polygon_types.h

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/*                 P O L Y G O N _ T Y P E S. H
 * BRL-CAD
 *
 * Copyright (c) 2004-2023 United States Government as represented by
 * the U.S. Army Research Laboratory.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public License
 * version 2.1 as published by the Free Software Foundation.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this file; see the file named COPYING for more
 * information.
 */
 
/*----------------------------------------------------------------------*/
/* @file polygon_types.h */
/** @addtogroup bg_polygon */
/** @{ */
 
/**
 *  @brief Functions for working with polygons
 */
 
#ifndef BG_POLYGON_TYPES_H
#define BG_POLYGON_TYPES_H
 
#include "common.h"
#include "vmath.h"
 
__BEGIN_DECLS
 
/* The following data types are originally from bv - we keep them
 * separate here to maximize their ease of reuse */
typedef enum { bg_Union, bg_Difference, bg_Intersection, bg_Xor } bg_clip_t;
 
struct bg_poly_contour {
    size_t    num_points;
    point_t   *point;               /* in model coordinates */
    int       open;                 /* 0 = closed, 1 = open */
};
 
struct bg_polygon {
    size_t                  num_contours;
    int                     *hole;
    struct bg_poly_contour  *contour;
 
    // TODO - in principle these shouldn't be here, but the libtclcad code uses
    // them so it will take some thought to refactor them up from this
    // container...
    int                 gp_color[3];
    int                 gp_line_width;          /* in pixels */
    int                 gp_line_style;
};
 
#define BG_POLYGON_NULL {0, NULL, NULL, {0, 0, 0}, 0, 0}
 
struct bg_polygons {
    size_t            num_polygons;
    struct bg_polygon *polygon;
};
 
__END_DECLS
 
#endif  /* BG_POLYGON_TYPES_H */
/** @} */
/*
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 * mode: C
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 * c-file-style: "stroustrup"
 * End:
 * ex: shiftwidth=4 tabstop=8
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