dualcon.h

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/*
 * ***** BEGIN GPL LICENSE BLOCK *****
 *
 * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * Contributor(s): Nicholas Bishop
 *
 * ***** END GPL LICENSE BLOCK *****
 */

#ifndef DUALCON_H
#define DUALCON_H

#ifdef __cplusplus
extern "C" { 
#endif

typedef float (*DualConCo)[3];
typedef unsigned int (*DualConFaces)[4];
struct DerivedMesh;

typedef struct DualConInput {
    DualConCo co;
    int co_stride;
    int totco;
    
    DualConFaces faces;
    int face_stride;
    int totface;
    
    float min[3], max[3];
} DualConInput;

/* callback for allocating memory for output */
typedef void *(*DualConAllocOutput)(int totvert, int totquad);
/* callback for adding a new vertex to the output */
typedef void (*DualConAddVert)(void *output, const float co[3]);
/* callback for adding a new quad to the output */
typedef void (*DualConAddQuad)(void *output, const int vert_indices[4]);

typedef enum {
    DUALCON_FLOOD_FILL = 1,
} DualConFlags;

typedef enum {
    /* blocky */
    DUALCON_CENTROID,
    /* smooth */
    DUALCON_MASS_POINT,
    /* keeps sharp edges */
    DUALCON_SHARP_FEATURES,
} DualConMode;

/* Usage:
   
   The three callback arguments are used for creating the output
   mesh. The alloc_output callback takes the total number of vertices
   and faces (quads) that will be in the output. It should allocate
   and return a structure to hold the output mesh. The add_vert and
   add_quad callbacks will then be called for each new vertex and
   quad, and the callback should add the new mesh elements to the
   structure.
*/
void *dualcon(const DualConInput *input_mesh,
              /* callbacks for output */
              DualConAllocOutput alloc_output,
              DualConAddVert add_vert,
              DualConAddQuad add_quad,

              /* flags and settings to control the remeshing
                 algorithm */
              DualConFlags flags,
              DualConMode mode,
              float threshold,
              float hermite_num,
              float scale,
              int depth);

#ifdef __cplusplus
} 
#endif

#endif