volumetric.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.
 *
 * The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
 * All rights reserved.
 *
 * The Original Code is: all of this file.
 *
 * Contributor(s): Matt Ebb.
 *
 * ***** END GPL LICENSE BLOCK *****
 */

struct Isect;
struct ShadeInput;
struct ShadeResult;

float vol_get_density(struct ShadeInput *shi, const float co[3]);
void vol_get_scattering(ShadeInput *shi, float scatter_col[3], const float co[3], const float view[3]);

void shade_volume_outside(ShadeInput *shi, ShadeResult *shr);
void shade_volume_inside(ShadeInput *shi, ShadeResult *shr);
void shade_volume_shadow(struct ShadeInput *shi, struct ShadeResult *shr, struct Isect *last_is);

#define STEPSIZE_VIEW   0
#define STEPSIZE_SHADE  1

#define VOL_IS_BACKFACE         1
#define VOL_IS_SAMEMATERIAL     2

#define VOL_BOUNDS_DEPTH    0
#define VOL_BOUNDS_SS       1

#define VOL_SHADE_OUTSIDE   0
#define VOL_SHADE_INSIDE    1