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/*******************************************************************************
* bcyl.h
*
* This module contains all defines, typedefs, and prototypes for BCYL.C.
*
* ---------------------------------------------------------------------------
* Persistence of Vision Ray Tracer ('POV-Ray') version 3.7.
* Copyright 1991-2013 Persistence of Vision Raytracer Pty. Ltd.
*
* POV-Ray is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* POV-Ray 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
* ---------------------------------------------------------------------------
* POV-Ray is based on the popular DKB raytracer version 2.12.
* DKBTrace was originally written by David K. Buck.
* DKBTrace Ver 2.0-2.12 were written by David K. Buck & Aaron A. Collins.
* ---------------------------------------------------------------------------
* $File: //depot/public/povray/3.x/source/backend/bounding/bcyl.h $
* $Revision: #1 $
* $Change: 6069 $
* $DateTime: 2013/11/06 11:59:40 $
* $Author: chrisc $
*******************************************************************************/
#ifndef BCYL_H
#define BCYL_H
namespace pov
{
/*****************************************************************************
* Global preprocessor defines
******************************************************************************/
/* Generate additional bcyl statistics. */
#define BCYL_EXTRA_STATS 1
/*****************************************************************************
* Global typedefs
******************************************************************************/
typedef struct BCyl_Struct BCYL;
typedef struct BCyl_Entry_Struct BCYL_ENTRY;
typedef struct BCyl_Intersection_Struct BCYL_INT;
struct BCyl_Intersection_Struct
{
int n; /* Number of cylinder hit */
DBL d[2]; /* Intersection distance(s) */
DBL w[2]; /* Intersection parameter(s) */
};
struct BCyl_Entry_Struct
{
short r1, r2; /* Index of min/max segment radius */
short h1, h2; /* Index of min/max segmnet height */
};
struct BCyl_Struct
{
int number; /* Number of bounding cylinders. */
short nradius; /* Number of different bound-radii. */
short nheight; /* Number of different bound-heights. */
DBL *radius; /* List of different bound-radii. */
DBL *height; /* List of different bound-heights. */
BCYL_ENTRY *entry; /* BCyl elements. */
};
/*****************************************************************************
* Global variables
******************************************************************************/
/*****************************************************************************
* Global functions
******************************************************************************/
BCYL *Create_BCyl (int, const DBL *, const DBL *, const DBL *, const DBL *);
void Destroy_BCyl (BCYL *);
int Intersect_BCyl (const BCYL *BCyl, BCYL_INT *Intervals, BCYL_INT *rint, BCYL_INT *hint, const VECTOR P, const VECTOR D);
}
#endif
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