Initial revision.

Scenery/chunkmgr.c

@@ -0,0 +1,53 @@
+/**************************************************************************
+ * chunkmgr.c -- top level scenery chunk management system.
+ *
+ * Written by Curtis Olson, started July 1997.
+ *
+ * Copyright (C) 1997  Curtis L. Olson  - curt@infoplane.com
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program 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
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ * $Id$
+ * (Log is kept at end of this file)
+ **************************************************************************/
+
+
+#include "chunkmgr.h"
+
+
+/* we'll use a fixed sized chunk list for now */
+static struct chunk chunk_list[MAX_CHUNK_LIST];
+
+/* ... and a fixed sized chunk cache */
+static struct chunk chunk_cache[MAX_CHUNK_CACHE];
+
+
+/* initialize the chunk management system */
+void chunk_init() {
+}
+
+
+/* load all chunks within radius distance of the specified point if
+ * they are not already loaded or cached.  Remove or cache any chunks that are
+ * out of range. */
+void chunk_update(double lat, double lon, double radius) {
+}
+
+
+/* $Log$
+/* Revision 1.1  1997/07/31 23:19:33  curt
+/* Initial revision.
+/*
+ */

Scenery/chunkmgr.h

@@ -0,0 +1,73 @@
+/**************************************************************************
+ * chunkmgr.h -- top level scenery chunk management system.
+ *
+ * Written by Curtis Olson, started July 1997.
+ *
+ * Copyright (C) 1997  Curtis L. Olson  - curt@infoplane.com
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program 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
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ * $Id$
+ * (Log is kept at end of this file)
+ **************************************************************************/
+
+
+#ifndef CHUNKMGR_H
+#define CHUNKMGR_H
+
+
+#include "mesh.h"
+
+
+#define MAX_CHUNK_LIST  1000
+#define MAX_CHUNK_CACHE 100
+
+
+struct chunk {
+    /* path name to the data file for this chunk */
+    char path[1024];
+
+    /* coordinates (in arc seconds) */
+    double lon, lat;
+
+    /* coordinates (cartesian, units = km) */
+    double x, y, z;
+
+    /* last calculated distance from current viewpoint */
+    double dist;
+
+    /* pointer to elevation grid array for this chunk*/
+    struct mesh *terrain_ptr;
+};
+
+
+/* initialize the chunk management system */
+void chunk_init();
+
+
+/* load all chunks within radius distance of the specified point if
+ * they are not already loaded or cached.  Remove or cache any chunks that are
+ * out of range. */
+void chunk_update(double lat, double lon, double radius);
+
+
+#endif /* CHUNKMGR_H */
+
+
+/* $Log$
+/* Revision 1.1  1997/07/31 23:19:34  curt
+/* Initial revision.
+/*
+ */