u6_line_walker.h

/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * 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 3 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, see <http://www.gnu.org/licenses/>.
 *
 */

#ifndef NUVIE_MISC_U6_LINE_WALKER_H
#define NUVIE_MISC_U6_LINE_WALKER_H

#include "ultima/nuvie/core/nuvie_defs.h"

namespace Ultima {
namespace Nuvie {

class U6LineWalker {
protected:
    uint32 start_x, start_y;
    uint32 end_x, end_y;

    sint32 xoffset[2], yoffset[2];
    sint32 line_inc[2];
    sint32 line_counter;

    uint32 cur_x, cur_y;
    uint32 max_length;

    uint32 cur_step;

public:
    U6LineWalker(uint32 sx, uint32 sy, uint32 ex, uint32 ey);
    virtual ~U6LineWalker();

    bool step();
    bool next(uint32 *x, uint32 *y);

};

} // End of namespace Nuvie
} // End of namespace Ultima

#endif