vhlt/hlvis/zones.h

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2016-09-20 21:07:53 +00:00
// Copyright (C) 2000 Sean Cavanaugh
// This file is licensed under the terms of the Lesser GNU Public License
// (see LPGL.txt, or http://www.gnu.org/copyleft/lesser.txt)
#ifndef ZONING_H__
#define ZONING_H__
#if _MSC_VER >= 1000
#pragma once
#endif
#include "basictypes.h"
#include "winding.h"
#include "boundingbox.h"
// Simple class of visibily flags and zone id's. No concept of location is in this class
class Zones
{
public:
inline void flag(UINT32 src, UINT32 dst)
{
if ((src < m_ZoneCount) && (dst < m_ZoneCount))
{
m_ZonePtrs[src][dst] = true;
m_ZonePtrs[dst][src] = true;
}
}
inline bool check(UINT32 zone1, UINT32 zone2)
{
if ((zone1 < m_ZoneCount) && (zone2 < m_ZoneCount))
{
return m_ZonePtrs[zone1][zone2];
}
return false;
}
void set(UINT32 zone, const BoundingBox& bounds);
UINT32 getZoneFromBounds(const BoundingBox& bounds);
UINT32 getZoneFromWinding(const Winding& winding);
public:
Zones(UINT32 ZoneCount)
{
m_ZoneCount = ZoneCount + 1; // Zone 0 is used for all points outside all nodes
m_ZoneVisMatrix = new bool[m_ZoneCount * m_ZoneCount];
memset(m_ZoneVisMatrix, 0, sizeof(bool) * m_ZoneCount * m_ZoneCount);
m_ZonePtrs = new bool*[m_ZoneCount];
m_ZoneBounds = new BoundingBox[m_ZoneCount];
UINT32 x;
bool* dstPtr = m_ZoneVisMatrix;
bool** srcPtr = m_ZonePtrs;
for (x=0; x<m_ZoneCount; x++, srcPtr++, dstPtr += m_ZoneCount)
{
*srcPtr = dstPtr;
}
}
virtual ~Zones()
{
delete[] m_ZoneVisMatrix;
delete[] m_ZonePtrs;
delete[] m_ZoneBounds;
}
protected:
UINT32 m_ZoneCount;
bool* m_ZoneVisMatrix; // Size is (m_ZoneCount * m_ZoneCount) and data is duplicated for efficiency
bool** m_ZonePtrs; // Lookups into m_ZoneMatrix for m_ZonePtrs[x][y] style;
BoundingBox* m_ZoneBounds;
};
Zones* MakeZones();
#endif