Index: rotate.h
===================================================================
--- rotate.h	(nonexistent)
+++ rotate.h	(revision 2)
@@ -0,0 +1,73 @@
+/*
+ *                            COPYRIGHT
+ *
+ *  PCB, interactive printed circuit board design
+ *  Copyright (C) 1994,1995,1996 Thomas Nau
+ *
+ *  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.
+ *
+ *  Contact addresses for paper mail and Email:
+ *  Thomas Nau, Schlehenweg 15, 88471 Baustetten, Germany
+ *  Thomas.Nau@rz.uni-ulm.de
+ *
+ *  RCS: $Id$
+ */
+
+/* prototypes for transform routines
+ */
+
+#ifndef	PCB_ROTATE_H
+#define	PCB_ROTATE_H
+
+#include "global.h"
+
+/* ---------------------------------------------------------------------------
+ * some useful transformation macros and constants
+ */
+#define	ROTATE(x,y,x0,y0,n)							\
+	{												\
+		Coord	dx = (x)-(x0),					\
+					dy = (y)-(y0);					\
+													\
+		switch(n & 0x03)									\
+		{											\
+			case 1:		(x)=(x0)+dy; (y)=(y0)-dx;	\
+						break;						\
+			case 2:		(x)=(x0)-dx; (y)=(y0)-dy;	\
+						break;						\
+			case 3:		(x)=(x0)-dy; (y)=(y0)+dx;	\
+						break;						\
+			default:	break;						\
+		}											\
+	}
+#define	ROTATE_VIA_LOWLEVEL(v,x0,y0,n)	ROTATE((v)->X,(v)->Y,(x0),(y0),(n))
+#define	ROTATE_PIN_LOWLEVEL(p,x0,y0,n)	ROTATE((p)->X,(p)->Y,(x0),(y0),(n))
+#define	ROTATE_PAD_LOWLEVEL(p,x0,y0,n)	\
+	RotateLineLowLevel(((LineTypePtr) (p)),(x0),(y0),(n))
+
+#define	ROTATE_TYPES	(ELEMENT_TYPE | TEXT_TYPE | ELEMENTNAME_TYPE | ARC_TYPE)
+
+
+void RotateLineLowLevel (LineTypePtr, Coord, Coord, unsigned);
+void RotateArcLowLevel (ArcTypePtr, Coord, Coord, unsigned);
+void RotateBoxLowLevel (BoxTypePtr, Coord, Coord, unsigned);
+void RotateTextLowLevel (TextTypePtr, Coord, Coord, unsigned);
+void RotatePolygonLowLevel (PolygonTypePtr, Coord, Coord, unsigned);
+void RotateElementLowLevel (DataTypePtr, ElementTypePtr, Coord, Coord, unsigned);
+void *RotateObject (int, void *, void *, void *, Coord, Coord,
+		    unsigned);
+void RotateScreenObject (Coord, Coord, unsigned);
+
+#endif