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/****************************************************************************
* lathe.h
*
* This module contains all defines, typedefs, and prototypes for LATHE.CPP.
*
* from Persistence of Vision(tm) Ray Tracer version 3.6.
* Copyright 1991-2003 Persistence of Vision Team
* Copyright 2003-2004 Persistence of Vision Raytracer Pty. Ltd.
*---------------------------------------------------------------------------
* NOTICE: This source code file is provided so that users may experiment
* with enhancements to POV-Ray and to port the software to platforms other
* than those supported by the POV-Ray developers. There are strict rules
* regarding how you are permitted to use this file. These rules are contained
* in the distribution and derivative versions licenses which should have been
* provided with this file.
*
* These licences may be found online, linked from the end-user license
* agreement that is located at http://www.povray.org/povlegal.html
*---------------------------------------------------------------------------
* This program 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/povray/3.6-release/source/lathe.h $
* $Revision: #2 $
* $Change: 2939 $
* $DateTime: 2004/07/04 13:43:26 $
* $Author: root $
* $Log$
*****************************************************************************/
#ifndef LATHE_H
#define LATHE_H
#include "bcyl.h"
BEGIN_POV_NAMESPACE
/*****************************************************************************
* Global preprocessor definitions
******************************************************************************/
#define LATHE_OBJECT (STURM_OK_OBJECT)
#define LINEAR_SPLINE 1
#define QUADRATIC_SPLINE 2
#define CUBIC_SPLINE 3
#define BEZIER_SPLINE 4
/* Generate additional lathe statistics. */
#define LATHE_EXTRA_STATS 1
/*****************************************************************************
* Global typedefs
******************************************************************************/
typedef struct Lathe_Struct LATHE;
typedef struct Lathe_Spline_Struct LATHE_SPLINE;
typedef struct Lathe_Spline_Entry_Struct LATHE_SPLINE_ENTRY;
struct Lathe_Spline_Entry_Struct
{
UV_VECT A, B, C, D; /* Coefficients of segment */
};
struct Lathe_Spline_Struct
{
int References; /* Count references to this structure. */
LATHE_SPLINE_ENTRY *Entry; /* Array of spline segments. */
BCYL *BCyl; /* bounding cylinder. */
};
struct Lathe_Struct
{
OBJECT_FIELDS
int Spline_Type; /* Spline type (linear, quadratic ...) */
int Number; /* Number of segments!!! */
LATHE_SPLINE *Spline; /* Pointer to spline array */
DBL Height1, Height2; /* Min./Max. height */
DBL Radius1, Radius2; /* Min./Max. radius */
};
/*****************************************************************************
* Global variables
******************************************************************************/
/*****************************************************************************
* Global functions
******************************************************************************/
void Compute_Lathe_BBox (LATHE *Lathe);
void Compute_Lathe (LATHE *Lathe, UV_VECT *P);
LATHE *Create_Lathe (void);
END_POV_NAMESPACE
#endif
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