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diff --git a/apps/graphics/traveller/include/trv_world.h b/apps/graphics/traveller/include/trv_world.h
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+/****************************************************************************
+ * apps/graphics/traveller/include/trv_world.h
+ *
+ *   Copyright (C) 2014 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+#ifndef __APPS_GRAPHICS_TRAVELLER_INCLUDE_TRV_WORLD_H
+#define __APPS_GRAPHICS_TRAVELLER_INCLUDE_TRV_WORLD_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include "trv_types.h"
+
+/****************************************************************************
+ * Public Types
+ ****************************************************************************/
+
+/* The following structure contains all information necessary to define
+ * a point-of-view.
+ */
+
+struct trv_camera_s
+{
+  nxgl_coord_t x;      /* Camera X position */
+  nxgl_coord_t y;      /* Camera Y position */
+  nxgl_coord_t z;      /* Camera Z position */
+  int16_t      yaw;    /* Camera yaw orientation */
+  int16_t      pitch;  /* Camera pitch orientation */
+};
+
+/****************************************************************************
+ * Public Function Prototypes
+ ****************************************************************************/
+
+int  trv_world_create(FAR const char *mapfile);
+void trv_world_destroy(void);
+
+#endif /* __APPS_GRAPHICS_TRAVELLER_INCLUDE_TRV_WORLD_H */