32F(self)->radius);
+    break;
+  default:
+    rb_raise(rb_eIndexError, "index should be 0...3");
+    break;
+  }
+  return Qnil;
+}
+
+VALUE
+rb_to_ary(VALUE self)
+{
+  return rb_ary_new3(2, rb_center(self), rb_radius(self));
+}
+
+VALUE
+new_object(CvCircle32f circle32f)
+{
+  VALUE object = rb_allocate(rb_klass);
+  *CVCIRCLE32F(object) = circle32f;
+  return object;
+}
+
+__NAMESPACE_END_CVCIRCLE32F
+__NAMESPACE_END_OPENCV