Volume.H

// ---------------------------------------------------------------
// Volume.H
// ---------------------------------------------------------------
#ifndef _VOLUME_H_
#define _VOLUME_H_

#ifdef BL_VOLUMERENDER
#include <volpack.h>
#else
#define VP_NORM_MAX  7923    // maximum value of a 13 bit normal
#endif

#define SWF_HEADER   62      // bytes of header in file

  typedef struct {	     // contents of a voxel
    short normal;            // encoded surface normal vector
                             // normal is unused in the value model
    unsigned char density;   // original density
    unsigned char gradient;  // original gradient
                             // gradient becomes the normal in the value model
  } RawVoxel;


#define DENSITY_PARAM		0           // classification parameters
#define OCTREE_DENSITY_THRESH	4
#define GRADIENT_PARAM		1
#define OCTREE_GRADIENT_THRESH	4
#define OCTREE_BASE_NODE_SIZE	4


#define BYTES_PER_VOXEL	sizeof(RawVoxel)    // voxel size in bytes

#endif