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OS/2 Shareware BBS: Graphics
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povsrc31.zip
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discs.h
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2000-05-13
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/****************************************************************************
* discs.h
*
* This module contains all defines, typedefs, and prototypes for DISCS.C.
*
* from Persistence of Vision(tm) Ray Tracer
* Copyright 1996,1999 Persistence of Vision Team
*---------------------------------------------------------------------------
* 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 Team. There are strict rules under
* which you are permitted to use this file. The rules are in the file
* named POVLEGAL.DOC which should be distributed with this file.
* If POVLEGAL.DOC is not available or for more info please contact the POV-Ray
* Team Coordinator by email to team-coord@povray.org or visit us on the web at
* http://www.povray.org. The latest version of POV-Ray may be found at this site.
*
* 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.
*
*****************************************************************************/
#ifndef DISCS_H
#define DISCS_H
/*****************************************************************************
* Global preprocessor defines
******************************************************************************/
#define DISC_OBJECT (BASIC_OBJECT)
/*****************************************************************************
* Global typedefs
******************************************************************************/
typedef struct Disc_Struct DISC;
struct Disc_Struct
{
OBJECT_FIELDS
#ifndef FastDiscPatch
TRANSFORM *Trans; /* Transformation of a Disc object */
VECTOR center; /* Center of the disc */
VECTOR normal; /* Direction perpendicular to the disc (plane normal) */
DBL d; /* The constant part of the plane equation */
DBL iradius2; /* Distance from center to inner circle of the disc */
DBL oradius2; /* Distance from center to outer circle of the disc */
#else
int Dominant_Axis; /* Dominant axis. [DDMM] */
UV_VECT u_axis, v_axis; /* main axises of projection. [DDMM] */
VECTOR x_axis, y_axis; /* disc's axis. [DDMM] */
VECTOR center; /* Center of the disc */
VECTOR normal; /* Direction perpendicular to the disc (plane normal) */
DBL d; /* The constant part of the plane equation */
DBL iradius2; /* Distance from center to inner circle of the disc */
#endif
};
/*****************************************************************************
* Global variables
******************************************************************************/
/*****************************************************************************
* Global functions
******************************************************************************/
DISC *Create_Disc (void);
#ifndef FastDiscPatch
void Compute_Disc (DISC *Disc);
#else
void Compute_Disc (DISC *Disc, VECTOR center, VECTOR normal, DBL radius_inner, DBL radius_outer );
#endif
#endif