New C++ dmnsn_array* and dmnsn_object* wrappers.

1 files changed, 92 insertions, 0 deletions

diff --git a/libdimensionxx/object.cpp b/libdimensionxx/object.cpp
new file mode 100644
index 0000000..33aeb85
--- /dev/null
+++ b/libdimensionxx/object.cpp
@@ -0,0 +1,92 @@
+/*************************************************************************
+ * Copyright (C) 2008 Tavian Barnes <tavianator@gmail.com>               *
+ *                                                                       *
+ * This file is part of The Dimension Library.                           *
+ *                                                                       *
+ * The Dimension Library is free software; you can redistribute it and/  *
+ * or modify it under the terms of the GNU Lesser General Public License *
+ * as published by the Free Software Foundation; either version 3 of the *
+ * License, or (at your option) any later version.                       *
+ *                                                                       *
+ * The Dimension Library is distributed in the hope that it will be      *
+ * useful, but WITHOUT ANY WARRANTY; without even the implied warranty   *
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU  *
+ * Lesser General Public License for more details.                       *
+ *                                                                       *
+ * You should have received a copy of the GNU Lesser General Public      *
+ * License along with this program.  If not, see                         *
+ * <http://www.gnu.org/licenses/>.                                       *
+ *************************************************************************/
+
+#include "dimensionxx.hpp"
+
+namespace Dimension
+{
+  // Pure virtual no-op destructor
+  Object::~Object()
+  { }
+
+  // Intersection list for the line l
+  Array<double>
+  Object::intersections(const Line& l)
+  {
+    return Array<double>(m_object->intersections_fn(m_object, l.dmnsn()));
+  }
+
+  // Whether the point `point' is inside the object
+  bool
+  Object::inside(const Vector& point)
+  {
+    return m_object->inside_fn(m_object, point.dmnsn());
+  }
+
+  // Return the wrapped object
+  dmnsn_object*
+  Object::dmnsn()
+  {
+    return m_object;
+  }
+
+  // Return a const version of the wrapped canvas
+  const dmnsn_object*
+  Object::dmnsn() const
+  {
+    return m_object;
+  }
+
+  // Protected default no-op constructor
+  Object::Object()
+  { }
+
+  // Custom object callbacks
+  namespace {
+    dmnsn_array *
+    intersections_fn(const dmnsn_object *object, dmnsn_line line)
+    {
+      Custom_Object* cobject = reinterpret_cast<Custom_Object*>(object->ptr);
+      return cobject->intersections(Line(line)).release();
+    }
+
+    int
+    inside_fn(const dmnsn_object *object, dmnsn_vector point)
+    {
+      Custom_Object* cobject = reinterpret_cast<Custom_Object*>(object->ptr);
+      return cobject->inside(Vector(point));
+    }
+  }
+
+  // Initialize a new object, using member functions as callbacks
+  Custom_Object::Custom_Object()
+    : Object(dmnsn_new_object())
+  {
+    m_object->ptr = this;
+    m_object->intersections_fn = &intersections_fn;
+    m_object->inside_fn = &inside_fn;
+  }
+
+  // Delete the object
+  Custom_Object::~Custom_Object()
+  {
+    dmnsn_delete_object(m_object);
+  }
+}