Projections.h

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/*
 * 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.
 */
 
#ifndef __PROJECTIONS_H__
#define __PROJECTIONS_H__
 
#include <stdio.h>
#include <stdlib.h>
 
#define CONTAINS_INDEX
#define GRID_DIMENSION 20
 
#if defined(_WIN32) && !(_MSC_VER >= 1900)
#  define isnan(n) _isnan(n)
#  define LONG __int64
#  define int64_t __int64
#else
#  include <stdint.h>
#endif
 
extern const int vertmap[8][3];
extern const int centmap[3][3][3][2];
extern const int edgemap[12][2];
extern const int facemap[6][4];
 
/* Axes:
 *  0,  1,  2: cube face normals
 *
 *          3: triangle normal
 *
 *  4,  5,  6,
 *  7,  8,  9,
 * 10, 11, 12: cross of each triangle edge vector with each cube
 *             face normal
 */
#define NUM_AXES 13
 
struct TriangleProjection {
  int64_t tri_proj[NUM_AXES][2];
 
  double norm[3];
 
  int index;
};
 
/* This is a projection for the cube against a single projection
   axis, see CubeTriangleIsect.cubeProj */
struct CubeProjection {
  int64_t origin;
  int64_t edges[3];
  int64_t min, max;
};
 
class CubeTriangleIsect {
 public:
  TriangleProjection *inherit;
 
  CubeProjection cubeProj[NUM_AXES];
 
 public:
  CubeTriangleIsect()
  {
  }
 
  CubeTriangleIsect(int64_t cube[2][3], int64_t trig[3][3], int64_t error, int triind);
 
  CubeTriangleIsect(CubeTriangleIsect *parent);
 
  unsigned char getBoxMask();
 
  void shift(int off[3]);
 
  int isIntersecting() const;
 
  int isIntersectingPrimary(int edgeInd) const;
 
  float getIntersectionPrimary(int edgeInd) const;
 
#ifdef WITH_CXX_GUARDEDALLOC
  MEM_CXX_CLASS_ALLOC_FUNCS("DUALCON:CubeTriangleIsect")
#endif
};
 
#endif /* __PROJECTIONS_H__ */