From 4922d448896abe5330f106f21fd6a3b0651ae9eb Mon Sep 17 00:00:00 2001
From: Tavian Barnes <tavianator@gmail.com>
Date: Mon, 6 Jul 2009 16:37:17 +0000
Subject: New C++ Raytracer type.

---
 libdimensionxx/raytrace.cpp | 68 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 68 insertions(+)
 create mode 100644 libdimensionxx/raytrace.cpp

(limited to 'libdimensionxx/raytrace.cpp')

diff --git a/libdimensionxx/raytrace.cpp b/libdimensionxx/raytrace.cpp
new file mode 100644
index 0000000..263fe6d
--- /dev/null
+++ b/libdimensionxx/raytrace.cpp
@@ -0,0 +1,68 @@
+/*************************************************************************
+ * 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
+{
+  Raytracer::Raytracer(Scene& scene)
+    : m_scene(&scene), m_rendered(false) { }
+
+  // Call render() if we've never rendered the scene
+  Raytracer::~Raytracer()
+  {
+    if (!m_rendered) {
+      try {
+        render();
+      } catch (...) {
+        dmnsn_error(SEVERITY_MEDIUM,
+                    "Rendering scene failed in Raytracer destructor.");
+      }
+    }
+  }
+
+  // Render the scene
+  void Raytracer::render()
+  {
+    // Raytrace the scene
+    if (dmnsn_raytrace_scene(m_scene->dmnsn()) != 0) {
+      // The rendering operation failed
+      throw Dimension_Error("Raytracing scene failed.");
+    }
+
+    m_rendered = true; // Don't render the scene again in the destructor
+  }
+
+  // Render a scene in the background
+  Progress
+  Raytracer::render_async()
+  {
+    m_rendered = true; // Don't render the scene again in the destructor
+
+    // Start the asynchronous task
+    dmnsn_progress *progress = dmnsn_raytrace_scene_async(m_scene->dmnsn());
+    if (!progress) {
+      throw Dimension_Error("Starting background raytrace failed.");
+    }
+
+    // Return the Progress object
+    return Progress(progress);
+  }
+}
-- 
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