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/****************************************************************************
* vlbuffer.h
*
* This module contains all defines, typedefs, and prototypes for VLBUFFER.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/vlbuffer.h $
* $Revision: #2 $
* $Change: 2939 $
* $DateTime: 2004/07/04 13:43:26 $
* $Author: root $
* $Log$
*****************************************************************************/
#ifndef VLBUFFER_H
#define VLBUFFER_H
#include "frame.h"
#include "bbox.h"
BEGIN_POV_NAMESPACE
/*****************************************************************************
* Global preprocessor defines
******************************************************************************/
/* flag to mark a node as pruned */
#define PRUNE_CHECK 128
#define PRUNE_TEMPORARY 128
/* Define minimum and maximum values for buffer coordinates. */
#define MIN_BUFFER_ENTRY -32000
#define MAX_BUFFER_ENTRY 32000
/* Define maximum number of clippoints. */
#define MAX_CLIP_POINTS 20
/* Define all six coordinate axes. */
#define XaxisP 0
#define XaxisM 1
#define YaxisP 2
#define YaxisM 3
#define ZaxisP 4
#define ZaxisM 5
/*****************************************************************************
* Global typedefs
******************************************************************************/
typedef struct Project_Tree_Leaf_Struct PROJECT_TREE_LEAF;
typedef struct Project_Queue_Struct PROJECT_QUEUE;
struct Project_Tree_Leaf_Struct
{
unsigned short is_leaf;
BBOX_TREE *Node;
PROJECT Project;
};
struct Project_Queue_Struct
{
unsigned QSize;
unsigned Max_QSize;
PROJECT_TREE_NODE **Queue;
};
/*****************************************************************************
* Global variables
******************************************************************************/
/*****************************************************************************
* Global functions
******************************************************************************/
void Clip_Polygon (VECTOR *Points, int *PointCnt, const VECTOR VX1, const VECTOR VX2, const VECTOR VY1, const VECTOR VY2, const DBL DX1, const DBL DX2, const DBL DY1, const DBL DY2);
void Initialize_VLBuffer_Code (void);
void Reinitialize_VLBuffer_Code (void);
void Deinitialize_VLBuffer_Code (void);
void Destroy_Project_Tree (PROJECT_TREE_NODE *Node);
END_POV_NAMESPACE
#endif
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