File: frameseq.h

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/*
 *  Copyright (C) 2000-2001  The Exult Team
 *
 *  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 Library 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

#ifndef INCL_FRAMESEQ
#define INCL_FRAMESEQ	1

/*
 *	A sequence of frames.  Frame 0 is the resting state.
 */
class Frames_sequence
	{
	unsigned char *frames;
	int num_frames;
public:
	Frames_sequence(int cnt, unsigned char *f);
	~Frames_sequence()
		{ delete [] frames; }
					// Get resting frame.
	unsigned char get_resting() const
		{ return frames[0]; }
					// Get next frame.  Call
					//   with index = 0 for first one.
	unsigned char get_next(int& index) const
		{
		if (++index >= num_frames)
			index = 1;
		return frames[index];
		}
					// Find frame, masking off rotation.
					// Rets. 0 if not found.
	int find_unrotated(unsigned char frame)
		{
		for (int i = num_frames - 1; i > 0; i--)
			if (((frame ^ frames[i])&0xf) == 0)
				return i;
		return 0;
		}
	};
#endif