56 lines
2.4 KiB
C
56 lines
2.4 KiB
C
/*
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* libtcod 1.6.0
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* Copyright (c) 2008,2009,2010,2012,2013 Jice & Mingos
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* * The name of Jice or Mingos may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY JICE AND MINGOS ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL JICE OR MINGOS BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _TCOD_BRESENHAM_H
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#define _TCOD_BRESENHAM_H
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typedef bool (*TCOD_line_listener_t) (int x, int y);
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TCODLIB_API void TCOD_line_init(int xFrom, int yFrom, int xTo, int yTo);
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TCODLIB_API bool TCOD_line_step(int *xCur, int *yCur); /* advance one step. returns true if we reach destination */
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/* atomic callback function. Stops when the callback returns false */
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TCODLIB_API bool TCOD_line(int xFrom, int yFrom, int xTo, int yTo, TCOD_line_listener_t listener);
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/* thread-safe versions */
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typedef struct {
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int stepx;
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int stepy;
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int e;
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int deltax;
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int deltay;
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int origx;
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int origy;
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int destx;
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int desty;
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} TCOD_bresenham_data_t;
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TCODLIB_API void TCOD_line_init_mt(int xFrom, int yFrom, int xTo, int yTo, TCOD_bresenham_data_t *data);
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TCODLIB_API bool TCOD_line_step_mt(int *xCur, int *yCur, TCOD_bresenham_data_t *data);
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TCODLIB_API bool TCOD_line_mt(int xFrom, int yFrom, int xTo, int yTo, TCOD_line_listener_t listener, TCOD_bresenham_data_t *data);
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#endif
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