forked from Mirrors/openclonk
73 lines
2.1 KiB
C++
73 lines
2.1 KiB
C++
/*
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* OpenClonk, http://www.openclonk.org
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*
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* Copyright (c) 2014-2015, The OpenClonk Team and contributors
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*
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* Distributed under the terms of the ISC license; see accompanying file
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* "COPYING" for details.
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*
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* "Clonk" is a registered trademark of Matthes Bender, used with permission.
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* See accompanying file "TRADEMARK" for details.
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*
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* To redistribute this file separately, substitute the full license texts
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* for the above references.
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*/
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#ifndef C4FOWAMBIENT_H
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#define C4FOWAMBIENT_H
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//#include <GL/gl.h>
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#include <C4Landscape.h>
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/**
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This class manages a texture that holds the ambient light intensity
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*/
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class C4FoWAmbient
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{
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public:
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C4FoWAmbient();
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~C4FoWAmbient();
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#ifndef USE_CONSOLE
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GLuint Tex;
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#endif
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private:
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// Parameters
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double Resolution;
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double Radius;
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double FullCoverage;
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// Landscape size
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unsigned int LandscapeX;
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unsigned int LandscapeY;
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// Size of ambient map
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unsigned int SizeX;
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unsigned int SizeY;
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// Brightness (not premultiplied)
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double Brightness;
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public:
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void Clear();
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void SetBrightness(double brightness) { Brightness = brightness; }
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double GetBrightness() const { return Brightness; }
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// High resolution will make the map coarser, but speed up the generation process
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// and save video memory.
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// The radius specifies the radius of landscape pixels that are sampled around each pixel
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// to obtain the ambient light.
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// full_coverage is a number between 0 and 1, and it specifies what portion of the full circle
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// needs to be illuminated for full ambient light intensity.
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void CreateFromLandscape(const C4Landscape& landscape, double resolution, double radius, double full_coverage);
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// Update the map after the landscape has changed in the region indicated by update.
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void UpdateFromLandscape(const C4Landscape& landscape, const C4Rect& update);
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// Fills a 2x3 matrix to transform fragment coordinates to ambient map texture coordinates
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void GetFragTransform(const FLOAT_RECT& vpRect, const C4Rect& clipRect, const C4Rect& outRect, float ambientTransform[6]) const;
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unsigned int GetLandscapeWidth() const { return LandscapeX; }
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unsigned int GetLandscapeHeight() const { return LandscapeY; }
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};
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#endif // C4FOWAMBIENT_H
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