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diff --git a/generic/OverlapMan.h b/generic/OverlapMan.h
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+/*
+ * OverlapMan.h -- Track label overlap avoidance manager header file
+ *
+ * Authors		:
+ * Creation date	:
+ *
+ * $Id$
+ */
+
+/*
+ *  Copyright (c) 1993 - 1999 CENA --
+ *
+ * This code is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This code 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this code; if not, write to the Free
+ * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ */
+
+
+#ifndef _OverlapMan_h
+#define _OverlapMan_h
+
+
+#include <string.h>
+#include <math.h>
+
+
+/*
+ * This is the interface with the radar widget. To substitute
+ * a different overlap manager, it is necessary to conform to
+ * this API.
+ */
+void
+OmRegister(void	*w,
+	   void	*(*_fnext_track)(void *ptr,
+				 void *item,
+				 int *x, int *y,
+				 int *sv_dx, int *sv_dy,
+				 int *label_x, int *label_y,
+				 int *label_width, int *label_height,
+				 int *rho, int *theta,
+				 int *visibility),
+	   void	(*_fset_label_angle)(void *ptr, void *item, int theta),
+	   void	(*_fquery_label_pos)(void *ptr, void *item, int theta,
+				     int *x, int *y, int *w, int *h));
+void
+OmUnregister(void	*w);
+void
+OmProcessOverlap(void	*radar,
+		 int	width,
+		 int	height,
+		 double	scale);
+
+/*
+ * These are overlap manager public functions used
+ * to set various parameters controlling the algorithm
+ * behavior.
+ */
+void
+OmSetParam(double	repulsion, 
+	   double	repulsion_bearing, 
+	   double	friction, 
+	   double	best_position_attraction, 
+	   double	screen_edge_repulsion);
+void
+OmGetParam(double	*repulsion, 
+	   double	*repulsion_bearing, 
+	   double	*friction, 
+	   double	*best_position_attraction, 
+	   double	*screen_edge_repulsion);
+void
+OmGetMinParam(double	*min_repulsion, 
+	      double	*min_repulsion_bearing, 
+	      double	*min_friction, 
+	      double	*min_best_position_attraction, 
+	      double	*min_screen_edge_repulsion);
+void
+OmGetMaxParam(double	*max_repulsion, 
+	      double	*max_repulsion_bearing, 
+	      double	*max_friction, 
+	      double	*max_best_position_attraction, 
+	      double	*max_screen_edge_repulsion);
+
+
+#endif	/* _OverlapMan_h */