extvol.h

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/*
 * vol.h - Volume rendering definitions etc.
 *
 * (C) Copyright 1994-2022 John E. Stone
 * SPDX-License-Identifier: BSD-3-Clause
 *
 * $Id: extvol.h,v 1.13 2022/02/18 17:55:28 johns Exp $
 *
 */

typedef struct {
  RT_OBJECT_HEAD
  vector min;       
  vector max;       
  flt ambient;      
  flt diffuse;      
  flt opacity;      
  int samples;      
  flt (* evaluator)(flt, flt, flt); 
} extvol;

extvol * newextvol(void * voidtex, vector min, vector max, 
                   int samples, flt (* evaluator)(flt, flt, flt));
color ext_volume_texture(const vector *, const texture *, ray *);