khanat-code-old/code/nel/include/nel/3d/height_map.h
2010-06-12 12:17:29 +02:00

84 lines
2.3 KiB
C++

// NeL - MMORPG Framework <http://dev.ryzom.com/projects/nel/>
// Copyright (C) 2010 Winch Gate Property Limited
//
// This program 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.
//
// This program 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/>.
#ifndef NL_HEIGHT_MAP_H
#define NL_HEIGHT_MAP_H
#include "nel/misc/types_nl.h"
#include "nel/misc/bitmap.h"
#include <vector>
namespace NL3D
{
// ***************************************************************************
/**
* A HeightMap. The heightMap is oriented left-right(X+) / bottom-top(Y+).
* \author Lionel Berenguier
* \author Nevrax France
* \date 2001
*/
class CHeightMap
{
public:
std::vector<uint8> Heights;
/// The origin of the bottom-left corner of this heightmap.
float OriginX, OriginY;
/// The size of one Element ot this HeightMap (eg: 160x160 for a zone).
float SizeX, SizeY;
/// The range of heights: 0 to MaxZ.
float MaxZ;
public:
/// Constructor
CHeightMap()
{
SizeX= SizeY= 160;
OriginX= OriginY= 0;
MaxZ= 100;
}
/// resize the heightmap. resize Heights too.
void resize(uint w, uint h);
uint getWidth() const {return _Width;}
uint getHeight() const {return _Height;}
/// return the ZValue, interval is: 0-MaxZ. nlassert(x,y).
float getZ(uint x, uint y) const;
/** This tool method build a HeightMap, from a bitmap, resize(), and fill Heights.
* value are read from bitmap luminance value. NB: Lines are inverted, because bitmap definition is left-right / top-bottom.
*/
void buildFromBitmap(const NLMISC::CBitmap &bitmap);
private:
/// The size of this array. Heights.size
uint _Width, _Height;
};
} // NL3D
#endif // NL_HEIGHT_MAP_H
/* End of height_map.h */